zoneinfo - zygaena/hammerhead

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zoneinfo Plain Text 20366 lines 868.1 KB
#
# Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#

# "etcetera" must be listed before "backward" because it sets up links that
# "backward" needs.
TZFILES=	africa \
		antarctica \
		asia \
		australasia \
		etcetera \
		europe \
		factory \
		northamerica \
		southamerica \
		backward

# Don't build the systemv timezones, but do install the source file.
SRCFILES=	$(TZFILES) systemv README
TABFILES=	continent.tab country.tab zone_sun.tab

include		$(SRC)/data/Makefile.data

ROOTTZD=	$(ROOTSHLIB)/zoneinfo
ROOTTZSRCD=	$(ROOTSHLIB)/zoneinfo/src
ROOTTZTABD=	$(ROOTSHLIB)/zoneinfo/tab
DIRS=		$(ROOTTZSRCD) $(ROOTTZTABD)

ROOTLIBTZSRCFILES=$(SRCFILES:%=$(ROOTTZSRCD)/%)
ROOTLIBTZTABFILES=$(TABFILES:%=$(ROOTTZTABD)/%)

$(ROOTLIBTZSRCFILES): FILEMODE=0644
$(ROOTLIBTZTABFILES): FILEMODE=0644

# Message catalog
TEXT_DOMAIN=	SUNW_OST_ZONEINFO
MSGDOMAIN=	$(MSGROOT)/$(TEXT_DOMAIN)
POFILE=		zoneinfo.po

#
# We must instruct zic to output backwards-compatible output, aka still include
# the v1 data in addition to the v2 data. This is useful for readers of
# different eras and what most systems do as well. When this is omitted then the
# current zic default is to include a v1 header with no information.
#
ZICMODE=	-b fat

.KEEP_STATE:

all:		$(TZFILES) $(TABFILES)

install:	$(DIRS) $(ROOTTZSRCD) $(ROOTTZTABD) $(ROOTLIBTZSRCFILES) \
		$(ROOTLIBTZTABFILES)
		$(ZIC) $(ZICMODE) -d $(ROOTTZD) $(TZFILES)

$(ROOTTZSRCD)/%: %
		$(INS.file)

$(ROOTTZTABD)/%: %
		$(INS.file)

$(DIRS):
		$(INS.dir)

clean:

# For message catalogue files
_msg:		$(MSGDOMAIN) $(POFILE)
		$(RM) $(MSGDOMAIN)/$(POFILE)
		$(CP) $(POFILE) $(MSGDOMAIN)/$(POFILE)

$(MSGDOMAIN):
		$(INS.dir)

$(POFILE):	$(TABFILES) do_pofile.sh
		$(RM) $@
		@/bin/sh do_pofile.sh > $@

update:		FRC
		./update_manifest $(TZFILES)

FRC:

include		$(SRC)/data/Makefile.targ
Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.

The /usr/share/lib/zoneinfo/src directory contains zoneinfo timezone source
files.  These source files have been compiled using zic(8) to create
the zoneinfo data files in /usr/share/lib/zoneinfo.  The zic command can be
used with the zoneinfo source files to create additional data files.

The zoneinfo files track the Olson public source provided at
ftp://elsie.nci.nih.gov/pub/, therefore zoneinfo files may be added and
removed as the Solaris source is updated.  The current Solaris release of
the zoneinfo files is based on tzdata2010k.tar.gz.

The /usr/share/lib/zoneinfo/GMT[+-]* timezones listed below have been
removed from the release.  Replace usage of the
/usr/share/lib/zoneinfo/GMT[+-]* files with the equivalent quoted timezone
(see environ(7)).  Note the signs of the offsets of the equivalent quoted
timezone are reversed from the signs of the /usr/share/lib/zoneinfo/GMT[+-]*
files.

For example, replace TZ=:GMT+1, with TZ="<GMT-1>-1".  (The colon (:) is
significant.  Without the colon, for example TZ=GMT+1, an unquoted timezone
is used;  unquoted timezones are not affected by the removal of the zoneinfo
timezone files listed below.)

The following files have been removed from the release:

/usr/share/lib/zoneinfo/GMT-12
/usr/share/lib/zoneinfo/GMT-11
/usr/share/lib/zoneinfo/GMT-10
/usr/share/lib/zoneinfo/GMT-9
/usr/share/lib/zoneinfo/GMT-8
/usr/share/lib/zoneinfo/GMT-7
/usr/share/lib/zoneinfo/GMT-6
/usr/share/lib/zoneinfo/GMT-5
/usr/share/lib/zoneinfo/GMT-4
/usr/share/lib/zoneinfo/GMT-3
/usr/share/lib/zoneinfo/GMT-2
/usr/share/lib/zoneinfo/GMT-1
/usr/share/lib/zoneinfo/GMT+1
/usr/share/lib/zoneinfo/GMT+2
/usr/share/lib/zoneinfo/GMT+3
/usr/share/lib/zoneinfo/GMT+4
/usr/share/lib/zoneinfo/GMT+5
/usr/share/lib/zoneinfo/GMT+6
/usr/share/lib/zoneinfo/GMT+7
/usr/share/lib/zoneinfo/GMT+8
/usr/share/lib/zoneinfo/GMT+9
/usr/share/lib/zoneinfo/GMT+10
/usr/share/lib/zoneinfo/GMT+11
/usr/share/lib/zoneinfo/GMT+12
/usr/share/lib/zoneinfo/GMT+13

As zoneinfo timezones are updated, the savings/daylight transition rules
and timezone name abbreviations may change.  This can affect how 
the times are calculated in the local timezone.  Therefore the interpretation
of a time_t value can vary amongst Solaris releases that use different
versions of the zoneinfo timezones.

The zoneinfo timezone data files do not transition past
Tue Jan 19 03:14:07 2038 GMT.  Therefore for 64-bit applications using
zoneinfo timezones, calculations beyond this date may not use the correct
offset from standard time, and could return incorrect values.  This affects
64-bit versions of interfaces such as ascftime(3C), cftime(3C), ctime(3C),
getdate(3C), ftime(3C), mktime(3C), and localtime(3C).

For more information see zic(8), zdump(8), environ(7), TIMEZONE(5),
ctime(3C), and mktime(3C) man pages.
#
# This file and its contents are supplied under the terms of the
# Common Development and Distribution License ("CDDL"), version 1.0.
# You may only use this file in accordance with the terms of version
# 1.0 of the CDDL.
#
# A full copy of the text of the CDDL should have accompanied this
# source.  A copy of the CDDL is also available via the Internet at
# http://www.illumos.org/license/CDDL.
#

#
# Copyright (c) 2014 Joyent, Inc.  All rights reserved.
# Copyright 2021 OmniOS Community Edition (OmniOSce) Association.
#

How to update the TZ database information.

Welcome! You've probably heard that some aspect of time has changed and
you're wondering what to do. The first thing to do is to grab the latest
version of the time database which can currently be found at:

http://www.iana.org/time-zones

You'll need the data tarball. Most data files are used in the gate
directly; however, a few have slightly different names. The following
commands assume that you're inside of the directory you extracted the
time zone files.

$ cp africa antarctica asia australasia backward etcetera europe \
  northamerica southamerica $CODEMGR_WS/usr/src/data/zoneinfo

Next you need to copy the country tab and the zone tab files. These have
different names in our source tree.

$ cp iso3166.tab $CODEMGR_WS/usr/src/data/zoneinfo/country.tab
$ cp zone.tab $CODEMGR_WS/usr/src/data/zoneinfo/zone.tab.txt

Now, you need to manually fix up the zone_sun.tab. zone_sun.tab has
additional different zone names that the original does not. As things
are changed and removed, or coordinates updated, the same should be done
in zone_sun.tab. The simplest way known to deal with it today is
something like the following:

$ cd $CODEMGR_WS/usr/src/data/zoneinfo
$ vimdiff zone.tab.txt zone_sun.tab

And as you see things that show up as egregiously different, do a 'git
diff zone.tab.txt' and see what changed and fix zone_sun.tab
appropriately. Usually this means deleting removed entries and adding
new ones.

********** IMPORTANT **********
*** zone_sun.tab must remain sorted.
*** The upstream zone.tab.txt is not always completely in alphabetical order.

To check the final zone_sun.tab file, the `zonelint` script in the current
directory can be used within a bldenv environment. First run `dmake install`
to stage the zone files to proto, then run `./zonelint`. If it produces no
output then you're okay.

After that's done, you'll need to go through the more agonizing process of
packaging. To do this, you'll want to look through the differences in "Link"
lines in all files under $CODEMGR_WS/usr/src/data/zoneinfo/
These "Link" lines describe hardlinks that need to exist in packaging.
Specifically, if you have a line in the form of:

LINK	Arda/Beleriand	Arda/Gondolin

That instructs that Gondolin should be hardlinked to Beleriand. In IPS parlance
that'd be:

hardlink path=usr/share/lib/zoneinfo/Arda/Gondolin target=Beleriand

The 'update' make target can help with this by automatically re-generating all
of the hardlinks in the package manifest based on the Link lines found in the
data files. Run 'make update' and then check the manifest file at
$CODEMGR_WS/usr/src/pkg/manifests/system-data-zoneinfo.p5m to ensure it has
done the right thing.

Other differences in files describe the addition and removal of various
file entries. The update_manifest script will take care of files which have
changed to links but others may need manual adjustment. If you're not friends
with protocmp yet, this should help you out.

Once both of those are done, you'll need to update the version of the package
itself in the manifest. IANA releases these as <year><letter>, eg. 2013i.
Instead, you need to encode that letter to its spot in the alphabet. So 2013i
would become 2013.9.

Once packaging is all done, then you should be all set.
# tzdb data for Africa and environs

# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.

# This file is by no means authoritative; if you think you know better,
# go ahead and edit the file (and please send any changes to
# tz@iana.org for general use in the future).  For more, please see
# the file CONTRIBUTING in the tz distribution.

# From Paul Eggert (2018-05-27):
#
# Unless otherwise specified, the source for data through 1990 is:
# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
# San Diego: ACS Publications, Inc. (2003).
# Unfortunately this book contains many errors and cites no sources.
#
# Many years ago Gwillim Law wrote that a good source
# for time zone data was the International Air Transport
# Association's Standard Schedules Information Manual (IATA SSIM),
# published semiannually.  Law sent in several helpful summaries
# of the IATA's data after 1990.  Except where otherwise noted,
# IATA SSIM is the source for entries after 1990.
#
# Another source occasionally used is Edward W. Whitman, World Time Differences,
# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
# I found in the UCLA library.
#
# For data circa 1899, a common source is:
# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
# https://www.jstor.org/stable/1774359
#
# For the 1911/1912 establishment of standard time in French possessions, see:
# Société Française de Physique, Recueil de constantes physiques (1913),
# page 752, 18b.
#
# European-style abbreviations are commonly used along the Mediterranean.
# For sub-Saharan Africa abbreviations were less standardized.
# Previous editions of this database used WAT, CAT, SAT, and EAT
# for UT +00 through +03, respectively,
# but in 1997 Mark R V Murray reported that
# 'SAST' is the official abbreviation for +02 in the country of South Africa,
# 'CAT' is commonly used for +02 in countries north of South Africa, and
# 'WAT' is probably the best name for +01, as the common phrase for
# the area that includes Nigeria is "West Africa".
#
# To summarize, the following abbreviations seemed to have some currency:
#	 +00	GMT	Greenwich Mean Time
#	 +02	CAT	Central Africa Time
#	 +02	SAST	South Africa Standard Time
# and Murray suggested the following abbreviation:
#	 +01	WAT	West Africa Time
# Murray's suggestion seems to have caught on in news reports and the like.
# I vaguely recall 'WAT' also being used for -01 in the past but
# cannot now come up with solid citations.
#
# I invented the following abbreviations in the 1990s:
#	 +02	WAST	West Africa Summer Time
#	 +03	CAST	Central Africa Summer Time
#	 +03	SAST	South Africa Summer Time
#	 +03	EAT	East Africa Time
# 'EAT' seems to have caught on and is in current timestamps, and though
# the other abbreviations are rarer and are only in past timestamps,
# they are paired with better-attested non-DST abbreviations.
# Corrections are welcome.

# Algeria
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Algeria	1916	only	-	Jun	14	23:00s	1:00	S
Rule	Algeria	1916	1919	-	Oct	Sun>=1	23:00s	0	-
Rule	Algeria	1917	only	-	Mar	24	23:00s	1:00	S
Rule	Algeria	1918	only	-	Mar	 9	23:00s	1:00	S
Rule	Algeria	1919	only	-	Mar	 1	23:00s	1:00	S
Rule	Algeria	1920	only	-	Feb	14	23:00s	1:00	S
Rule	Algeria	1920	only	-	Oct	23	23:00s	0	-
Rule	Algeria	1921	only	-	Mar	14	23:00s	1:00	S
Rule	Algeria	1921	only	-	Jun	21	23:00s	0	-
Rule	Algeria	1939	only	-	Sep	11	23:00s	1:00	S
Rule	Algeria	1939	only	-	Nov	19	 1:00	0	-
Rule	Algeria	1944	1945	-	Apr	Mon>=1	 2:00	1:00	S
Rule	Algeria	1944	only	-	Oct	 8	 2:00	0	-
Rule	Algeria	1945	only	-	Sep	16	 1:00	0	-
Rule	Algeria	1971	only	-	Apr	25	23:00s	1:00	S
Rule	Algeria	1971	only	-	Sep	26	23:00s	0	-
Rule	Algeria	1977	only	-	May	 6	 0:00	1:00	S
Rule	Algeria	1977	only	-	Oct	21	 0:00	0	-
Rule	Algeria	1978	only	-	Mar	24	 1:00	1:00	S
Rule	Algeria	1978	only	-	Sep	22	 3:00	0	-
Rule	Algeria	1980	only	-	Apr	25	 0:00	1:00	S
Rule	Algeria	1980	only	-	Oct	31	 2:00	0	-
# See Europe/Paris for PMT-related transitions.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Africa/Algiers	0:12:12 -	LMT	1891 Mar 16
			0:09:21	-	PMT	1911 Mar 11 # Paris Mean Time
			0:00	Algeria	WE%sT	1940 Feb 25  2:00
			1:00	Algeria	CE%sT	1946 Oct  7
			0:00	-	WET	1956 Jan 29
			1:00	-	CET	1963 Apr 14
			0:00	Algeria	WE%sT	1977 Oct 21
			1:00	Algeria	CE%sT	1979 Oct 26
			0:00	Algeria	WE%sT	1981 May
			1:00	-	CET

# Cape Verde / Cabo Verde
#
# From Tim Parenti (2024-07-01), per Paul Eggert (2018-02-16):
# For timestamps before independence, see commentary for Europe/Lisbon.
# Shanks gives 1907 instead for the transition to -02.
#
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Atlantic/Cape_Verde -1:34:04 -	LMT	1912 Jan 01  2:00u # Praia
			-2:00	-	%z	1942 Sep
			-2:00	1:00	%z	1945 Oct 15
			-2:00	-	%z	1975 Nov 25  2:00
			-1:00	-	%z

# Chad
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Africa/Ndjamena	1:00:12 -	LMT	1912 Jan  1 # N'Djamena
			1:00	-	WAT	1979 Oct 14
			1:00	1:00	WAST	1980 Mar  8
			1:00	-	WAT

# Burkina Faso
# Côte d'Ivoire (Ivory Coast)
# The Gambia
# Ghana
# Guinea
# Iceland
# Mali
# Mauritania
# St Helena
# Senegal
# Sierra Leone
# Togo

# The other parts of the St Helena territory are similar:
#	Tristan da Cunha: on GMT, say Whitman and the CIA
#	Ascension: on GMT, say the USNO (1995-12-21) and the CIA
#	Gough (scientific station since 1955; sealers wintered previously):
#		on GMT, says the CIA
#	Inaccessible, Nightingale: uninhabited

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Africa/Abidjan	-0:16:08 -	LMT	1912 Jan  1
			 0:00	-	GMT

###############################################################################

# Egypt

# Milne says Cairo used 2:05:08.9, the local mean time of the Abbasizeh
# observatory.  Milne also says that the official time for
# Egypt was mean noon at the Great Pyramid, 2:04:30.5, but apparently this
# did not apply to Cairo, Alexandria, or Port Said.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Egypt	1940	only	-	Jul	15	0:00	1:00	S
Rule	Egypt	1940	only	-	Oct	 1	0:00	0	-
Rule	Egypt	1941	only	-	Apr	15	0:00	1:00	S
Rule	Egypt	1941	only	-	Sep	16	0:00	0	-
Rule	Egypt	1942	1944	-	Apr	 1	0:00	1:00	S
Rule	Egypt	1942	only	-	Oct	27	0:00	0	-
Rule	Egypt	1943	1945	-	Nov	 1	0:00	0	-
Rule	Egypt	1945	only	-	Apr	16	0:00	1:00	S
Rule	Egypt	1957	only	-	May	10	0:00	1:00	S
Rule	Egypt	1957	1958	-	Oct	 1	0:00	0	-
Rule	Egypt	1958	only	-	May	 1	0:00	1:00	S
Rule	Egypt	1959	1981	-	May	 1	1:00	1:00	S
Rule	Egypt	1959	1965	-	Sep	30	3:00	0	-
Rule	Egypt	1966	1994	-	Oct	 1	3:00	0	-
Rule	Egypt	1982	only	-	Jul	25	1:00	1:00	S
Rule	Egypt	1983	only	-	Jul	12	1:00	1:00	S
Rule	Egypt	1984	1988	-	May	 1	1:00	1:00	S
Rule	Egypt	1989	only	-	May	 6	1:00	1:00	S
Rule	Egypt	1990	1994	-	May	 1	1:00	1:00	S
# IATA (after 1990) says transitions are at 0:00.
# Go with IATA starting in 1995, except correct 1995 entry from 09-30 to 09-29.

# From Alexander Krivenyshev (2011-04-20):
# "...Egypt's interim cabinet decided on Wednesday to cancel daylight
# saving time after a poll posted on its website showed the majority of
# Egyptians would approve the cancellation."
#
# Egypt to cancel daylight saving time
# http://www.almasryalyoum.com/en/node/407168
# or
# http://www.worldtimezone.com/dst_news/dst_news_egypt04.html
Rule	Egypt	1995	2010	-	Apr	lastFri	 0:00s	1:00	S
Rule	Egypt	1995	2005	-	Sep	lastThu	24:00	0	-
# From Steffen Thorsen (2006-09-19):
# The Egyptian Gazette, issue 41,090 (2006-09-18), page 1, reports:
# Egypt will turn back clocks by one hour at the midnight of Thursday
# after observing the daylight saving time since May.
# http://news.gom.com.eg/gazette/pdf/2006/09/18/01.pdf
Rule	Egypt	2006	only	-	Sep	21	24:00	0	-
# From Dirk Losch (2007-08-14):
# I received a mail from an airline which says that the daylight
# saving time in Egypt will end in the night of 2007-09-06 to 2007-09-07.
# From Jesper Nørgaard Welen (2007-08-15): [The following agree:]
# http://www.nentjes.info/Bill/bill5.htm
# https://www.timeanddate.com/worldclock/city.html?n=53
# From Steffen Thorsen (2007-09-04): The official information...:
# http://www.sis.gov.eg/En/EgyptOnline/Miscellaneous/000002/0207000000000000001580.htm
Rule	Egypt	2007	only	-	Sep	Thu>=1	24:00	0	-
# From Abdelrahman Hassan (2007-09-06):
# Due to the Hijri (lunar Islamic calendar) year being 11 days shorter
# than the year of the Gregorian calendar, Ramadan shifts earlier each
# year. This year it will be observed September 13 (September is quite
# hot in Egypt), and the idea is to make fasting easier for workers by
# shifting business hours one hour out of daytime heat. Consequently,
# unless discontinued, next DST may end Thursday 28 August 2008.
# From Paul Eggert (2007-08-17):
# For lack of better info, assume the new rule is last Thursday in August.

# From Petr Machata (2009-04-06):
# The following appeared in Red Hat bugzilla[1] (edited):
#
# > $ zdump -v /usr/share/zoneinfo/Africa/Cairo | grep 2009
# > /usr/share/zoneinfo/Africa/Cairo  Thu Apr 23 21:59:59 2009 UTC = Thu =
# Apr 23
# > 23:59:59 2009 EET isdst=0 gmtoff=7200
# > /usr/share/zoneinfo/Africa/Cairo  Thu Apr 23 22:00:00 2009 UTC = Fri =
# Apr 24
# > 01:00:00 2009 EEST isdst=1 gmtoff=10800
# > /usr/share/zoneinfo/Africa/Cairo  Thu Aug 27 20:59:59 2009 UTC = Thu =
# Aug 27
# > 23:59:59 2009 EEST isdst=1 gmtoff=10800
# > /usr/share/zoneinfo/Africa/Cairo  Thu Aug 27 21:00:00 2009 UTC = Thu =
# Aug 27
# > 23:00:00 2009 EET isdst=0 gmtoff=7200
#
# > end date should be Thu Sep 24 2009 (Last Thursday in September at 23:59=
# :59)
# > http://support.microsoft.com/kb/958729/
#
# timeanddate[2] and another site I've found[3] also support that.
#
# [1] https://bugzilla.redhat.com/show_bug.cgi?id=492263
# [2] https://www.timeanddate.com/worldclock/clockchange.html?n=53
# [3] https://wwp.greenwichmeantime.com/time-zone/africa/egypt/

# From Arthur David Olson (2009-04-20):
# In 2009 (and for the next several years), Ramadan ends before the fourth
# Thursday in September; Egypt is expected to revert to the last Thursday
# in September.

# From Steffen Thorsen (2009-08-11):
# We have been able to confirm the August change with the Egyptian Cabinet
# Information and Decision Support Center:
# https://www.timeanddate.com/news/time/egypt-dst-ends-2009.html
#
# The Middle East News Agency
# https://www.mena.org.eg/index.aspx
# also reports "Egypt starts winter time on August 21"
# today in article numbered "71, 11/08/2009 12:25 GMT."
# Only the title above is available without a subscription to their service,
# and can be found by searching for "winter" in their search engine
# (at least today).

# From Alexander Krivenyshev (2010-07-20):
# According to News from Egypt - Al-Masry Al-Youm Egypt's cabinet has
# decided that Daylight Saving Time will not be used in Egypt during
# Ramadan.
#
# Arabic translation:
# "Clocks to go back during Ramadan - and then forward again"
# http://www.almasryalyoum.com/en/news/clocks-go-back-during-ramadan-and-then-forward-again
# http://www.worldtimezone.com/dst_news/dst_news_egypt02.html

# From Ahmad El-Dardiry (2014-05-07):
# Egypt is to change back to Daylight system on May 15
# http://english.ahram.org.eg/NewsContent/1/64/100735/Egypt/Politics-/Egypts-government-to-reapply-daylight-saving-time-.aspx

# From Gunther Vermier (2014-05-13):
# our Egypt office confirms that the change will be at 15 May "midnight" (24:00)

# From Imed Chihi (2014-06-04):
# We have finally "located" a precise official reference about the DST changes
# in Egypt.  The Ministers Cabinet decision is explained at
# http://www.cabinet.gov.eg/Media/CabinetMeetingsDetails.aspx?id=347 ...
# [T]his (Arabic) site is not accessible outside Egypt, but the page ...
# translates into: "With regard to daylight saving time, it is scheduled to
# take effect at exactly twelve o'clock this evening, Thursday, 15 MAY 2014,
# to be suspended by twelve o'clock on the evening of Thursday, 26 JUN 2014,
# and re-established again at the end of the month of Ramadan, at twelve
# o'clock on the evening of Thursday, 31 JUL 2014."  This statement has been
# reproduced by other (more accessible) sites[, e.g.,]...
# http://elgornal.net/news/news.aspx?id=4699258

# From Steffen Thorsen (2015-04-08):
# Egypt will start DST on midnight after Thursday, April 30, 2015.
# This is based on a law (no 35) from May 15, 2014 saying it starts the last
# Thursday of April....  Clocks will still be turned back for Ramadan, but
# dates not yet announced....
# http://almogaz.com/news/weird-news/2015/04/05/1947105 ...
# https://www.timeanddate.com/news/time/egypt-starts-dst-2015.html

# From Ahmed Nazmy (2015-04-20):
# Egypt's ministers cabinet just announced ... that it will cancel DST at
# least for 2015.
#
# From Tim Parenti (2015-04-20):
# http://english.ahram.org.eg/WriterArticles/NewsContentP/1/128195/Egypt/No-daylight-saving-this-summer-Egypts-prime-minist.aspx
# "Egypt's cabinet agreed on Monday not to switch clocks for daylight saving
# time this summer, and carry out studies on the possibility of canceling the
# practice altogether in future years."
#
# From Paul Eggert (2015-04-24):
# Yesterday the office of Egyptian President El-Sisi announced his
# decision to abandon DST permanently.  See Ahram Online 2015-04-24.
# http://english.ahram.org.eg/NewsContent/1/64/128509/Egypt/Politics-/Sisi-cancels-daylight-saving-time-in-Egypt.aspx

# From Steffen Thorsen (2016-04-29):
# Egypt will have DST from July 7 until the end of October....
# http://english.ahram.org.eg/NewsContentP/1/204655/Egypt/Daylight-savings-time-returning-to-Egypt-on--July.aspx
# From Mina Samuel (2016-07-04):
# Egyptian government took the decision to cancel the DST,

# From Ahmad ElDardiry (2023-03-01):
# Egypt officially announced today that daylight savings will be
# applied from last Friday of April to last Thursday of October.
# From Paul Eggert (2023-03-01):
# Assume transitions are at 00:00 and 24:00 respectively.
# From Amir Adib (2023-03-07):
# https://www.facebook.com/EgyptianCabinet/posts/638829614954129/

Rule	Egypt	2008	only	-	Aug	lastThu	24:00	0	-
Rule	Egypt	2009	only	-	Aug	20	24:00	0	-
Rule	Egypt	2010	only	-	Aug	10	24:00	0	-
Rule	Egypt	2010	only	-	Sep	 9	24:00	1:00	S
Rule	Egypt	2010	only	-	Sep	lastThu	24:00	0	-
Rule	Egypt	2014	only	-	May	15	24:00	1:00	S
Rule	Egypt	2014	only	-	Jun	26	24:00	0	-
Rule	Egypt	2014	only	-	Jul	31	24:00	1:00	S
Rule	Egypt	2014	only	-	Sep	lastThu	24:00	0	-
Rule	Egypt	2023	max	-	Apr	lastFri	 0:00	1:00	S
Rule	Egypt	2023	max	-	Oct	lastThu	24:00	0	-

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
		#STDOFF	2:05:08.9
Zone	Africa/Cairo	2:05:09 -	LMT	1900 Oct
			2:00	Egypt	EE%sT

# Guinea-Bissau
#
# From Tim Parenti (2024-07-01), per Paul Eggert (2018-02-16):
# For timestamps before independence, see commentary for Europe/Lisbon.
#
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Africa/Bissau	-1:02:20 -	LMT	1912 Jan  1  1:00u
			-1:00	-	%z	1975
			 0:00	-	GMT

# Comoros
# Djibouti
# Eritrea
# Ethiopia
# Kenya
# Madagascar
# Mayotte
# Somalia
# Tanzania
# Uganda

# From P Chan (2020-10-24):
#
# The standard time of GMT+2:30 was adopted in the East Africa Protectorate....
# [The Official Gazette, 1908-05-01, p 274]
# https://books.google.com/books?id=e-cAC-sjPSEC&pg=PA274
#
# At midnight on 30 June 1928 the clocks throughout Kenya was put forward
# half an hour by the Alteration of Time Ordinance, 1928.
# https://gazettes.africa/archive/ke/1928/ke-government-gazette-dated-1928-05-11-no-28.pdf
# [Ordinance No. 11 of 1928, The Official Gazette, 1928-06-26, p 813]
# https://books.google.com/books?id=2S0S6os32ZUC&pg=PA813
#
# The 1928 ordinance was repealed by the Alteration of Time (repeal) Ordinance,
# 1929 and the time was restored to GMT+2:30 at midnight on 4 January 1930.
# [Ordinance No. 97 of 1929, The Official Gazette, 1929-12-31, p 2701]
# https://books.google.com/books?id=_g18jIZQlwwC&pg=PA2701
#
# The Alteration of Time Ordinance, 1936 changed the time to GMT+2:45
# and repealed the previous ordinance at midnight on 31 December 1936.
# [The Official Gazette, 1936-07-21, p 705]
# https://books.google.com/books?id=K7j41z0aC5wC&pg=PA705
#
# The Defence (Amendment of Laws No. 120) Regulations changed the time
# to GMT+3 at midnight on 31 July 1942.
# [Kenya Official Gazette Supplement No. 32, 1942-07-21, p 331]
# https://books.google.com/books?hl=zh-TW&id=c_E-AQAAIAAJ&pg=PA331
# The provision of the 1936 ordinance was not repealed and was later
# incorporated in the Interpretation and General Clauses Ordinance in 1948.
# Although it was overridden by the 1942 regulations.
# [The Laws of Kenya in force on 1948-09-21, Title I, Chapter 1, 31]
# https://dds.crl.edu/item/217517 (p.101)
# In 1950 the Interpretation and General Clauses Ordinance was amended to adopt
# GMT+3 permanently as the 1942 regulations were due to expire on 10 December.
# https://books.google.com/books?id=jvR8mUDAwR0C&pg=PA787
# [Ordinance No. 44 of 1950, Kenya Ordinances 1950, Vol. XXIX, p 294]
# https://books.google.com/books?id=-_dQAQAAMAAJ&pg=PA294

# From Paul Eggert (2020-10-24):
# The 1908-05-01 announcement does not give an effective date,
# so just say "1908 May".

# From Paul Eggert (2018-09-11):
# Unfortunately tzdb records only Western clock time in use in Ethiopia,
# as the tzdb format is not up to properly recording a common Ethiopian
# timekeeping practice that is based on solar time.  See:
# Mortada D. If you have a meeting in Ethiopia, you'd better double
# check the time. PRI's The World. 2015-01-30 15:15 -05.
# https://www.pri.org/stories/2015-01-30/if-you-have-meeting-ethiopia-you-better-double-check-time

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Africa/Nairobi	2:27:16	-	LMT	1908 May
			2:30	-	%z	1928 Jun 30 24:00
			3:00	-	EAT	1930 Jan  4 24:00
			2:30	-	%z	1936 Dec 31 24:00
			2:45	-	%z	1942 Jul 31 24:00
			3:00	-	EAT

# Liberia
#
# From Paul Eggert (2017-03-02):
#
# The Nautical Almanac for the Year 1970, p 264, is the source for -0:44:30.
#
# In 1972 Liberia was the last country to switch from a UT offset
# that was not a multiple of 15 or 20 minutes.  The 1972 change was on
# 1972-01-07, according to an entry dated 1972-01-04 on p 330 of:
# Presidential Papers: First year of the administration of
# President William R. Tolbert, Jr., July 23, 1971-July 31, 1972.
# Monrovia: Executive Mansion.
#
# Use the abbreviation "MMT" before 1972, as the more accurate numeric
# abbreviation "-004430" would be one byte over the POSIX limit.
#
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Africa/Monrovia	-0:43:08 -	LMT	1882
			-0:43:08 -	MMT	1919 Mar # Monrovia Mean Time
			-0:44:30 -	MMT	1972 Jan 7 # approximately MMT
			 0:00	-	GMT

###############################################################################

# Libya

# From Even Scharning (2012-11-10):
# Libya set their time one hour back at 02:00 on Saturday November 10.
# https://www.libyaherald.com/2012/11/04/clocks-to-go-back-an-hour-on-saturday/
# Here is an official source [in Arabic]: http://ls.ly/fb6Yc
#
# Steffen Thorsen forwarded a translation (2012-11-10) in
# https://mm.icann.org/pipermail/tz/2012-November/018451.html
#
# From Tim Parenti (2012-11-11):
# Treat the 2012-11-10 change as a zone change from UTC+2 to UTC+1.
# The DST rules planned for 2013 and onward roughly mirror those of Europe
# (either two days before them or five days after them, so as to fall on
# lastFri instead of lastSun).

# From Even Scharning (2013-10-25):
# The scheduled end of DST in Libya on Friday, October 25, 2013 was
# cancelled yesterday....
# https://www.libyaherald.com/2013/10/24/correction-no-time-change-tomorrow/
#
# From Paul Eggert (2013-10-25):
# For now, assume they're reverting to the pre-2012 rules of permanent UT +02.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Libya	1951	only	-	Oct	14	2:00	1:00	S
Rule	Libya	1952	only	-	Jan	 1	0:00	0	-
Rule	Libya	1953	only	-	Oct	 9	2:00	1:00	S
Rule	Libya	1954	only	-	Jan	 1	0:00	0	-
Rule	Libya	1955	only	-	Sep	30	0:00	1:00	S
Rule	Libya	1956	only	-	Jan	 1	0:00	0	-
Rule	Libya	1982	1984	-	Apr	 1	0:00	1:00	S
Rule	Libya	1982	1985	-	Oct	 1	0:00	0	-
Rule	Libya	1985	only	-	Apr	 6	0:00	1:00	S
Rule	Libya	1986	only	-	Apr	 4	0:00	1:00	S
Rule	Libya	1986	only	-	Oct	 3	0:00	0	-
Rule	Libya	1987	1989	-	Apr	 1	0:00	1:00	S
Rule	Libya	1987	1989	-	Oct	 1	0:00	0	-
Rule	Libya	1997	only	-	Apr	 4	0:00	1:00	S
Rule	Libya	1997	only	-	Oct	 4	0:00	0	-
Rule	Libya	2013	only	-	Mar	lastFri	1:00	1:00	S
Rule	Libya	2013	only	-	Oct	lastFri	2:00	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Africa/Tripoli	0:52:44 -	LMT	1920
			1:00	Libya	CE%sT	1959
			2:00	-	EET	1982
			1:00	Libya	CE%sT	1990 May  4
# The 1996 and 1997 entries are from Shanks & Pottenger;
# the IATA SSIM data entries contain some obvious errors.
			2:00	-	EET	1996 Sep 30
			1:00	Libya	CE%sT	1997 Oct  4
			2:00	-	EET	2012 Nov 10  2:00
			1:00	Libya	CE%sT	2013 Oct 25  2:00
			2:00	-	EET

# Mauritius

# From Steffen Thorsen (2008-06-25):
# Mauritius plans to observe DST from 2008-11-01 to 2009-03-31 on a trial
# basis....
# It seems that Mauritius observed daylight saving time from 1982-10-10 to
# 1983-03-20 as well, but that was not successful....
# https://www.timeanddate.com/news/time/mauritius-daylight-saving-time.html

# From Alex Krivenyshev (2008-06-25):
# http://economicdevelopment.gov.mu/portal/site/Mainhomepage/menuitem.a42b24128104d9845dabddd154508a0c/?content_id=0a7cee8b5d69a110VgnVCM1000000a04a8c0RCRD

# From Arthur David Olson (2008-06-30):
# The www.timeanddate.com article cited by Steffen Thorsen notes that "A
# final decision has yet to be made on the times that daylight saving
# would begin and end on these dates." As a place holder, use midnight.

# From Paul Eggert (2008-06-30):
# Follow Thorsen on DST in 1982/1983, instead of Shanks & Pottenger.

# From Steffen Thorsen (2008-07-10):
# According to
# http://www.lexpress.mu/display_article.php?news_id=111216
# (in French), Mauritius will start and end their DST a few days earlier
# than previously announced (2008-11-01 to 2009-03-31).  The new start
# date is 2008-10-26 at 02:00 and the new end date is 2009-03-27 (no time
# given, but it is probably at either 2 or 3 wall clock time).
#
# A little strange though, since the article says that they moved the date
# to align itself with Europe and USA which also change time on that date,
# but that means they have not paid attention to what happened in
# USA/Canada last year (DST ends first Sunday in November). I also wonder
# why that they end on a Friday, instead of aligning with Europe which
# changes two days later.

# From Alex Krivenyshev (2008-07-11):
# Seems that English language article "The revival of daylight saving
# time: Energy conservation?"- No. 16578 (07/11/2008) was originally
# published on Monday, June 30, 2008...
#
# I guess that article in French "Le gouvernement avance l'introduction
# de l'heure d'été" stating that DST in Mauritius starting on October 26
# and ending on March 27, 2009 is the most recent one....
# http://www.worldtimezone.com/dst_news/dst_news_mauritius02.html

# From Riad M. Hossen Ally (2008-08-03):
# The Government of Mauritius weblink
# http://www.gov.mu/portal/site/pmosite/menuitem.4ca0efdee47462e7440a600248a521ca/?content_id=4728ca68b2a5b110VgnVCM1000000a04a8c0RCRD
# Cabinet Decision of July 18th, 2008 states as follows:
#
# 4. ...Cabinet has agreed to the introduction into the National Assembly
# of the Time Bill which provides for the introduction of summer time in
# Mauritius. The summer time period which will be of one hour ahead of
# the standard time, will be aligned with that in Europe and the United
# States of America. It will start at two o'clock in the morning on the
# last Sunday of October and will end at two o'clock in the morning on
# the last Sunday of March the following year. The summer time for the
# year 2008-2009 will, therefore, be effective as from 26 October 2008
# and end on 29 March 2009.

# From Ed Maste (2008-10-07):
# THE TIME BILL (No. XXVII of 2008) Explanatory Memorandum states the
# beginning / ending of summer time is 2 o'clock standard time in the
# morning of the last Sunday of October / last Sunday of March.
# http://www.gov.mu/portal/goc/assemblysite/file/bill2708.pdf

# From Steffen Thorsen (2009-06-05):
# According to several sources, Mauritius will not continue to observe
# DST the coming summer...
#
# Some sources, in French:
# http://www.defimedia.info/news/946/Rashid-Beebeejaun-:-«-L%E2%80%99heure-d%E2%80%99été-ne-sera-pas-appliquée-cette-année-»
# http://lexpress.mu/Story/3398~Beebeejaun---Les-objectifs-d-économie-d-énergie-de-l-heure-d-été-ont-été-atteints-
#
# Our wrap-up:
# https://www.timeanddate.com/news/time/mauritius-dst-will-not-repeat.html

# From Arthur David Olson (2009-07-11):
# The "mauritius-dst-will-not-repeat" wrapup includes this:
# "The trial ended on March 29, 2009, when the clocks moved back by one hour
# at 2am (or 02:00) local time..."

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule Mauritius	1982	only	-	Oct	10	0:00	1:00	-
Rule Mauritius	1983	only	-	Mar	21	0:00	0	-
Rule Mauritius	2008	only	-	Oct	lastSun	2:00	1:00	-
Rule Mauritius	2009	only	-	Mar	lastSun	2:00	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Indian/Mauritius	3:50:00 -	LMT	1907 # Port Louis
			4:00 Mauritius	%z
# Agalega Is, Rodriguez
# no information; probably like Indian/Mauritius


# Morocco
# See Africa/Ceuta for Spanish Morocco.

# From Alex Krivenyshev (2008-05-09):
# Here is an article that Morocco plan to introduce Daylight Saving Time between
# 1 June, 2008 and 27 September, 2008.
#
# "... Morocco is to save energy by adjusting its clock during summer so it will
# be one hour ahead of GMT between 1 June and 27 September, according to
# Communication Minister and Government Spokesman, Khalid Naciri...."
#
# http://www.worldtimezone.com/dst_news/dst_news_morocco01.html
# http://en.afrik.com/news11892.html

# From Alex Krivenyshev (2008-05-09):
# The Morocco time change can be confirmed on Morocco web site Maghreb Arabe
# Presse:
# http://www.map.ma/eng/sections/box3/morocco_shifts_to_da/view
#
# Morocco shifts to daylight time on June 1st through September 27, Govt.
# spokesman.

# From Patrice Scattolin (2008-05-09):
# According to this article:
# https://www.avmaroc.com/actualite/heure-dete-comment-a127896.html
# (and republished here: <http://www.actu.ma/heure-dete-comment_i127896_0.html>)
# the changes occur at midnight:
#
# Saturday night May 31st at midnight (which in French is to be
# interpreted as the night between Saturday and Sunday)
# Sunday night the 28th at midnight
#
# Seeing that the 28th is Monday, I am guessing that she intends to say
# the midnight of the 28th which is the midnight between Sunday and
# Monday, which jives with other sources that say that it's inclusive
# June 1st to Sept 27th.
#
# The decision was taken by decree *2-08-224 *but I can't find the decree
# published on the web.
#
# It's also confirmed here:
# http://www.maroc.ma/NR/exeres/FACF141F-D910-44B0-B7FA-6E03733425D1.htm
# on a government portal as being between June 1st and Sept 27th (not yet
# posted in English).
#
# The following Google query will generate many relevant hits:
# https://www.google.com/search?hl=en&q=Conseil+de+gouvernement+maroc+heure+avance&btnG=Search

# From Steffen Thorsen (2008-08-27):
# Morocco will change the clocks back on the midnight between August 31
# and September 1. They originally planned to observe DST to near the end
# of September:
#
# One article about it (in French):
# http://www.menara.ma/fr/Actualites/Maroc/Societe/ci.retour_a_l_heure_gmt_a_partir_du_dimanche_31_aout_a_minuit_officiel_.default
#
# We have some further details posted here:
# https://www.timeanddate.com/news/time/morocco-ends-dst-early-2008.html

# From Steffen Thorsen (2009-03-17):
# Morocco will observe DST from 2009-06-01 00:00 to 2009-08-21 00:00 according
# to many sources, such as
# http://news.marweb.com/morocco/entertainment/morocco-daylight-saving.html
# http://www.medi1sat.ma/fr/depeche.aspx?idp=2312
# (French)
#
# Our summary:
# https://www.timeanddate.com/news/time/morocco-starts-dst-2009.html

# From Alexander Krivenyshev (2009-03-17):
# Here is a link to official document from Royaume du Maroc Premier Ministre,
# Ministère de la Modernisation des Secteurs Publics
#
# Under Article 1 of Royal Decree No. 455-67 of Act 23 safar 1387 (2 June 1967)
# concerning the amendment of the legal time, the Ministry of Modernization of
# Public Sectors announced that the official time in the Kingdom will be
# advanced 60 minutes from Sunday 31 May 2009 at midnight.
#
# http://www.mmsp.gov.ma/francais/Actualites_fr/PDF_Actualites_Fr/HeureEte_FR.pdf
# http://www.worldtimezone.com/dst_news/dst_news_morocco03.html

# From Steffen Thorsen (2010-04-13):
# Several news media in Morocco report that the Ministry of Modernization
# of Public Sectors has announced that Morocco will have DST from
# 2010-05-02 to 2010-08-08.
#
# Example:
# http://www.lavieeco.com/actualites/4099-le-maroc-passera-a-l-heure-d-ete-gmt1-le-2-mai.html
# (French)
# Our page:
# https://www.timeanddate.com/news/time/morocco-starts-dst-2010.html

# From Dan Abitol (2011-03-30):
# ...Rules for Africa/Casablanca are the following (24h format)
# The 3rd April 2011 at 00:00:00, [it] will be 3rd April 01:00:00
# The 31st July 2011 at 00:59:59, [it] will be 31st July 00:00:00
# ...Official links of change in morocco
# The change was broadcast on the FM Radio
# I ve called ANRT (telecom regulations in Morocco) at
# +212.537.71.84.00
# http://www.anrt.net.ma/fr/
# They said that
# http://www.map.ma/fr/sections/accueil/l_heure_legale_au_ma/view
# is the official publication to look at.
# They said that the decision was already taken.
#
# More articles in the press
# https://www.yabiladi.com/articles/details/5058/secret-l-heure-d-ete-maroc-leve.html
# http://www.lematin.ma/Actualite/Express/Article.asp?id=148923
# http://www.lavieeco.com/actualite/Le-Maroc-passe-sur-GMT+1-a-partir-de-dim

# From Petr Machata (2011-03-30):
# They have it written in English here:
# http://www.map.ma/eng/sections/home/morocco_to_spring_fo/view
#
# It says there that "Morocco will resume its standard time on July 31,
# 2011 at midnight." Now they don't say whether they mean midnight of
# wall clock time (i.e. 11pm UTC), but that's what I would assume. It has
# also been like that in the past.

# From Alexander Krivenyshev (2012-03-09):
# According to Infomédiaire web site from Morocco (infomediaire.ma),
# on March 9, 2012, (in French) Heure légale:
# Le Maroc adopte officiellement l'heure d'été
# http://www.infomediaire.ma/news/maroc/heure-légale-le-maroc-adopte-officiellement-lheure-dété
# Governing Council adopted draft decree, that Morocco DST starts on
# the last Sunday of March (March 25, 2012) and ends on
# last Sunday of September (September 30, 2012)
# except the month of Ramadan.
# or (brief)
# http://www.worldtimezone.com/dst_news/dst_news_morocco06.html

# From Arthur David Olson (2012-03-10):
# The infomediaire.ma source indicates that the system is to be in
# effect every year. It gives 03H00 as the "fall back" time of day;
# it lacks a "spring forward" time of day; assume 2:00 XXX.
# Wait on specifying the Ramadan exception for details about
# start date, start time of day, end date, and end time of day XXX.

# From Christophe Tropamer (2012-03-16):
# Seen Morocco change again:
# http://www.le2uminutes.com/actualite.php
# "...à partir du dernier dimanche d'avril et non fins mars,
# comme annoncé précédemment."

# From Milamber Space Network (2012-07-17):
# The official return to GMT is announced by the Moroccan government:
# http://www.mmsp.gov.ma/fr/actualites.aspx?id=288 [in French]
#
# Google translation, lightly edited:
# Back to the standard time of the Kingdom (GMT)
# Pursuant to Decree No. 2-12-126 issued on 26 Jumada (I) 1433 (April 18,
# 2012) and in accordance with the order of Mr. President of the
# Government No. 3-47-12 issued on 24 Sha'ban (11 July 2012), the Ministry
# of Public Service and Administration Modernization announces the return
# of the legal time of the Kingdom (GMT) from Friday, July 20, 2012 until
# Monday, August 20, 2012.  So the time will be delayed by 60 minutes from
# 3:00 am Friday, July 20, 2012 and will again be advanced by 60 minutes
# August 20, 2012 from 2:00 am.

# From Paul Eggert (2013-03-06):
# Morocco's daylight-saving transitions due to Ramadan seem to be
# announced a bit in advance.  On 2012-07-11 the Moroccan government
# announced that year's Ramadan daylight-saving transitions would be
# 2012-07-20 and 2012-08-20; see
# http://www.mmsp.gov.ma/fr/actualites.aspx?id=288

# From Andrew Paprocki (2013-07-02):
# Morocco announced that the year's Ramadan daylight-savings
# transitions would be 2013-07-07 and 2013-08-10; see:
# http://www.maroc.ma/en/news/morocco-suspends-daylight-saving-time-july-7-aug10

# From Steffen Thorsen (2013-09-28):
# Morocco extends DST by one month, on very short notice, just 1 day
# before it was going to end.  There is a new decree (2.13.781) for
# this, where DST from now on goes from last Sunday of March at 02:00
# to last Sunday of October at 03:00, similar to EU rules.  Official
# source (French):
# http://www.maroc.gov.ma/fr/actualites/lhoraire-dete-gmt1-maintenu-jusquau-27-octobre-2013
# Another source (specifying the time for start and end in the decree):
# http://www.lemag.ma/Heure-d-ete-au-Maroc-jusqu-au-27-octobre_a75620.html

# From Sebastien Willemijns (2014-03-18):
# http://www.afriquinfos.com/articles/2014/3/18/maroc-heure-dete-avancez-tous-horloges-247891.asp

# From Milamber Space Network (2014-06-05):
# The Moroccan government has recently announced that the country will return
# to standard time at 03:00 on Saturday, June 28, 2014 local time....  DST
# will resume again at 02:00 on Saturday, August 2, 2014....
# http://www.mmsp.gov.ma/fr/actualites.aspx?id=586

# From Milamber (2015-06-08):
# (Google Translation) The hour will thus be delayed 60 minutes
# Sunday, June 14 at 3:00, the ministry said in a statement, adding
# that the time will be advanced again 60 minutes Sunday, July 19,
# 2015 at 2:00.  The move comes under 2.12.126 Decree of 26 Jumada I
# 1433 (18 April 2012) and the decision of the Head of Government of
# 16 N. 3-29-15 Chaaban 1435 (4 June 2015).
# Source (french):
# https://lnt.ma/le-maroc-reculera-dune-heure-le-dimanche-14-juin/
#
# From Milamber (2015-06-09):
# http://www.mmsp.gov.ma/fr/actualites.aspx?id=863
#
# From Michael Deckers (2015-06-09):
# [The gov.ma announcement] would (probably) make the switch on 2015-07-19 go
# from 03:00 to 04:00 rather than from 02:00 to 03:00, as in the patch....
# I think the patch is correct and the quoted text is wrong; the text in
# <https://lnt.ma/le-maroc-reculera-dune-heure-le-dimanche-14-juin/> agrees
# with the patch.

# From Mohamed Essedik Najd (2018-10-26):
# Today, a Moroccan government council approved the perpetual addition
# of 60 minutes to the regular Moroccan timezone.
# From Matt Johnson (2018-10-28):
# http://www.sgg.gov.ma/Portals/1/BO/2018/BO_6720-bis_Ar.pdf
#
# From Maamar Abdelkader (2018-11-01):
# We usually move clocks back the previous week end and come back to the +1
# the week end after....  The government does not announce yet the decision
# about this temporary change.  But it s 99% sure that it will be the case,
# as in previous years.  An unofficial survey was done these days, showing
# that 64% of asked people are ok for moving from +1 to +0 during Ramadan.
# https://leconomiste.com/article/1035870-enquete-l-economiste-sunergia-64-des-marocains-plebiscitent-le-gmt-pendant-ramadan

# From Naoufal Semlali (2019-04-16):
# Morocco will be on GMT starting from Sunday, May 5th 2019 at 3am.
# The switch to GMT+1 will occur on Sunday, June 9th 2019 at 2am....
# http://fr.le360.ma/societe/voici-la-date-du-retour-a-lheure-legale-au-maroc-188222

# From Semlali Naoufal (2020-04-14):
# Following the announcement by the Moroccan government, the switch to
# GMT time will take place on Sunday, April 19, 2020 from 3 a.m. and
# the return to GMT+1 time will take place on Sunday, May 31, 2020 at 2 a.m....
# https://maroc-diplomatique.net/maroc-le-retour-a-lheure-gmt-est-prevu-dimanche-prochain/
# http://aujourdhui.ma/actualite/gmt1-retour-a-lheure-normale-dimanche-prochain-1
#
# From Milamber (2020-05-31)
# In Morocco (where I live), the end of Ramadan (Arabic month) is followed by
# the Eid al-Fitr, and concretely it's 1 or 2 day offs for the people (with
# traditional visiting of family, big lunches/dinners, etc.).  So for this
# year the astronomical calculations don't include the following 2 days off in
# the calc.  These 2 days fall in a Sunday/Monday, so it's not acceptable by
# people to have a time shift during these 2 days off.  Perhaps you can modify
# the (predicted) rules for next years: if the end of Ramadan is a (probable)
# Friday or Saturday (and so the 2 days off are on a weekend), the next time
# shift will be the next weekend.
#
# From Milamber (2021-03-31, 2022-03-10):
# https://www.mmsp.gov.ma/fr/actualites.aspx?id=2076
# https://www.ecoactu.ma/horaires-administration-ramadan-gmtheure-gmt-a-partir-de-dimanche-27-mars/
#
# From Milamber (2023-03-14, 2023-03-15):
# The return to legal GMT time will take place this Sunday, March 19 at 3 a.m.
# ... the return to GMT+1 will be made on Sunday April 23, 2023 at 2 a.m.
# https://www.mmsp.gov.ma/fr/actualites/passage-à-l%E2%80%99heure-gmt-à-partir-du-dimanche-19-mars-2023
#
# From Paul Eggert (2023-03-14):
# For now, guess that in the future Morocco will fall back at 03:00
# the last Sunday before Ramadan, and spring forward at 02:00 the
# first Sunday after one day after Ramadan.  To implement this,
# transition dates and times for 2019 through 2087 were determined by
# running the following program under GNU Emacs 28.2.  (This algorithm
# also produces the correct transition dates for 2016 through 2018,
# though the times differ due to Morocco's time zone change in 2018.)
# (let ((islamic-year 1440))
#   (require 'cal-islam)
#   (while (< islamic-year 1511)
#     (let ((a (calendar-islamic-to-absolute (list 9 1 islamic-year)))
#           (b (+ 1 (calendar-islamic-to-absolute (list 10 1 islamic-year))))
#           (sunday 0))
#       (while (/= sunday (mod (setq a (1- a)) 7)))
#       (while (/= sunday (mod b 7))
#         (setq b (1+ b)))
#       (setq a (calendar-gregorian-from-absolute a))
#       (setq b (calendar-gregorian-from-absolute b))
#       (insert
#        (format
#         (concat "Rule\tMorocco\t%d\tonly\t-\t%s\t%2d\t 3:00\t-1:00\t-\n"
#                 "Rule\tMorocco\t%d\tonly\t-\t%s\t%2d\t 2:00\t0\t-\n")
#         (car (cdr (cdr a))) (calendar-month-name (car a) t) (car (cdr a))
#         (car (cdr (cdr b))) (calendar-month-name (car b) t) (car (cdr b)))))
#     (setq islamic-year (+ 1 islamic-year))))

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Morocco	1939	only	-	Sep	12	 0:00	1:00	-
Rule	Morocco	1939	only	-	Nov	19	 0:00	0	-
Rule	Morocco	1940	only	-	Feb	25	 0:00	1:00	-
Rule	Morocco	1945	only	-	Nov	18	 0:00	0	-
Rule	Morocco	1950	only	-	Jun	11	 0:00	1:00	-
Rule	Morocco	1950	only	-	Oct	29	 0:00	0	-
Rule	Morocco	1967	only	-	Jun	 3	12:00	1:00	-
Rule	Morocco	1967	only	-	Oct	 1	 0:00	0	-
Rule	Morocco	1974	only	-	Jun	24	 0:00	1:00	-
Rule	Morocco	1974	only	-	Sep	 1	 0:00	0	-
Rule	Morocco	1976	1977	-	May	 1	 0:00	1:00	-
Rule	Morocco	1976	only	-	Aug	 1	 0:00	0	-
Rule	Morocco	1977	only	-	Sep	28	 0:00	0	-
Rule	Morocco	1978	only	-	Jun	 1	 0:00	1:00	-
Rule	Morocco	1978	only	-	Aug	 4	 0:00	0	-
Rule	Morocco	2008	only	-	Jun	 1	 0:00	1:00	-
Rule	Morocco	2008	only	-	Sep	 1	 0:00	0	-
Rule	Morocco	2009	only	-	Jun	 1	 0:00	1:00	-
Rule	Morocco	2009	only	-	Aug	21	 0:00	0	-
Rule	Morocco	2010	only	-	May	 2	 0:00	1:00	-
Rule	Morocco	2010	only	-	Aug	 8	 0:00	0	-
Rule	Morocco	2011	only	-	Apr	 3	 0:00	1:00	-
Rule	Morocco	2011	only	-	Jul	31	 0:00	0	-
Rule	Morocco	2012	2013	-	Apr	lastSun	 2:00	1:00	-
Rule	Morocco	2012	only	-	Jul	20	 3:00	0	-
Rule	Morocco	2012	only	-	Aug	20	 2:00	1:00	-
Rule	Morocco	2012	only	-	Sep	30	 3:00	0	-
Rule	Morocco	2013	only	-	Jul	 7	 3:00	0	-
Rule	Morocco	2013	only	-	Aug	10	 2:00	1:00	-
Rule	Morocco	2013	2018	-	Oct	lastSun	 3:00	0	-
Rule	Morocco	2014	2018	-	Mar	lastSun	 2:00	1:00	-
Rule	Morocco	2014	only	-	Jun	28	 3:00	0	-
Rule	Morocco	2014	only	-	Aug	 2	 2:00	1:00	-
Rule	Morocco	2015	only	-	Jun	14	 3:00	0	-
Rule	Morocco	2015	only	-	Jul	19	 2:00	1:00	-
Rule	Morocco	2016	only	-	Jun	 5	 3:00	0	-
Rule	Morocco	2016	only	-	Jul	10	 2:00	1:00	-
Rule	Morocco	2017	only	-	May	21	 3:00	0	-
Rule	Morocco	2017	only	-	Jul	 2	 2:00	1:00	-
Rule	Morocco	2018	only	-	May	13	 3:00	0	-
Rule	Morocco	2018	only	-	Jun	17	 2:00	1:00	-
Rule	Morocco	2019	only	-	May	 5	 3:00	-1:00	-
Rule	Morocco	2019	only	-	Jun	 9	 2:00	0	-
Rule	Morocco	2020	only	-	Apr	19	 3:00	-1:00	-
Rule	Morocco	2020	only	-	May	31	 2:00	0	-
Rule	Morocco	2021	only	-	Apr	11	 3:00	-1:00	-
Rule	Morocco	2021	only	-	May	16	 2:00	0	-
Rule	Morocco	2022	only	-	Mar	27	 3:00	-1:00	-
Rule	Morocco	2022	only	-	May	 8	 2:00	0	-
Rule	Morocco	2023	only	-	Mar	19	 3:00	-1:00	-
Rule	Morocco	2023	only	-	Apr	23	 2:00	0	-
Rule	Morocco	2024	only	-	Mar	10	 3:00	-1:00	-
Rule	Morocco	2024	only	-	Apr	14	 2:00	0	-
Rule	Morocco	2025	only	-	Feb	23	 3:00	-1:00	-
Rule	Morocco	2025	only	-	Apr	 6	 2:00	0	-
Rule	Morocco	2026	only	-	Feb	15	 3:00	-1:00	-
Rule	Morocco	2026	only	-	Mar	22	 2:00	0	-
Rule	Morocco	2027	only	-	Feb	 7	 3:00	-1:00	-
Rule	Morocco	2027	only	-	Mar	14	 2:00	0	-
Rule	Morocco	2028	only	-	Jan	23	 3:00	-1:00	-
Rule	Morocco	2028	only	-	Mar	 5	 2:00	0	-
Rule	Morocco	2029	only	-	Jan	14	 3:00	-1:00	-
Rule	Morocco	2029	only	-	Feb	18	 2:00	0	-
Rule	Morocco	2029	only	-	Dec	30	 3:00	-1:00	-
Rule	Morocco	2030	only	-	Feb	10	 2:00	0	-
Rule	Morocco	2030	only	-	Dec	22	 3:00	-1:00	-
Rule	Morocco	2031	only	-	Jan	26	 2:00	0	-
Rule	Morocco	2031	only	-	Dec	14	 3:00	-1:00	-
Rule	Morocco	2032	only	-	Jan	18	 2:00	0	-
Rule	Morocco	2032	only	-	Nov	28	 3:00	-1:00	-
Rule	Morocco	2033	only	-	Jan	 9	 2:00	0	-
Rule	Morocco	2033	only	-	Nov	20	 3:00	-1:00	-
Rule	Morocco	2033	only	-	Dec	25	 2:00	0	-
Rule	Morocco	2034	only	-	Nov	 5	 3:00	-1:00	-
Rule	Morocco	2034	only	-	Dec	17	 2:00	0	-
Rule	Morocco	2035	only	-	Oct	28	 3:00	-1:00	-
Rule	Morocco	2035	only	-	Dec	 9	 2:00	0	-
Rule	Morocco	2036	only	-	Oct	19	 3:00	-1:00	-
Rule	Morocco	2036	only	-	Nov	23	 2:00	0	-
Rule	Morocco	2037	only	-	Oct	 4	 3:00	-1:00	-
Rule	Morocco	2037	only	-	Nov	15	 2:00	0	-
Rule	Morocco	2038	only	-	Sep	26	 3:00	-1:00	-
Rule	Morocco	2038	only	-	Oct	31	 2:00	0	-
Rule	Morocco	2039	only	-	Sep	18	 3:00	-1:00	-
Rule	Morocco	2039	only	-	Oct	23	 2:00	0	-
Rule	Morocco	2040	only	-	Sep	 2	 3:00	-1:00	-
Rule	Morocco	2040	only	-	Oct	14	 2:00	0	-
Rule	Morocco	2041	only	-	Aug	25	 3:00	-1:00	-
Rule	Morocco	2041	only	-	Sep	29	 2:00	0	-
Rule	Morocco	2042	only	-	Aug	10	 3:00	-1:00	-
Rule	Morocco	2042	only	-	Sep	21	 2:00	0	-
Rule	Morocco	2043	only	-	Aug	 2	 3:00	-1:00	-
Rule	Morocco	2043	only	-	Sep	13	 2:00	0	-
Rule	Morocco	2044	only	-	Jul	24	 3:00	-1:00	-
Rule	Morocco	2044	only	-	Aug	28	 2:00	0	-
Rule	Morocco	2045	only	-	Jul	 9	 3:00	-1:00	-
Rule	Morocco	2045	only	-	Aug	20	 2:00	0	-
Rule	Morocco	2046	only	-	Jul	 1	 3:00	-1:00	-
Rule	Morocco	2046	only	-	Aug	 5	 2:00	0	-
Rule	Morocco	2047	only	-	Jun	23	 3:00	-1:00	-
Rule	Morocco	2047	only	-	Jul	28	 2:00	0	-
Rule	Morocco	2048	only	-	Jun	 7	 3:00	-1:00	-
Rule	Morocco	2048	only	-	Jul	19	 2:00	0	-
Rule	Morocco	2049	only	-	May	30	 3:00	-1:00	-
Rule	Morocco	2049	only	-	Jul	 4	 2:00	0	-
Rule	Morocco	2050	only	-	May	15	 3:00	-1:00	-
Rule	Morocco	2050	only	-	Jun	26	 2:00	0	-
Rule	Morocco	2051	only	-	May	 7	 3:00	-1:00	-
Rule	Morocco	2051	only	-	Jun	18	 2:00	0	-
Rule	Morocco	2052	only	-	Apr	28	 3:00	-1:00	-
Rule	Morocco	2052	only	-	Jun	 2	 2:00	0	-
Rule	Morocco	2053	only	-	Apr	13	 3:00	-1:00	-
Rule	Morocco	2053	only	-	May	25	 2:00	0	-
Rule	Morocco	2054	only	-	Apr	 5	 3:00	-1:00	-
Rule	Morocco	2054	only	-	May	10	 2:00	0	-
Rule	Morocco	2055	only	-	Mar	28	 3:00	-1:00	-
Rule	Morocco	2055	only	-	May	 2	 2:00	0	-
Rule	Morocco	2056	only	-	Mar	12	 3:00	-1:00	-
Rule	Morocco	2056	only	-	Apr	23	 2:00	0	-
Rule	Morocco	2057	only	-	Mar	 4	 3:00	-1:00	-
Rule	Morocco	2057	only	-	Apr	 8	 2:00	0	-
Rule	Morocco	2058	only	-	Feb	17	 3:00	-1:00	-
Rule	Morocco	2058	only	-	Mar	31	 2:00	0	-
Rule	Morocco	2059	only	-	Feb	 9	 3:00	-1:00	-
Rule	Morocco	2059	only	-	Mar	23	 2:00	0	-
Rule	Morocco	2060	only	-	Feb	 1	 3:00	-1:00	-
Rule	Morocco	2060	only	-	Mar	 7	 2:00	0	-
Rule	Morocco	2061	only	-	Jan	16	 3:00	-1:00	-
Rule	Morocco	2061	only	-	Feb	27	 2:00	0	-
Rule	Morocco	2062	only	-	Jan	 8	 3:00	-1:00	-
Rule	Morocco	2062	only	-	Feb	12	 2:00	0	-
Rule	Morocco	2062	only	-	Dec	31	 3:00	-1:00	-
Rule	Morocco	2063	only	-	Feb	 4	 2:00	0	-
Rule	Morocco	2063	only	-	Dec	16	 3:00	-1:00	-
Rule	Morocco	2064	only	-	Jan	27	 2:00	0	-
Rule	Morocco	2064	only	-	Dec	 7	 3:00	-1:00	-
Rule	Morocco	2065	only	-	Jan	11	 2:00	0	-
Rule	Morocco	2065	only	-	Nov	22	 3:00	-1:00	-
Rule	Morocco	2066	only	-	Jan	 3	 2:00	0	-
Rule	Morocco	2066	only	-	Nov	14	 3:00	-1:00	-
Rule	Morocco	2066	only	-	Dec	26	 2:00	0	-
Rule	Morocco	2067	only	-	Nov	 6	 3:00	-1:00	-
Rule	Morocco	2067	only	-	Dec	11	 2:00	0	-
Rule	Morocco	2068	only	-	Oct	21	 3:00	-1:00	-
Rule	Morocco	2068	only	-	Dec	 2	 2:00	0	-
Rule	Morocco	2069	only	-	Oct	13	 3:00	-1:00	-
Rule	Morocco	2069	only	-	Nov	17	 2:00	0	-
Rule	Morocco	2070	only	-	Oct	 5	 3:00	-1:00	-
Rule	Morocco	2070	only	-	Nov	 9	 2:00	0	-
Rule	Morocco	2071	only	-	Sep	20	 3:00	-1:00	-
Rule	Morocco	2071	only	-	Nov	 1	 2:00	0	-
Rule	Morocco	2072	only	-	Sep	11	 3:00	-1:00	-
Rule	Morocco	2072	only	-	Oct	16	 2:00	0	-
Rule	Morocco	2073	only	-	Aug	27	 3:00	-1:00	-
Rule	Morocco	2073	only	-	Oct	 8	 2:00	0	-
Rule	Morocco	2074	only	-	Aug	19	 3:00	-1:00	-
Rule	Morocco	2074	only	-	Sep	30	 2:00	0	-
Rule	Morocco	2075	only	-	Aug	11	 3:00	-1:00	-
Rule	Morocco	2075	only	-	Sep	15	 2:00	0	-
Rule	Morocco	2076	only	-	Jul	26	 3:00	-1:00	-
Rule	Morocco	2076	only	-	Sep	 6	 2:00	0	-
Rule	Morocco	2077	only	-	Jul	18	 3:00	-1:00	-
Rule	Morocco	2077	only	-	Aug	22	 2:00	0	-
Rule	Morocco	2078	only	-	Jul	10	 3:00	-1:00	-
Rule	Morocco	2078	only	-	Aug	14	 2:00	0	-
Rule	Morocco	2079	only	-	Jun	25	 3:00	-1:00	-
Rule	Morocco	2079	only	-	Aug	 6	 2:00	0	-
Rule	Morocco	2080	only	-	Jun	16	 3:00	-1:00	-
Rule	Morocco	2080	only	-	Jul	21	 2:00	0	-
Rule	Morocco	2081	only	-	Jun	 1	 3:00	-1:00	-
Rule	Morocco	2081	only	-	Jul	13	 2:00	0	-
Rule	Morocco	2082	only	-	May	24	 3:00	-1:00	-
Rule	Morocco	2082	only	-	Jun	28	 2:00	0	-
Rule	Morocco	2083	only	-	May	16	 3:00	-1:00	-
Rule	Morocco	2083	only	-	Jun	20	 2:00	0	-
Rule	Morocco	2084	only	-	Apr	30	 3:00	-1:00	-
Rule	Morocco	2084	only	-	Jun	11	 2:00	0	-
Rule	Morocco	2085	only	-	Apr	22	 3:00	-1:00	-
Rule	Morocco	2085	only	-	May	27	 2:00	0	-
Rule	Morocco	2086	only	-	Apr	14	 3:00	-1:00	-
Rule	Morocco	2086	only	-	May	19	 2:00	0	-
Rule	Morocco	2087	only	-	Mar	30	 3:00	-1:00	-
Rule	Morocco	2087	only	-	May	11	 2:00	0	-
# For dates after the somewhat-arbitrary cutoff of 2087, assume that
# Morocco will no longer observe DST.  At some point this table will
# need to be extended, though quite possibly Morocco will change the
# rules first.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Africa/Casablanca	-0:30:20 -	LMT	1913 Oct 26
			 0:00	Morocco	%z	1984 Mar 16
			 1:00	-	%z	1986
			 0:00	Morocco	%z	2018 Oct 28  3:00
			 1:00	Morocco	%z

# Western Sahara
#
# From Gwillim Law (2013-10-22):
# A correspondent who is usually well informed about time zone matters
# ... says that Western Sahara observes daylight saving time, just as
# Morocco does.
#
# From Paul Eggert (2013-10-23):
# Assume that this has been true since Western Sahara switched to GMT,
# since most of it was then controlled by Morocco.

Zone Africa/El_Aaiun	-0:52:48 -	LMT	1934 Jan # El Aaiún
			-1:00	-	%z	1976 Apr 14
			 0:00	Morocco	%z	2018 Oct 28  3:00
			 1:00	Morocco	%z

# Botswana
# Burundi
# Democratic Republic of the Congo (eastern)
# Malawi
# Mozambique
# Rwanda
# Zambia
# Zimbabwe
#
# From Tim Parenti (2024-07-01):
# For timestamps before Mozambique's independence, see commentary for
# Europe/Lisbon.
#
# From Paul Eggert (2024-05-24):
# The London Gazette, 1903-04-03, page 2245, says that
# as of 1903-03-03 a time ball at the port of Lourenço Marques
# (as Maputo was then called) was dropped daily at 13:00:00 LMT,
# corresponding to 22:49:41.7 GMT, so local time was +02:10:18.3.
# Conversely, the newspaper South Africa, 1909-02-09, page 321,
# says the port had just installed an apparatus that communicated
# "from the controlling clock in the new Observatory at Reuben Point ...
# exact mean South African time, i.e., 30 deg., or 2 hours East of Greenwich".
# Although Shanks gives 1903-03-01 for the transition to CAT,
# evidently the port transitioned to CAT after 1903-03-03 but before
# the Portuguese legal transition of 1912-01-01 (see Europe/Lisbon commentary).
# For lack of better info, list 1909 as the transition date.
#
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
		#STDOFF	2:10:18.3
Zone	Africa/Maputo	2:10:18 -	LMT	1909
			2:00	-	CAT

# Namibia

# From Arthur David Olson (2017-08-09):
# The text of the "Namibia Time Act, 1994" is available online at
# www.lac.org.na/laws/1994/811.pdf
# and includes this nugget:
# Notwithstanding the provisions of subsection (2) of section 1, the
# first winter period after the commencement of this Act shall
# commence at OOhOO on Monday 21 March 1994 and shall end at 02h00 on
# Sunday 4 September 1994.

# From Michael Deckers (2017-04-06):
# ... both summer and winter time are called "standard"
# (which differs from the use in Ireland) ...

# From Petronella Sibeene (2007-03-30):
# http://allafrica.com/stories/200703300178.html
# While the entire country changes its time, Katima Mulilo and other
# settlements in Caprivi unofficially will not because the sun there
# rises and sets earlier compared to other regions.  Chief of
# Forecasting Riaan van Zyl explained that the far eastern parts of
# the country are close to 40 minutes earlier in sunrise than the rest
# of the country.
#
# From Paul Eggert (2017-02-22):
# Although the Zambezi Region (formerly known as Caprivi) informally
# observes Botswana time, we have no details about historical practice.
# In the meantime people there can use Africa/Gaborone.
# See: Immanuel S. The Namibian. 2017-02-23.
# https://www.namibian.com.na/51480/read/Time-change-divides-lawmakers

# From Steffen Thorsen (2017-08-09):
# Namibia is going to change their time zone to what is now their DST:
# https://www.newera.com.na/2017/02/23/namibias-winter-time-might-be-repealed/
# This video is from the government decision:
# https://www.nbc.na/news/na-passes-namibia-time-bill-repealing-1994-namibia-time-act.8665
# We have made the assumption so far that they will change their time zone at
# the same time they would normally start DST, the first Sunday in September:
# https://www.timeanddate.com/news/time/namibia-new-time-zone.html

# From Paul Eggert (2017-04-09):
# Before the change, summer and winter time were both standard time legally.
# However in common parlance, winter time was considered to be DST.  See, e.g.:
# http://www.nbc.na/news/namibias-winter-time-could-be-scrapped.2706
# https://zone.my.na/news/times-are-changing-in-namibia
# https://www.newera.com.na/2017/02/23/namibias-winter-time-might-be-repealed/
# Use plain "WAT" and "CAT" for the time zone abbreviations, to be compatible
# with Namibia's neighbors.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
# Vanguard section, for zic and other parsers that support negative DST.
Rule	Namibia	1994	only	-	Mar	21	0:00	-1:00	WAT
Rule	Namibia	1994	2017	-	Sep	Sun>=1	2:00	0	CAT
Rule	Namibia	1995	2017	-	Apr	Sun>=1	2:00	-1:00	WAT
# Rearguard section, for parsers lacking negative DST; see ziguard.awk.
#Rule	Namibia	1994	only	-	Mar	21	0:00	0	WAT
#Rule	Namibia	1994	2017	-	Sep	Sun>=1	2:00	1:00	CAT
#Rule	Namibia	1995	2017	-	Apr	Sun>=1	2:00	0	WAT
# End of rearguard section.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Africa/Windhoek	1:08:24 -	LMT	1892 Feb 8
			1:30	-	%z	1903 Mar
			2:00	-	SAST	1942 Sep 20  2:00
			2:00	1:00	SAST	1943 Mar 21  2:00
			2:00	-	SAST	1990 Mar 21 # independence
# Vanguard section, for zic and other parsers that support negative DST.
			2:00	Namibia	%s
# Rearguard section, for parsers lacking negative DST; see ziguard.awk.
#			2:00	-	CAT	1994 Mar 21  0:00
# From Paul Eggert (2017-04-07):
# The official date of the 2017 rule change was 2017-10-24.  See:
# http://www.lac.org.na/laws/annoSTAT/Namibian%20Time%20Act%209%20of%202017.pdf
#			1:00	Namibia	%s	2017 Oct 24
#			2:00	-	CAT
# End of rearguard section.


# Angola
# Benin
# Cameroon
# Central African Republic
# Democratic Republic of the Congo (western)
# Republic of the Congo
# Equatorial Guinea
# Gabon
# Niger
# Nigeria

# From P Chan (2020-12-03):
# GMT was adopted as the standard time of Lagos on 1905-07-01.
# Lagos Weekly Record, 1905-06-24, p 3
# http://ddsnext.crl.edu/titles/31558#?c=0&m=668&s=0&cv=2&r=0&xywh=1446,5221,1931,1235
# says "It is officially notified that on and after the 1st of July 1905
# Greenwich Mean Solar Time will be adopted throughout the Colony and
# Protectorate, and that it will be necessary to put all clocks 13 minutes and
# 35 seconds back, recording local mean time."
#
# It seemed that Lagos returned to LMT on 1908-07-01.
# [The Lagos Standard], 1908-07-01, p 5
# http://ddsnext.crl.edu/titles/31556#?c=0&m=78&s=0&cv=4&r=0&xywh=-92,3590,3944,2523
# says "Scarcely have the people become accustomed to this new time, when
# another official notice has now appeared announcing that from and after the
# 1st July next, return will be made to local mean time."
#
# From P Chan (2020-11-27):
# On 1914-01-01, standard time of GMT+0:30 was adopted for the unified Nigeria.
# Colonial Reports - Annual. No. 878. Nigeria. Report for 1914. (April 1916),
# p 27
# https://libsysdigi.library.illinois.edu/ilharvest/Africana/Books2011-05/3064634/3064634_1914/3064634_1914_opt.pdf#page=27
# "On January 1st [1914], a universal standard time for Nigeria was adopted,
# viz., half an hour fast on Greenwich mean time, corresponding to the meridian
# 7° 30' E. long."
# Lloyd's Register of Shipping (1915) says "Hitherto the time observed in Lagos
# was the local mean time. On 1st January, 1914, standard time for the whole of
# Nigeria was introduced ... Lagos time has been advanced about 16 minutes
# accordingly."
#
# In 1919, standard time was changed to GMT+1.
# Interpretation Ordinance (Cap 2)
# The Laws of Nigeria, Containing the Ordinances of Nigeria, in Force on the
# 1st Day of January, 1923, Vol.I [p 16]
# https://books.google.com/books?id=BOMrAQAAMAAJ&pg=PA16
# "The expression 'Standard time' means standard time as used in Nigeria:
# namely, 60 minutes in advance of Greenwich mean time.  (As amended by 18 of
# 1919, s. 2.)"
# From Tim Parenti (2020-12-10):
# The Lagos Weekly Record, 1919-09-20, p 3 details discussion on the first
# reading of this Bill by the Legislative Council of the Colony of Nigeria on
# Thursday 1919-08-28:
# http://ddsnext.crl.edu/titles/31558?terms&item_id=303484#?m=1118&c=1&s=0&cv=2&r=0&xywh=1261,3408,2994,1915
# "The proposal is that the Globe should be divided into twelve zones East and
# West of Greenwich, of one hour each, Nigeria falling into the zone with a
# standard of one hour fast on Greenwich Mean Time.  Nigeria standard time is
# now 30 minutes in advance of Greenwich Mean Time ... according to the new
# proposal, standard time will be advanced another 30 minutes".  It was further
# proposed that the firing of the time guns likewise be adjusted by 30 minutes
# to compensate.
# From Tim Parenti (2020-12-10), per P Chan (2020-12-11):
# The text of Ordinance 18 of 1919, published in Nigeria Gazette, Vol 6, No 52,
# shows that the change was assented to the following day and took effect "on
# the 1st day of September, 1919."
# Nigeria Gazette and Supplements 1919 Jan-Dec, Reference: 73266B-40,
# img 245-246
# https://microform.digital/boa/collections/77/volumes/539/nigeria-lagos-1887-1919

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Africa/Lagos	0:13:35 -	LMT	1905 Jul  1
			0:00	-	GMT	1908 Jul  1
			0:13:35	-	LMT	1914 Jan  1
			0:30	-	%z	1919 Sep  1
			1:00	-	WAT

# São Tomé and Príncipe

# See Europe/Lisbon for info about the 1912 transition.

# From Steffen Thorsen (2018-01-08):
# Multiple sources tell that São Tomé changed from UTC to UTC+1 as
# they entered the year 2018.
# From Michael Deckers (2018-01-08):
# the switch is from 01:00 to 02:00 ... [Decree No. 25/2017]
# http://www.mnec.gov.st/index.php/publicacoes/documentos/file/90-decreto-lei-n-25-2017

# From Vadim Nasardinov (2018-12-29):
# São Tomé and Príncipe is about to do the following on Jan 1, 2019:
# https://www.stp-press.st/2018/12/05/governo-jesus-ja-decidiu-repor-hora-legal-sao-tomense/
#
# From Michael Deckers (2018-12-30):
# https://www.legis-palop.org/download.jsp?idFile=102818
# ... [The legal time of the country, which coincides with universal
# coordinated time, will be reinstituted at 2 o'clock on day 1 of January, 2019.]

Zone	Africa/Sao_Tome	 0:26:56 -	LMT	1884
		#STDOFF	-0:36:44.68
			-0:36:45 -	LMT	1912 Jan  1 00:00u # Lisbon MT
			 0:00	-	GMT	2018 Jan  1 01:00
			 1:00	-	WAT	2019 Jan  1 02:00
			 0:00	-	GMT

# Eswatini (Swaziland)
# Lesotho
# South Africa

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	SA	1942	1943	-	Sep	Sun>=15	2:00	1:00	-
Rule	SA	1943	1944	-	Mar	Sun>=15	2:00	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Africa/Johannesburg 1:52:00 -	LMT	1892 Feb 8
			1:30	-	SAST	1903 Mar
			2:00	SA	SAST
#
# Marion and Prince Edward Is
# scientific station since 1947
# no information

# Sudan

# From <http://www.sunanews.net/sn13jane.html>
# Sudan News Agency (2000-01-13),
# also reported by Michaël De Beukelaer-Dossche via Steffen Thorsen:
# Clocks will be moved ahead for 60 minutes all over the Sudan as of noon
# Saturday....  This was announced Thursday by Caretaker State Minister for
# Manpower Abdul-Rahman Nur-Eddin.

# From Ahmed Atyya, National Telecommunications Corp. (NTC), Sudan (2017-10-17):
# ... the Republic of Sudan is going to change the time zone from (GMT+3:00)
# to (GMT+ 2:00) starting from Wednesday 1 November 2017.
#
# From Paul Eggert (2017-10-18):
# A scanned copy (in Arabic) of Cabinet Resolution No. 352 for the
# year 2017 can be found as an attachment in email today from Yahia
# Abdalla of NTC, archived at:
# https://mm.icann.org/pipermail/tz/2017-October/025333.html

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Sudan	1970	only	-	May	 1	0:00	1:00	S
Rule	Sudan	1970	1985	-	Oct	15	0:00	0	-
Rule	Sudan	1971	only	-	Apr	30	0:00	1:00	S
Rule	Sudan	1972	1985	-	Apr	lastSun	0:00	1:00	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Africa/Khartoum	2:10:08 -	LMT	1931
			2:00	Sudan	CA%sT	2000 Jan 15 12:00
			3:00	-	EAT	2017 Nov  1
			2:00	-	CAT

# South Sudan

# From Steffen Thorsen (2021-01-18):
# "South Sudan will change its time zone by setting the clock back 1
# hour on February 1, 2021...."
# from https://eyeradio.org/south-sudan-adopts-new-time-zone-makuei/

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Africa/Juba	2:06:28 -	LMT	1931
			2:00	Sudan	CA%sT	2000 Jan 15 12:00
			3:00	-	EAT	2021 Feb  1 00:00
			2:00	-	CAT

# Tunisia

# From Gwillim Law (2005-04-30):
# My correspondent, Risto Nykänen, has alerted me to another adoption of DST,
# this time in Tunisia.  According to Yahoo France News
# <http://fr.news.yahoo.com/050426/5/4dumk.html>, in a story attributed to AP
# and dated 2005-04-26, "Tunisia has decided to advance its official time by
# one hour, starting on Sunday, May 1.  Henceforth, Tunisian time will be
# UTC+2 instead of UTC+1.  The change will take place at 23:00 UTC next
# Saturday."  (My translation)
#
# From Oscar van Vlijmen (2005-05-02):
# La Presse, the first national daily newspaper ...
# http://www.lapresse.tn/archives/archives280405/actualites/lheure.html
# ... DST for 2005: on: Sun May 1 0h standard time, off: Fri Sept. 30,
# 1h standard time.
#
# From Atef Loukil (2006-03-28):
# The daylight saving time will be the same each year:
# Beginning      : the last Sunday of March at 02:00
# Ending         : the last Sunday of October at 03:00 ...
# http://www.tap.info.tn/en/index.php?option=com_content&task=view&id=1188&Itemid=50

# From Steffen Thorsen (2009-03-16):
# According to several news sources, Tunisia will not observe DST this year.
# (Arabic)
# http://www.elbashayer.com/?page=viewn&nid=42546
# https://www.babnet.net/kiwidetail-15295.asp
#
# We have also confirmed this with the US embassy in Tunisia.
# We have a wrap-up about this on the following page:
# https://www.timeanddate.com/news/time/tunisia-cancels-dst-2009.html

# From Alexander Krivenyshev (2009-03-17):
# Here is a link to Tunis Afrique Presse News Agency
#
# Standard time to be kept the whole year long (tap.info.tn):
#
# (in English)
# http://www.tap.info.tn/en/index.php?option=com_content&task=view&id=26813&Itemid=157
#
# (in Arabic)
# http://www.tap.info.tn/ar/index.php?option=com_content&task=view&id=61240&Itemid=1

# From Arthur David Olson (2009-03-18):
# The Tunis Afrique Presse News Agency notice contains this: "This measure is
# due to the fact that the fasting month of Ramadan coincides with the period
# concerned by summer time.  Therefore, the standard time will be kept
# unchanged the whole year long."  So foregoing DST seems to be an exception
# (albeit one that may be repeated in the future).

# From Alexander Krivenyshev (2010-03-27):
# According to some news reports Tunis confirmed not to use DST in 2010
#
# (translation):
# "The Tunisian government has decided to abandon DST, which was scheduled on
# Sunday...
# Tunisian authorities had suspended the DST for the first time last year also
# coincided with the month of Ramadan..."
#
# (in Arabic)
# http://www.moheet.com/show_news.aspx?nid=358861&pg=1
# http://www.almadenahnews.com/newss/news.php?c=118&id=38036
# http://www.worldtimezone.com/dst_news/dst_news_tunis02.html

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Tunisia	1939	only	-	Apr	15	23:00s	1:00	S
Rule	Tunisia	1939	only	-	Nov	18	23:00s	0	-
Rule	Tunisia	1940	only	-	Feb	25	23:00s	1:00	S
Rule	Tunisia	1941	only	-	Oct	 6	 0:00	0	-
Rule	Tunisia	1942	only	-	Mar	 9	 0:00	1:00	S
Rule	Tunisia	1942	only	-	Nov	 2	 3:00	0	-
Rule	Tunisia	1943	only	-	Mar	29	 2:00	1:00	S
Rule	Tunisia	1943	only	-	Apr	17	 2:00	0	-
Rule	Tunisia	1943	only	-	Apr	25	 2:00	1:00	S
Rule	Tunisia	1943	only	-	Oct	 4	 2:00	0	-
Rule	Tunisia	1944	1945	-	Apr	Mon>=1	 2:00	1:00	S
Rule	Tunisia	1944	only	-	Oct	 8	 0:00	0	-
Rule	Tunisia	1945	only	-	Sep	16	 0:00	0	-
Rule	Tunisia	1977	only	-	Apr	30	 0:00s	1:00	S
Rule	Tunisia	1977	only	-	Sep	24	 0:00s	0	-
Rule	Tunisia	1978	only	-	May	 1	 0:00s	1:00	S
Rule	Tunisia	1978	only	-	Oct	 1	 0:00s	0	-
Rule	Tunisia	1988	only	-	Jun	 1	 0:00s	1:00	S
Rule	Tunisia	1988	1990	-	Sep	lastSun	 0:00s	0	-
Rule	Tunisia	1989	only	-	Mar	26	 0:00s	1:00	S
Rule	Tunisia	1990	only	-	May	 1	 0:00s	1:00	S
Rule	Tunisia	2005	only	-	May	 1	 0:00s	1:00	S
Rule	Tunisia	2005	only	-	Sep	30	 1:00s	0	-
Rule	Tunisia	2006	2008	-	Mar	lastSun	 2:00s	1:00	S
Rule	Tunisia	2006	2008	-	Oct	lastSun	 2:00s	0	-

# See Europe/Paris commentary for PMT-related transitions.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Africa/Tunis	0:40:44 -	LMT	1881 May 12
			0:09:21	-	PMT	1911 Mar 11 # Paris Mean Time
			1:00	Tunisia	CE%sT
# tzdb data for Antarctica and environs

# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.

# From Paul Eggert (1999-11-15):
# To keep things manageable, we list only locations occupied year-round; see
# COMNAP - Stations and Bases
# http://www.comnap.aq/comnap/comnap.nsf/P/Stations/
# and
# Summary of the Peri-Antarctic Islands (1998-07-23)
# http://www.spri.cam.ac.uk/bob/periant.htm
# for information.
# Unless otherwise specified, we have no time zone information.

# FORMAT is '-00' and STDOFF is 0 for locations while uninhabited.

# Argentina - year-round bases
# Belgrano II, Confin Coast, -770227-0343737, since 1972-02-05
# Carlini, Potter Cove, King George Island, -6414-0602320, since 1982-01
# Esperanza, Hope Bay, -6323-05659, since 1952-12-17
# Marambio, -6414-05637, since 1969-10-29
# Orcadas, Laurie I, -6016-04444, since 1904-02-22
# San Martín, Barry I, -6808-06706, since 1951-03-21
#	(except 1960-03 / 1976-03-21)

# Australia - territories
# Heard Island, McDonald Islands (uninhabited)
#	previously sealers and scientific personnel wintered
#	Margaret Turner reports
#	https://web.archive.org/web/20021204222245/http://www.dstc.qut.edu.au/DST/marg/daylight.html
#	(1999-09-30) that they're UT +05, with no DST;
#	presumably this is when they have visitors.
#
# year-round bases
# Casey, Bailey Peninsula, -6617+11032, since 1969
# Davis, Vestfold Hills, -6835+07759, since 1957-01-13
#	(except 1964-11 - 1969-02)
# Mawson, Holme Bay, -6736+06253, since 1954-02-13

# From Steffen Thorsen (2009-03-11):
# Three Australian stations in Antarctica have changed their time zone:
# Casey moved from UTC+8 to UTC+11
# Davis moved from UTC+7 to UTC+5
# Mawson moved from UTC+6 to UTC+5
# The changes occurred on 2009-10-18 at 02:00 (local times).
#
# Government source: (Australian Antarctic Division)
# http://www.aad.gov.au/default.asp?casid=37079
#
# We have more background information here:
# https://www.timeanddate.com/news/time/antarctica-new-times.html

# From Steffen Thorsen (2010-03-10):
# We got these changes from the Australian Antarctic Division: ...
#
# - Casey station reverted to its normal time of UTC+8 on 5 March 2010.
# The change to UTC+11 is being considered as a regular summer thing but
# has not been decided yet.
#
# - Davis station will revert to its normal time of UTC+7 at 10 March 2010
# 20:00 UTC.
#
# - Mawson station stays on UTC+5.
#
# Background:
# https://www.timeanddate.com/news/time/antartica-time-changes-2010.html

# From Steffen Thorsen (2016-10-28):
# Australian Antarctica Division informed us that Casey changed time
# zone to UTC+11 in "the morning of 22nd October 2016".

# From Steffen Thorsen (2020-10-02, as corrected):
# Based on information we have received from the Australian Antarctic
# Division, Casey station and Macquarie Island station will move to Tasmanian
# daylight savings time on Sunday 4 October. This will take effect from 0001
# hrs on Sunday 4 October 2020 and will mean Casey and Macquarie Island will
# be on the same time zone as Hobart.  Some past dates too for this 3 hour
# time change back and forth between UTC+8 and UTC+11 for Casey:
# - 2018 Oct  7 4:00 - 2019 Mar 17 3:00 - 2019 Oct  4 3:00 - 2020 Mar  8 3:00
# and now - 2020 Oct  4 0:01

# From Paul Eggert (2023-12-20):
# Transitions from 2021 on are taken from:
# https://www.timeanddate.com/time/zone/antarctica/casey
# retrieved at various dates.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Antarctica/Casey	 0	-	-00	1969
			 8:00	-	%z	2009 Oct 18  2:00
			11:00	-	%z	2010 Mar  5  2:00
			 8:00	-	%z	2011 Oct 28  2:00
			11:00	-	%z	2012 Feb 21 17:00u
			 8:00	-	%z	2016 Oct 22
			11:00	-	%z	2018 Mar 11  4:00
			 8:00	-	%z	2018 Oct  7  4:00
			11:00	-	%z	2019 Mar 17  3:00
			 8:00	-	%z	2019 Oct  4  3:00
			11:00	-	%z	2020 Mar  8  3:00
			 8:00	-	%z	2020 Oct  4  0:01
			11:00	-	%z	2021 Mar 14  0:00
			 8:00	-	%z	2021 Oct  3  0:01
			11:00	-	%z	2022 Mar 13  0:00
			 8:00	-	%z	2022 Oct  2  0:01
			11:00	-	%z	2023 Mar  9  3:00
			 8:00	-	%z
Zone Antarctica/Davis	0	-	-00	1957 Jan 13
			7:00	-	%z	1964 Nov
			0	-	-00	1969 Feb
			7:00	-	%z	2009 Oct 18  2:00
			5:00	-	%z	2010 Mar 10 20:00u
			7:00	-	%z	2011 Oct 28  2:00
			5:00	-	%z	2012 Feb 21 20:00u
			7:00	-	%z
Zone Antarctica/Mawson	0	-	-00	1954 Feb 13
			6:00	-	%z	2009 Oct 18  2:00
			5:00	-	%z
# References:
# Casey Weather (1998-02-26)
# http://www.antdiv.gov.au/aad/exop/sfo/casey/casey_aws.html
# Davis Station, Antarctica (1998-02-26)
# http://www.antdiv.gov.au/aad/exop/sfo/davis/video.html
# Mawson Station, Antarctica (1998-02-25)
# http://www.antdiv.gov.au/aad/exop/sfo/mawson/video.html

# Belgium - year-round base
# Princess Elisabeth, Queen Maud Land, -713412+0231200, since 2007

# Brazil - year-round base
# Ferraz, King George Island, -6205+05824, since 1983/4

# Bulgaria - year-round base
# St. Kliment Ohridski, Livingston Island, -623829-0602153, since 1988

# Chile - year-round bases and towns
# Escudero, South Shetland Is, -621157-0585735, since 1994
# Frei Montalva, King George Island, -6214-05848, since 1969-03-07
# O'Higgins, Antarctic Peninsula, -6319-05704, since 1948-02
# Prat, -6230-05941
# Villa Las Estrellas (a town), around the Frei base, since 1984-04-09
# These locations employ Region of Magallanes time; use
# TZ='America/Punta_Arenas'.

# China - year-round bases
# Great Wall, King George Island, -6213-05858, since 1985-02-20
# Zhongshan, Larsemann Hills, Prydz Bay, -6922+07623, since 1989-02-26

# France - year-round bases (also see "France & Italy")
#
# From Antoine Leca (1997-01-20):
# Time data entries are from Nicole Pailleau at the IFRTP
# (French Institute for Polar Research and Technology).
# She confirms that French Southern Territories and Terre Adélie bases
# don't observe daylight saving time, even if Terre Adélie supplies came
# from Tasmania.
#
# French Southern Territories with year-round inhabitants
#
# Alfred Faure, Possession Island, Crozet Islands, -462551+0515152, since 1964;
#	sealing & whaling stations operated variously 1802/1911+;
#	see Asia/Dubai.
#
# Martin-de-Viviès, Amsterdam Island, -374105+0773155, since 1950
# Port-aux-Français, Kerguelen Islands, -492110+0701303, since 1951;
#	whaling & sealing station operated 1908/1914, 1920/1929, and 1951/1956
#
# St Paul Island - near Amsterdam, uninhabited
#	fishing stations operated variously 1819/1931
#
# Kerguelen - see Indian/Maldives.
#
# year-round base in the main continent
# Dumont d'Urville - see Pacific/Port_Moresby.

# France & Italy - year-round base
# Concordia, -750600+1232000, since 2005
# https://en.wikipedia.org/wiki/Concordia_Station
# Can use Asia/Singapore, which it has agreed with since inception.

# Germany - year-round base
# Neumayer III, -704080-0081602, since 2009

# India - year-round bases
# Bharati, -692428+0761114, since 2012
# Maitri, -704558+0114356, since 1989

# Italy - year-round base (also see "France & Italy")
# Zuchelli, Terra Nova Bay, -744140+1640647, since 1986

# Japan - year-round bases
# See Asia/Riyadh.

# S Korea - year-round base
# Jang Bogo, Terra Nova Bay, -743700+1641205 since 2014
# King Sejong, King George Island, -6213-05847, since 1988

# New Zealand - claims
# Balleny Islands (never inhabited)
# Scott Island (never inhabited)
#
# year-round base
# Scott Base, Ross Island, since 1957-01.
# See Pacific/Auckland.

# Norway - territories
# Bouvet (never inhabited)
#
# claims
# Peter I Island (never inhabited)
#
# year-round base
# Troll, Queen Maud Land, -720041+0023206, since 2005-02-12
#
# From Paul-Inge Flakstad (2014-03-10):
# I recently had a long dialog about this with the developer of timegenie.com.
# In the absence of specific dates, he decided to choose some likely ones:
#   GMT +1 - From March 1 to the last Sunday in March
#   GMT +2 - From the last Sunday in March until the last Sunday in October
#   GMT +1 - From the last Sunday in October until November 7
#   GMT +0 - From November 7 until March 1
# The dates for switching to and from UTC+0 will probably not be absolutely
# correct, but they should be quite close to the actual dates.
#
# From Paul Eggert (2014-03-21):
# The CET-switching Troll rules require zic from tz 2014b or later, so as
# suggested by Bengt-Inge Larsson comment them out for now, and approximate
# with only UTC and CEST.  Uncomment them when 2014b is more prevalent.
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
#Rule	Troll	2005	max	-	Mar	 1	1:00u	1:00	+01
Rule	Troll	2005	max	-	Mar	lastSun	1:00u	2:00	+02
#Rule	Troll	2005	max	-	Oct	lastSun	1:00u	1:00	+01
#Rule	Troll	2004	max	-	Nov	 7	1:00u	0:00	+00
# Remove the following line when uncommenting the above '#Rule' lines.
Rule	Troll	2004	max	-	Oct	lastSun	1:00u	0:00	+00
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Antarctica/Troll	0	-	-00	2005 Feb 12
			0:00	Troll	%s

# Poland - year-round base
# Arctowski, King George Island, -620945-0582745, since 1977

# Romania - year-bound base
# Law-Racoviță, Larsemann Hills, -692319+0762251, since 1986

# Russia - year-round bases
# Bellingshausen, King George Island, -621159-0585337, since 1968-02-22
# Mirny, Davis coast, -6633+09301, since 1956-02
# Molodezhnaya, Alasheyev Bay, -6740+04551,
#	year-round from 1962-02 to 1999-07-01
# Novolazarevskaya, Queen Maud Land, -7046+01150,
#	year-round from 1960/61 to 1992

# Vostok, since 1957-12-16, temporarily closed 1994-02/1994-11
# From Craig Mundell (1994-12-15):
# http://quest.arc.nasa.gov/antarctica/QA/computers/Directions,Time,ZIP
# Vostok, which is one of the Russian stations, is set on the same
# time as Moscow, Russia.
#
# From Lee Hotz (2001-03-08):
# I queried the folks at Columbia who spent the summer at Vostok and this is
# what they had to say about time there:
# "in the US Camp (East Camp) we have been on New Zealand (McMurdo)
# time, which is 12 hours ahead of GMT. The Russian Station Vostok was
# 6 hours behind that (although only 2 miles away, i.e. 6 hours ahead
# of GMT). This is a time zone I think two hours east of Moscow. The
# natural time zone is in between the two: 8 hours ahead of GMT."
#
# From Paul Eggert (2001-05-04):
# This seems to be hopelessly confusing, so I asked Lee Hotz about it
# in person.  He said that some Antarctic locations set their local
# time so that noon is the warmest part of the day, and that this
# changes during the year and does not necessarily correspond to mean
# solar noon.  So the Vostok time might have been whatever the clocks
# happened to be during their visit.  So we still don't really know what time
# it is at Vostok.
#
# From Zakhary V. Akulov (2023-12-17 22:00:48 +0700):
# ... from December, 18, 2023 00:00 by my decision the local time of
# the Antarctic research base Vostok will correspond to UTC+5.
# (2023-12-19): We constantly interact with Progress base, with company who
# builds new wintering station, with sledge convoys, with aviation - they all
# use UTC+5. Besides, difference between Moscow time is just 2 hours now, not 4.
# (2023-12-19, in response to the question "Has local time at Vostok
# been UTC+6 ever since 1957, or has it changed before?"): No. At least
# since my antarctic career start, 10 years ago, Vostok base has UTC+7.
# (In response to a 2023-12-18 question "from 02:00 to 00:00 today"): This.
#
# From Paul Eggert (2023-12-18):
# For lack of better info, guess Vostok was at +07 from founding through today,
# except when closed.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Antarctica/Vostok	0	-	-00	1957 Dec 16
			7:00	-	%z	1994 Feb
			0	-	-00	1994 Nov
			7:00	-	%z	2023 Dec 18  2:00
			5:00	-	%z

# S Africa - year-round bases
# Marion Island, -4653+03752
# SANAE IV, Vesleskarvet, Queen Maud Land, -714022-0025026, since 1997

# Ukraine - year-round base
# Vernadsky (formerly Faraday), Galindez Island, -651445-0641526, since 1954

# United Kingdom
#
# British Antarctic Territories (BAT) claims
# South Orkney Islands
#	scientific station from 1903
#	whaling station at Signy I 1920/1926
# South Shetland Islands
#
# year-round bases
# Bird Island, South Georgia, -5400-03803, since 1983
# Deception Island, -6259-06034, whaling station 1912/1931,
#	scientific station 1943/1967,
#	previously sealers and a scientific expedition wintered by accident,
#	and a garrison was deployed briefly
# Halley, Coates Land, -7535-02604, since 1956-01-06
#	Halley is on a moving ice shelf and is periodically relocated
#	so that it is never more than 10km from its nominal location.
# Rothera, Adelaide Island, -6734-6808, since 1976-12-01
#
# From Paul Eggert (2002-10-22)
# <http://webexhibits.org/daylightsaving/g.html> says Rothera is -03 all year.
#
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Antarctica/Rothera	0	-	-00	1976 Dec  1
			-3:00	-	%z

# Uruguay - year round base
# Artigas, King George Island, -621104-0585107

# USA - year-round bases
#
# Palmer, Anvers Island, since 1965 (moved 2 miles in 1968)
# See 'southamerica' for Antarctica/Palmer, since it uses South American DST.
#
# McMurdo Station, Ross Island, since 1955-12
# Amundsen-Scott South Pole Station, continuously occupied since 1956-11-20
#
# From Chris Carrier (1996-06-27):
# Siple, the first commander of the South Pole station,
# stated that he would have liked to have kept GMT at the station,
# but that he found it more convenient to keep GMT+12
# as supplies for the station were coming from McMurdo Sound,
# which was on GMT+12 because New Zealand was on GMT+12 all year
# at that time (1957).  (Source: Siple's book 90° South.)
#
# From Susan Smith
# http://www.cybertours.com/whs/pole10.html
# (1995-11-13 16:24:56 +1300, no longer available):
# We use the same time as McMurdo does.
# And they use the same time as Christchurch, NZ does....
# One last quirk about South Pole time.
# All the electric clocks are usually wrong.
# Something about the generators running at 60.1hertz or something
# makes all of the clocks run fast.  So every couple of days,
# we have to go around and set them back 5 minutes or so.
# Maybe if we let them run fast all of the time, we'd get to leave here sooner!!
#
# See Pacific/Auckland.
# tzdb data for Asia and environs

# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.

# This file is by no means authoritative; if you think you know better,
# go ahead and edit the file (and please send any changes to
# tz@iana.org for general use in the future).  For more, please see
# the file CONTRIBUTING in the tz distribution.

# From Paul Eggert (2019-07-11):
#
# Unless otherwise specified, the source for data through 1990 is:
# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
# San Diego: ACS Publications, Inc. (2003).
# Unfortunately this book contains many errors and cites no sources.
#
# Many years ago Gwillim Law wrote that a good source
# for time zone data was the International Air Transport
# Association's Standard Schedules Information Manual (IATA SSIM),
# published semiannually.  Law sent in several helpful summaries
# of the IATA's data after 1990.  Except where otherwise noted,
# IATA SSIM is the source for entries after 1990.
#
# Another source occasionally used is Edward W. Whitman, World Time Differences,
# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
# I found in the UCLA library.
#
# For data circa 1899, a common source is:
# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
# https://www.jstor.org/stable/1774359
#
# For Russian data circa 1919, a source is:
# Byalokoz EL. New Counting of Time in Russia since July 1, 1919.
# (See the 'europe' file for a fuller citation.)
#
# The following alphabetic abbreviations appear in these tables
# (corrections are welcome):
#	     std  dst
#	     LMT	Local Mean Time
#	2:00 EET  EEST	Eastern European Time
#	2:00 IST  IDT	Israel
#	5:30 IST	India
#	7:00 WIB	west Indonesia (Waktu Indonesia Barat)
#	8:00 WITA	central Indonesia (Waktu Indonesia Tengah)
#	8:00 CST	China
#	8:00 HKT  HKST	Hong Kong (HKWT* for Winter Time in late 1941)
#	8:00 PST  PDT*	Philippines
#	8:30 KST  KDT	Korea when at +0830
#	9:00 WIT	east Indonesia (Waktu Indonesia Timur)
#	9:00 JST  JDT	Japan
#	9:00 KST  KDT	Korea when at +09
# *I invented the abbreviations HKWT and PDT; see below.
# Otherwise, these tables typically use numeric abbreviations like +03
# and +0330 for integer hour and minute UT offsets.  Although earlier
# editions invented alphabetic time zone abbreviations for every
# offset, this did not reflect common practice.
#
# See the 'europe' file for Russia and Turkey in Asia.

# From Guy Harris:
# Incorporates data for Singapore from Robert Elz' asia 1.1, as well as
# additional information from Tom Yap, Sun Microsystems Intercontinental
# Technical Support (including a page from the Official Airline Guide -
# Worldwide Edition).

###############################################################################

# These rules are stolen from the 'europe' file.
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	EUAsia	1981	max	-	Mar	lastSun	 1:00u	1:00	S
Rule	EUAsia	1979	1995	-	Sep	lastSun	 1:00u	0	-
Rule	EUAsia	1996	max	-	Oct	lastSun	 1:00u	0	-
Rule E-EurAsia	1981	max	-	Mar	lastSun	 0:00	1:00	-
Rule E-EurAsia	1979	1995	-	Sep	lastSun	 0:00	0	-
Rule E-EurAsia	1996	max	-	Oct	lastSun	 0:00	0	-
Rule RussiaAsia	1981	1984	-	Apr	1	 0:00	1:00	-
Rule RussiaAsia	1981	1983	-	Oct	1	 0:00	0	-
Rule RussiaAsia	1984	1995	-	Sep	lastSun	 2:00s	0	-
Rule RussiaAsia	1985	2010	-	Mar	lastSun	 2:00s	1:00	-
Rule RussiaAsia	1996	2010	-	Oct	lastSun	 2:00s	0	-

# Afghanistan
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Kabul	4:36:48 -	LMT	1890
			4:00	-	%z	1945
			4:30	-	%z

# Armenia
# From Paul Eggert (2006-03-22):
# Shanks & Pottenger have Yerevan switching to 3:00 (with Russian DST)
# in spring 1991, then to 4:00 with no DST in fall 1995, then
# readopting Russian DST in 1997.  Go with Shanks & Pottenger, even
# when they disagree with others.  Edgar Der-Danieliantz
# reported (1996-05-04) that Yerevan probably wouldn't use DST
# in 1996, though it did use DST in 1995.  IATA SSIM (1991/1998) reports that
# Armenia switched from 3:00 to 4:00 in 1998 and observed DST after 1991,
# but started switching at 3:00s in 1998.

# From Arthur David Olson (2011-06-15):
# While Russia abandoned DST in 2011, Armenia may choose to
# follow Russia's "old" rules.

# From Alexander Krivenyshev (2012-02-10):
# According to News Armenia, on Feb 9, 2012,
# http://newsarmenia.ru/society/20120209/42609695.html
#
# The Armenia National Assembly adopted final reading of Amendments to the
# Law "On procedure of calculation time on the territory of the Republic of
# Armenia" according to which Armenia [is] abolishing Daylight Saving Time.
# or
# (brief)
# http://www.worldtimezone.com/dst_news/dst_news_armenia03.html
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule Armenia	2011	only	-	Mar	lastSun	 2:00s	1:00	-
Rule Armenia	2011	only	-	Oct	lastSun	 2:00s	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Yerevan	2:58:00 -	LMT	1924 May  2
			3:00	-	%z	1957 Mar
			4:00 RussiaAsia %z	1991 Mar 31  2:00s
			3:00 RussiaAsia	%z	1995 Sep 24  2:00s
			4:00	-	%z	1997
			4:00 RussiaAsia	%z	2011
			4:00	Armenia	%z

# Azerbaijan

# From Rustam Aliyev of the Azerbaijan Internet Forum (2005-10-23):
# According to the resolution of Cabinet of Ministers, 1997
# From Paul Eggert (2015-09-17): It was Resolution No. 21 (1997-03-17).
# http://code.az/files/daylight_res.pdf

# From Steffen Thorsen (2016-03-17):
# ... the Azerbaijani Cabinet of Ministers has cancelled switching to
# daylight saving time....
# https://www.azernews.az/azerbaijan/94137.html
# http://vestnikkavkaza.net/news/Azerbaijani-Cabinet-of-Ministers-cancels-daylight-saving-time.html
# http://en.apa.az/xeber_azerbaijan_abolishes_daylight_savings_ti_240862.html

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Azer	1997	2015	-	Mar	lastSun	 4:00	1:00	-
Rule	Azer	1997	2015	-	Oct	lastSun	 5:00	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Baku	3:19:24 -	LMT	1924 May  2
			3:00	-	%z	1957 Mar
			4:00 RussiaAsia %z	1991 Mar 31  2:00s
			3:00 RussiaAsia	%z	1992 Sep lastSun  2:00s
			4:00	-	%z	1996
			4:00	EUAsia	%z	1997
			4:00	Azer	%z

# Bangladesh
# From Alexander Krivenyshev (2009-05-13):
# According to newspaper Asian Tribune (May 6, 2009) Bangladesh may introduce
# Daylight Saving Time from June 16 to Sept 30
#
# Bangladesh to introduce daylight saving time likely from June 16
# http://www.asiantribune.com/?q=node/17288
# http://www.worldtimezone.com/dst_news/dst_news_bangladesh02.html
#
# "... Bangladesh government has decided to switch daylight saving time from
# June
# 16 till September 30 in a bid to ensure maximum use of daylight to cope with
# crippling power crisis. "
#
# The switch will remain in effect from June 16 to Sept 30 (2009) but if
# implemented the next year, it will come in force from April 1, 2010

# From Steffen Thorsen (2009-06-02):
# They have finally decided now, but changed the start date to midnight between
# the 19th and 20th, and they have not set the end date yet.
#
# Some sources:
# https://in.reuters.com/article/southAsiaNews/idINIndia-40017620090601
# http://bdnews24.com/details.php?id=85889&cid=2
#
# Our wrap-up:
# https://www.timeanddate.com/news/time/bangladesh-daylight-saving-2009.html

# From A. N. M. Kamrus Saadat (2009-06-15):
# Finally we've got the official mail regarding DST start time where DST start
# time is mentioned as Jun 19 2009, 23:00 from BTRC (Bangladesh
# Telecommunication Regulatory Commission).
#
# No DST end date has been announced yet.

# From Alexander Krivenyshev (2009-09-25):
# Bangladesh won't go back to Standard Time from October 1, 2009,
# instead it will continue DST measure till the cabinet makes a fresh decision.
#
# Following report by same newspaper-"The Daily Star Friday":
# "DST change awaits cabinet decision-Clock won't go back by 1-hr from Oct 1"
# http://www.thedailystar.net/newDesign/news-details.php?nid=107021
# http://www.worldtimezone.com/dst_news/dst_news_bangladesh04.html

# From Steffen Thorsen (2009-10-13):
# IANS (Indo-Asian News Service) now reports:
# Bangladesh has decided that the clock advanced by an hour to make
# maximum use of daylight hours as an energy saving measure would
# "continue for an indefinite period."
#
# One of many places where it is published:
# http://www.thaindian.com/newsportal/business/bangladesh-to-continue-indefinitely-with-advanced-time_100259987.html

# From Alexander Krivenyshev (2009-12-24):
# According to Bangladesh newspaper "The Daily Star,"
# Bangladesh will change its clock back to Standard Time on Dec 31, 2009.
#
# Clock goes back 1-hr on Dec 31 night.
# http://www.thedailystar.net/newDesign/news-details.php?nid=119228
# http://www.worldtimezone.com/dst_news/dst_news_bangladesh05.html
#
# "...The government yesterday decided to put the clock back by one hour
# on December 31 midnight and the new time will continue until March 31,
# 2010 midnight. The decision came at a cabinet meeting at the Prime
# Minister's Office last night..."

# From Alexander Krivenyshev (2010-03-22):
# According to Bangladesh newspaper "The Daily Star,"
# Cabinet cancels Daylight Saving Time
# http://www.thedailystar.net/newDesign/latest_news.php?nid=22817
# http://www.worldtimezone.com/dst_news/dst_news_bangladesh06.html

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Dhaka	2009	only	-	Jun	19	23:00	1:00	-
Rule	Dhaka	2009	only	-	Dec	31	24:00	0	-

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Dhaka	6:01:40 -	LMT	1890
			5:53:20	-	HMT	1941 Oct    # Howrah Mean Time?
			6:30	-	%z	1942 May 15
			5:30	-	%z	1942 Sep
			6:30	-	%z	1951 Sep 30
			6:00	-	%z	2009
			6:00	Dhaka	%z

# Bhutan
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Thimphu	5:58:36 -	LMT	1947 Aug 15 # or Thimbu
			5:30	-	%z	1987 Oct
			6:00	-	%z

# British Indian Ocean Territory
# Whitman and the 1995 CIA time zone map say 5:00, but the
# 1997 and later maps say 6:00.  Assume the switch occurred in 1996.
# We have no information as to when standard time was introduced;
# assume it occurred in 1907, the same year as Mauritius (which
# then contained the Chagos Archipelago).
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Indian/Chagos	4:49:40	-	LMT	1907
			5:00	-	%z	1996
			6:00	-	%z

# Cocos (Keeling) Islands
# Myanmar (Burma)

# Milne says 6:24:40 was the meridian of the time ball observatory at Rangoon.

# From Paul Eggert (2017-04-20):
# Page 27 of Reed & Low (cited for Asia/Kolkata) says "Rangoon local time is
# used upon the railways and telegraphs of Burma, and is 6h. 24m. 47s. ahead
# of Greenwich."  This refers to the period before Burma's transition to +0630,
# a transition for which Shanks is the only source.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Yangon	6:24:47 -	LMT	1880        # or Rangoon
			6:24:47	-	RMT	1920        # Rangoon local time
			6:30	-	%z	1942 May
			9:00	-	%z	1945 May  3
			6:30	-	%z

# China

# From Phake Nick (2020-04-15):
# According to this news report:
# http://news.sina.com.cn/c/2004-09-01/19524201403.shtml
# on April 11, 1919, newspaper in Shanghai said clocks in Shanghai will spring
# forward for an hour starting from midnight of that Saturday. The report did
# not mention what happened in Shanghai thereafter, but it mentioned that a
# similar trial in Tianjin which ended at October 1st as citizens are told to
# recede the clock on September 30 from 12:00pm to 11:00pm. The trial at
# Tianjin got terminated in 1920.
#
# From Paul Eggert (2020-04-15):
# The Returns of Trade and Trade Reports, page 711, says "Daylight saving was
# given a trial during the year, and from the 12th April to the 1st October
# the clocks were all set one hour ahead of sun time.  Though the scheme was
# generally esteemed a success, it was announced early in 1920 that it would
# not be repeated."
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Shang	1919	only	-	Apr	12	24:00	1:00	D
Rule	Shang	1919	only	-	Sep	30	24:00	0	S

# From Paul Eggert (2018-10-02):
# The following comes from Table 1 of:
# Li Yu. Research on the daylight saving movement in 1940s Shanghai.
# Nanjing Journal of Social Sciences. 2014;(2):144-50.
# http://oversea.cnki.net/kns55/detail.aspx?dbname=CJFD2014&filename=NJSH201402020
# The table lists dates only; I am guessing 00:00 and 24:00 transition times.
# Also, the table lists the planned end of DST in 1949, but the corresponding
# zone line cuts this off on May 28, when the Communists took power.

# From Phake Nick (2020-04-15):
#
# For the history of time in Shanghai between 1940-1942, the situation is
# actually slightly more complex than the table [below]....  At the time,
# there were three different authorities in Shanghai, including Shanghai
# International Settlement, a settlement established by western countries with
# its own westernized form of government, Shanghai French Concession, similar
# to the international settlement but is controlled by French, and then the
# rest of the city of Shanghai, which have already been controlled by Japanese
# force through a puppet local government (Wang Jingwei regime).  It was
# additionally complicated by the circumstances that, according to the 1940s
# Shanghai summer time essay cited in the database, some
# departments/businesses/people in the Shanghai city itself during that time
# period, refused to change their clock and instead only changed their opening
# hours.
#
# For example, as quoted in the article, in 1940, other than the authority
# itself, power, tram, bus companies, cinema, department stores, and other
# public service organizations have all decided to follow the summer time and
# spring forward the clock.  On the other hand, the custom office refused to
# spring forward the clock because of worry on mechanical wear to the physical
# clock, postal office refused to spring forward because of disruption to
# business and log-keeping, although they did changed their office hour to
# match rest of the city.  So is travel agents, and also weather
# observatory.  It is said both time standards had their own supporters in the
# city at the time, those who prefer new time standard would have moved their
# clock while those who prefer the old time standard would keep their clock
# unchange, and there were different clocks that use different time standard
# in the city at the time for people who use different time standard to adjust
# their clock to their preferred time.
#
# a. For the 1940 May 31 spring forward, the essay [says] ... "Hong
# Kong government implemented the spring forward in the same time on
# the same date as Shanghai".
#
# b. For the 1940 fall back, it was said that they initially intended to do
# so on September 30 00:59 at night, however they postponed it to October 12
# after discussion with relevant parties. However schools restored to the
# original schedule ten days earlier.
#
# c. For the 1941 spring forward, it is said to start from March 15
# "following the previous year's method", and in addition to that the essay
# cited an announcement in 1941 from the Wang regime which said the Special
# City of Shanghai under Wang regime control will follow the DST rule set by
# the Settlements, irrespective of the original DST plan announced by the Wang
# regime for other area under its control(April 1 to September 30). (no idea
# to situation before that announcement)
#
# d. For the 1941 fall back, it was said that the fall back would occurs at
# the end of September (A newspaper headline cited by the essay, published on
# October 1, 1941, have the headlines which said "French Concession would
# rewind to the old clock this morning), but it ultimately didn't happen due
# to disagreement between the international settlement authority and the
# French concession authority, and the fall back ultimately occurred on
# November 1.
#
# e. In 1941 December, Japan have officially started war with the United
# States and the United Kingdom, and in Shanghai they have marched into the
# international settlement, taken over its control
#
# f. For the 1942 spring forward, the essay said that the spring forward
# started on January 31. It said this time the custom office and postal
# department will also change their clocks, unlike before.
#
# g. The essay itself didn't cover any specific changes thereafter until the
# end of the war, it quoted a November 1942 command from the government of the
# Wang regime, which claim the daylight saving time applies year round during
# the war. However, the essay ambiguously said the period is "February 1 to
# September 30", which I don't really understand what is the meaning of such
# period in the context of year round implementation here.. More researches
# might be needed to show exactly what happened during that period of time.

# From Phake Nick (2020-04-15):
# According to a Japanese tour bus pamphlet in Nanjing area believed to be
# from around year 1941: http://www.tt-museum.jp/tairiku_0280_nan1941.html ,
# the schedule listed was in the format of Japanese time.  Which indicate some
# use of the Japanese time (instead of syncing by DST) might have occurred in
# the Yangtze river delta area during that period of time although the scope
# of such use will need to be investigated to determine.
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Shang	1940	only	-	Jun	 1	 0:00	1:00	D
Rule	Shang	1940	only	-	Oct	12	24:00	0	S
Rule	Shang	1941	only	-	Mar	15	 0:00	1:00	D
Rule	Shang	1941	only	-	Nov	 1	24:00	0	S
Rule	Shang	1942	only	-	Jan	31	 0:00	1:00	D
Rule	Shang	1945	only	-	Sep	 1	24:00	0	S
Rule	Shang	1946	only	-	May	15	 0:00	1:00	D
Rule	Shang	1946	only	-	Sep	30	24:00	0	S
Rule	Shang	1947	only	-	Apr	15	 0:00	1:00	D
Rule	Shang	1947	only	-	Oct	31	24:00	0	S
Rule	Shang	1948	1949	-	May	 1	 0:00	1:00	D
Rule	Shang	1948	1949	-	Sep	30	24:00	0	S #plan

# From Guy Harris:
# People's Republic of China.  Yes, they really have only one time zone.

# From Bob Devine (1988-01-28):
# No they don't.  See TIME mag, 1986-02-17 p.52.  Even though
# China is across 4 physical time zones, before Feb 1, 1986 only the
# Peking (Beijing) time zone was recognized.  Since that date, China
# has two of 'em - Peking's and Ürümqi (named after the capital of
# the Xinjiang Uyghur Autonomous Region).  I don't know about DST for it.
#
# . . .I just deleted the DST table and this editor makes it too
# painful to suck in another copy.  So, here is what I have for
# DST start/end dates for Peking's time zone (info from AP):
#
#     1986 May 4 - Sept 14
#     1987 mid-April - ??

# From U. S. Naval Observatory (1989-01-19):
# CHINA               8 H  AHEAD OF UTC  ALL OF CHINA, INCL TAIWAN
# CHINA               9 H  AHEAD OF UTC  APR 17 - SEP 10

# From Paul Eggert (2008-02-11):
# Jim Mann, "A clumsy embrace for another western custom: China on daylight
# time - sort of", Los Angeles Times, 1986-05-05 ... [says] that China began
# observing daylight saving time in 1986.

# From P Chan (2018-05-07):
# The start and end time of DST in China [from 1986 on] should be 2:00
# (i.e. 2:00 to 3:00 at the start and 2:00 to 1:00 at the end)....
# Government notices about summer time:
#
# 1986-04-12 http://www.zj.gov.cn/attach/zfgb/198608.pdf p.21-22
# (To establish summer time from 1986. On 4 May, set the clocks ahead one hour
# at 2 am. On 14 September, set the clocks backward one hour at 2 am.)
#
# 1987-02-15 http://www.gov.cn/gongbao/shuju/1987/gwyb198703.pdf p.114
# (Summer time in 1987 to start from 12 April until 13 September)
#
# 1987-09-09 http://www.gov.cn/gongbao/shuju/1987/gwyb198721.pdf p.709
# (From 1988, summer time to start from 2 am of the first Sunday of mid-April
# until 2 am of the first Sunday of mid-September)
#
# 1992-03-03 http://www.gov.cn/gongbao/shuju/1992/gwyb199205.pdf p.152
# (To suspend summer time from 1992)
#
# The first page of People's Daily on 12 April 1988 stating that summer time
# to begin on 17 April.
# http://data.people.com.cn/pic/101p/1988/04/1988041201.jpg

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	PRC	1986	only	-	May	 4	 2:00	1:00	D
Rule	PRC	1986	1991	-	Sep	Sun>=11	 2:00	0	S
Rule	PRC	1987	1991	-	Apr	Sun>=11	 2:00	1:00	D

# From Anthony Fok (2001-12-20):
# BTW, I did some research on-line and found some info regarding these five
# historic timezones from some Taiwan websites.  And yes, there are official
# Chinese names for these locales (before 1949).
#
# From Jesper Nørgaard Welen (2006-07-14):
# I have investigated the timezones around 1970 on the
# https://www.astro.com/atlas site [with provinces and county
# boundaries summarized below]....  A few other exceptions were two
# counties on the Sichuan side of the Xizang-Sichuan border,
# counties Dege and Baiyu which lies on the Sichuan side and are
# therefore supposed to be GMT+7, Xizang region being GMT+6, but Dege
# county is GMT+8 according to astro.com while Baiyu county is GMT+6
# (could be true), for the moment I am assuming that those two
# counties are mistakes in the astro.com data.

# From Paul Eggert (2017-01-05):
# Alois Treindl kindly sent me translations of the following two sources:
#
# (1)
# Guo Qing-sheng (National Time-Service Center, CAS, Xi'an 710600, China)
# Beijing Time at the Beginning of the PRC
# China Historical Materials of Science and Technology
# (Zhongguo ke ji shi liao, 中国科技史料). 2003;24(1):5-9.
# http://oversea.cnki.net/kcms/detail/detail.aspx?filename=ZGKS200301000&dbname=CJFD2003
# It gives evidence that at the beginning of the PRC, Beijing time was
# officially apparent solar time!  However, Guo also says that the
# evidence is dubious, as the relevant institute of astronomy had not
# been taken over by the PRC yet.  It's plausible that apparent solar
# time was announced but never implemented, and that people continued
# to use UT+8.  As the Shanghai radio station (and I presume the
# observatory) was still under control of French missionaries, it
# could well have ignored any such mandate.
#
# (2)
# Guo Qing-sheng (Shaanxi Astronomical Observatory, CAS, Xi'an 710600, China)
# A Study on the Standard Time Changes for the Past 100 Years in China
# [undated and unknown publication location]
# It says several things:
#   * The Qing dynasty used local apparent solar time throughout China.
#   * The Republic of China instituted Beijing mean solar time effective
#     the official calendar book of 1914.
#   * The French Concession in Shanghai set up signal stations in
#     French docks in the 1890s, controlled by Xujiahui (Zikawei)
#     Observatory and set to local mean time.
#   * "From the end of the 19th century" it changed to UT+8.
#   * Chinese Customs (by then reduced to a tool of foreign powers)
#     eventually standardized on this time for all ports, and it
#     became used by railways as well.
#   * In 1918 the Central Observatory proposed dividing China into
#     five time zones (see below for details).  This caught on
#     at first only in coastal areas observing UT+8.
#   * During WWII all of China was in theory was at UT+7.  In practice
#     this was ignored in the west, and I presume was ignored in
#     Japanese-occupied territory.
#   * Japanese-occupied Manchuria was at UT+9, i.e., Japan time.
#   * The five-zone plan was resurrected after WWII and officially put into
#     place (with some modifications) in March 1948.  It's not clear
#     how well it was observed in areas under Nationalist control.
#   * The People's Liberation Army used UT+8 during the civil war.
#
# An AP article "Shanghai Internat'l Area Little Changed" in the
# Lewiston (ME) Daily Sun (1939-05-29), p 17, said "Even the time is
# different - the occupied districts going by Tokyo time, an hour
# ahead of that prevailing in the rest of Shanghai."  Guess that the
# Xujiahui Observatory was under French control and stuck with UT +08.
#
# In earlier versions of this file, China had many separate Zone entries, but
# this was based on what were apparently incorrect data in Shanks & Pottenger.
# This has now been simplified to the two entries Asia/Shanghai and
# Asia/Urumqi, with the others being links for backward compatibility.
# Proposed in 1918 and theoretically in effect until 1949 (although in practice
# mainly observed in coastal areas), the five zones were:
#
# Changbai Time ("Long-white Time", Long-white = Heilongjiang area) UT +08:30
# Now part of Asia/Shanghai; its pre-1970 times are not recorded here.
# Heilongjiang (except Mohe county), Jilin
#
# Zhongyuan Time ("Central plain Time") UT +08
# Now part of Asia/Shanghai.
# most of China
# Milne gives 8:05:43.2 for Xujiahui Observatory time....
# Guo says Shanghai switched to UT +08 "from the end of the 19th century".
#
# Long-shu Time (probably as Long and Shu were two names of the area) UT +07
# Now part of Asia/Shanghai; its pre-1970 times are not recorded here.
# Guangxi, Guizhou, Hainan, Ningxia, Sichuan, Shaanxi, and Yunnan;
# most of Gansu; west Inner Mongolia; east Qinghai; and the Guangdong
# counties Deqing, Enping, Kaiping, Luoding, Taishan, Xinxing,
# Yangchun, Yangjiang, Yu'nan, and Yunfu.
#
# Xin-zang Time ("Xinjiang-Tibet Time") UT +06
# This region is now part of either Asia/Urumqi or Asia/Shanghai with
# current boundaries uncertain; times before 1970 for areas that
# disagree with Ürümqi or Shanghai are not recorded here.
# The Gansu counties Aksay, Anxi, Dunhuang, Subei; west Qinghai;
# the Guangdong counties  Xuwen, Haikang, Suixi, Lianjiang,
# Zhanjiang, Wuchuan, Huazhou, Gaozhou, Maoming, Dianbai, and Xinyi;
# east Tibet, including Lhasa, Chamdo, Shigaise, Jimsar, Shawan and Hutubi;
# east Xinjiang, including Ürümqi, Turpan, Karamay, Korla, Minfeng, Jinghe,
# Wusu, Qiemo, Xinyan, Wulanwusu, Jinghe, Yumin, Tacheng, Tuoli, Emin,
# Shihezi, Changji, Yanqi, Heshuo, Tuokexun, Tulufan, Shanshan, Hami,
# Fukang, Kuitun, Kumukuli, Miquan, Qitai, and Turfan.
#
# Kunlun Time UT +05:30
# This region is now in the same status as Xin-zang Time (see above).
# West Tibet, including Pulan, Aheqi, Shufu, Shule;
# West Xinjiang, including Aksu, Atushi, Yining, Hetian, Cele, Luopu, Nileke,
# Zhaosu, Tekesi, Gongliu, Chabuchaer, Huocheng, Bole, Pishan, Suiding,
# and Yarkand.

# From Luther Ma (2009-10-17):
# Almost all (>99.9%) ethnic Chinese (properly ethnic Han) living in
# Xinjiang use Chinese Standard Time. Some are aware of Xinjiang time,
# but have no need of it. All planes, trains, and schools function on
# what is called "Beijing time." When Han make an appointment in Chinese
# they implicitly use Beijing time.
#
# On the other hand, ethnic Uyghurs, who make up about half the
# population of Xinjiang, typically use "Xinjiang time" which is two
# hours behind Beijing time, or UT +06. The government of the Xinjiang
# Uyghur Autonomous Region, (XAUR, or just Xinjiang for short) as well as
# local governments such as the Ürümqi city government use both times in
# publications, referring to what is popularly called Xinjiang time as
# "Ürümqi time." When Uyghurs make an appointment in the Uyghur language
# they almost invariably use Xinjiang time.
#
# (Their ethnic Han compatriots would typically have no clue of its
# widespread use, however, because so extremely few of them are fluent in
# Uyghur, comparable to the number of Anglo-Americans fluent in Navajo.)
#
# (...As with the rest of China there was a brief interval ending in 1990
# or 1991 when summer time was in use.  The confusion was severe, with
# the province not having dual times but four times in use at the same
# time. Some areas remained on standard Xinjiang time or Beijing time and
# others moving their clocks ahead.)

# From Luther Ma (2009-11-19):
# With the risk of being redundant to previous answers these are the most common
# English "transliterations" (w/o using non-English symbols):
#
# 1. Wulumuqi...
# 2. Kashi...
# 3. Urumqi...
# 4. Kashgar...
# ...
# 5. It seems that Uyghurs in Ürümqi has been using Xinjiang since at least the
# 1960's. I know of one Han, now over 50, who grew up in the surrounding
# countryside and used Xinjiang time as a child.
#
# 6. Likewise for Kashgar and the rest of south Xinjiang I don't know of any
# start date for Xinjiang time.
#
# Without having access to local historical records, nor the ability to legally
# publish them, I would go with October 1, 1949, when Xinjiang became the Uyghur
# Autonomous Region under the PRC. (Before that Uyghurs, of course, would also
# not be using Beijing time, but some local time.)

# From David Cochrane (2014-03-26):
# Just a confirmation that Ürümqi time was implemented in Ürümqi on 1 Feb 1986:
# https://content.time.com/time/magazine/article/0,9171,960684,00.html

# From Luther Ma (2014-04-22):
# I have interviewed numerous people of various nationalities and from
# different localities in Xinjiang and can confirm the information in Guo's
# report regarding Xinjiang, as well as the Time article reference by David
# Cochrane.  Whether officially recognized or not (and both are officially
# recognized), two separate times have been in use in Xinjiang since at least
# the Cultural Revolution: Xinjiang Time (XJT), aka Ürümqi Time or local time;
# and Beijing Time.  There is no confusion in Xinjiang as to which name refers
# to which time. Both are widely used in the province, although in some
# population groups might be use one to the exclusion of the other.  The only
# problem is that computers and smart phones list Ürümqi (or Kashgar) as
# having the same time as Beijing.

# From Paul Eggert (2014-06-30):
# In the early days of the PRC, Tibet was given its own time zone (UT +06)
# but this was withdrawn in 1959 and never reinstated; see Tubten Khétsun,
# Memories of life in Lhasa under Chinese Rule, Columbia U Press, ISBN
# 978-0231142861 (2008), translator's introduction by Matthew Akester, p x.
# As this is before our 1970 cutoff, Tibet doesn't need a separate zone.
#
# Xinjiang Time is well-documented as being officially recognized.  E.g., see
# "The Working-Calendar for The Xinjiang Uygur Autonomous Region Government"
# <http://www.sinkiang.gov.cn/service/ourworking/> (2014-04-22).
# Unfortunately, we have no good records of time in Xinjiang before 1986.
# During the 20th century parts of Xinjiang were ruled by the Qing dynasty,
# the Republic of China, various warlords, the First and Second East Turkestan
# Republics, the Soviet Union, the Kuomintang, and the People's Republic of
# China, and tracking down all these organizations' timekeeping rules would be
# quite a trick.  Approximate this lost history by a transition from LMT to
# UT +06 at the start of 1928, the year of accession of the warlord Jin Shuren,
# which happens to be the date given by Shanks & Pottenger (no doubt as a
# guess) as the transition from LMT.  Ignore the usage of +08 before
# 1986-02-01 under the theory that the transition date to +08 is unknown and
# that the sort of users who prefer Asia/Urumqi now typically ignored the
# +08 mandate back then.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
# Beijing time, used throughout China; represented by Shanghai.
		#STDOFF	8:05:43.2
Zone	Asia/Shanghai	8:05:43	-	LMT	1901
			8:00	Shang	C%sT	1949 May 28
			8:00	PRC	C%sT
# Xinjiang time, used by many in western China; represented by Ürümqi / Ürümchi
# / Wulumuqi.  (Please use Asia/Shanghai if you prefer Beijing time.)
Zone	Asia/Urumqi	5:50:20	-	LMT	1928
			6:00	-	%z

# Hong Kong

# Milne gives 7:36:41.7.

# From Lee Yiu Chung (2009-10-24):
# I found there are some mistakes for the...DST rule for Hong
# Kong. [According] to the DST record from Hong Kong Observatory (actually,
# it is not [an] observatory, but the official meteorological agency of HK,
# and also serves as the official timing agency), there are some missing
# and incorrect rules. Although the exact switch over time is missing, I
# think 3:30 is correct.

# From Phake Nick (2018-10-27):
# According to Singaporean newspaper
# http://eresources.nlb.gov.sg/newspapers/Digitised/Article/singfreepresswk19041102-1.2.37
# the day that Hong Kong start using GMT+8 should be Oct 30, 1904.
#
# From Paul Eggert (2018-11-17):
# Hong Kong had a time ball near the Marine Police Station, Tsim Sha Tsui.
# "The ball was raised manually each day and dropped at exactly 1pm
# (except on Sundays and Government holidays)."
# Dyson AD. From Time Ball to Atomic Clock. Hong Kong Government. 1983.
# <https://www.hko.gov.hk/publica/gen_pub/timeball_atomic_clock.pdf>
# "From 1904 October 30 the time-ball at Hong Kong has been dropped by order
# of the Governor of the Colony at 17h 0m 0s G.M.T., which is 23m 18s.14 in
# advance of 1h 0m 0s of Hong Kong mean time."
# Hollis HP. Universal Time, Longitudes, and Geodesy. Mon Not R Astron Soc.
# 1905-02-10;65(4):405-6. https://doi.org/10.1093/mnras/65.4.382
#
# From Joseph Myers (2018-11-18):
# An astronomer before 1925 referring to GMT would have been using the old
# astronomical convention where the day started at noon, not midnight.
#
# From Steve Allen (2018-11-17):
# Meteorological Observations made at the Hongkong Observatory in the year 1904
# page 4 <https://books.google.com/books?id=kgw5AQAAMAAJ&pg=RA4-PA4>
# ... the log of drop times in Table II shows that on Sunday 1904-10-30 the
# ball was dropped.  So that looks like a special case drop for the sake
# of broadcasting the new local time.
#
# From Phake Nick (2018-11-18):
# According to The Hong Kong Weekly Press, 1904-10-29, p.324, the
# governor of Hong Kong at the time stated that "We are further desired to
# make it known that the change will be effected by firing the gun and by the
# dropping of the Ball at 23min. 18sec. before one."
# From Paul Eggert (2018-11-18):
# See <https://mmis.hkpl.gov.hk> for this; unfortunately Flash is required.

# From Phake Nick (2018-10-26):
# I went to check microfilm records stored at Hong Kong Public Library....
# on September 30 1941, according to Ta Kung Pao (Hong Kong edition), it was
# stated that fallback would occur on the next day (the 1st)'s "03:00 am (Hong
# Kong Time 04:00 am)" and the clock will fall back for a half hour. (03:00
# probably refer to the time commonly used in mainland China at the time given
# the paper's background) ... the sunrise/sunset time given by South China
# Morning Post for October 1st was indeed moved by half an hour compares to
# before.  After that, in December, the battle to capture Hong Kong started and
# the library doesn't seems to have any record stored about press during that
# period of time.  Some media resumed publication soon after that within the
# same month, but there were not much information about time there.  Later they
# started including a radio program guide when they restored radio service,
# explicitly mentioning it use Tokyo standard time, and later added a note
# saying it's half an hour ahead of the old Hong Kong standard time, and it
# also seems to indicate that Hong Kong was not using GMT+8 when it was
# captured by Japan.
#
# Image of related sections on newspaper:
# * 1941-09-30, Ta Kung Pao (Hong Kong), "Winter Time start tomorrow".
#   https://i.imgur.com/6waY51Z.jpg (Chinese)
# * 1941-09-29, South China Morning Post, Information on sunrise/sunset
#   time and other things for September 30 and October 1.
#   https://i.imgur.com/kCiUR78.jpg
# * 1942-02-05. The Hong Kong News, Radio Program Guide.
#   https://i.imgur.com/eVvDMzS.jpg
# * 1941-06-14. Hong Kong Daily Press, Daylight Saving from 3am Tomorrow.
#   https://i.imgur.com/05KkvtC.png
# * 1941-09-30, Hong Kong Daily Press, Winter Time Warning.
#   https://i.imgur.com/dge4kFJ.png

# From Paul Eggert (2019-07-11):
# "Hong Kong winter time" is considered to be daylight saving.
# "Hong Kong had adopted daylight saving on June 15 as a wartime measure,
# clocks moving forward one hour until October 1, when they would be put back
# by just half an hour for 'Hong Kong Winter time', so that daylight saving
# operated year round." -- Low Z. The longest day: when wartime Hong Kong
# introduced daylight saving. South China Morning Post. 2019-06-28.
# https://www.scmp.com/magazines/post-magazine/short-reads/article/3016281/longest-day-when-wartime-hong-kong-introduced

# From P Chan (2018-12-31):
# * According to the Hong Kong Daylight-Saving Regulations, 1941, the
#   1941 spring-forward transition was at 03:00.
#	http://sunzi.lib.hku.hk/hkgro/view/g1941/304271.pdf
#	http://sunzi.lib.hku.hk/hkgro/view/g1941/305516.pdf
# * According to some articles from South China Morning Post, +08 was
#   resumed on 1945-11-18 at 02:00.
#	https://i.imgur.com/M2IsZ3c.png
#	https://i.imgur.com/iOPqrVo.png
#	https://i.imgur.com/fffcGDs.png
# * Some newspapers ... said the 1946 spring-forward transition was on
#   04-21 at 00:00.  The Kung Sheung Evening News 1946-04-20 (Chinese)
#	https://i.imgur.com/ZSzent0.png
#	https://mmis.hkpl.gov.hk///c/portal/cover?c=QF757YsWv5%2FH7zGe%2FKF%2BFLYsuqGhRBfe p.4
#   The Kung Sheung Daily News 1946-04-21 (Chinese)
#	https://i.imgur.com/7ecmRlcm.png
#	https://mmis.hkpl.gov.hk///c/portal/cover?c=QF757YsWv5%2BQBGt1%2BwUj5qG2GqtwR3Wh p.4
# * According to the Summer Time Ordinance (1946), the fallback
#   transitions between 1946 and 1952 were at 03:30 Standard Time (+08)
#	http://oelawhk.lib.hku.hk/archive/files/bb74b06a74d5294620a15de560ab33c6.pdf
# * Some other laws and regulations related to DST from 1953 to 1979
#   Summer Time Ordinance 1953
#	https://i.imgur.com/IOlJMav.jpg
#   Summer Time (Amendment) Ordinance 1965
#	https://i.imgur.com/8rofeLa.jpg
#   Interpretation and General Clauses Ordinance (1966)
#	https://i.imgur.com/joy3msj.jpg
#   Emergency (Summer Time) Regulation 1973 <https://i.imgur.com/OpRWrKz.jpg>
#   Interpretation and General Clauses (Amendment) Ordinance 1977
#	https://i.imgur.com/RaNqnc4.jpg
#   Resolution of the Legislative Council passed on 9 May 1979
#	https://www.legco.gov.hk/yr78-79/english/lc_sitg/hansard/h790509.pdf#page=39

# From Paul Eggert (2020-04-15):
# Here are the dates given at
# https://www.hko.gov.hk/en/gts/time/Summertime.htm
# as of 2020-02-10:
# Year        Period
# 1941        15 Jun to 30 Sep
# 1942        Whole year
# 1943        Whole year
# 1944        Whole year
# 1945        Whole year
# 1946        20 Apr to 1 Dec
# 1947        13 Apr to 30 Nov
# 1948        2 May to 31 Oct
# 1949        3 Apr to 30 Oct
# 1950        2 Apr to 29 Oct
# 1951        1 Apr to 28 Oct
# 1952        6 Apr to 2 Nov
# 1953        5 Apr to 1 Nov
# 1954        21 Mar to 31 Oct
# 1955        20 Mar to 6 Nov
# 1956        18 Mar to 4 Nov
# 1957        24 Mar to 3 Nov
# 1958        23 Mar to 2 Nov
# 1959        22 Mar to 1 Nov
# 1960        20 Mar to 6 Nov
# 1961        19 Mar to 5 Nov
# 1962        18 Mar to 4 Nov
# 1963        24 Mar to 3 Nov
# 1964        22 Mar to 1 Nov
# 1965        18 Apr to 17 Oct
# 1966        17 Apr to 16 Oct
# 1967        16 Apr to 22 Oct
# 1968        21 Apr to 20 Oct
# 1969        20 Apr to 19 Oct
# 1970        19 Apr to 18 Oct
# 1971        18 Apr to 17 Oct
# 1972        16 Apr to 22 Oct
# 1973        22 Apr to 21 Oct
# 1973/74     30 Dec 73 to 20 Oct 74
# 1975        20 Apr to 19 Oct
# 1976        18 Apr to 17 Oct
# 1977        Nil
# 1978        Nil
# 1979        13 May to 21 Oct
# 1980 to Now Nil
# The page does not give times of day for transitions,
# or dates for the 1942 and 1945 transitions.
# The Japanese occupation of Hong Kong began 1941-12-25.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	HK	1946	only	-	Apr	21	0:00	1:00	S
Rule	HK	1946	only	-	Dec	1	3:30s	0	-
Rule	HK	1947	only	-	Apr	13	3:30s	1:00	S
Rule	HK	1947	only	-	Nov	30	3:30s	0	-
Rule	HK	1948	only	-	May	2	3:30s	1:00	S
Rule	HK	1948	1952	-	Oct	Sun>=28	3:30s	0	-
Rule	HK	1949	1953	-	Apr	Sun>=1	3:30	1:00	S
Rule	HK	1953	1964	-	Oct	Sun>=31	3:30	0	-
Rule	HK	1954	1964	-	Mar	Sun>=18	3:30	1:00	S
Rule	HK	1965	1976	-	Apr	Sun>=16	3:30	1:00	S
Rule	HK	1965	1976	-	Oct	Sun>=16	3:30	0	-
Rule	HK	1973	only	-	Dec	30	3:30	1:00	S
Rule	HK	1979	only	-	May	13	3:30	1:00	S
Rule	HK	1979	only	-	Oct	21	3:30	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
		#STDOFF	7:36:41.7
Zone	Asia/Hong_Kong	7:36:42 -	LMT	1904 Oct 29 17:00u
			8:00	-	HKT	1941 Jun 15  3:00
			8:00	1:00	HKST	1941 Oct  1  4:00
			8:00	0:30	HKWT	1941 Dec 25
			9:00	-	JST	1945 Nov 18  2:00
			8:00	HK	HK%sT

###############################################################################

# Taiwan

# From smallufo (2010-04-03):
# According to Taiwan's CWB [Central Weather Bureau],
# http://www.cwb.gov.tw/V6/astronomy/cdata/summert.htm
# Taipei has DST in 1979 between July 1st and Sep 30.

# From Yu-Cheng Chuang (2013-07-12):
# On Dec 28, 1895, the Meiji Emperor announced Ordinance No. 167 of
# Meiji Year 28 "The clause about standard time", mentioned that
# Taiwan and Penghu Islands, as well as Yaeyama and Miyako Islands
# (both in Okinawa) adopt the Western Standard Time which is based on
# 120E. The adoption began from Jan 1, 1896. The original text can be
# found on Wikisource:
# https://ja.wikisource.org/wiki/標準時ニ關スル件_(公布時)
# ... This could be the first adoption of time zone in Taiwan, because
# during the Qing Dynasty, it seems that there was no time zone
# declared officially.
#
# Later, in the beginning of World War II, on Sep 25, 1937, the Showa
# Emperor announced Ordinance No. 529 of Showa Year 12 "The clause of
# revision in the ordinance No. 167 of Meiji year 28 about standard
# time", in which abolished the adoption of Western Standard Time in
# western islands (listed above), which means the whole Japan
# territory, including later occupations, adopt Japan Central Time
# (UT+9). The adoption began on Oct 1, 1937. The original text can
# be found on Wikisource:
# https://ja.wikisource.org/wiki/明治二十八年勅令第百六十七號標準時ニ關スル件中改正ノ件
#
# That is, the time zone of Taipei switched to UT+9 on Oct 1, 1937.

# From Yu-Cheng Chuang (2014-07-02):
# I've found more evidence about when the time zone was switched from UT+9
# back to UT+8 after WW2.  I believe it was on Sep 21, 1945.  In a document
# during Japanese era [1] in which the officer told the staff to change time
# zone back to Western Standard Time (UT+8) on Sep 21.  And in another
# history page of National Cheng Kung University [2], on Sep 21 there is a
# note "from today, switch back to Western Standard Time".  From these two
# materials, I believe that the time zone change happened on Sep 21.  And
# today I have found another monthly journal called "The Astronomical Herald"
# from The Astronomical Society of Japan [3] in which it mentioned the fact
# that:
#
# 1. Standard Time of the Country (Japan) was adopted on Jan 1, 1888, using
# the time at 135E (GMT+9)
#
# 2. Standard Time of the Country was renamed to Central Standard Time, on Jan
# 1, 1898, and on the same day, the new territories Taiwan and Penghu islands,
# as well as Yaeyama and Miyako islands, adopted a new time zone called
# Western Standard Time, which is in GMT+8.
#
# 3. Western Standard Time was deprecated on Sep 30, 1937. From then all the
# territories of Japan adopted the same time zone, which is Central Standard
# Time.
#
# [1] Academica Historica, Taiwan:
# http://163.29.208.22:8080/govsaleShowImage/connect_img.php?s=00101738900090036&e=00101738900090037
# [2] Nat'l Cheng Kung University 70th Anniversary Special Site:
# http://www.ncku.edu.tw/~ncku70/menu/001/01_01.htm
# [3] Yukio Niimi, The Standard Time in Japan (1997), p.475:
# http://www.asj.or.jp/geppou/archive_open/1997/pdf/19971001c.pdf

# Yu-Cheng Chuang (2014-07-03):
# I finally have found the real official gazette about changing back to
# Western Standard Time on Sep 21 in Taiwan.  It's Taiwan Governor-General
# Bulletin No. 386 in Showa 20 years (1945), published on Sep 19, 1945. [1] ...
# [It] abolishes Bulletin No. 207 in Showa 12 years (1937), which is a local
# bulletin in Taiwan for that Ordinance No. 529. It also mentioned that 1am on
# Sep 21, 1945 will be 12am on Sep 21.  I think this bulletin is much more
# official than the one I mentioned in my first mail, because it's from the
# top-level government in Taiwan. If you're going to quote any resource, this
# would be a good one.
# [1] Taiwan Governor-General Gazette, No. 1018, Sep 19, 1945:
# http://db2.th.gov.tw/db2/view/viewImg.php?imgcode=0072031018a&num=19&bgn=019&end=019&otherImg=&type=gener

# From Yu-Cheng Chuang (2014-07-02):
# In 1946, DST in Taiwan was from May 15 and ended on Sep 30. The info from
# Central Weather Bureau website was not correct.
#
# Original Bulletin:
# http://subtpg.tpg.gov.tw/og/image2.asp?f=03502F0AKM1AF
# http://subtpg.tpg.gov.tw/og/image2.asp?f=0350300AKM1B0 (cont.)
#
# In 1947, DST in Taiwan was expanded to Oct 31. There is a backup of that
# telegram announcement from Taiwan Province Government:
#
# http://subtpg.tpg.gov.tw/og/image2.asp?f=0360310AKZ431
#
# Here is a brief translation:
#
#   The Summer Time this year is adopted from midnight Apr 15 until Sep 20
#   midnight. To save (energy?) consumption, we're expanding Summer Time
#   adoption till Oct 31 midnight.
#
# The Central Weather Bureau website didn't mention that, however it can
# be found from historical government announcement database.

# From Paul Eggert (2014-07-03):
# As per Yu-Cheng Chuang, say that Taiwan was at UT +09 from 1937-10-01
# until 1945-09-21 at 01:00, overriding Shanks & Pottenger.
# Likewise, use Yu-Cheng Chuang's data for DST in Taiwan.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Taiwan	1946	only	-	May	15	0:00	1:00	D
Rule	Taiwan	1946	only	-	Oct	1	0:00	0	S
Rule	Taiwan	1947	only	-	Apr	15	0:00	1:00	D
Rule	Taiwan	1947	only	-	Nov	1	0:00	0	S
Rule	Taiwan	1948	1951	-	May	1	0:00	1:00	D
Rule	Taiwan	1948	1951	-	Oct	1	0:00	0	S
Rule	Taiwan	1952	only	-	Mar	1	0:00	1:00	D
Rule	Taiwan	1952	1954	-	Nov	1	0:00	0	S
Rule	Taiwan	1953	1959	-	Apr	1	0:00	1:00	D
Rule	Taiwan	1955	1961	-	Oct	1	0:00	0	S
Rule	Taiwan	1960	1961	-	Jun	1	0:00	1:00	D
Rule	Taiwan	1974	1975	-	Apr	1	0:00	1:00	D
Rule	Taiwan	1974	1975	-	Oct	1	0:00	0	S
Rule	Taiwan	1979	only	-	Jul	1	0:00	1:00	D
Rule	Taiwan	1979	only	-	Oct	1	0:00	0	S

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
# Taipei or Taibei or T'ai-pei
Zone	Asia/Taipei	8:06:00 -	LMT	1896 Jan  1
			8:00	-	CST	1937 Oct  1
			9:00	-	JST	1945 Sep 21  1:00
			8:00	Taiwan	C%sT

# Macau (Macao, Aomen)
#
# From P Chan (2018-05-10):
# * LegisMac
#   http://legismac.safp.gov.mo/legismac/descqry/Descqry.jsf?lang=pt
#   A database for searching titles of legal documents of Macau in
#   Chinese and Portuguese.  The term "HORÁRIO DE VERÃO" can be used for
#   searching decrees about summer time.
# * Archives of Macao
#   http://www.archives.gov.mo/en/bo/
#   It contains images of old official gazettes.
# * The Macao Meteorological and Geophysical Bureau have a page listing the
#   summer time history.  But it is not complete and has some mistakes.
#   http://www.smg.gov.mo/smg/geophysics/e_t_Summer%20Time.htm
# Macau adopted GMT+8 on 30 Oct 1904 to follow Hong Kong.  Clocks were
# advanced by 25 minutes and 50 seconds.  Which means the LMT used was
# +7:34:10.  As stated in the "Portaria No. 204" dated 21 October 1904
# and published in the Official Gazette on 29 October 1904.
# http://igallery.icm.gov.mo/Images/Archives/BO/MO_AH_PUB_BO_1904_10/MO_AH_PUB_BO_1904_10_00025_Grey.JPG
#
# Therefore the 1911 decree of Portugal did not change time in Macau.
#
# From LegisMac, here is a list of decrees that changed the time ...
# [Decree Gazette-no. date; titles omitted in this quotation]
#	DIL 732 BOCM 51 1941.12.20
#	DIL 764 BOCM 9S 1942.04.30
#	DIL 781 BOCM 21 1942.10.10
#	PT 3434 BOCM 8S 1943.04.17
#	PT 3504 BOCM 20 1943.09.25
#	PT 3843 BOCM 39 1945.09.29
#	PT 3961 BOCM 17 1946.04.27
#	PT 4026 BOCM 39 1946.09.28
#	PT 4153 BOCM 16 1947.04.10
#	PT 4271 BOCM 48 1947.11.29
#	PT 4374 BOCM 18 1948.05.01
#	PT 4465 BOCM 44 1948.10.30
#	PT 4590 BOCM 14 1949.04.02
#	PT 4666 BOCM 44 1949.10.29
#	PT 4771 BOCM 12 1950.03.25
#	PT 4838 BOCM 43 1950.10.28
#	PT 4946 BOCM 12 1951.03.24
#	PT 5025 BO 43 1951.10.27
#	PT 5149 BO 14 1952.04.05
#	PT 5251 BO 43 1952.10.25
#	PT 5366 BO 13 1953.03.28
#	PT 5444 BO 44 1953.10.31
#	PT 5540 BO 12 1954.03.20
#	PT 5589 BO 44 1954.10.30
#	PT 5676 BO 12 1955.03.19
#	PT 5739 BO 45 1955.11.05
#	PT 5823 BO 11 1956.03.17
#	PT 5891 BO 44 1956.11.03
#	PT 5981 BO 12 1957.03.23
#	PT 6064 BO 43 1957.10.26
#	PT 6172 BO 12 1958.03.22
#	PT 6243 BO 43 1958.10.25
#	PT 6341 BO 12 1959.03.21
#	PT 6411 BO 43 1959.10.24
#	PT 6514 BO 11 1960.03.12
#	PT 6584 BO 44 1960.10.29
#	PT 6721 BO 10 1961.03.11
#	PT 6815 BO 43 1961.10.28
#	PT 6947 BO 10 1962.03.10
#	PT 7080 BO 43 1962.10.27
#	PT 7218 BO 12 1963.03.23
#	PT 7340 BO 43 1963.10.26
#	PT 7491 BO 11 1964.03.14
#	PT 7664 BO 43 1964.10.24
#	PT 7846 BO 15 1965.04.10
#	PT 7979 BO 42 1965.10.16
#	PT 8146 BO 15 1966.04.09
#	PT 8252 BO 41 1966.10.08
#	PT 8429 BO 15 1967.04.15
#	PT 8540 BO 41 1967.10.14
#	PT 8735 BO 15 1968.04.13
#	PT 8860 BO 41 1968.10.12
#	PT 9035 BO 16 1969.04.19
#	PT 9156 BO 42 1969.10.18
#	PT 9328 BO 15 1970.04.11
#	PT 9418 BO 41 1970.10.10
#	PT 9587 BO 14 1971.04.03
#	PT 9702 BO 41 1971.10.09
#	PT 38-A/72 BO 14 1972.04.01
#	PT 126-A/72 BO 41 1972.10.07
#	PT 61/73 BO 14 1973.04.07
#	PT 182/73 BO 40 1973.10.06
#	PT 282/73 BO 51 1973.12.22
#	PT 177/74 BO 41 1974.10.12
#	PT 51/75 BO 15 1975.04.12
#	PT 173/75 BO 41 1975.10.11
#	PT 67/76/M BO 14 1976.04.03
#	PT 169/76/M BO 41 1976.10.09
#	PT 78/79/M BO 19 1979.05.12
#	PT 166/79/M BO 42 1979.10.20
# Note that DIL 732 does not belong to "HORÁRIO DE VERÃO" according to
# LegisMac.... Note that between 1942 and 1945, the time switched
# between GMT+9 and GMT+10.  Also in 1965 and 1965 the DST ended at 2:30am.

# From Paul Eggert (2018-05-10):
# The 1904 decree says that Macau changed from the meridian of
# Fortaleza do Monte, presumably the basis for the 7:34:10 for LMT.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Macau	1942	1943	-	Apr	30	23:00	1:00	-
Rule	Macau	1942	only	-	Nov	17	23:00	0	-
Rule	Macau	1943	only	-	Sep	30	23:00	0	S
Rule	Macau	1946	only	-	Apr	30	23:00s	1:00	D
Rule	Macau	1946	only	-	Sep	30	23:00s	0	S
Rule	Macau	1947	only	-	Apr	19	23:00s	1:00	D
Rule	Macau	1947	only	-	Nov	30	23:00s	0	S
Rule	Macau	1948	only	-	May	 2	23:00s	1:00	D
Rule	Macau	1948	only	-	Oct	31	23:00s	0	S
Rule	Macau	1949	1950	-	Apr	Sat>=1	23:00s	1:00	D
Rule	Macau	1949	1950	-	Oct	lastSat	23:00s	0	S
Rule	Macau	1951	only	-	Mar	31	23:00s	1:00	D
Rule	Macau	1951	only	-	Oct	28	23:00s	0	S
Rule	Macau	1952	1953	-	Apr	Sat>=1	23:00s	1:00	D
Rule	Macau	1952	only	-	Nov	 1	23:00s	0	S
Rule	Macau	1953	1954	-	Oct	lastSat	23:00s	0	S
Rule	Macau	1954	1956	-	Mar	Sat>=17	23:00s	1:00	D
Rule	Macau	1955	only	-	Nov	 5	23:00s	0	S
Rule	Macau	1956	1964	-	Nov	Sun>=1	03:30	0	S
Rule	Macau	1957	1964	-	Mar	Sun>=18	03:30	1:00	D
Rule	Macau	1965	1973	-	Apr	Sun>=16	03:30	1:00	D
Rule	Macau	1965	1966	-	Oct	Sun>=16	02:30	0	S
Rule	Macau	1967	1976	-	Oct	Sun>=16	03:30	0	S
Rule	Macau	1973	only	-	Dec	30	03:30	1:00	D
Rule	Macau	1975	1976	-	Apr	Sun>=16	03:30	1:00	D
Rule	Macau	1979	only	-	May	13	03:30	1:00	D
Rule	Macau	1979	only	-	Oct	Sun>=16	03:30	0	S

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Macau	7:34:10 -	LMT	1904 Oct 30
			8:00	-	CST	1941 Dec 21 23:00
			9:00	Macau	%z	1945 Sep 30 24:00
			8:00	Macau	C%sT


###############################################################################

# Cyprus

# Milne says the Eastern Telegraph Company used 2:14:00.  Stick with LMT.
# IATA SSIM (1998-09) has Cyprus using EU rules for the first time.

# From Paul Eggert (2016-09-09):
# Yesterday's Cyprus Mail reports that Northern Cyprus followed Turkey's
# lead and switched from +02/+03 to +03 year-round.
# http://cyprus-mail.com/2016/09/08/two-time-zones-cyprus-turkey-will-not-turn-clocks-back-next-month/
#
# From Even Scharning (2016-10-31):
# Looks like the time zone split in Cyprus went through last night.
# http://cyprus-mail.com/2016/10/30/cyprus-new-division-two-time-zones-now-reality/

# From Paul Eggert (2017-10-18):
# Northern Cyprus will reinstate winter time on October 29, thus
# staying in sync with the rest of Cyprus.  See: Anastasiou A.
# Cyprus to remain united in time.  Cyprus Mail 2017-10-17.
# https://cyprus-mail.com/2017/10/17/cyprus-remain-united-time/

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Cyprus	1975	only	-	Apr	13	0:00	1:00	S
Rule	Cyprus	1975	only	-	Oct	12	0:00	0	-
Rule	Cyprus	1976	only	-	May	15	0:00	1:00	S
Rule	Cyprus	1976	only	-	Oct	11	0:00	0	-
Rule	Cyprus	1977	1980	-	Apr	Sun>=1	0:00	1:00	S
Rule	Cyprus	1977	only	-	Sep	25	0:00	0	-
Rule	Cyprus	1978	only	-	Oct	2	0:00	0	-
Rule	Cyprus	1979	1997	-	Sep	lastSun	0:00	0	-
Rule	Cyprus	1981	1998	-	Mar	lastSun	0:00	1:00	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Nicosia	2:13:28 -	LMT	1921 Nov 14
			2:00	Cyprus	EE%sT	1998 Sep
			2:00	EUAsia	EE%sT
Zone	Asia/Famagusta	2:15:48	-	LMT	1921 Nov 14
			2:00	Cyprus	EE%sT	1998 Sep
			2:00	EUAsia	EE%sT	2016 Sep  8
			3:00	-	%z	2017 Oct 29 1:00u
			2:00	EUAsia	EE%sT

# Georgia
# From Paul Eggert (1994-11-19):
# Today's _Economist_ (p 60) reports that Georgia moved its clocks forward
# an hour recently, due to a law proposed by Zurab Murvanidze,
# an MP who went on a hunger strike for 11 days to force discussion about it!
# We have no details, but we'll guess they didn't move the clocks back in fall.
#
# From Mathew Englander, quoting AP (1996-10-23 13:05-04):
# Instead of putting back clocks at the end of October, Georgia
# will stay on daylight savings time this winter to save energy,
# President Eduard Shevardnadze decreed Wednesday.
#
# From the BBC via Joseph S. Myers (2004-06-27):
#
# Georgia moved closer to Western Europe on Sunday...  The former Soviet
# republic has changed its time zone back to that of Moscow.  As a result it
# is now just four hours ahead of Greenwich Mean Time, rather than five hours
# ahead.  The switch was decreed by the pro-Western president of Georgia,
# Mikheil Saakashvili, who said the change was partly prompted by the process
# of integration into Europe.

# From Teimuraz Abashidze (2005-11-07):
# Government of Georgia ... decided to NOT CHANGE daylight savings time on
# [Oct.] 30, as it was done before during last more than 10 years.
# Currently, we are in fact GMT +4:00, as before 30 October it was GMT
# +3:00.... The problem is, there is NO FORMAL LAW or governmental document
# about it.  As far as I can find, I was told, that there is no document,
# because we just DIDN'T ISSUE document about switching to winter time....
# I don't know what can be done, especially knowing that some years ago our
# DST rules where changed THREE TIMES during one month.

# Milne 1899 says Tbilisi (Tiflis) time was 2:59:05.7.
# Byalokoz 1919 says Georgia was 2:59:11.
# Go with Byalokoz.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Tbilisi	2:59:11 -	LMT	1880
			2:59:11	-	TBMT	1924 May  2 # Tbilisi Mean Time
			3:00	-	%z	1957 Mar
			4:00 RussiaAsia %z	1991 Mar 31  2:00s
			3:00 RussiaAsia %z	1992
			3:00 E-EurAsia	%z	1994 Sep lastSun
			4:00 E-EurAsia	%z	1996 Oct lastSun
			4:00	1:00	%z	1997 Mar lastSun
			4:00 E-EurAsia	%z	2004 Jun 27
			3:00 RussiaAsia	%z	2005 Mar lastSun  2:00
			4:00	-	%z

# East Timor

# From Tim Parenti (2024-07-01):
# The 1912-01-01 transition occurred at 00:00 new time, per the 1911-05-24
# Portuguese decree (see Europe/Lisbon).  A provision in article 5(c) of the
# decree prescribed that Timor "will keep counting time in harmony with
# neighboring foreign colonies, [for] as long as they do not adopt the time
# that belongs to them in [the Washington Convention] system."

# See Indonesia for the 1945 transition.

# From João Carrascalão, brother of the former governor of East Timor, in
# East Timor may be late for its millennium
# <https://etan.org/et99c/december/26-31/30ETMAY.htm> (1999-12-26/31):
# Portugal tried to change the time forward in 1974 because the sun
# rises too early but the suggestion raised a lot of problems with the
# Timorese and I still don't think it would work today because it
# conflicts with their way of life.

# From Paul Eggert (2000-12-04):
# We don't have any record of the above attempt.
# Most likely our records are incomplete, but we have no better data.

# From Manoel de Almeida e Silva, Deputy Spokesman for the UN Secretary-General
# http://www.hri.org/news/world/undh/2000/00-08-16.undh.html
# (2000-08-16):
# The Cabinet of the East Timor Transition Administration decided
# today to advance East Timor's time by one hour.  The time change,
# which will be permanent, with no seasonal adjustment, will happen at
# midnight on Saturday, September 16.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Dili	8:22:20 -	LMT	1911 Dec 31 16:00u
			8:00	-	%z	1942 Feb 21 23:00
			9:00	-	%z	1976 May  3
			8:00	-	%z	2000 Sep 17  0:00
			9:00	-	%z

# India

# British astronomer Henry Park Hollis disliked India Standard Time's offset:
# "A new time system has been proposed for India, Further India, and Burmah.
# The scheme suggested is that the times of the meridians 5½ and 6½ hours
# east of Greenwich should be adopted in these territories.  No reason is
# given why hourly meridians five hours and six hours east should not be
# chosen; a plan which would bring the time of India into harmony with
# that of almost the whole of the civilised world."
# Hollis HP. Universal Time, Longitudes, and Geodesy. Mon Not R Astron Soc.
# 1905-02-10;65(4):405-6. https://doi.org/10.1093/mnras/65.4.382

# From Ian P. Beacock, in "A brief history of (modern) time", The Atlantic
# https://www.theatlantic.com/technology/archive/2015/12/the-creation-of-modern-time/421419/
# (2015-12-22):
# In January 1906, several thousand cotton-mill workers rioted on the
# outskirts of Bombay....  They were protesting the proposed abolition of
# local time in favor of Indian Standard Time....  Journalists called this
# dispute the "Battle of the Clocks."  It lasted nearly half a century.

# From Paul Eggert (2017-04-20):
# Good luck trying to nail down old timekeeping records in India.
# "... in the nineteenth century ... Madras Observatory took its magnetic
# measurements on Göttingen time, its meteorological measurements on Madras
# (local) time, dropped its time ball on Greenwich (ocean navigator's) time,
# and distributed civil (local time)." -- Bartky IR. Selling the true time:
# 19th-century timekeeping in america. Stanford U Press (2000), 247 note 19.
# "A more potent cause of resistance to the general adoption of the present
# standard time lies in the fact that it is Madras time.  The citizen of
# Bombay, proud of being 'primus in Indis' and of Calcutta, equally proud of
# his city being the Capital of India, and - for a part of the year - the Seat
# of the Supreme Government, alike look down on Madras, and refuse to change
# the time they are using, for that of what they regard as a benighted
# Presidency; while Madras, having for long given the standard time to the
# rest of India, would resist the adoption of any other Indian standard in its
# place." -- Oldham RD. On Time in India: a suggestion for its improvement.
# Proceedings of the Asiatic Society of Bengal (April 1899), 49-55.
#
# "In 1870 ... Madras time - 'now used by the telegraph and regulated from the
# only government observatory' - was suggested as a standard railway time,
# first to be adopted on the Great Indian Peninsular Railway (GIPR)....
# Calcutta, Bombay, and Karachi, were to be allowed to continue with their
# local time for civil purposes." - Prasad R. Tracks of Change: Railways and
# Everyday Life in Colonial India. Cambridge University Press (2016), 145.
#
# Reed S, Low F. The Indian Year Book 1936-37. Bennett, Coleman, pp 27-8.
# https://archive.org/details/in.ernet.dli.2015.282212
# This lists +052110 as Madras local time used in railways, and says that on
# 1906-01-01 railways and telegraphs in India switched to +0530.  Some
# municipalities retained their former time, and the time in Calcutta
# continued to depend on whether you were at the railway station or at
# government offices.  Government time was at +055320 (according to Shanks) or
# at +0554 (according to the Indian Year Book).  Railway time is more
# appropriate for our purposes, as it was better documented, it is what we do
# elsewhere (e.g., Europe/London before 1880), and after 1906 it was
# consistent in the region now identified by Asia/Kolkata.  So, use railway
# time for 1870-1941.  Shanks is our only (and dubious) source for the
# 1941-1945 data.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Kolkata	5:53:28 -	LMT	1854 Jun 28 # Kolkata
			5:53:20	-	HMT	1870	    # Howrah Mean Time?
			5:21:10	-	MMT	1906 Jan  1 # Madras local time
			5:30	-	IST	1941 Oct
			5:30	1:00	%z	1942 May 15
			5:30	-	IST	1942 Sep
			5:30	1:00	%z	1945 Oct 15
			5:30	-	IST
# Since 1970 the following are like Asia/Kolkata:
#	Andaman Is
#	Lakshadweep (Laccadive, Minicoy and Amindivi Is)
#	Nicobar Is

# Indonesia
#
# From Paul Eggert (2014-09-06):
# The 1876 Report of the Secretary of the [US] Navy, p 306 says that Batavia
# civil time was 7:07:12.5.
#
# From Gwillim Law (2001-05-28), overriding Shanks & Pottenger:
# http://www.sumatera-inc.com/go_to_invest/about_indonesia.asp#standtime
# says that Indonesia's time zones changed on 1988-01-01.  Looking at some
# time zone maps, I think that must refer to Western Borneo (Kalimantan Barat
# and Kalimantan Tengah) switching from UTC+8 to UTC+7.
#
# From Paul Eggert (2007-03-10):
# Here is another correction to Shanks & Pottenger.
# JohnTWB writes that Japanese forces did not surrender control in
# Indonesia until 1945-09-01 00:00 at the earliest (in Jakarta) and
# other formal surrender ceremonies were September 9, 11, and 13, plus
# September 12 for the regional surrender to Mountbatten in Singapore.
# These would be the earliest possible times for a change.
# Régimes horaires pour le monde entier, by Henri Le Corre, (Éditions
# Traditionnelles, 1987, Paris) says that Java and Madura switched
# from UT +09 to +07:30 on 1945-09-23, and gives 1944-09-01 for Jayapura
# (Hollandia).  For now, assume all Indonesian locations other than Jayapura
# switched on 1945-09-23.
#
# From Paul Eggert (2013-08-11):
# Normally the tz database uses English-language abbreviations, but in
# Indonesia it's typical to use Indonesian-language abbreviations even
# when writing in English.  For example, see the English-language
# summary published by the Time and Frequency Laboratory of the
# Research Center for Calibration, Instrumentation and Metrology,
# Indonesia, <http://time.kim.lipi.go.id/time-eng.php> (2006-09-29).
# The time zone abbreviations and UT offsets are:
#
# WIB  - +07 - Waktu Indonesia Barat (Indonesia western time)
# WITA - +08 - Waktu Indonesia Tengah (Indonesia central time)
# WIT  - +09 - Waktu Indonesia Timur (Indonesia eastern time)
#
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
# Java, Sumatra
		#STDOFF	7:07:12.5
Zone Asia/Jakarta	7:07:12 -	LMT	1867 Aug 10
# Shanks & Pottenger say the next transition was at 1924 Jan 1 0:13,
# but this must be a typo.
			7:07:12	-	BMT	1923 Dec 31 16:40u # Batavia
			7:20	-	%z	1932 Nov
			7:30	-	%z	1942 Mar 23
			9:00	-	%z	1945 Sep 23
			7:30	-	%z	1948 May
			8:00	-	%z	1950 May
			7:30	-	%z	1964
			7:00	-	WIB
# west and central Borneo
Zone Asia/Pontianak	7:17:20	-	LMT	1908 May
			7:17:20	-	PMT	1932 Nov    # Pontianak MT
			7:30	-	%z	1942 Jan 29
			9:00	-	%z	1945 Sep 23
			7:30	-	%z	1948 May
			8:00	-	%z	1950 May
			7:30	-	%z	1964
			8:00	-	WITA	1988 Jan  1
			7:00	-	WIB
# Sulawesi, Lesser Sundas, east and south Borneo
Zone Asia/Makassar	7:57:36 -	LMT	1920
			7:57:36	-	MMT	1932 Nov    # Macassar MT
			8:00	-	%z	1942 Feb  9
			9:00	-	%z	1945 Sep 23
			8:00	-	WITA
# Maluku Islands, West Papua, Papua
Zone Asia/Jayapura	9:22:48 -	LMT	1932 Nov
			9:00	-	%z	1944 Sep  1
			9:30	-	%z	1964
			9:00	-	WIT

# Iran

# From Roozbeh Pournader (2022-05-30):
# Here's an order from the Cabinet to the rest of the government to switch to
# Tehran time, which is mentioned to be already at +03:30:
# https://qavanin.ir/Law/TreeText/180138
# Just in case that goes away, I also saved a copy at archive.org:
# https://web.archive.org/web/20220530111940/https://qavanin.ir/Law/TreeText/180138
# Here's my translation:
#
# "Circular on Matching the Hours of Governmental and Official Circles
# in Provinces
# Approved 1314/03/22 [=1935-06-13]
# According to the ruling of the Honorable Cabinet, it is ordered that from
# now on in all internal provinces of the country, governmental and official
# circles set their time to match Tehran time (three hours and half before
# Greenwich)....
#
# I still haven't found out when Tehran itself switched to +03:30....
#
# From Paul Eggert (2022-06-05):
# Although the above says Tehran was at +03:30 before 1935-06-13, we don't
# know when it switched to +03:30.  For now, use 1935-06-13 as the switch date.
# Although most likely wrong, we have no better info.

# From Roozbeh Pournader (2022-06-01):
# This is from Kayhan newspaper, one of the major Iranian newspapers, from
# March 20, 1978, page 2:
#
# "Pull the clocks 60 minutes forward
# As we informed before, from the fourth day of the month Farvardin of the
# new year [=1978-03-24], clocks will be pulled forward, and people's daily
# work and life program will start one hour earlier than the current program.
# On the 1st day of the month Farvardin of this year [=1977-03-21], they had
# pulled the clocks forward by one hour, but in the month of Mehr
# [=1977-09-23], the clocks were pulled back by 30 minutes.
# In this way, from the 4th day of the month Farvardin, clocks will be ahead
# of the previous years by one hour and a half.
# According to the new program, during the night of 4th of Farvardin, when
# the midnight, meaning 24 o'clock is announced, the hands of the clock must
# be pulled forward by one hour and thus consider midnight 1 o'clock in the
# forenoon."
#
# This implies that in September 1977, when the daylight savings time was
# done with, Iran didn't go back to +03:30, but immediately to +04:00.
#
#
# This is from the major Iranian newspaper Ettela'at, dated [1978-08-03]...,
# page 32. It looks like they decided to get the clocks back to +4:00
# just in time for Ramadan that year:
#
# "Tomorrow Night, Pull the Clocks Back by One Hour
# At 1 o'clock in the forenoon of Saturday 14 Mordad [=1978-08-05], the
# clocks will be pulled one hour back and instead of 1 o'clock in the
# forenoon, Radio Iran will announce 24 o'clock.
# This decision was made in the Cabinet of Ministers meeting of 25 Tir
# [=1978-07-16], [...]
# At the beginning of the year 2537 [=March 1978: Iran was using a different
# year number for a few years then, based on the Coronation of Cyrus the
# Great], the country's official time was pulled forward by one hour and now
# the official time is one hour and a half ahead compared to last year,
# because in Farvardin of last year [=March 1977], the official time was
# pulled forward one hour and this continued until the second half of last
# year [=September 1977] until in the second half of last year the official
# time was pulled back half an hour and that half hour still remains."
#
# This matches the time of the true noon published in the newspapers, as they
# clearly go from +05:00 to +04:00 after that date (which happened during a
# long weekend in Iran).

# From Roozbeh Pournader (2022-05-31):
# [Movahedi S. Cultural preconceptions of time: Can we use operational time
# to meddle in God's Time? Comp Stud Soc Hist. 1985;27(3):385-400]
# https://www.jstor.org/stable/178704
# Here's the quotes from the paper:
# 1. '"Iran's official time keeper moved the clock one hour forward as from
# March 22, 1977 (Farvardin 2, 2536) to make maximum use of daylight and save
# in energy consumption. Thus Iran joined such other countries as Britain in
# observing what is known as 'daylight saving.' The proposal was originally
# put forward by the Ministry of Energy, in no way having any influence on
# observing religious ceremonies. Moving time one hour forward in summer
# means that at 11:00 o'clock on March 21, the official time was set as
# midnight March 22. Then September 24 will actually begin one hour later
# than the end of September 23 [...]." Iran's time base thus continued to be
# Greenwich Mean Time plus three and one-half hours (plus four and one-half
# hours in summer).'
#
# The article sources this from Iran Almanac and Book of Facts, 1977, Tehran:
# Echo of Iran, which is on Google Books at
# https://www.google.com/books/edition/Iran_Almanac_and_Book_of_Facts/9ybVAAAAMAAJ.
# (I confirmed it by searching for snippets.)
#
# 2. "After the fall of the shah, the revolutionary government returned to
# daylight-saving time (DST) on 26 May 1979."
#
# This seems to have been announced just one day in advance, on 25 May 1979.
#
# The change in 1977 clearly seems to be the first daylight savings effort in
# Iran. But the article doesn't mention what happened in 1978 (which was
# still during the shah's government), or how things continued in 1979
# onwards (which was during the Islamic Republic).

# From Francis Santoni (2022-06-01):
# for Iran and 1977 the effective change is only 20 October
# (UIT No. 143 17.XI.1977) and not 23 September (UIT No. 141 13.IX.1977).
# UIT is the Operational Bulletin of International Telecommunication Union.

# From Roozbeh Pournader (2025-03-18):
# ... the exact time of Iran's transition from +0400 to +0330 ... was Friday
# 1357/8/19 AP=1978-11-10. Here's a newspaper clip from the Ettela'at
# newspaper, dated 1357/8/14 AP=1978-11-05, translated from Persian
# (at https://w.wiki/DUEY):
#	Following the government's decision about returning the official time
#	to the previous status, the spokesperson for the Ministry of Energy
#	announced today: At the hour 24 of Friday 19th of Aban (=1978-11-10),
#	the country's time will be pulled back half an hour.
#
# From Roozbeh Pournader (2003-03-15):
# This is an English translation of what I just found (originally in Persian).
# The Gregorian dates in brackets are mine:
#
#	Official Newspaper No. 13548-1370/6/25 [1991-09-16]
#	No. 16760/T233 H				1370/6/10 [1991-09-01]
#
#	The Rule About Change of the Official Time of the Country
#
#	The Board of Ministers, in the meeting dated 1370/5/23 [1991-08-14],
#	based on the suggestion number 2221/D dated 1370/4/22 [1991-07-13]
#	of the Country's Organization for Official and Employment Affairs,
#	and referring to the law for equating the working hours of workers
#	and officers in the whole country dated 1359/4/23 [1980-07-14], and
#	for synchronizing the official times of the country, agreed that:
#
#	The official time of the country will should move forward one hour
#	at the 24[:00] hours of the first day of Farvardin and should return
#	to its previous state at the 24[:00] hours of the 30th day of
#	Shahrivar.
#
#	First Deputy to the President - Hassan Habibi
#
# From personal experience, that agrees with what has been followed
# for at least the last 5 years.  Before that, for a few years, the
# date used was the first Thursday night of Farvardin and the last
# Thursday night of Shahrivar, but I can't give exact dates....
#
# From Roozbeh Pournader (2005-04-05):
# The text of the Iranian law, in effect since 1925, clearly mentions
# that the true solar year is the measure, and there is no arithmetic
# leap year calculation involved.  There has never been any serious
# plan to change that law....
#
# From Paul Eggert (2022-06-30):
# Go with Pournader for 1935 through spring 1979, and for timestamps
# after August 1991; go with with Shanks & Pottenger for other timestamps.
# Go with Santoni's citation of the UIT for fall 1977, as 20 October 1977
# is 28 Mehr 1356, consistent with the "Mehr" in Pournader's source.
# Assume that the UIT's "1930" is UTC, i.e., 24:00 local time.
#
# From Oscar van Vlijmen (2005-03-30), writing about future
# discrepancies between cal-persia and the Iranian calendar:
# For 2091 solar-longitude-after yields 2091-03-20 08:40:07.7 UT for
# the vernal equinox and that gets so close to 12:00 some local
# Iranian time that the definition of the correct location needs to be
# known exactly, amongst other factors.  2157 is even closer:
# 2157-03-20 08:37:15.5 UT.  But the Gregorian year 2025 should give
# no interpretation problem whatsoever.  By the way, another instant
# in the near future where there will be a discrepancy between
# arithmetical and astronomical Iranian calendars will be in 2058:
# vernal equinox on 2058-03-20 09:03:05.9 UT.  The Java version of
# Reingold's/Dershowitz' calculator gives correctly the Gregorian date
# 2058-03-21 for 1 Farvardin 1437 (astronomical).
#
# From Steffen Thorsen (2006-03-22):
# Several of my users have reported that Iran will not observe DST anymore:
# http://www.irna.ir/en/news/view/line-17/0603193812164948.htm
#
# From Reuters (2007-09-16), with a heads-up from Jesper Nørgaard Welen:
# ... the Guardian Council ... approved a law on Sunday to re-introduce
# daylight saving time ...
# https://uk.reuters.com/article/oilRpt/idUKBLA65048420070916
#
# From Roozbeh Pournader (2007-11-05):
# This is quoted from Official Gazette of the Islamic Republic of
# Iran, Volume 63, No. 18242, dated Tuesday 1386/6/24
# [2007-10-16]. I am doing the best translation I can:...
# The official time of the country will be moved forward for one hour
# on the 24 hours of the first day of the month of Farvardin and will
# be changed back to its previous state on the 24 hours of the
# thirtieth day of Shahrivar.
#
# From Ali Mirjamali (2022-05-10):
# Official IR News Agency announcement: irna.ir/xjJ3TT
# ...
# Highlights: DST will be cancelled for the next Iranian year 1402
# (i.e 2023-March-21) and forthcoming years.
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
# Work around a bug in zic 2022a and earlier.
Rule	Iran	1910	only	-	Jan	 1	00:00	0	-
#
Rule	Iran	1977	only	-	Mar	21	23:00	1:00	-
Rule	Iran	1977	only	-	Oct	20	24:00	0	-
Rule	Iran	1978	only	-	Mar	24	24:00	1:00	-
Rule	Iran	1978	only	-	Aug	 5	01:00	0	-
Rule	Iran	1979	only	-	May	26	24:00	1:00	-
Rule	Iran	1979	only	-	Sep	18	24:00	0	-
Rule	Iran	1980	only	-	Mar	20	24:00	1:00	-
Rule	Iran	1980	only	-	Sep	22	24:00	0	-
Rule	Iran	1991	only	-	May	 2	24:00	1:00	-
Rule	Iran	1992	1995	-	Mar	21	24:00	1:00	-
Rule	Iran	1991	1995	-	Sep	21	24:00	0	-
Rule	Iran	1996	only	-	Mar	20	24:00	1:00	-
Rule	Iran	1996	only	-	Sep	20	24:00	0	-
Rule	Iran	1997	1999	-	Mar	21	24:00	1:00	-
Rule	Iran	1997	1999	-	Sep	21	24:00	0	-
Rule	Iran	2000	only	-	Mar	20	24:00	1:00	-
Rule	Iran	2000	only	-	Sep	20	24:00	0	-
Rule	Iran	2001	2003	-	Mar	21	24:00	1:00	-
Rule	Iran	2001	2003	-	Sep	21	24:00	0	-
Rule	Iran	2004	only	-	Mar	20	24:00	1:00	-
Rule	Iran	2004	only	-	Sep	20	24:00	0	-
Rule	Iran	2005	only	-	Mar	21	24:00	1:00	-
Rule	Iran	2005	only	-	Sep	21	24:00	0	-
Rule	Iran	2008	only	-	Mar	20	24:00	1:00	-
Rule	Iran	2008	only	-	Sep	20	24:00	0	-
Rule	Iran	2009	2011	-	Mar	21	24:00	1:00	-
Rule	Iran	2009	2011	-	Sep	21	24:00	0	-
Rule	Iran	2012	only	-	Mar	20	24:00	1:00	-
Rule	Iran	2012	only	-	Sep	20	24:00	0	-
Rule	Iran	2013	2015	-	Mar	21	24:00	1:00	-
Rule	Iran	2013	2015	-	Sep	21	24:00	0	-
Rule	Iran	2016	only	-	Mar	20	24:00	1:00	-
Rule	Iran	2016	only	-	Sep	20	24:00	0	-
Rule	Iran	2017	2019	-	Mar	21	24:00	1:00	-
Rule	Iran	2017	2019	-	Sep	21	24:00	0	-
Rule	Iran	2020	only	-	Mar	20	24:00	1:00	-
Rule	Iran	2020	only	-	Sep	20	24:00	0	-
Rule	Iran	2021	2022	-	Mar	21	24:00	1:00	-
Rule	Iran	2021	2022	-	Sep	21	24:00	0	-

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Tehran	3:25:44	-	LMT	1916
			3:25:44	-	TMT	1935 Jun 13 # Tehran Mean Time
			3:30	Iran	%z	1977 Oct 20 24:00
			4:00	Iran	%z	1978 Nov 10 24:00
			3:30	Iran	%z


# Iraq
#
# From Jonathan Lennox (2000-06-12):
# An article in this week's Economist ("Inside the Saddam-free zone", p. 50 in
# the U.S. edition) on the Iraqi Kurds contains a paragraph:
# "The three northern provinces ... switched their clocks this spring and
# are an hour ahead of Baghdad."
#
# But Rives McDow (2000-06-18) quotes a contact in Iraqi-Kurdistan as follows:
# In the past, some Kurdish nationalists, as a protest to the Iraqi
# Government, did not adhere to daylight saving time.  They referred
# to daylight saving as Saddam time.  But, as of today, the time zone
# in Iraqi-Kurdistan is on standard time with Baghdad, Iraq.
#
# So we'll ignore the Economist's claim.

# From Steffen Thorsen (2008-03-10):
# The cabinet in Iraq abolished DST last week, according to the following
# news sources (in Arabic):
# http://www.aljeeran.net/wesima_articles/news-20080305-98602.html
# http://www.aswataliraq.info/look/article.tpl?id=2047&IdLanguage=17&IdPublication=4&NrArticle=71743&NrIssue=1&NrSection=10
#
# We have published a short article in English about the change:
# https://www.timeanddate.com/news/time/iraq-dumps-daylight-saving.html

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Iraq	1982	only	-	May	1	0:00	1:00	-
Rule	Iraq	1982	1984	-	Oct	1	0:00	0	-
Rule	Iraq	1983	only	-	Mar	31	0:00	1:00	-
Rule	Iraq	1984	1985	-	Apr	1	0:00	1:00	-
Rule	Iraq	1985	1990	-	Sep	lastSun	1:00s	0	-
Rule	Iraq	1986	1990	-	Mar	lastSun	1:00s	1:00	-
# IATA SSIM (1991/1996) says Apr 1 12:01am UTC; guess the ':01' is a typo.
# Shanks & Pottenger say Iraq did not observe DST 1992/1997; ignore this.
#
Rule	Iraq	1991	2007	-	Apr	 1	3:00s	1:00	-
Rule	Iraq	1991	2007	-	Oct	 1	3:00s	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Baghdad	2:57:40	-	LMT	1890
			2:57:36	-	BMT	1918     # Baghdad Mean Time?
			3:00	-	%z	1982 May
			3:00	Iraq	%z


###############################################################################

# Israel

# For more info about the motivation for DST in Israel, see:
# Barak Y. Israel's Daylight Saving Time controversy. Israel Affairs.
# 2020-08-11. https://doi.org/10.1080/13537121.2020.1806564

# From Ephraim Silverberg (2001-01-11):
#
# I coined "IST/IDT" circa 1988.  Until then there were three
# different abbreviations in use:
#
# JST  Jerusalem Standard Time [Danny Braniss, Hebrew University]
# IZT  Israel Zonal (sic) Time [Prof. Haim Papo, Technion]
# EEST Eastern Europe Standard Time [used by almost everyone else]
#
# Since timezones should be called by country and not capital cities,
# I ruled out JST.  As Israel is in Asia Minor and not Eastern Europe,
# EEST was equally unacceptable.  Since "zonal" was not compatible with
# any other timezone abbreviation, I felt that 'IST' was the way to go
# and, indeed, it has received almost universal acceptance in timezone
# settings in Israeli computers.
#
# In any case, I am happy to share timezone abbreviations with India,
# high on my favorite-country list (and not only because my wife's
# family is from India).

# From P Chan (2020-10-27), with corrections:
#
# 1940-1946 Supplement No. 2 to the Palestine Gazette
# # issue page  Order No.   dated      start        end         note
# 1 1010  729  67 of 1940 1940-05-22 1940-05-31* 1940-09-30* revoked by #2
# 2 1013  758  73 of 1940 1940-05-31 1940-05-31  1940-09-30
# 3 1055 1574 196 of 1940 1940-11-06 1940-11-16  1940-12-31
# 4 1066 1811 208 of 1940 1940-12-17 1940-12-31  1941-12-31
# 5 1156 1967 116 of 1941 1941-12-16 1941-12-31  1942-12-31* amended by #6
# 6 1228 1608  86 of 1942 1942-10-14 1941-12-31  1942-10-31
# 7 1256  279  21 of 1943 1943-03-18 1943-03-31  1943-10-31
# 8 1323  249  19 of 1944 1944-03-13 1944-03-31  1944-10-31
# 9 1402  328  20 of 1945 1945-04-05 1945-04-15  1945-10-31
#10 1487  596  14 of 1946 1946-04-04 1946-04-15  1946-10-31
#
# 1948 Iton Rishmi (Official Gazette of the Provisional Government)
# #    issue    page   dated      start       end
#11 2             7 1948-05-20 1948-05-22 1948-10-31*
#	^This moved timezone to +04, replaced by #12 from 1948-08-31 24:00 GMT.
#12 17 (Annex B) 84 1948-08-22 1948-08-31 1948-10-31
#
# 1949-2000 Kovetz HaTakanot (Collection of Regulations)
# # issue page  dated      start       end            note
#13    6  133 1949-03-23 1949-04-30  1949-10-31
#14   80  755 1950-03-17 1950-04-15  1950-09-14
#15  164  782 1951-03-22 1951-03-31  1951-09-29* amended by #16
#16  206 1940 1951-09-23 ----------  1951-10-22* amended by #17
#17  212   78 1951-10-19 ----------  1951-11-10
#18  254  652 1952-03-03 1952-04-19  1952-09-27* amended by #19
#19  300   11 1952-09-15 ----------  1952-10-18
#20  348  817 1953-03-03 1953-04-11  1953-09-12
#21  420  385 1954-02-17 1954-06-12  1954-09-11
#22  497  548 1955-01-14 1955-06-11  1955-09-10
#23  591  608 1956-03-12 1956-06-02  1956-09-29
#24  680  957 1957-02-08 1957-04-27  1957-09-21
#25 3192 1418 1974-06-28 1974-07-06  1974-10-12
#26 3322 1389 1975-04-03 1975-04-19  1975-08-30
#27 4146 2089 1980-07-15 1980-08-02  1980-09-13
#28 4604 1081 1984-02-22 1984-05-05* 1984-08-25* revoked by #29
#29 4619 1312 1984-04-06 1984-05-05  1984-08-25
#30 4744  475 1984-12-23 1985-04-13  1985-09-14* amended by #31
#31 4851 1848 1985-08-18 ----------  1985-08-31
#32 4932  899 1986-04-22 1986-05-17  1986-09-06
#33 5013  580 1987-02-15 1987-04-18* 1987-08-22* revoked by #34
#34 5021  744 1987-03-30 1987-04-14  1987-09-12
#35 5096  659 1988-02-14 1988-04-09  1988-09-03
#36 5167  514 1989-02-03 1989-04-29  1989-09-02
#37 5248  375 1990-01-23 1990-03-24  1990-08-25
#38 5335  612 1991-02-10 1991-03-09* 1991-08-31	 amended by #39
#			 1992-03-28  1992-09-05
#39 5339  709 1991-03-04 1991-03-23  ----------
#40 5506  503 1993-02-18 1993-04-02  1993-09-05
#			 1994-04-01  1994-08-28
#			 1995-03-31  1995-09-03
#41 5731  438 1996-01-01 1996-03-14  1996-09-15
#			 1997-03-13* 1997-09-18* overridden by 1997 Temp Prov
#			 1998-03-19* 1998-09-17* revoked by #42
#42 5853 1243 1997-09-18 1998-03-19  1998-09-05
#43 5937   77 1998-10-18 1999-04-02  1999-09-03
#			 2000-04-14* 2000-09-15* revoked by #44
#			 2001-04-13* 2001-09-14* revoked by #44
#44 6024   39 2000-03-14 2000-04-14  2000-10-22* overridden by 2000 Temp Prov
#			 2001-04-06* 2001-10-10* overridden by 2000 Temp Prov
#			 2002-03-29* 2002-10-29* overridden by 2000 Temp Prov
#
# These are laws enacted by the Knesset since the Minister could only alter the
# transition dates at least six months in advanced under the 1992 Law.
#				dated		start		end
# 1997 Temporary Provisions	1997-03-06	1997-03-20	1997-09-13
# 2000 Temporary Provisions	2000-07-28	----------	2000-10-06
#						2001-04-09	2001-09-24
#						2002-03-29	2002-10-07
#						2003-03-28	2003-10-03
#						2004-04-07	2004-09-22
# Note:
# Transition times in 1940-1957 (#1-#24) were midnight GMT,
# in 1974-1998 (#25-#42 and the 1997 Temporary Provisions) were midnight,
# in 1999-April 2000 (#43,#44) were 02:00,
# in the 2000 Temporary Provisions were 01:00.
#
# -----------------------------------------------------------------------------
# Links:
# 1 https://findit.library.yale.edu/images_layout/view?parentoid=15537490&increment=687
# 2 https://findit.library.yale.edu/images_layout/view?parentoid=15537490&increment=716
# 3 https://findit.library.yale.edu/images_layout/view?parentoid=15537491&increment=721
# 4 https://findit.library.yale.edu/images_layout/view?parentoid=15537491&increment=958
# 5 https://findit.library.yale.edu/images_layout/view?parentoid=15537502&increment=558
# 6 https://findit.library.yale.edu/images_layout/view?parentoid=15537511&increment=105
# 7 https://findit.library.yale.edu/images_layout/view?parentoid=15537516&increment=278
# 8 https://findit.library.yale.edu/images_layout/view?parentoid=15537522&increment=248
# 9 https://findit.library.yale.edu/images_layout/view?parentoid=15537530&increment=329
#10 https://findit.library.yale.edu/images_layout/view?parentoid=15537537&increment=601
#11 https://www.nevo.co.il/law_word/law12/er-002.pdf#page=3
#12 https://www.nevo.co.il/law_word/law12/er-017-t2.pdf#page=4
#13 https://www.nevo.co.il/law_word/law06/tak-0006.pdf#page=3
#14 https://www.nevo.co.il/law_word/law06/tak-0080.pdf#page=7
#15 https://www.nevo.co.il/law_word/law06/tak-0164.pdf#page=10
#16 https://www.nevo.co.il/law_word/law06/tak-0206.pdf#page=4
#17 https://www.nevo.co.il/law_word/law06/tak-0212.pdf#page=2
#18 https://www.nevo.co.il/law_word/law06/tak-0254.pdf#page=4
#19 https://www.nevo.co.il/law_word/law06/tak-0300.pdf#page=5
#20 https://www.nevo.co.il/law_word/law06/tak-0348.pdf#page=3
#21 https://www.nevo.co.il/law_word/law06/tak-0420.pdf#page=5
#22 https://www.nevo.co.il/law_word/law06/tak-0497.pdf#page=10
#23 https://www.nevo.co.il/law_word/law06/tak-0591.pdf#page=6
#24 https://www.nevo.co.il/law_word/law06/tak-0680.pdf#page=3
#25 https://www.nevo.co.il/law_word/law06/tak-3192.pdf#page=2
#26 https://www.nevo.co.il/law_word/law06/tak-3322.pdf#page=5
#27 https://www.nevo.co.il/law_word/law06/tak-4146.pdf#page=2
#28 https://www.nevo.co.il/law_word/law06/tak-4604.pdf#page=7
#29 https://www.nevo.co.il/law_word/law06/tak-4619.pdf#page=2
#30 https://www.nevo.co.il/law_word/law06/tak-4744.pdf#page=11
#31 https://www.nevo.co.il/law_word/law06/tak-4851.pdf#page=2
#32 https://www.nevo.co.il/law_word/law06/tak-4932.pdf#page=19
#33 https://www.nevo.co.il/law_word/law06/tak-5013.pdf#page=8
#34 https://www.nevo.co.il/law_word/law06/tak-5021.pdf#page=8
#35 https://www.nevo.co.il/law_word/law06/tak-5096.pdf#page=3
#36 https://www.nevo.co.il/law_word/law06/tak-5167.pdf#page=2
#37 https://www.nevo.co.il/law_word/law06/tak-5248.pdf#page=7
#38 https://www.nevo.co.il/law_word/law06/tak-5335.pdf#page=6
#39 https://www.nevo.co.il/law_word/law06/tak-5339.pdf#page=7
#40 https://www.nevo.co.il/law_word/law06/tak-5506.pdf#page=19
#41 https://www.nevo.co.il/law_word/law06/tak-5731.pdf#page=2
#42 https://www.nevo.co.il/law_word/law06/tak-5853.pdf#page=3
#43 https://www.nevo.co.il/law_word/law06/tak-5937.pdf#page=9
#44 https://www.nevo.co.il/law_word/law06/tak-6024.pdf#page=4
#
# Time Determination (Temporary Provisions) Law, 1997
# https://www.nevo.co.il/law_html/law19/p201_003.htm
#
# Time Determination (Temporary Provisions) Law, 2000
# https://www.nevo.co.il/law_html/law19/p201_004.htm
#
# Time Determination Law, 1992 and amendments
# https://www.nevo.co.il/law_html/law01/p201_002.htm
# https://main.knesset.gov.il/Activity/Legislation/Laws/Pages/LawPrimary.aspx?lawitemid=2001174

# From Paul Eggert (2020-10-27):
# Several of the midnight transitions mentioned above are ambiguous;
# are they 00:00, 00:00s, 24:00, or 24:00s?  When resolving these ambiguities,
# try to minimize changes from previous tzdb versions, for lack of better info.
# Commentary from previous versions is included below, to help explain this.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Zion	1940	only	-	May	31	24:00u	1:00	D
Rule	Zion	1940	only	-	Sep	30	24:00u	0	S
Rule	Zion	1940	only	-	Nov	16	24:00u	1:00	D
Rule	Zion	1942	1946	-	Oct	31	24:00u	0	S
Rule	Zion	1943	1944	-	Mar	31	24:00u	1:00	D
Rule	Zion	1945	1946	-	Apr	15	24:00u	1:00	D
Rule	Zion	1948	only	-	May	22	24:00u	2:00	DD
Rule	Zion	1948	only	-	Aug	31	24:00u	1:00	D
Rule	Zion	1948	1949	-	Oct	31	24:00u	0	S
Rule	Zion	1949	only	-	Apr	30	24:00u	1:00	D
Rule	Zion	1950	only	-	Apr	15	24:00u	1:00	D
Rule	Zion	1950	only	-	Sep	14	24:00u	0	S
Rule	Zion	1951	only	-	Mar	31	24:00u	1:00	D
Rule	Zion	1951	only	-	Nov	10	24:00u	0	S
Rule	Zion	1952	only	-	Apr	19	24:00u	1:00	D
Rule	Zion	1952	only	-	Oct	18	24:00u	0	S
Rule	Zion	1953	only	-	Apr	11	24:00u	1:00	D
Rule	Zion	1953	only	-	Sep	12	24:00u	0	S
Rule	Zion	1954	only	-	Jun	12	24:00u	1:00	D
Rule	Zion	1954	only	-	Sep	11	24:00u	0	S
Rule	Zion	1955	only	-	Jun	11	24:00u	1:00	D
Rule	Zion	1955	only	-	Sep	10	24:00u	0	S
Rule	Zion	1956	only	-	Jun	 2	24:00u	1:00	D
Rule	Zion	1956	only	-	Sep	29	24:00u	0	S
Rule	Zion	1957	only	-	Apr	27	24:00u	1:00	D
Rule	Zion	1957	only	-	Sep	21	24:00u	0	S
Rule	Zion	1974	only	-	Jul	 6	24:00	1:00	D
Rule	Zion	1974	only	-	Oct	12	24:00	0	S
Rule	Zion	1975	only	-	Apr	19	24:00	1:00	D
Rule	Zion	1975	only	-	Aug	30	24:00	0	S

# From Alois Treindl (2019-03-06):
# http://www.moin.gov.il/Documents/שעון%20קיץ/clock-50-years-7-2014.pdf
# From Isaac Starkman (2019-03-06):
# Summer time was in that period in 1980 and 1984, see
# https://www.ynet.co.il/articles/0,7340,L-3951073,00.html
# You can of course read it in translation.
# I checked the local newspapers for that years.
# It started on midnight and end at 01.00 am.
# From Paul Eggert (2019-03-06):
# Also see this thread about the moin.gov.il URL:
# https://mm.icann.org/pipermail/tz/2018-November/027194.html
Rule	Zion	1980	only	-	Aug	 2	24:00s	1:00	D
Rule	Zion	1980	only	-	Sep	13	24:00s	0	S
Rule	Zion	1984	only	-	May	 5	24:00s	1:00	D
Rule	Zion	1984	only	-	Aug	25	24:00s	0	S

Rule	Zion	1985	only	-	Apr	13	24:00	1:00	D
Rule	Zion	1985	only	-	Aug	31	24:00	0	S
Rule	Zion	1986	only	-	May	17	24:00	1:00	D
Rule	Zion	1986	only	-	Sep	 6	24:00	0	S
Rule	Zion	1987	only	-	Apr	14	24:00	1:00	D
Rule	Zion	1987	only	-	Sep	12	24:00	0	S

# From Avigdor Finkelstein (2014-03-05):
# I check the Parliament (Knesset) records and there it's stated that the
# [1988] transition should take place on Saturday night, when the Sabbath
# ends and changes to Sunday.
Rule	Zion	1988	only	-	Apr	 9	24:00	1:00	D
Rule	Zion	1988	only	-	Sep	 3	24:00	0	S

# From Ephraim Silverberg
# (1997-03-04, 1998-03-16, 1998-12-28, 2000-01-17, 2000-07-25, 2004-12-22,
# and 2005-02-17):

# According to the Office of the Secretary General of the Ministry of
# Interior, there is NO set rule for Daylight-Savings/Standard time changes.
# One thing is entrenched in law, however: that there must be at least 150
# days of daylight savings time annually.  From 1993-1998, the change to
# daylight savings time was on a Friday morning from midnight IST to
# 1 a.m IDT; up until 1998, the change back to standard time was on a
# Saturday night from midnight daylight savings time to 11 p.m. standard
# time.  1996 is an exception to this rule where the change back to standard
# time took place on Sunday night instead of Saturday night to avoid
# conflicts with the Jewish New Year.  In 1999, the change to
# daylight savings time was still on a Friday morning but from
# 2 a.m. IST to 3 a.m. IDT; furthermore, the change back to standard time
# was also on a Friday morning from 2 a.m. IDT to 1 a.m. IST for
# 1999 only.  In the year 2000, the change to daylight savings time was
# similar to 1999, but although the change back will be on a Friday, it
# will take place from 1 a.m. IDT to midnight IST.  Starting in 2001, all
# changes to/from will take place at 1 a.m. old time, but now there is no
# rule as to what day of the week it will take place in as the start date
# (except in 2003) is the night after the Passover Seder (i.e. the eve
# of the 16th of Nisan in the lunar Hebrew calendar) and the end date
# (except in 2002) is three nights before Yom Kippur [Day of Atonement]
# (the eve of the 7th of Tishrei in the lunar Hebrew calendar).

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Zion	1989	only	-	Apr	29	24:00	1:00	D
Rule	Zion	1989	only	-	Sep	 2	24:00	0	S
Rule	Zion	1990	only	-	Mar	24	24:00	1:00	D
Rule	Zion	1990	only	-	Aug	25	24:00	0	S
Rule	Zion	1991	only	-	Mar	23	24:00	1:00	D
Rule	Zion	1991	only	-	Aug	31	24:00	0	S
Rule	Zion	1992	only	-	Mar	28	24:00	1:00	D
Rule	Zion	1992	only	-	Sep	 5	24:00	0	S
Rule	Zion	1993	only	-	Apr	 2	0:00	1:00	D
Rule	Zion	1993	only	-	Sep	 5	0:00	0	S

# The dates for 1994-1995 were obtained from Office of the Spokeswoman for the
# Ministry of Interior, Jerusalem, Israel.  The spokeswoman can be reached by
# calling the office directly at 972-2-6701447 or 972-2-6701448.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Zion	1994	only	-	Apr	 1	0:00	1:00	D
Rule	Zion	1994	only	-	Aug	28	0:00	0	S
Rule	Zion	1995	only	-	Mar	31	0:00	1:00	D
Rule	Zion	1995	only	-	Sep	 3	0:00	0	S

# The dates for 1996 were determined by the Minister of Interior of the
# time, Haim Ramon.  The official announcement regarding 1996-1998
# (with the dates for 1997-1998 no longer being relevant) can be viewed at:
#
#   ftp://ftp.cs.huji.ac.il/pub/tz/announcements/1996-1998.ramon.ps.gz
#
# The dates for 1997-1998 were altered by his successor, Rabbi Eli Suissa.
#
# The official announcements for the years 1997-1999 can be viewed at:
#
#   ftp://ftp.cs.huji.ac.il/pub/tz/announcements/YYYY.ps.gz
#
#       where YYYY is the relevant year.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Zion	1996	only	-	Mar	14	24:00	1:00	D
Rule	Zion	1996	only	-	Sep	15	24:00	0	S
Rule	Zion	1997	only	-	Mar	20	24:00	1:00	D
Rule	Zion	1997	only	-	Sep	13	24:00	0	S
Rule	Zion	1998	only	-	Mar	20	0:00	1:00	D
Rule	Zion	1998	only	-	Sep	 6	0:00	0	S
Rule	Zion	1999	only	-	Apr	 2	2:00	1:00	D
Rule	Zion	1999	only	-	Sep	 3	2:00	0	S

# The Knesset Interior Committee has changed the dates for 2000 for
# the third time in just over a year and have set new dates for the
# years 2001-2004 as well.
#
# The official announcement for the start date of 2000 can be viewed at:
#
#	ftp://ftp.cs.huji.ac.il/pub/tz/announcements/2000-start.ps.gz
#
# The official announcement for the end date of 2000 and the dates
# for the years 2001-2004 can be viewed at:
#
#	ftp://ftp.cs.huji.ac.il/pub/tz/announcements/2000-2004.ps.gz

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Zion	2000	only	-	Apr	14	2:00	1:00	D
Rule	Zion	2000	only	-	Oct	 6	1:00	0	S
Rule	Zion	2001	only	-	Apr	 9	1:00	1:00	D
Rule	Zion	2001	only	-	Sep	24	1:00	0	S
Rule	Zion	2002	only	-	Mar	29	1:00	1:00	D
Rule	Zion	2002	only	-	Oct	 7	1:00	0	S
Rule	Zion	2003	only	-	Mar	28	1:00	1:00	D
Rule	Zion	2003	only	-	Oct	 3	1:00	0	S
Rule	Zion	2004	only	-	Apr	 7	1:00	1:00	D
Rule	Zion	2004	only	-	Sep	22	1:00	0	S

# The proposed law agreed upon by the Knesset Interior Committee on
# 2005-02-14 is that, for 2005 and beyond, DST starts at 02:00 the
# last Friday before April 2nd (i.e. the last Friday in March or April
# 1st itself if it falls on a Friday) and ends at 02:00 on the Saturday
# night _before_ the fast of Yom Kippur.
#
# Those who can read Hebrew can view the announcement at:
#
#	ftp://ftp.cs.huji.ac.il/pub/tz/announcements/2005+beyond.ps

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Zion	2005	2012	-	Apr	Fri<=1	2:00	1:00	D
Rule	Zion	2005	only	-	Oct	 9	2:00	0	S
Rule	Zion	2006	only	-	Oct	 1	2:00	0	S
Rule	Zion	2007	only	-	Sep	16	2:00	0	S
Rule	Zion	2008	only	-	Oct	 5	2:00	0	S
Rule	Zion	2009	only	-	Sep	27	2:00	0	S
Rule	Zion	2010	only	-	Sep	12	2:00	0	S
Rule	Zion	2011	only	-	Oct	 2	2:00	0	S
Rule	Zion	2012	only	-	Sep	23	2:00	0	S

# From Ephraim Silverberg (2020-10-26):
# The current time law (2013) from the State of Israel can be viewed
# (in Hebrew) at:
# ftp://ftp.cs.huji.ac.il/pub/tz/israel/announcements/2013+law.pdf
# It translates to:
# Every year, in the period from the Friday before the last Sunday in
# the month of March at 02:00 a.m. until the last Sunday of the month
# of October at 02:00 a.m., Israel Time will be advanced an additional
# hour such that it will be UTC+3.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Zion	2013	max	-	Mar	Fri>=23	2:00	1:00	D
Rule	Zion	2013	max	-	Oct	lastSun	2:00	0	S

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Jerusalem	2:20:54 -	LMT	1880
			2:20:40	-	JMT	1918 # Jerusalem Mean Time?
			2:00	Zion	I%sT



###############################################################################

# Japan

# '9:00' and 'JST' is from Guy Harris.

# From Paul Eggert (2020-01-19):
# Starting in the 7th century, Japan generally followed an ancient Chinese
# timekeeping system that divided night and day into six hours each,
# with hour length depending on season.  In 1873 the government
# started requiring the use of a Western style 24-hour clock.  See:
# Yulia Frumer, "Making Time: Astronomical Time Measurement in Tokugawa Japan"
# <https://www.worldcat.org/oclc/1043907065>.  As the tzdb code and
# data support only 24-hour clocks, its tables model timestamps before
# 1873 using Western-style local mean time.

# From Hideyuki Suzuki (1998-11-09):
# 'Tokyo' usually stands for the former location of Tokyo Astronomical
# Observatory: 139° 44' 40.90" E (9h 18m 58.727s), 35° 39' 16.0" N.
# This data is from 'Rika Nenpyou (Chronological Scientific Tables) 1996'
# edited by National Astronomical Observatory of Japan....
# JST (Japan Standard Time) has been used since 1888-01-01 00:00 (JST).
# The law is enacted on 1886-07-07.

# From Hideyuki Suzuki (1998-11-16):
# The ordinance No. 51 (1886) established "standard time" in Japan,
# which stands for the time on 135° E.
# In the ordinance No. 167 (1895), "standard time" was renamed to "central
# standard time".  And the same ordinance also established "western standard
# time", which stands for the time on 120° E....  But "western standard
# time" was abolished in the ordinance No. 529 (1937).  In the ordinance No.
# 167, there is no mention regarding for what place western standard time is
# standard....
#
# I wrote "ordinance" above, but I don't know how to translate.
# In Japanese it's "chokurei", which means ordinance from emperor.

# From Yu-Cheng Chuang (2013-07-12):
# ...the Meiji Emperor announced Ordinance No. 167 of Meiji Year 28 "The clause
# about standard time" ... The adoption began from Jan 1, 1896.
# https://ja.wikisource.org/wiki/標準時ニ關スル件_(公布時)
#
# ...the Showa Emperor announced Ordinance No. 529 of Showa Year 12 ... which
# means the whole Japan territory, including later occupations, adopt Japan
# Central Time (UT+9). The adoption began on Oct 1, 1937.
# https://ja.wikisource.org/wiki/明治二十八年勅令第百六十七號標準時ニ關スル件中改正ノ件

# From Paul Eggert (1995-03-06):
# Today's _Asahi Evening News_ (page 4) reports that Japan had
# daylight saving between 1948 and 1951, but "the system was discontinued
# because the public believed it would lead to longer working hours."

# From Mayumi Negishi in the 2005-08-10 Japan Times:
# http://www.japantimes.co.jp/cgi-bin/getarticle.pl5?nn20050810f2.htm
# Occupation authorities imposed daylight-saving time on Japan on
# [1948-05-01]....  But lack of prior debate and the execution of
# daylight-saving time just three days after the bill was passed generated
# deep hatred of the concept....  The Diet unceremoniously passed a bill to
# dump the unpopular system in October 1951, less than a month after the San
# Francisco Peace Treaty was signed.  (A government poll in 1951 showed 53%
# of the Japanese wanted to scrap daylight-saving time, as opposed to 30% who
# wanted to keep it.)

# From Takayuki Nikai (2018-01-19):
# The source of information is Japanese law.
# http://www.shugiin.go.jp/internet/itdb_housei.nsf/html/houritsu/00219480428029.htm
# http://www.shugiin.go.jp/internet/itdb_housei.nsf/html/houritsu/00719500331039.htm
# ... In summary, it is written as follows.  From 24:00 on the first Saturday
# in May, until 0:00 on the day after the second Saturday in September.

# From Phake Nick (2018-09-27):
# [T]he webpage authored by National Astronomical Observatory of Japan
# https://eco.mtk.nao.ac.jp/koyomi/wiki/BBFEB9EF2FB2C6BBFEB9EF.html
# ... mentioned that using Showa 23 (year 1948) as example, 13pm of September
# 11 in summer time will equal to 0am of September 12 in standard time.
# It cited a document issued by the Liaison Office which briefly existed
# during the postwar period of Japan, where the detail on implementation
# of the summer time is described in the document.
# https://eco.mtk.nao.ac.jp/koyomi/wiki/BBFEB9EF2FB2C6BBFEB9EFB2C6BBFEB9EFA4CEBCC2BBDCA4CBA4C4A4A4A4C6.pdf
# The text in the document do instruct a fall back to occur at
# September 11, 13pm in summer time, while ordinary citizens can
# change the clock before they sleep.
#
# From Paul Eggert (2018-09-27):
# This instruction is equivalent to "Sat>=8 25:00", so use that.  zic treats
# it like "Sun>=9 01:00", which is not quite the same but is the best we can
# do in any POSIX or C platform.  The "25:00" assumes zic from 2007 or later,
# which should be safe now.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Japan	1948	only	-	May	Sat>=1	24:00	1:00	D
Rule	Japan	1948	1951	-	Sep	Sat>=8	25:00	0	S
Rule	Japan	1949	only	-	Apr	Sat>=1	24:00	1:00	D
Rule	Japan	1950	1951	-	May	Sat>=1	24:00	1:00	D

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Tokyo	9:18:59	-	LMT	1887 Dec 31 15:00u
			9:00	Japan	J%sT
# Since 1938, all Japanese possessions have been like Asia/Tokyo,
# except that Truk (Chuuk), Ponape (Pohnpei), and Jaluit (Kosrae) did not
# switch from +10 to +09 until 1941-04-01; see the 'australasia' file.

# Jordan
#
# From <http://star.arabia.com/990701/JO9.html>
# Jordan Week (1999-07-01) via Steffen Thorsen (1999-09-09):
# Clocks in Jordan were forwarded one hour on Wednesday at midnight,
# in accordance with the government's decision to implement summer time
# all year round.
#
# From <http://star.arabia.com/990930/JO9.html>
# Jordan Week (1999-09-30) via Steffen Thorsen (1999-11-09):
# Winter time starts today Thursday, 30 September. Clocks will be turned back
# by one hour.  This is the latest government decision and it's final!
# The decision was taken because of the increase in working hours in
# government's departments from six to seven hours.
#
# From Paul Eggert (2005-11-22):
# Starting 2003 transitions are from Steffen Thorsen's web site timeanddate.com.
#
# From Steffen Thorsen (2005-11-23):
# For Jordan I have received multiple independent user reports every year
# about DST end dates, as the end-rule is different every year.
#
# From Steffen Thorsen (2006-10-01), after a heads-up from Hilal Malawi:
# http://www.petranews.gov.jo/nepras/2006/Sep/05/4000.htm
# "Jordan will switch to winter time on Friday, October 27".
#

# From Steffen Thorsen (2009-04-02):
# This single one might be good enough, (2009-03-24, Arabic):
# http://petra.gov.jo/Artical.aspx?Lng=2&Section=8&Artical=95279
#
# Google's translation:
#
# > The Council of Ministers decided in 2002 to adopt the principle of timely
# > submission of the summer at 60 minutes as of midnight on the last Thursday
# > of the month of March of each year.
#
# So - this means the midnight between Thursday and Friday since 2002.

# From Arthur David Olson (2009-04-06):
# We still have Jordan switching to DST on Thursdays in 2000 and 2001.

# From Steffen Thorsen (2012-10-25):
# Yesterday the government in Jordan announced that they will not
# switch back to standard time this winter, so the will stay on DST
# until about the same time next year (at least).
# http://www.petra.gov.jo/Public_News/Nws_NewsDetails.aspx?NewsID=88950

# From Steffen Thorsen (2013-12-11):
# Jordan Times and other sources say that Jordan is going back to
# UTC+2 on 2013-12-19 at midnight:
# http://jordantimes.com/govt-decides-to-switch-back-to-wintertime
# Official, in Arabic:
# http://www.petra.gov.jo/public_news/Nws_NewsDetails.aspx?Menu_ID=&Site_Id=2&lang=1&NewsID=133230&CatID=14
# ... Our background/permalink about it
# https://www.timeanddate.com/news/time/jordan-reverses-dst-decision.html
# ...
# http://www.petra.gov.jo/Public_News/Nws_NewsDetails.aspx?lang=2&site_id=1&NewsID=133313&Type=P
# ... says midnight for the coming one and 1:00 for the ones in the future
# (and they will use DST again next year, using the normal schedule).

# From Paul Eggert (2013-12-11):
# As Steffen suggested, consider the past 21-month experiment to be DST.

# From Steffen Thorsen (2021-09-24):
# The Jordanian Government announced yesterday that they will start DST
# in February instead of March:
# https://petra.gov.jo/Include/InnerPage.jsp?ID=37683&lang=en&name=en_news (English)
# https://petra.gov.jo/Include/InnerPage.jsp?ID=189969&lang=ar&name=news (Arabic)
# From the Arabic version, it seems to say it would be at midnight
# (assume 24:00) on the last Thursday in February, starting from 2022.

# From Issam Al-Zuwairi (2022-10-05):
# The Council of Ministers in Jordan decided Wednesday 5th October 2022,
# that daylight saving time (DST) will be throughout the year....
#
# From Brian Inglis (2022-10-06):
# https://petra.gov.jo/Include/InnerPage.jsp?ID=45567&lang=en&name=en_news
#
# From Paul Eggert (2022-10-05):
# Like Syria, model this as a transition from EEST +03 (DST) to plain +03
# (non-DST) at the point where DST would otherwise have ended.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Jordan	1973	only	-	Jun	6	0:00	1:00	S
Rule	Jordan	1973	1975	-	Oct	1	0:00	0	-
Rule	Jordan	1974	1977	-	May	1	0:00	1:00	S
Rule	Jordan	1976	only	-	Nov	1	0:00	0	-
Rule	Jordan	1977	only	-	Oct	1	0:00	0	-
Rule	Jordan	1978	only	-	Apr	30	0:00	1:00	S
Rule	Jordan	1978	only	-	Sep	30	0:00	0	-
Rule	Jordan	1985	only	-	Apr	1	0:00	1:00	S
Rule	Jordan	1985	only	-	Oct	1	0:00	0	-
Rule	Jordan	1986	1988	-	Apr	Fri>=1	0:00	1:00	S
Rule	Jordan	1986	1990	-	Oct	Fri>=1	0:00	0	-
Rule	Jordan	1989	only	-	May	8	0:00	1:00	S
Rule	Jordan	1990	only	-	Apr	27	0:00	1:00	S
Rule	Jordan	1991	only	-	Apr	17	0:00	1:00	S
Rule	Jordan	1991	only	-	Sep	27	0:00	0	-
Rule	Jordan	1992	only	-	Apr	10	0:00	1:00	S
Rule	Jordan	1992	1993	-	Oct	Fri>=1	0:00	0	-
Rule	Jordan	1993	1998	-	Apr	Fri>=1	0:00	1:00	S
Rule	Jordan	1994	only	-	Sep	Fri>=15	0:00	0	-
Rule	Jordan	1995	1998	-	Sep	Fri>=15	0:00s	0	-
Rule	Jordan	1999	only	-	Jul	 1	0:00s	1:00	S
Rule	Jordan	1999	2002	-	Sep	lastFri	0:00s	0	-
Rule	Jordan	2000	2001	-	Mar	lastThu	0:00s	1:00	S
Rule	Jordan	2002	2012	-	Mar	lastThu	24:00	1:00	S
Rule	Jordan	2003	only	-	Oct	24	0:00s	0	-
Rule	Jordan	2004	only	-	Oct	15	0:00s	0	-
Rule	Jordan	2005	only	-	Sep	lastFri	0:00s	0	-
Rule	Jordan	2006	2011	-	Oct	lastFri	0:00s	0	-
Rule	Jordan	2013	only	-	Dec	20	0:00	0	-
Rule	Jordan	2014	2021	-	Mar	lastThu	24:00	1:00	S
Rule	Jordan	2014	2022	-	Oct	lastFri	0:00s	0	-
Rule	Jordan	2022	only	-	Feb	lastThu	24:00	1:00	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Amman	2:23:44 -	LMT	1931
			2:00	Jordan	EE%sT	2022 Oct 28 0:00s
			3:00	-	%z


# Kazakhstan

# From Kazakhstan Embassy's News Bulletin No. 11
# <http://www.kazsociety.org.uk/news/2005/03/30.htm> (2005-03-21):
# The Government of Kazakhstan passed a resolution March 15 abolishing
# daylight saving time citing lack of economic benefits and health
# complications coupled with a decrease in productivity.
#
# From Branislav Kojic (in Astana) via Gwillim Law (2005-06-28):
# ... what happened was that the former Kazakhstan Eastern time zone
# was "blended" with the Central zone.  Therefore, Kazakhstan now has
# two time zones, and difference between them is one hour.  The zone
# closer to UTC is the former Western zone (probably still called the
# same), encompassing four provinces in the west: Aqtöbe, Atyraū,
# Mangghystaū, and West Kazakhstan.  The other zone encompasses
# everything else....  I guess that would make Kazakhstan time zones
# de jure UTC+5 and UTC+6 respectively.

# From Stepan Golosunov (2016-03-27):
# Review of the linked documents from http://adilet.zan.kz/
# produced the following data for post-1991 Kazakhstan:
#
# 0. Act of the Cabinet of Ministers of the USSR
# from 1991-02-04 No. 20
# http://pravo.gov.ru/proxy/ips/?docbody=&nd=102010545
# removed the extra hour ("decree time") on the territory of the USSR
# starting with the last Sunday of March 1991.
# It also allowed (but not mandated) Kazakh SSR, Kirghiz SSR, Tajik SSR,
# Turkmen SSR and Uzbek SSR to not have "summer" time.
#
# The 1992-01-13 act also refers to the act of the Cabinet of Ministers
# of the Kazakh SSR from 1991-03-20 No. 170 "About the act of the Cabinet
# of Ministers of the USSR from 1991-02-04 No. 20" but I didn't found its
# text.
#
# According to Izvestia newspaper No. 68 (23334) from 1991-03-20
# -- page 6; available at http://libinfo.org/newsr/newsr2574.djvu via
# http://libinfo.org/index.php?id=58564 -- on 1991-03-31 at 2:00 during
# transition to "summer" time:
# Republic of Georgia, Latvian SSR, Lithuanian SSR, SSR Moldova,
# Estonian SSR; Komi ASSR; Kaliningrad oblast; Nenets autonomous okrug
# were to move clocks 1 hour forward.
# Kazakh SSR (excluding Uralsk oblast); Republic of Kyrgyzstan, Tajik
# SSR; Andijan, Jizzakh, Namangan, Sirdarya, Tashkent, Fergana oblasts
# of the Uzbek SSR were to move clocks 1 hour backwards.
# Other territories were to not move clocks.
# When the "summer" time would end on 1991-09-29, clocks were to be
# moved 1 hour backwards on the territory of the USSR excluding
# Kazakhstan, Kirghizia, Uzbekistan, Turkmenia, Tajikistan.
#
# Apparently there were last minute changes. Apparently Kazakh act No. 170
# was one of such changes.
#
# https://ru.wikipedia.org/wiki/Декретное_время
# claims that Sovetskaya Rossiya newspaper on 1991-03-29 published that
# Nenets autonomous okrug, Komi and Kazakhstan (excluding Uralsk oblast)
# were to not move clocks and Uralsk oblast was to move clocks
# forward; on 1991-09-29 Kazakhstan was to move clocks backwards.
# (Probably there were changes even after that publication. There is an
# article claiming that Kaliningrad oblast decided on 1991-03-29 to not
# move clocks.)
#
# This implies that on 1991-03-31 Asia/Oral remained on +04/+05 while
# the rest of Kazakhstan switched from +06/+07 to +05/06 or from +05/06
# to +04/+05. It's unclear how Qyzylorda oblast moved into the fifth
# time belt. (By switching from +04/+05 to +05/+06 on 1991-09-29?) ...
#
# 1. Act of the Cabinet of Ministers of the Republic of Kazakhstan
# from 1992-01-13 No. 28
# http://adilet.zan.kz/rus/docs/P920000028_
# (text includes modification from the 1996 act)
# introduced new rules for calculation of time, mirroring Russian
# 1992-01-08 act.  It specified that time would be calculated
# according to time belts plus extra hour ("decree time"), moved clocks
# on the whole territory of Kazakhstan 1 hour forward on 1992-01-19 at
# 2:00, specified DST rules.  It acknowledged that Kazakhstan was
# located in the fourth and the fifth time belts and specified the
# border between them to be located east of Qostanay and Aktyubinsk
# oblasts (notably including Turgai and Qyzylorda oblasts into the fifth
# time belt).
#
# This means switch on 1992-01-19 at 2:00 from +04/+05 to +05/+06 for
# Asia/Aqtau, Asia/Aqtobe, Asia/Oral, Atyraū and Qostanay oblasts; from
# +05/+06 to +06/+07 for Asia/Almaty and Asia/Qyzylorda (and Arkalyk)....
#
# 2. Act of the Cabinet of Ministers of the Republic of Kazakhstan
# from 1992-03-27 No. 284
# http://adilet.zan.kz/rus/docs/P920000284_
# cancels extra hour ("decree time") for Uralsk and Qyzylorda oblasts
# since the last Sunday of March 1992, while keeping them in the fourth
# and the fifth time belts respectively.
#
# 3. Order of the Prime Minister of the Republic of Kazakhstan
# from 1994-09-23 No. 384
# http://adilet.zan.kz/rus/docs/R940000384_
# cancels the extra hour ("decree time") on the territory of Mangghystaū
# oblast since the last Sunday of September 1994 (saying that time on
# the territory would correspond to the third time belt as a
# result)....
#
# 4. Act of the Government of the Republic of Kazakhstan
# from 1996-05-08 No. 575
# http://adilet.zan.kz/rus/docs/P960000575_
# amends the 1992-01-13 act to end summer time in October instead
# of September, mirroring identical Russian change from 1996-04-23 act.
#
# 5. Act of the Government of the Republic of Kazakhstan
# from 1999-03-26 No. 305
# http://adilet.zan.kz/rus/docs/P990000305_
# cancels the extra hour ("decree time") for Atyraū oblast since the
# last Sunday of March 1999 while retaining the oblast in the fourth
# time belt.
#
# This means change from +05/+06 to +04/+05....
#
# 6. Act of the Government of the Republic of Kazakhstan
# from 2000-11-23 No. 1749
# http://adilet.zan.kz/rus/archive/docs/P000001749_/23.11.2000
# replaces the previous five documents.
#
# The only changes I noticed are in definition of the border between the
# fourth and the fifth time belts.  They account for changes in spelling
# and administrative division (splitting of Turgai oblast in 1997
# probably changed time in territories incorporated into Qostanay oblast
# (including Arkalyk) from +06/+07 to +05/+06) and move Qyzylorda oblast
# from being in the fifth time belt and not using decree time into the
# fourth time belt (no change in practice).
#
# 7. Act of the Government of the Republic of Kazakhstan
# from 2003-12-29 No. 1342
# http://adilet.zan.kz/rus/docs/P030001342_
# modified the 2000-11-23 act.  No relevant changes, apparently.
#
# 8. Act of the Government of the Republic of Kazakhstan
# from 2004-07-20 No. 775
# http://adilet.zan.kz/rus/archive/docs/P040000775_/20.07.2004
# modified the 2000-11-23 act to move Qostanay and Qyzylorda oblasts into
# the fifth time belt and add Aktobe oblast to the list of regions not
# using extra hour ("decree time"), leaving Kazakhstan with only 2 time
# zones (+04/+05 and +06/+07).  The changes were to be implemented
# during DST transitions in 2004 and 2005 but the acts got radically
# amended before implementation happened.
#
# 9. Act of the Government of the Republic of Kazakhstan
# from 2004-09-15 No. 1059
# http://adilet.zan.kz/rus/docs/P040001059_
# modified the 2000-11-23 act to remove exceptions from the "decree time"
# (leaving Kazakhstan in +05/+06 and +06/+07 zones), amended the
# 2004-07-20 act to implement changes for Atyraū, West Kazakhstan,
# Qostanay, Qyzylorda and Mangghystaū oblasts by not moving clocks
# during the 2004 transition to "winter" time.
#
# This means transition from +04/+05 to +05/+06 for Atyraū oblast (no
# zone currently), Asia/Oral, Asia/Aqtau and transition from +05/+06 to
# +06/+07 for Qostanay oblast (Qostanay and Arkalyk, no zones currently)
# and Asia/Qyzylorda on 2004-10-31 at 3:00....
#
# 10. Act of the Government of the Republic of Kazakhstan
# from 2005-03-15 No. 231
# http://adilet.zan.kz/rus/docs/P050000231_
# removes DST provisions from the 2000-11-23 act, removes most of the
# (already implemented) provisions from the 2004-07-20 and 2004-09-15
# acts, comes into effect 10 days after official publication.
# The only practical effect seems to be the abolition of the summer
# time.
#
# Unamended version of the act of the Government of the Russian Federation
# No. 23 from 1992-01-08 [See 'europe' file for details].
# Kazakh 1992-01-13 act appears to provide the same rules and 1992-03-27
# act was to be enacted on the last Sunday of March 1992.

# From Stepan Golosunov (2016-11-08):
# Turgai reorganization should affect only southern part of Qostanay
# oblast.  Which should probably be separated into Asia/Arkalyk zone.
# (There were also 1970, 1988 and 1990 Turgai oblast reorganizations
# according to wikipedia.)
#
# [For Qostanay] http://www.ng.kz/gazeta/195/hranit/
# suggests that clocks were to be moved 40 minutes backwards on
# 1920-01-01 to the fourth time belt.  But I do not understand
# how that could happen....
#
# [For Atyrau and Oral] 1919 decree
# (http://www.worldtimezone.com/dst_news/dst_news_russia-1919-02-08.html
# and in Byalokoz) lists Ural river (plus 10 versts on its left bank) in
# the third time belt (before 1930 this means +03).

# From Alexander Konzurovski (2018-12-20):
# (Asia/Qyzylorda) is changing its time zone from UTC+6 to UTC+5
# effective December 21st, 2018....
# http://adilet.zan.kz/rus/docs/P1800000817 (russian language).

# From Zhanbolat Raimbekov (2024-01-19):
# Kazakhstan (all parts) switching to UTC+5 on March 1, 2024
# https://www.gov.kz/memleket/entities/mti/press/news/details/688998?lang=ru
# [in Russian]
# (2024-01-20): https://primeminister.kz/ru/decisions/19012024-20
#
# From Alexander Krivenyshev (2024-01-19):
# According to a different news and the official web site for the Ministry of
# Trade and Integration of the Republic of Kazakhstan:
# https://en.inform.kz/news/kazakhstan-to-switch-to-single-hour-zone-mar-1-54ad0b/

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
#
# Almaty (formerly Alma-Ata), representing most locations in Kazakhstan
# This includes Abai/Abay (ISO 3166-2 code KZ-10), Aqmola/Akmola (KZ-11),
# Almaty (KZ-19), Almaty city (KZ-75), Astana city (KZ-71),
# East Kazakhstan (KZ-63), Jambyl/Zhambyl (KZ-31), Jetisu/Zhetysu (KZ-33),
# Karaganda (KZ-35), North Kazakhstan (KZ-59), Pavlodar (KZ-55),
# Shymkent city (KZ-79), Turkistan (KZ-61), and Ulytau (KZ-62).
Zone	Asia/Almaty	5:07:48 -	LMT	1924 May  2 # or Alma-Ata
			5:00	-	%z	1930 Jun 21
			6:00 RussiaAsia %z	1991 Mar 31  2:00s
			5:00 RussiaAsia	%z	1992 Jan 19  2:00s
			6:00 RussiaAsia	%z	2004 Oct 31  2:00s
			6:00	-	%z	2024 Mar  1  0:00
			5:00	-	%z
# Qyzylorda (aka Kyzylorda, Kizilorda, Kzyl-Orda, etc.) (KZ-43)
Zone	Asia/Qyzylorda	4:21:52 -	LMT	1924 May  2
			4:00	-	%z	1930 Jun 21
			5:00	-	%z	1981 Apr  1
			5:00	1:00	%z	1981 Oct  1
			6:00	-	%z	1982 Apr  1
			5:00 RussiaAsia	%z	1991 Mar 31  2:00s
			4:00 RussiaAsia	%z	1991 Sep 29  2:00s
			5:00 RussiaAsia	%z	1992 Jan 19  2:00s
			6:00 RussiaAsia	%z	1992 Mar 29  2:00s
			5:00 RussiaAsia	%z	2004 Oct 31  2:00s
			6:00	-	%z	2018 Dec 21  0:00
			5:00	-	%z
# Qostanay (aka Kostanay, Kustanay) (KZ-39)
# The 1991/2 rules are unclear partly because of the 1997 Turgai
# reorganization.
Zone	Asia/Qostanay	4:14:28 -	LMT	1924 May  2
			4:00	-	%z	1930 Jun 21
			5:00	-	%z	1981 Apr  1
			5:00	1:00	%z	1981 Oct  1
			6:00	-	%z	1982 Apr  1
			5:00 RussiaAsia	%z	1991 Mar 31  2:00s
			4:00 RussiaAsia	%z	1992 Jan 19  2:00s
			5:00 RussiaAsia	%z	2004 Oct 31  2:00s
			6:00	-	%z	2024 Mar  1  0:00
			5:00	-	%z
# Aqtöbe (aka Aktobe, formerly Aktyubinsk) (KZ-15)
Zone	Asia/Aqtobe	3:48:40	-	LMT	1924 May  2
			4:00	-	%z	1930 Jun 21
			5:00	-	%z	1981 Apr  1
			5:00	1:00	%z	1981 Oct  1
			6:00	-	%z	1982 Apr  1
			5:00 RussiaAsia	%z	1991 Mar 31  2:00s
			4:00 RussiaAsia	%z	1992 Jan 19  2:00s
			5:00 RussiaAsia	%z	2004 Oct 31  2:00s
			5:00	-	%z
# Mangghystaū (KZ-47)
# Aqtau was not founded until 1963, but it represents an inhabited region,
# so include timestamps before 1963.
Zone	Asia/Aqtau	3:21:04	-	LMT	1924 May  2
			4:00	-	%z	1930 Jun 21
			5:00	-	%z	1981 Oct  1
			6:00	-	%z	1982 Apr  1
			5:00 RussiaAsia	%z	1991 Mar 31  2:00s
			4:00 RussiaAsia	%z	1992 Jan 19  2:00s
			5:00 RussiaAsia	%z	1994 Sep 25  2:00s
			4:00 RussiaAsia	%z	2004 Oct 31  2:00s
			5:00	-	%z
# Atyraū (KZ-23) is like Mangghystaū except it switched from
# +04/+05 to +05/+06 in spring 1999, not fall 1994.
Zone	Asia/Atyrau	3:27:44	-	LMT	1924 May  2
			3:00	-	%z	1930 Jun 21
			5:00	-	%z	1981 Oct  1
			6:00	-	%z	1982 Apr  1
			5:00 RussiaAsia	%z	1991 Mar 31  2:00s
			4:00 RussiaAsia	%z	1992 Jan 19  2:00s
			5:00 RussiaAsia	%z	1999 Mar 28  2:00s
			4:00 RussiaAsia	%z	2004 Oct 31  2:00s
			5:00	-	%z
# West Kazakhstan (KZ-27)
# From Paul Eggert (2016-03-18):
# The 1989 transition is from USSR act No. 227 (1989-03-14).
Zone	Asia/Oral	3:25:24	-	LMT	1924 May  2 # or Ural'sk
			3:00	-	%z	1930 Jun 21
			5:00	-	%z	1981 Apr  1
			5:00	1:00	%z	1981 Oct  1
			6:00	-	%z	1982 Apr  1
			5:00 RussiaAsia	%z	1989 Mar 26  2:00s
			4:00 RussiaAsia	%z	1992 Jan 19  2:00s
			5:00 RussiaAsia	%z	1992 Mar 29  2:00s
			4:00 RussiaAsia	%z	2004 Oct 31  2:00s
			5:00	-	%z

# Kyrgyzstan (Kirgizstan)
# Transitions through 1991 are from Shanks & Pottenger.

# From Paul Eggert (2005-08-15):
# According to an article dated today in the Kyrgyzstan Development Gateway
# http://eng.gateway.kg/cgi-bin/page.pl?id=1&story_name=doc9979.shtml
# Kyrgyzstan is canceling the daylight saving time system.  I take the article
# to mean that they will leave their clocks at 6 hours ahead of UTC.
# From Malik Abdugaliev (2005-09-21):
# Our government cancels daylight saving time 6th of August 2005.
# From 2005-08-12 our GMT-offset is +6, w/o any daylight saving.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Kyrgyz	1992	1996	-	Apr	Sun>=7	0:00s	1:00	-
Rule	Kyrgyz	1992	1996	-	Sep	lastSun	0:00	0	-
Rule	Kyrgyz	1997	2005	-	Mar	lastSun	2:30	1:00	-
Rule	Kyrgyz	1997	2004	-	Oct	lastSun	2:30	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Bishkek	4:58:24 -	LMT	1924 May  2
			5:00	-	%z	1930 Jun 21
			6:00 RussiaAsia %z	1991 Mar 31  2:00s
			5:00 RussiaAsia	%z	1991 Aug 31  2:00
			5:00	Kyrgyz	%z	2005 Aug 12
			6:00	-	%z

###############################################################################

# Korea (North and South)

# From Annie I. Bang (2006-07-10):
# http://www.koreaherald.com/view.php?ud=200607100012
# Korea ran a daylight saving program from 1949-61 but stopped it
# during the 1950-53 Korean War.  The system was temporarily enforced
# between 1987 and 1988 ...

# From Sanghyuk Jung (2014-10-29):
# https://mm.icann.org/pipermail/tz/2014-October/021830.html
# According to the Korean Wikipedia
# https://ko.wikipedia.org/wiki/한국_표준시
# [oldid=12896437 2014-09-04 08:03 UTC]
# DST in Republic of Korea was as follows....  And I checked old
# newspapers in Korean, all articles correspond with data in Wikipedia.
# For example, the article in 1948 (Korean Language) proved that DST
# started at June 1 in that year.  For another example, the article in
# 1988 said that DST started at 2:00 AM in that year.

# From Phake Nick (2018-10-27):
# 1. According to official announcement from Korean government, the DST end
# date in South Korea should be
# 1955-09-08 without specifying time
# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027977557
# 1956-09-29 without specifying time
# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027978341
# 1957-09-21 24 o'clock
# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027979690#3
# 1958-09-20 24 o'clock
# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027981189
# 1959-09-19 24 o'clock
# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027982974#2
# 1960-09-17 24 o'clock
# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0028044104
# ...
# 2.... https://namu.wiki/w/대한민국%20표준시 ... [says]
# when Korea was using GMT+8:30 as standard time, the international
# aviation/marine/meteorological industry in the country refused to
# follow and continued to use GMT+9:00 for interoperability.


# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	ROK	1948	only	-	Jun	 1	 0:00	1:00	D
Rule	ROK	1948	only	-	Sep	12	24:00	0	S
Rule	ROK	1949	only	-	Apr	 3	 0:00	1:00	D
Rule	ROK	1949	1951	-	Sep	Sat>=7	24:00	0	S
Rule	ROK	1950	only	-	Apr	 1	 0:00	1:00	D
Rule	ROK	1951	only	-	May	 6	 0:00	1:00	D
Rule	ROK	1955	only	-	May	 5	 0:00	1:00	D
Rule	ROK	1955	only	-	Sep	 8	24:00	0	S
Rule	ROK	1956	only	-	May	20	 0:00	1:00	D
Rule	ROK	1956	only	-	Sep	29	24:00	0	S
Rule	ROK	1957	1960	-	May	Sun>=1	 0:00	1:00	D
Rule	ROK	1957	1960	-	Sep	Sat>=17	24:00	0	S
Rule	ROK	1987	1988	-	May	Sun>=8	 2:00	1:00	D
Rule	ROK	1987	1988	-	Oct	Sun>=8	 3:00	0	S

# From Paul Eggert (2016-08-23):
# The Korean Wikipedia entry gives the following sources for UT offsets:
#
# 1908: Official Journal Article No. 3994 (decree No. 5)
# 1912: Governor-General of Korea Official Gazette Issue No. 367
#       (Announcement No. 338)
# 1954: Presidential Decree No. 876 (1954-03-17)
# 1961: Law No. 676 (1961-08-07)
#
# (Another source "1987: Law No. 3919 (1986-12-31)" was in the 2014-10-30
# edition of the Korean Wikipedia entry.)
#
# I guessed that time zone abbreviations through 1945 followed the same
# rules as discussed under Taiwan, with nominal switches from JST to KST
# when the respective cities were taken over by the Allies after WWII.
#
# For Pyongyang, guess no changes from World War II until 2015, as we
# have no information otherwise.

# From Steffen Thorsen (2015-08-07):
# According to many news sources, North Korea is going to change to
# the 8:30 time zone on August 15, one example:
# http://www.bbc.com/news/world-asia-33815049
#
# From Paul Eggert (2015-08-15):
# Bells rang out midnight (00:00) Friday as part of the celebrations.  See:
# Talmadge E. North Korea celebrates new time zone, 'Pyongyang Time'
# http://news.yahoo.com/north-korea-celebrates-time-zone-pyongyang-time-164038128.html
# There is no common English-language abbreviation for this time zone.
# Use KST, as that's what we already use for 1954-1961 in ROK.

# From Kang Seonghoon (2018-04-29):
# North Korea will revert its time zone from UTC+8:30 (PYT; Pyongyang
# Time) back to UTC+9 (KST; Korea Standard Time).
#
# From Seo Sanghyeon (2018-04-30):
# Rodong Sinmun 2018-04-30 announced Pyongyang Time transition plan.
# https://www.nknews.org/kcna/wp-content/uploads/sites/5/2018/04/rodong-2018-04-30.pdf
# ... the transition date is 2018-05-05 ...  Citation should be Decree
# No. 2232 of April 30, 2018, of the Presidium of the Supreme People's
# Assembly, as published in Rodong Sinmun.
# From Tim Parenti (2018-04-29):
# It appears to be the front page story at the top in the right-most column.
#
# From Paul Eggert (2018-05-04):
# The BBC reported that the transition was from 23:30 to 24:00 today.
# https://www.bbc.com/news/world-asia-44010705

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Seoul	8:27:52	-	LMT	1908 Apr  1
			8:30	-	KST	1912 Jan  1
			9:00	-	JST	1945 Sep  8
			9:00	ROK	K%sT	1954 Mar 21
			8:30	ROK	K%sT	1961 Aug 10
			9:00	ROK	K%sT
Zone	Asia/Pyongyang	8:23:00 -	LMT	1908 Apr  1
			8:30	-	KST	1912 Jan  1
			9:00	-	JST	1945 Aug 24
			9:00	-	KST	2015 Aug 15 00:00
			8:30	-	KST	2018 May  4 23:30
			9:00	-	KST


# Lebanon
#
# From Saadallah Itani (2023-03-23):
# Lebanon ... announced today delay of Spring forward from March 25 to April 20.
#
# From Paul Eggert (2023-03-27):
# This announcement was by the Lebanese caretaker prime minister Najib Mikati.
# https://www.mtv.com.lb/en/News/Local/1352516/lebanon-postpones-daylight-saving-time-adoption
# A video was later leaked to the media of parliament speaker Nabih Berri
# asking Mikati to postpone DST to aid observance of Ramadan, Mikati objecting
# that this would cause problems such as scheduling airline flights, to which
# Berri interjected, "What flights?"
#
# The change was controversial and led to a partly-sectarian divide.
# Many Lebanese institutions, including the education ministry, the Maronite
# church, and two news channels LCBI and MTV, ignored the announcement and
# went ahead with the long-scheduled spring-forward on March 25/26, some
# arguing that the prime minister had not followed the law because the change
# had not been approved by the cabinet.  Google went with the announcement;
# Apple ignored it.  At least one bank followed the announcement for its doors,
# but ignored the announcement in internal computer systems.
# Beirut international airport listed two times for each departure.
# Dan Azzi wrote "My view is that this whole thing is a Dumb and Dumber movie."
# Eventually the prime minister backed down, said the cabinet had decided to
# stick with its 1998 decision, and that DST would begin midnight March 29/30.
# https://www.nna-leb.gov.lb/en/miscellaneous/604093/lebanon-has-two-times-of-day-amid-daylight-savings
# https://www.cnbc.com/2023/03/27/lebanon-in-two-different-time-zones-as-government-disagrees-on-daylight-savings.html
#
# Although we could model the chaos with two Zones, that would likely cause
# more trouble than it would cure.  Since so many manual clocks and
# computer-based timestamps ignored the announcement, stick with official
# cabinet resolutions in the data while recording the prime minister's
# announcement as a comment.  This is how we treated a similar situation in
# Rio de Janeiro in spring 1993.
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Lebanon	1920	only	-	Mar	28	0:00	1:00	S
Rule	Lebanon	1920	only	-	Oct	25	0:00	0	-
Rule	Lebanon	1921	only	-	Apr	3	0:00	1:00	S
Rule	Lebanon	1921	only	-	Oct	3	0:00	0	-
Rule	Lebanon	1922	only	-	Mar	26	0:00	1:00	S
Rule	Lebanon	1922	only	-	Oct	8	0:00	0	-
Rule	Lebanon	1923	only	-	Apr	22	0:00	1:00	S
Rule	Lebanon	1923	only	-	Sep	16	0:00	0	-
Rule	Lebanon	1957	1961	-	May	1	0:00	1:00	S
Rule	Lebanon	1957	1961	-	Oct	1	0:00	0	-
Rule	Lebanon	1972	only	-	Jun	22	0:00	1:00	S
Rule	Lebanon	1972	1977	-	Oct	1	0:00	0	-
Rule	Lebanon	1973	1977	-	May	1	0:00	1:00	S
Rule	Lebanon	1978	only	-	Apr	30	0:00	1:00	S
Rule	Lebanon	1978	only	-	Sep	30	0:00	0	-
Rule	Lebanon	1984	1987	-	May	1	0:00	1:00	S
Rule	Lebanon	1984	1991	-	Oct	16	0:00	0	-
Rule	Lebanon	1988	only	-	Jun	1	0:00	1:00	S
Rule	Lebanon	1989	only	-	May	10	0:00	1:00	S
Rule	Lebanon	1990	1992	-	May	1	0:00	1:00	S
Rule	Lebanon	1992	only	-	Oct	4	0:00	0	-
Rule	Lebanon	1993	max	-	Mar	lastSun	0:00	1:00	S
Rule	Lebanon	1993	1998	-	Sep	lastSun	0:00	0	-
Rule	Lebanon	1999	max	-	Oct	lastSun	0:00	0	-
# This one-time rule, announced by the prime minister first for April 21
# then for March 30, is commented out for reasons described above.
#Rule	Lebanon	2023	only	-	Mar	30	0:00	1:00	S

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Beirut	2:22:00 -	LMT	1880
			2:00	Lebanon	EE%sT

# Brunei
# Malaysia (eastern)
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	NBorneo	1935	1941	-	Sep	14	0:00	0:20	-
Rule	NBorneo	1935	1941	-	Dec	14	0:00	0	-
#
# For peninsular Malaysia see Asia/Singapore.
#
# Sabah & Sarawak
# From Paul Eggert (2014-08-12):
# The data entries here are mostly from Shanks & Pottenger, but the 1942, 1945
# and 1982 transition dates are from Mok Ly Yng.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Asia/Kuching	7:21:20	-	LMT	1926 Mar
			7:30	-	%z	1933
			8:00 NBorneo	%z	1942 Feb 16
			9:00	-	%z	1945 Sep 12
			8:00	-	%z

# Maldives
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Indian/Maldives	4:54:00 -	LMT	1880 # Malé
			4:54:00	-	MMT	1960 # Malé Mean Time
			5:00	-	%z

# Mongolia

# Shanks & Pottenger say that Mongolia has three time zones, but
# The USNO (1995-12-21) and the CIA map Standard Time Zones of the World
# (2005-03) both say that it has just one.

# From Oscar van Vlijmen (1999-12-11):
# General Information Mongolia
# <http://www.mongoliatourism.gov.mn/general.htm> (1999-09)
# "Time: Mongolia has two time zones. Three westernmost provinces of
# Bayan-Ölgii, Uvs, and Hovd are one hour earlier than the capital city, and
# the rest of the country follows the Ulaanbaatar time, which is UTC/GMT plus
# eight hours."

# From Rives McDow (1999-12-13):
# Mongolia discontinued the use of daylight savings time in 1999; 1998
# being the last year it was implemented.  The dates of implementation I am
# unsure of, but most probably it was similar to Russia, except for the time
# of implementation may have been different....
# Some maps in the past have indicated that there was an additional time
# zone in the eastern part of Mongolia, including the provinces of Dornod,
# Sükhbaatar, and possibly Khentii.

# From Paul Eggert (1999-12-15):
# Naming and spelling is tricky in Mongolia.
# We'll use Hovd (also spelled Chovd and Khovd) to represent the west zone;
# the capital of the Hovd province is sometimes called Hovd, sometimes Dund-Us,
# and sometimes Jirgalanta (with variant spellings), but the name Hovd
# is good enough for our purposes.

# From Rives McDow (2001-05-13):
# In addition to Mongolia starting daylight savings as reported earlier
# (adopted DST on 2001-04-27 02:00 local time, ending 2001-09-28),
# there are three time zones.
#
# Provinces [at 7:00]: Bayan-Ölgii, Uvs, Khovd, Zavkhan, Govi-Altai
# Provinces [at 8:00]: Khövsgöl, Bulgan, Arkhangai, Khentii, Töv,
#	Bayankhongor, Övörkhangai, Dundgovi, Dornogovi, Ömnögovi
# Provinces [at 9:00]: Dornod, Sükhbaatar
#
# [The province of Selenge is omitted from the above lists.]

# From Ganbold Ts., Ulaanbaatar (2004-04-17):
# Daylight saving occurs at 02:00 local time last Saturday of March.
# It will change back to normal at 02:00 local time last Saturday of
# September.... As I remember this rule was changed in 2001.
#
# From Paul Eggert (2004-04-17):
# For now, assume Rives McDow's informant got confused about Friday vs
# Saturday, and that his 2001 dates should have 1 added to them.

# From Paul Eggert (2005-07-26):
# We have wildly conflicting information about Mongolia's time zones.
# Bill Bonnet (2005-05-19) reports that the US Embassy in Ulaanbaatar says
# there is only one time zone and that DST is observed, citing Microsoft
# Windows XP as the source.  Risto Nykänen (2005-05-16) reports that
# travelmongolia.org says there are two time zones (UT +07, +08) with no DST.
# Oscar van Vlijmen (2005-05-20) reports that the Mongolian Embassy in
# Washington, DC says there are two time zones, with DST observed.
# He also found
# http://ubpost.mongolnews.mn/index.php?subaction=showcomments&id=1111634894&archive=&start_from=&ucat=1&
# which also says that there is DST, and which has a comment by "Toddius"
# (2005-03-31 06:05 +0700) saying "Mongolia actually has 3.5 time zones.
# The West (OLGII) is +7 GMT, most of the country is ULAT is +8 GMT
# and some Eastern provinces are +9 GMT but Sükhbaatar Aimag is SUHK +8.5 GMT.
# The SUKH timezone is new this year, it is one of the few things the
# parliament passed during the tumultuous winter session."
# For now, let's ignore this information, until we have more confirmation.

# From Ganbold Ts. (2007-02-26):
# Parliament of Mongolia has just changed the daylight-saving rule in February.
# They decided not to adopt daylight-saving time....
# http://www.mongolnews.mn/index.php?module=unuudur&sec=view&id=15742

# From Deborah Goldsmith (2008-03-30):
# We received a bug report claiming that the tz database UTC offset for
# Asia/Choibalsan (GMT+09:00) is incorrect, and that it should be GMT
# +08:00 instead. Different sources appear to disagree with the tz
# database on this, e.g.:
#
# https://www.timeanddate.com/worldclock/city.html?n=1026
# http://www.worldtimeserver.com/current_time_in_MN.aspx
#
# both say GMT+08:00.

# From Steffen Thorsen (2008-03-31):
# eznis airways, which operates several domestic flights, has a flight
# schedule here:
# http://www.eznis.com/Container.jsp?id=112
# (click the English flag for English)
#
# There it appears that flights between Choibalsan and Ulaanbaatar arrive
# about 1:35 - 1:50 hours later in local clock time, no matter the
# direction, while Ulaanbaatar-Khovd takes 2 hours in the Eastern
# direction and 3:35 back, which indicates that Ulaanbaatar and Khovd are
# in different time zones (like we know about), while Choibalsan and
# Ulaanbaatar are in the same time zone (correction needed).

# From Arthur David Olson (2008-05-19):
# Assume that Choibalsan is indeed offset by 8:00.

# From Heitor David Pinto (2024-06-23):
# Sources about time zones in Mongolia seem to list one of two conflicting
# configurations.  The first configuration, mentioned in a comment to the TZ
# database in 1999, citing a Mongolian government website, lists the provinces
# of Bayan-Ölgii, Khovd and Uvs in UTC+7, and the rest of the country in
# UTC+8.  The second configuration, mentioned in a comment to the database in
# 2001, lists Bayan-Ölgii, Khovd, Uvs, Govi-Altai and Zavkhan in UTC+7, Dornod
# and Sükhbaatar in UTC+9, and the rest of the country in UTC+8.
#
# The first configuration is still mentioned by several Mongolian travel
# agencies:
# https://www.adventurerider.mn/en/page/about_mongolia
# http://www.naturetours.mn/nt/mongolia.php
# https://www.newjuulchin.mn/web/content/7506?unique=fa24a0f6e96e022a3578ee5195ac879638c734ce
#
# It also matches these flight schedules in 2013:
# http://web.archive.org/web/20130722023600/https://www.hunnuair.com/en/timetabled
# The flight times imply that the airports of Uliastai (Zavkhan), Choibalsan
# (Dornod) and Altai (Govi-Altai) are in the same time zone as Ulaanbaatar,
# and Khovd is one hour behind....
#
# The second configuration was mentioned by an official of the Mongolian
# standards agency in an interview in 2014: https://ikon.mn/n/9v6
# And it's still listed by the Mongolian aviation agency:
# https://ais.mn/files/aip/eAIP/2023-12-25/html/eSUP/ZM-eSUP-23-04-en-MN.html
#
# ... I believe that the first configuration is what is actually observed in
# Mongolia and has been so all along, at least since 1999.  The second
# configuration closely matches the ideal time zone boundaries at 97.5° E and
# 112.5° E but it doesn't seem to be used in practice.

# From Ganbold Tsagaankhuu (2015-03-10):
# It seems like yesterday Mongolian Government meeting has concluded to use
# daylight saving time in Mongolia....  Starting at 2:00AM of last Saturday of
# March 2015, daylight saving time starts.  And 00:00AM of last Saturday of
# September daylight saving time ends.  Source:
# http://zasag.mn/news/view/8969

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Mongol	1983	1984	-	Apr	1	0:00	1:00	-
Rule	Mongol	1983	only	-	Oct	1	0:00	0	-
# Shanks & Pottenger and IATA SSIM say 1990s switches occurred at 00:00,
# but McDow says the 2001 switches occurred at 02:00.  Also, IATA SSIM
# (1996-09) says 1996-10-25.  Go with Shanks & Pottenger through 1998.
#
# Shanks & Pottenger say that the Sept. 1984 through Sept. 1990 switches
# in Choibalsan (more precisely, in Dornod and Sükhbaatar) took place
# at 02:00 standard time, not at 00:00 local time as in the rest of
# the country.  That would be odd, and possibly is a result of their
# correction of 02:00 (in the previous edition) not being done correctly
# in the latest edition; so ignore it for now.

# From Ganbold Tsagaankhuu (2017-02-09):
# Mongolian Government meeting has concluded today to cancel daylight
# saving time adoption in Mongolia.  Source: http://zasag.mn/news/view/16192

Rule	Mongol	1985	1998	-	Mar	lastSun	0:00	1:00	-
Rule	Mongol	1984	1998	-	Sep	lastSun	0:00	0	-
# IATA SSIM (1999-09) says Mongolia no longer observes DST.
Rule	Mongol	2001	only	-	Apr	lastSat	2:00	1:00	-
Rule	Mongol	2001	2006	-	Sep	lastSat	2:00	0	-
Rule	Mongol	2002	2006	-	Mar	lastSat	2:00	1:00	-
Rule	Mongol	2015	2016	-	Mar	lastSat	2:00	1:00	-
Rule	Mongol	2015	2016	-	Sep	lastSat	0:00	0	-

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
# Hovd, a.k.a. Chovd, Dund-Us, Dzhargalant, Khovd, Jirgalanta
Zone	Asia/Hovd	6:06:36 -	LMT	1905 Aug
			6:00	-	%z	1978
			7:00	Mongol	%z
# Ulaanbaatar, a.k.a. Ulan Bataar, Ulan Bator, Urga
Zone	Asia/Ulaanbaatar 7:07:32 -	LMT	1905 Aug
			7:00	-	%z	1978
			8:00	Mongol	%z

# Nepal
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Kathmandu	5:41:16 -	LMT	1920
			5:30	-	%z	1986
			5:45	-	%z

# Pakistan

# From Rives McDow (2002-03-13):
# I have been advised that Pakistan has decided to adopt dst on a
# TRIAL basis for one year, starting 00:01 local time on April 7, 2002
# and ending at 00:01 local time October 6, 2002.  This is what I was
# told, but I believe that the actual time of change may be 00:00; the
# 00:01 was to make it clear which day it was on.

# From Paul Eggert (2002-03-15):
# Jesper Nørgaard found this URL:
# http://www.pak.gov.pk/public/news/app/app06_dec.htm
# (dated 2001-12-06) which says that the Cabinet adopted a scheme "to
# advance the clocks by one hour on the night between the first
# Saturday and Sunday of April and revert to the original position on
# 15th October each year".  This agrees with McDow's 04-07 at 00:00,
# but disagrees about the October transition, and makes it sound like
# it's not on a trial basis.  Also, the "between the first Saturday
# and Sunday of April" phrase, if taken literally, means that the
# transition takes place at 00:00 on the first Sunday on or after 04-02.

# From Paul Eggert (2003-02-09):
# DAWN <http://www.dawn.com/2002/10/06/top13.htm> reported on 2002-10-05
# that 2002 DST ended that day at midnight.  Go with McDow for now.

# From Steffen Thorsen (2003-03-14):
# According to http://www.dawn.com/2003/03/07/top15.htm
# there will be no DST in Pakistan this year:
#
# ISLAMABAD, March 6: Information and Media Development Minister Sheikh
# Rashid Ahmed on Thursday said the cabinet had reversed a previous
# decision to advance clocks by one hour in summer and put them back by
# one hour in winter with the aim of saving light hours and energy.
#
# The minister told a news conference that the experiment had rather
# shown 8 per cent higher consumption of electricity.

# From Alex Krivenyshev (2008-05-15):
#
# Here is an article that Pakistan plan to introduce Daylight Saving Time
# on June 1, 2008 for 3 months.
#
# "... The federal cabinet on Wednesday announced a new conservation plan to
# help reduce load shedding by approving the closure of commercial centres at
# 9pm and moving clocks forward by one hour for the next three months. ...."
#
# http://www.worldtimezone.com/dst_news/dst_news_pakistan01.html
# http://www.dailytimes.com.pk/default.asp?page=2008\05\15\story_15-5-2008_pg1_4

# From Arthur David Olson (2008-05-19):
# XXX--midnight transitions is a guess; 2008 only is a guess.

# From Alexander Krivenyshev (2008-08-28):
# Pakistan government has decided to keep the watches one-hour advanced
# for another 2 months - plan to return to Standard Time on October 31
# instead of August 31.
#
# http://www.worldtimezone.com/dst_news/dst_news_pakistan02.html
# http://dailymailnews.com/200808/28/news/dmbrn03.html

# From Alexander Krivenyshev (2009-04-08):
# Based on previous media reports that "... proposed plan to
# advance clocks by one hour from May 1 will cause disturbance
# to the working schedules rather than bringing discipline in
# official working."
# http://www.thenews.com.pk/daily_detail.asp?id=171280
#
# recent news that instead of May 2009 - Pakistan plan to
# introduce DST from April 15, 2009
#
# FYI: Associated Press Of Pakistan
# April 08, 2009
# Cabinet okays proposal to advance clocks by one hour from April 15
# http://www.app.com.pk/en_/index.php?option=com_content&task=view&id=73043&Itemid=1
# http://www.worldtimezone.com/dst_news/dst_news_pakistan05.html
#
# ....
# The Federal Cabinet on Wednesday approved the proposal to
# advance clocks in the country by one hour from April 15 to
# conserve energy"

# From Steffen Thorsen (2009-09-17):
# "The News International," Pakistan reports that: "The Federal
# Government has decided to restore the previous time by moving the
# clocks backward by one hour from October 1. A formal announcement to
# this effect will be made after the Prime Minister grants approval in
# this regard."
# http://www.thenews.com.pk/updates.asp?id=87168

# From Alexander Krivenyshev (2009-09-28):
# According to Associated Press Of Pakistan, it is confirmed that
# Pakistan clocks across the country would be turned back by an hour from
# October 1, 2009.
#
# "Clocks to go back one hour from 1 Oct"
# http://www.app.com.pk/en_/index.php?option=com_content&task=view&id=86715&Itemid=2
# http://www.worldtimezone.com/dst_news/dst_news_pakistan07.htm
#
# From Steffen Thorsen (2009-09-29):
# Now they seem to have changed their mind, November 1 is the new date:
# http://www.thenews.com.pk/top_story_detail.asp?Id=24742
# "The country's clocks will be reversed by one hour on November 1.
# Officials of Federal Ministry for Interior told this to Geo News on
# Monday."
#
# And more importantly, it seems that these dates will be kept every year:
# "It has now been decided that clocks will be wound forward by one hour
# on April 15 and reversed by an hour on November 1 every year without
# obtaining prior approval, the officials added."
#
# We have confirmed this year's end date with both with the Ministry of
# Water and Power and the Pakistan Electric Power Company:
# https://www.timeanddate.com/news/time/pakistan-ends-dst09.html

# From Christoph Göhre (2009-10-01):
# [T]he German Consulate General in Karachi reported me today that Pakistan
# will go back to standard time on 1st of November.

# From Steffen Thorsen (2010-03-26):
# Steffen Thorsen wrote:
# > On Thursday (2010-03-25) it was announced that DST would start in
# > Pakistan on 2010-04-01.
# >
# > Then today, the president said that they might have to revert the
# > decision if it is not supported by the parliament. So at the time
# > being, it seems unclear if DST will be actually observed or not - but
# > April 1 could be a more likely date than April 15.
# Now, it seems that the decision to not observe DST in final:
#
# "Govt Withdraws Plan To Advance Clocks"
# http://www.apakistannews.com/govt-withdraws-plan-to-advance-clocks-172041
#
# "People laud PM's announcement to end DST"
# http://www.app.com.pk/en_/index.php?option=com_content&task=view&id=99374&Itemid=2

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule Pakistan	2002	only	-	Apr	Sun>=2	0:00	1:00	S
Rule Pakistan	2002	only	-	Oct	Sun>=2	0:00	0	-
Rule Pakistan	2008	only	-	Jun	1	0:00	1:00	S
Rule Pakistan	2008	2009	-	Nov	1	0:00	0	-
Rule Pakistan	2009	only	-	Apr	15	0:00	1:00	S

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Karachi	4:28:12 -	LMT	1907
			5:30	-	%z	1942 Sep
			5:30	1:00	%z	1945 Oct 15
			5:30	-	%z	1951 Sep 30
			5:00	-	%z	1971 Mar 26
			5:00 Pakistan	PK%sT	# Pakistan Time

# Palestine

# From Amos Shapir (1998-02-15):
#
# From 1917 until 1948-05-15, all of Palestine, including the parts now
# known as the Gaza Strip and the West Bank, was under British rule.
# Therefore the rules given for Israel for that period, apply there too...
#
# The Gaza Strip was under Egyptian rule between 1948-05-15 until 1967-06-05
# (except a short occupation by Israel from 1956-11 till 1957-03, but no
# time zone was affected then).  It was never formally annexed to Egypt,
# though.
#
# The rest of Palestine was under Jordanian rule at that time, formally
# annexed in 1950 as the West Bank (and the word "Trans" was dropped from
# the country's previous name of "the Hashemite Kingdom of the
# Trans-Jordan").  So the rules for Jordan for that time apply.  Major
# towns in that area are Nablus (Shchem), El-Halil (Hebron), Ramallah, and
# East Jerusalem.
#
# Both areas were occupied by Israel in June 1967, but not annexed (except
# for East Jerusalem).  They were on Israel time since then; there might
# have been a Military Governor's order about time zones, but I'm not aware
# of any (such orders may have been issued semi-annually whenever summer
# time was in effect, but maybe the legal aspect of time was just neglected).
#
# The Palestinian Authority was established in 1993, and got hold of most
# towns in the West Bank and Gaza by 1995.  I know that in order to
# demonstrate...independence, they have been switching to
# summer time and back on a different schedule than Israel's, but I don't
# know when this was started, or what algorithm is used (most likely the
# Jordanian one).
#
# To summarize, the table should probably look something like that:
#
# Area \ when | 1918-1947 | 1948-1967 | 1967-1995 | 1996-
# ------------+-----------+-----------+-----------+-----------
# Israel      | Zion      | Zion      | Zion      | Zion
# West bank   | Zion      | Jordan    | Zion      | Jordan
# Gaza        | Zion      | Egypt     | Zion      | Jordan
#
# I guess more info may be available from the PA's web page (if/when they
# have one).

# From Paul Eggert (2006-03-22):
# Shanks & Pottenger write that Gaza did not observe DST until 1957, but go
# with Shapir and assume that it observed DST from 1940 through 1947,
# and that it used Jordanian rules starting in 1996.
# We don't yet need a separate entry for the West Bank, since
# the only differences between it and Gaza that we know about
# occurred before our cutoff date of 1970.
# However, as we get more information, we may need to add entries
# for parts of the West Bank as they transitioned from Israel's rules
# to Palestine's rules.

# From IINS News Service - Israel - 1998-03-23 10:38:07 Israel time,
# forwarded by Ephraim Silverberg:
#
# Despite the fact that Israel changed over to daylight savings time
# last week, the PLO Authority (PA) has decided not to turn its clocks
# one-hour forward at this time.  As a sign of independence from Israeli rule,
# the PA has decided to implement DST in April.

# From Paul Eggert (1999-09-20):
# Daoud Kuttab writes in Holiday havoc
# http://www.jpost.com/com/Archive/22.Apr.1999/Opinion/Article-2.html
# (Jerusalem Post, 1999-04-22) that
# the Palestinian National Authority changed to DST on 1999-04-15.
# I vaguely recall that they switch back in October (sorry, forgot the source).
# For now, let's assume that the spring switch was at 24:00,
# and that they switch at 0:00 on the 3rd Fridays of April and October.

# From Paul Eggert (2005-11-22):
# Starting 2004 transitions are from Steffen Thorsen's web site timeanddate.com.

# From Steffen Thorsen (2005-11-23):
# A user from Gaza reported that Gaza made the change early because of
# the Ramadan.  Next year Ramadan will be even earlier, so I think
# there is a good chance next year's end date will be around two weeks
# earlier - the same goes for Jordan.

# From Steffen Thorsen (2006-08-17):
# I was informed by a user in Bethlehem that in Bethlehem it started the
# same day as Israel, and after checking with other users in the area, I
# was informed that they started DST one day after Israel.  I was not
# able to find any authoritative sources at the time, nor details if
# Gaza changed as well, but presumed Gaza to follow the same rules as
# the West Bank.

# From Steffen Thorsen (2006-09-26):
# according to the Palestine News Network (2006-09-19):
# http://english.pnn.ps/index.php?option=com_content&task=view&id=596&Itemid=5
# > The Council of Ministers announced that this year its winter schedule
# > will begin early, as of midnight Thursday.  It is also time to turn
# > back the clocks for winter.  Friday will begin an hour late this week.
# I guess it is likely that next year's date will be moved as well,
# because of the Ramadan.

# From Jesper Nørgaard Welen (2007-09-18):
# According to Steffen Thorsen's web site the Gaza Strip and the rest of the
# Palestinian territories left DST early on 13.th. of September at 2:00.

# From Paul Eggert (2007-09-20):
# My understanding is that Gaza and the West Bank disagree even over when
# the weekend is (Thursday+Friday versus Friday+Saturday), so I'd be a bit
# surprised if they agreed about DST.  But for now, assume they agree.
# For lack of better information, predict that future changes will be
# the 2nd Thursday of September at 02:00.

# From Alexander Krivenyshev (2008-08-28):
# Here is an article, that Mideast running on different clocks at Ramadan.
#
# Gaza Strip (as Egypt) ended DST at midnight Thursday (Aug 28, 2008), while
# the West Bank will end Daylight Saving Time at midnight Sunday (Aug 31, 2008).
#
# http://www.guardian.co.uk/world/feedarticle/7759001
# http://www.abcnews.go.com/International/wireStory?id=5676087
# http://www.worldtimezone.com/dst_news/dst_news_gazastrip01.html

# From Alexander Krivenyshev (2009-03-26):
# According to the Palestine News Network (arabic.pnn.ps), Palestinian
# government decided to start Daylight Time on Thursday night March
# 26 and continue until the night of 27 September 2009.
#
# (in Arabic)
# http://arabic.pnn.ps/index.php?option=com_content&task=view&id=50850
#
# (English translation)
# http://www.worldtimezone.com/dst_news/dst_news_westbank01.html

# From Steffen Thorsen (2009-08-31):
# Palestine's Council of Ministers announced that they will revert back to
# winter time on Friday, 2009-09-04.
#
# One news source:
# http://www.safa.ps/ara/?action=showdetail&seid=4158
# (Palestinian press agency, Arabic),
# Google translate: "Decided that the Palestinian government in Ramallah
# headed by Salam Fayyad, the start of work in time for the winter of
# 2009, starting on Friday approved the fourth delay Sept. clock sixty
# minutes per hour as of Friday morning."
#
# We are not sure if Gaza will do the same, last year they had a different
# end date, we will keep this page updated:
# https://www.timeanddate.com/news/time/westbank-gaza-dst-2009.html

# From Alexander Krivenyshev (2009-09-02):
# Seems that Gaza Strip will go back to Winter Time same date as West Bank.
#
# According to Palestinian Ministry Of Interior, West Bank and Gaza Strip plan
# to change time back to Standard time on September 4, 2009.
#
# "Winter time unite the West Bank and Gaza"
# (from Palestinian National Authority):
# http://www.moi.gov.ps/en/?page=633167343250594025&nid=11505
# http://www.worldtimezone.com/dst_news/dst_news_gazastrip02.html

# From Alexander Krivenyshev (2010-03-19):
# According to Voice of Palestine DST will last for 191 days, from March
# 26, 2010 till "the last Sunday before the tenth day of Tishri
# (October), each year" (October 03, 2010?)
#
# http://palvoice.org/forums/showthread.php?t=245697
# (in Arabic)
# http://www.worldtimezone.com/dst_news/dst_news_westbank03.html

# From Steffen Thorsen (2010-03-24):
# ...Ma'an News Agency reports that Hamas cabinet has decided it will
# start one day later, at 12:01am. Not sure if they really mean 12:01am or
# noon though:
#
# http://www.maannews.net/eng/ViewDetails.aspx?ID=271178
# (Ma'an News Agency)
# "At 12:01am Friday, clocks in Israel and the West Bank will change to
# 1:01am, while Gaza clocks will change at 12:01am Saturday morning."

# From Steffen Thorsen (2010-08-11):
# According to several sources, including
# http://www.maannews.net/eng/ViewDetails.aspx?ID=306795
# the clocks were set back one hour at 2010-08-11 00:00:00 local time in
# Gaza and the West Bank.
# Some more background info:
# https://www.timeanddate.com/news/time/westbank-gaza-end-dst-2010.html

# From Steffen Thorsen (2011-08-26):
# Gaza and the West Bank did go back to standard time in the beginning of
# August, and will now enter daylight saving time again on 2011-08-30
# 00:00 (so two periods of DST in 2011). The pause was because of
# Ramadan.
#
# http://www.maannews.net/eng/ViewDetails.aspx?ID=416217
# Additional info:
# https://www.timeanddate.com/news/time/palestine-dst-2011.html

# From Alexander Krivenyshev (2011-08-27):
# According to the article in The Jerusalem Post:
# "...Earlier this month, the Palestinian government in the West Bank decided to
# move to standard time for 30 days, during Ramadan. The Palestinians in the
# Gaza Strip accepted the change and also moved their clocks one hour back.
# The Hamas government said on Saturday that it won't observe summertime after
# the Muslim feast of Id al-Fitr, which begins on Tuesday..."
# ...
# https://www.jpost.com/MiddleEast/Article.aspx?id=235650
# http://www.worldtimezone.com/dst_news/dst_news_gazastrip05.html
# The rules for Egypt are stolen from the 'africa' file.

# From Steffen Thorsen (2011-09-30):
# West Bank did end Daylight Saving Time this morning/midnight (2011-09-30
# 00:00).
# So West Bank and Gaza now have the same time again.
#
# Many sources, including:
# http://www.maannews.net/eng/ViewDetails.aspx?ID=424808

# From Steffen Thorsen (2012-03-26):
# Palestinian news sources tell that both Gaza and West Bank will start DST
# on Friday (Thursday midnight, 2012-03-29 24:00).
# Some of many sources in Arabic:
# http://www.samanews.com/index.php?act=Show&id=122638
#
# http://safa.ps/details/news/74352/بدء-التوقيت-الصيفي-بالضفة-وغزة-ليلة-الجمعة.html
#
# Our brief summary:
# https://www.timeanddate.com/news/time/gaza-west-bank-dst-2012.html

# From Steffen Thorsen (2013-03-26):
# The following news sources tells that Palestine will "start daylight saving
# time from midnight on Friday, March 29, 2013" (translated).
# [These are in Arabic and are for Gaza and for Ramallah, respectively.]
# http://www.samanews.com/index.php?act=Show&id=154120
# http://safa.ps/details/news/99844/رام-الله-بدء-التوقيت-الصيفي-29-الجاري.html

# From Steffen Thorsen (2013-09-24):
# The Gaza and West Bank are ending DST Thursday at midnight
# (2013-09-27 00:00:00) (one hour earlier than last year...).
# This source in English, says "that winter time will go into effect
# at midnight on Thursday in the West Bank and Gaza Strip":
# http://english.wafa.ps/index.php?action=detail&id=23246
# official source...:
# http://www.palestinecabinet.gov.ps/ar/Views/ViewDetails.aspx?pid=1252

# From Steffen Thorsen (2015-03-03):
# Sources such as http://www.alquds.com/news/article/view/id/548257
# and https://www.raya.ps/ar/news/890705.html say Palestine areas will
# start DST on 2015-03-28 00:00 which is one day later than expected.
#
# From Paul Eggert (2015-03-03):
# https://www.timeanddate.com/time/change/west-bank/ramallah?year=2014
# says that the fall 2014 transition was Oct 23 at 24:00.

# From Hannah Kreitem (2016-03-09):
# http://www.palestinecabinet.gov.ps/WebSite/ar/ViewDetails?ID=31728
# [Google translation]: "The Council also decided to start daylight
# saving in Palestine as of one o'clock on Saturday morning,
# 2016-03-26, to provide the clock 60 minutes ahead."

# From Sharef Mustafa (2016-10-19):
# [T]he Palestinian cabinet decision (Mar 8th 2016) published on
# http://www.palestinecabinet.gov.ps/WebSite/Upload/Decree/GOV_17/16032016134830.pdf
# states that summer time will end on Oct 29th at 01:00.

# From Sharef Mustafa (2018-03-16):
# Palestine summer time will start on Mar 24th 2018 ...
# http://www.palestinecabinet.gov.ps/Website/AR/NDecrees/ViewFile.ashx?ID=e7a42ab7-ee23-435a-b9c8-a4f7e81f3817

# From Even Scharning (2019-03-23):
# http://pnn.ps/news/401130
# http://palweather.ps/ar/node/50136.html
#
# From Sharif Mustafa (2019-03-26):
# The Palestinian cabinet announced today that the switch to DST will
# be on Fri Mar 29th 2019 by advancing the clock by 60 minutes.
# http://palestinecabinet.gov.ps/Website/AR/NDecrees/ViewFile.ashx?ID=e54e9ea1-50ee-4137-84df-0d6c78da259b
#
# From Even Scharning (2019-04-10):
# Our source in Palestine said it happened Friday 29 at 00:00 local time....

# From Sharef Mustafa (2019-10-18):
# Palestine summer time will end on midnight Oct 26th 2019 ...
#
# From Steffen Thorsen (2020-10-20):
# Some sources such as these say, and display on clocks, that DST ended at
# midnight last year...
# https://www.amad.ps/ar/post/320006
#
# From Tim Parenti (2020-10-20):
# The report of the Palestinian Cabinet meeting of 2019-10-14 confirms
# a decision on (translated): "The start of the winter time in Palestine, by
# delaying the clock by sixty minutes, starting from midnight on Friday /
# Saturday corresponding to 26/10/2019."
# http://www.palestinecabinet.gov.ps/portal/meeting/details/43948

# From Sharef Mustafa (2020-10-20):
# As per the palestinian cabinet announcement yesterday , the day light saving
# shall [end] on Oct 24th 2020 at 01:00AM by delaying the clock by 60 minutes.
# http://www.palestinecabinet.gov.ps/portal/Meeting/Details/51584

# From Pierre Cashon (2020-10-20):
# The summer time this year started on March 28 at 00:00.
# https://wafa.ps/ar_page.aspx?id=GveQNZa872839351758aGveQNZ
# http://www.palestinecabinet.gov.ps/portal/meeting/details/50284
# The winter time in 2015 started on October 23 at 01:00.
# https://wafa.ps/ar_page.aspx?id=CgpCdYa670694628582aCgpCdY
# http://www.palestinecabinet.gov.ps/portal/meeting/details/27583

# From P Chan (2021-10-18):
# http://wafa.ps/Pages/Details/34701
# Palestine winter time will start from midnight 2021-10-29 (Thursday-Friday).
#
# From Heba Hemad, Palestine Ministry of Telecom & IT (2021-10-20):
# ... winter time will begin in Palestine from Friday 10-29, 01:00 AM
# by 60 minutes backwards.
#
# From Tim Parenti (2021-10-25), per Paul Eggert (2021-10-24):
# Guess future fall transitions at 01:00 on the Friday preceding October's
# last Sunday (i.e., Fri>=23), as this is more consistent with recent practice.

# From Heba Hamad (2022-03-10):
# summer time will begin in Palestine from Sunday 03-27-2022, 00:00 AM.

# From Heba Hamad (2022-08-30):
# winter time will begin in Palestine from Saturday 10-29, 02:00 AM by
# 60 minutes backwards.  Also the state of Palestine adopted the summer
# and winter time for the years: 2023,2024,2025,2026 ...
# https://mm.icann.org/pipermail/tz/attachments/20220830/9f024566/Time-0001.pdf
# (2022-08-31): ... the Saturday before the last Sunday in March and October
# at 2:00 AM ,for the years from 2023 to 2026.
# (2022-09-05): https://mtit.pna.ps/Site/New/1453

# From Heba Hamad (2023-03-22):
# ... summer time will begin in Palestine from Saturday 04-29-2023,
# 02:00 AM by 60 minutes forward.
# From Heba Hemad (2023-10-09):
# ... winter time will begin in Palestine from Saturday 10-28-2023,
# 02:00 AM by 60 minutes back.
#
# From Heba Hamad (2024-01-25):
# the summer time for the years 2024,2025 will begin in Palestine
# from Saturday at 02:00 AM by 60 minutes forward as shown below:
# year date
# 2024 2024-04-20
# 2025 2025-04-12
#
# From Paul Eggert (2024-01-25):
# For now, guess that spring and fall transitions will normally
# continue to use 2022's rules, that during DST Palestine will switch
# to standard time at 02:00 the last Saturday before Ramadan and back
# to DST at 02:00 the second Saturday after Ramadan, and that
# if the normal spring-forward or fall-back transition occurs during
# Ramadan the former is delayed and the latter advanced.
# To implement this, I predicted Ramadan-oriented transition dates for
# 2026 through 2086 by running the following program under GNU Emacs 29.2,
# with the results integrated by hand into the table below.
# Predictions after 2086 are approximated without Ramadan.
#
# (let ((islamic-year 1447))
#   (require 'cal-islam)
#   (while (< islamic-year 1510)
#     (let ((a (calendar-islamic-to-absolute (list 9 1 islamic-year)))
#           (b (+ 1 (calendar-islamic-to-absolute (list 10 1 islamic-year))))
#           (saturday 6))
#       (while (/= saturday (mod (setq a (1- a)) 7)))
#       (while (/= saturday (mod b 7))
#         (setq b (1+ b)))
#       (setq b (+ 7 b))
#       (setq a (calendar-gregorian-from-absolute a))
#       (setq b (calendar-gregorian-from-absolute b))
#       (insert
#        (format
#         (concat "Rule Palestine\t%d\tonly\t-\t%s\t%2d\t2:00\t0\t-\n"
#                 "Rule Palestine\t%d\tonly\t-\t%s\t%2d\t2:00\t1:00\tS\n")
#         (car (cdr (cdr a))) (calendar-month-name (car a) t) (car (cdr a))
#         (car (cdr (cdr b))) (calendar-month-name (car b) t) (car (cdr b)))))
#     (setq islamic-year (+ 1 islamic-year))))

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule EgyptAsia	1957	only	-	May	10	0:00	1:00	S
Rule EgyptAsia	1957	1958	-	Oct	 1	0:00	0	-
Rule EgyptAsia	1958	only	-	May	 1	0:00	1:00	S
Rule EgyptAsia	1959	1967	-	May	 1	1:00	1:00	S
Rule EgyptAsia	1959	1965	-	Sep	30	3:00	0	-
Rule EgyptAsia	1966	only	-	Oct	 1	3:00	0	-

Rule Palestine	1999	2005	-	Apr	Fri>=15	0:00	1:00	S
Rule Palestine	1999	2003	-	Oct	Fri>=15	0:00	0	-
Rule Palestine	2004	only	-	Oct	 1	1:00	0	-
Rule Palestine	2005	only	-	Oct	 4	2:00	0	-
Rule Palestine	2006	2007	-	Apr	 1	0:00	1:00	S
Rule Palestine	2006	only	-	Sep	22	0:00	0	-
Rule Palestine	2007	only	-	Sep	13	2:00	0	-
Rule Palestine	2008	2009	-	Mar	lastFri	0:00	1:00	S
Rule Palestine	2008	only	-	Sep	 1	0:00	0	-
Rule Palestine	2009	only	-	Sep	 4	1:00	0	-
Rule Palestine	2010	only	-	Mar	26	0:00	1:00	S
Rule Palestine	2010	only	-	Aug	11	0:00	0	-
Rule Palestine	2011	only	-	Apr	 1	0:01	1:00	S
Rule Palestine	2011	only	-	Aug	 1	0:00	0	-
Rule Palestine	2011	only	-	Aug	30	0:00	1:00	S
Rule Palestine	2011	only	-	Sep	30	0:00	0	-
Rule Palestine	2012	2014	-	Mar	lastThu	24:00	1:00	S
Rule Palestine	2012	only	-	Sep	21	1:00	0	-
Rule Palestine	2013	only	-	Sep	27	0:00	0	-
Rule Palestine	2014	only	-	Oct	24	0:00	0	-
Rule Palestine	2015	only	-	Mar	28	0:00	1:00	S
Rule Palestine	2015	only	-	Oct	23	1:00	0	-
Rule Palestine	2016	2018	-	Mar	Sat<=30	1:00	1:00	S
Rule Palestine	2016	2018	-	Oct	Sat<=30	1:00	0	-
Rule Palestine	2019	only	-	Mar	29	0:00	1:00	S
Rule Palestine	2019	only	-	Oct	Sat<=30	0:00	0	-
Rule Palestine	2020	2021	-	Mar	Sat<=30	0:00	1:00	S
Rule Palestine	2020	only	-	Oct	24	1:00	0	-
Rule Palestine	2021	only	-	Oct	29	1:00	0	-
Rule Palestine	2022	only	-	Mar	27	0:00	1:00	S
Rule Palestine	2022	2035	-	Oct	Sat<=30	2:00	0	-
Rule Palestine	2023	only	-	Apr	29	2:00	1:00	S
Rule Palestine	2024	only	-	Apr	20	2:00	1:00	S
Rule Palestine	2025	only	-	Apr	12	2:00	1:00	S
Rule Palestine	2026	2054	-	Mar	Sat<=30	2:00	1:00	S
Rule Palestine	2036	only	-	Oct	18	2:00	0	-
Rule Palestine	2037	only	-	Oct	10	2:00	0	-
Rule Palestine	2038	only	-	Sep	25	2:00	0	-
Rule Palestine	2039	only	-	Sep	17	2:00	0	-
Rule Palestine	2040	only	-	Sep	 1	2:00	0	-
Rule Palestine	2040	only	-	Oct	20	2:00	1:00	S
Rule Palestine	2040	2067	-	Oct	Sat<=30	2:00	0	-
Rule Palestine	2041	only	-	Aug	24	2:00	0	-
Rule Palestine	2041	only	-	Oct	 5	2:00	1:00	S
Rule Palestine	2042	only	-	Aug	16	2:00	0	-
Rule Palestine	2042	only	-	Sep	27	2:00	1:00	S
Rule Palestine	2043	only	-	Aug	 1	2:00	0	-
Rule Palestine	2043	only	-	Sep	19	2:00	1:00	S
Rule Palestine	2044	only	-	Jul	23	2:00	0	-
Rule Palestine	2044	only	-	Sep	 3	2:00	1:00	S
Rule Palestine	2045	only	-	Jul	15	2:00	0	-
Rule Palestine	2045	only	-	Aug	26	2:00	1:00	S
Rule Palestine	2046	only	-	Jun	30	2:00	0	-
Rule Palestine	2046	only	-	Aug	18	2:00	1:00	S
Rule Palestine	2047	only	-	Jun	22	2:00	0	-
Rule Palestine	2047	only	-	Aug	 3	2:00	1:00	S
Rule Palestine	2048	only	-	Jun	 6	2:00	0	-
Rule Palestine	2048	only	-	Jul	25	2:00	1:00	S
Rule Palestine	2049	only	-	May	29	2:00	0	-
Rule Palestine	2049	only	-	Jul	10	2:00	1:00	S
Rule Palestine	2050	only	-	May	21	2:00	0	-
Rule Palestine	2050	only	-	Jul	 2	2:00	1:00	S
Rule Palestine	2051	only	-	May	 6	2:00	0	-
Rule Palestine	2051	only	-	Jun	24	2:00	1:00	S
Rule Palestine	2052	only	-	Apr	27	2:00	0	-
Rule Palestine	2052	only	-	Jun	 8	2:00	1:00	S
Rule Palestine	2053	only	-	Apr	12	2:00	0	-
Rule Palestine	2053	only	-	May	31	2:00	1:00	S
Rule Palestine	2054	only	-	Apr	 4	2:00	0	-
Rule Palestine	2054	only	-	May	23	2:00	1:00	S
Rule Palestine	2055	only	-	May	 8	2:00	1:00	S
Rule Palestine	2056	only	-	Apr	29	2:00	1:00	S
Rule Palestine	2057	only	-	Apr	14	2:00	1:00	S
Rule Palestine	2058	only	-	Apr	 6	2:00	1:00	S
Rule Palestine	2059	max	-	Mar	Sat<=30	2:00	1:00	S
Rule Palestine	2068	only	-	Oct	20	2:00	0	-
Rule Palestine	2069	only	-	Oct	12	2:00	0	-
Rule Palestine	2070	only	-	Oct	 4	2:00	0	-
Rule Palestine	2071	only	-	Sep	19	2:00	0	-
Rule Palestine	2072	only	-	Sep	10	2:00	0	-
Rule Palestine	2072	only	-	Oct	22	2:00	1:00	S
Rule Palestine	2072	max	-	Oct	Sat<=30	2:00	0	-
Rule Palestine	2073	only	-	Sep	 2	2:00	0	-
Rule Palestine	2073	only	-	Oct	14	2:00	1:00	S
Rule Palestine	2074	only	-	Aug	18	2:00	0	-
Rule Palestine	2074	only	-	Oct	 6	2:00	1:00	S
Rule Palestine	2075	only	-	Aug	10	2:00	0	-
Rule Palestine	2075	only	-	Sep	21	2:00	1:00	S
Rule Palestine	2076	only	-	Jul	25	2:00	0	-
Rule Palestine	2076	only	-	Sep	12	2:00	1:00	S
Rule Palestine	2077	only	-	Jul	17	2:00	0	-
Rule Palestine	2077	only	-	Sep	 4	2:00	1:00	S
Rule Palestine	2078	only	-	Jul	 9	2:00	0	-
Rule Palestine	2078	only	-	Aug	20	2:00	1:00	S
Rule Palestine	2079	only	-	Jun	24	2:00	0	-
Rule Palestine	2079	only	-	Aug	12	2:00	1:00	S
Rule Palestine	2080	only	-	Jun	15	2:00	0	-
Rule Palestine	2080	only	-	Jul	27	2:00	1:00	S
Rule Palestine	2081	only	-	Jun	 7	2:00	0	-
Rule Palestine	2081	only	-	Jul	19	2:00	1:00	S
Rule Palestine	2082	only	-	May	23	2:00	0	-
Rule Palestine	2082	only	-	Jul	11	2:00	1:00	S
Rule Palestine	2083	only	-	May	15	2:00	0	-
Rule Palestine	2083	only	-	Jun	26	2:00	1:00	S
Rule Palestine	2084	only	-	Apr	29	2:00	0	-
Rule Palestine	2084	only	-	Jun	17	2:00	1:00	S
Rule Palestine	2085	only	-	Apr	21	2:00	0	-
Rule Palestine	2085	only	-	Jun	 9	2:00	1:00	S
Rule Palestine	2086	only	-	Apr	13	2:00	0	-
Rule Palestine	2086	only	-	May	25	2:00	1:00	S

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Gaza	2:17:52	-	LMT	1900 Oct
			2:00	Zion	EET/EEST 1948 May 15
			2:00 EgyptAsia	EE%sT	1967 Jun  5
			2:00	Zion	I%sT	1996
			2:00	Jordan	EE%sT	1999
			2:00 Palestine	EE%sT	2008 Aug 29  0:00
			2:00	-	EET	2008 Sep
			2:00 Palestine	EE%sT	2010
			2:00	-	EET	2010 Mar 27  0:01
			2:00 Palestine	EE%sT	2011 Aug  1
			2:00	-	EET	2012
			2:00 Palestine	EE%sT

Zone	Asia/Hebron	2:20:23	-	LMT	1900 Oct
			2:00	Zion	EET/EEST 1948 May 15
			2:00 EgyptAsia	EE%sT	1967 Jun  5
			2:00	Zion	I%sT	1996
			2:00	Jordan	EE%sT	1999
			2:00 Palestine	EE%sT

# Paracel Is
# no information

# Philippines

# From Paul Eggert (2024-01-21):
# The Spanish initially used American (west-of-Greenwich) time.
# It is unknown what time Manila kept when the British occupied it from
# 1762-10-06 through 1764-04; for now assume it kept American time.
# On 1844-08-16, Narciso Clavería, governor-general of the
# Philippines, issued a proclamation announcing that 1844-12-30 was to
# be immediately followed by 1845-01-01; see R.H. van Gent's
# History of the International Date Line
# https://webspace.science.uu.nl/~gent0113/idl/idl_philippines.htm

# From P Chan (2021-05-10):
# Here's a fairly comprehensive article in Japanese:
#	https://wiki.suikawiki.org/n/Philippine%20Time
# (2021-05-16):
# According to the references listed in the article,
# the periods that the Philippines (Manila) observed DST or used +9 are:
#
# 1936-10-31 24:00 to 1937-01-15 24:00
#	(Proclamation No. 104, Proclamation No. 126)
# 1941-12-15 24:00 to 1945-11-30 24:00
#	(Proclamation No. 789, Proclamation No. 20)
# 1954-04-11 24:00 to 1954-06-04 24:00
#	(Proclamation No. 13, Proclamation No. 33)
# 1977-03-27 24:00 to 1977-09-21 24:00
#	(Proclamation No. 1629, Proclamation No. 1641)
# 1990-05-21 00:00 to 1990-07-28 24:00
#	(National Emergency Memorandum Order No. 17, Executive Order No. 415)
#
# Proclamation No. 104 ... October 30, 1936
#  https://www.officialgazette.gov.ph/1936/10/30/proclamation-no-104-s-1936/
# Proclamation No. 126 ... January 15, 1937
#  https://www.officialgazette.gov.ph/1937/01/15/proclamation-no-126-s-1937/
# Proclamation No. 789 ... December 13, 1941
#  https://www.officialgazette.gov.ph/1941/12/13/proclamation-no-789-s-1941/
# Proclamation No. 20 ... November 11, 1945
#  https://www.officialgazette.gov.ph/1945/11/11/proclamation-no-20-s-1945/
# Proclamation No. 13 ... April 6, 1954
#  https://www.officialgazette.gov.ph/1954/04/06/proclamation-no-13-s-1954/
# Proclamation No. 33 ... June 3, 1954
#  https://www.officialgazette.gov.ph/1954/06/03/proclamation-no-33-s-1954/
# Proclamation No. 1629 ... March 25, 1977
#  https://www.officialgazette.gov.ph/1977/03/25/proclamation-no-1629-s-1977/
# Proclamation No. 1641 ...May 26, 1977
#  https://www.officialgazette.gov.ph/1977/05/26/proclamation-no-1641-s-1977/
# National Emergency Memorandum Order No. 17 ... May 2, 1990
#  https://www.officialgazette.gov.ph/1990/05/02/national-emergency-memorandum-order-no-17-s-1990/
# Executive Order No. 415 ... July 20, 1990
#  https://www.officialgazette.gov.ph/1990/07/20/executive-order-no-415-s-1990/
#
# During WWII, Proclamation No. 789 fixed two periods of DST. The first period
# was set to continue only until January 31, 1942. But Manila was occupied by
# the Japanese earlier in the month....
#
# For the date of the adoption of standard time, Shank[s] gives 1899-05-11.
# The article is not able to state the basis of that. I guess it was based on
# a US War Department Circular issued on that date.
#	https://books.google.com/books?id=JZ1PAAAAYAAJ&pg=RA3-PA8
#
# However, according to other sources, standard time was adopted on
# 1899-09-06.  Also, the LMT was GMT+8:03:52
#	https://books.google.com/books?id=MOYIAQAAIAAJ&pg=PA521
#	https://books.google.com/books?id=lSnqqatpYikC&pg=PA21
#
# From Paul Eggert (2024-09-05):
# The penultimate URL in P Chan's email refers to page 521 of
# Selga M, The Time Service in the Philippines.
# Proc Pan-Pacific Science Congress. Vol. 1 (1923), 519-532.
# It says, "The change from the meridian 120° 58' 04" to the 120th implied a
# change of 3 min. 52s.26 in time; consequently on 6th September, 1899,
# Manila Observatory gave the noon signal 3 min. 52s.26 later than before".
#
# Wikipedia says the US declared Manila liberated on March 4, 1945;
# this doesn't affect clocks, just our time zone abbreviation and DST flag.

# From Paul Goyette (2018-06-15) with URLs updated by Guy Harris (2024-02-15):
# In the Philippines, there is a national law, Republic Act No. 10535
# which declares the official time here as "Philippine Standard Time".
# The act [1] even specifies use of PST as the abbreviation, although
# the FAQ provided by PAGASA [2] uses the "acronym PhST to distinguish
# it from the Pacific Standard Time (PST)."
# [1] https://www.officialgazette.gov.ph/2013/05/15/republic-act-no-10535/
# [2] https://prsd.pagasa.dost.gov.ph/index.php/28-astronomy/302-philippine-standard-time
#
# From Paul Eggert (2018-06-19):
# I surveyed recent news reports, and my impression is that "PST" is
# more popular among reliable English-language news sources.  This is
# not just a measure of Google hit counts: it's also the sizes and
# influence of the sources.  There is no current abbreviation for DST,
# so use "PDT", the usual American style.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Phil	1936	only	-	Oct	31	24:00	1:00	D
Rule	Phil	1937	only	-	Jan	15	24:00	0	S
Rule	Phil	1941	only	-	Dec	15	24:00	1:00	D
# The following three rules were canceled by Japan:
#Rule	Phil	1942	only	-	Jan	31	24:00	0	S
#Rule	Phil	1942	only	-	Mar	 1	 0:00	1:00	D
#Rule	Phil	1942	only	-	Jun	30	24:00	0	S
Rule	Phil	1945	only	-	Nov	30	24:00	0	S
Rule	Phil	1954	only	-	Apr	11	24:00	1:00	D
Rule	Phil	1954	only	-	Jun	 4	24:00	0	S
Rule	Phil	1977	only	-	Mar	27	24:00	1:00	D
Rule	Phil	1977	only	-	Sep	21	24:00	0	S
Rule	Phil	1990	only	-	May	21	 0:00	1:00	D
Rule	Phil	1990	only	-	Jul	28	24:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Manila	-15:56:08 -	LMT	1844 Dec 31
			8:03:52 -	LMT	1899 Sep  6  4:00u
			8:00	Phil	P%sT	1942 Feb 11 24:00
			9:00	-	JST	1945 Mar  4
			8:00	Phil	P%sT

# Bahrain
# Qatar
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Qatar	3:26:08 -	LMT	1920     # Al Dawhah / Doha
			4:00	-	%z	1972 Jun
			3:00	-	%z

# Kuwait
# Saudi Arabia
# Yemen
#
# Japan's year-round bases in Antarctica match this since 1970.
#
# From Paul Eggert (2018-08-29):
# Time in Saudi Arabia and other countries in the Arabian peninsula was not
# standardized until 1968 or so; we don't know exactly when, and possibly it
# has never been made official.  Richard P Hunt, in "Islam city yielding to
# modern times", New York Times (1961-04-09), p 20, wrote that only airlines
# observed standard time, and that people in Jeddah mostly observed quasi-solar
# time, doing so by setting their watches at sunrise to 6 o'clock (or to 12
# o'clock for "Arab" time).
#
# Timekeeping differed depending on who you were and which part of Saudi
# Arabia you were in.  In 1969, Elias Antar wrote that although a common
# practice had been to set one's watch to 12:00 (i.e., midnight) at sunset -
# which meant that the time on one side of a mountain could differ greatly from
# the time on the other side - many foreigners set their watches to 6pm
# instead, while airlines instead used UTC +03 (except in Dhahran, where they
# used UTC +04), Aramco used UTC +03 with DST, and the Trans-Arabian Pipe Line
# Company used Aramco time in eastern Saudi Arabia and airline time in western.
# (The American Military Aid Advisory Group used plain UTC.)  Antar writes,
# "A man named Higgins, so the story goes, used to run a local power
# station. One day, the whole thing became too much for Higgins and he
# assembled his staff and laid down the law. 'I've had enough of this,' he
# shrieked. 'It is now 12 o'clock Higgins Time, and from now on this station is
# going to run on Higgins Time.' And so, until last year, it did."  See:
# Antar E. Dinner at When? Saudi Aramco World, 1969 March/April. 2-3.
# http://archive.aramcoworld.com/issue/196902/dinner.at.when.htm
# Also see: Antar EN. Arabian flying is confusing.
# Port Angeles (WA) Evening News. 1965-03-10. page 3.
#
# The TZ database cannot represent quasi-solar time; airline time is the best
# we can do.  The 1946 foreign air news digest of the U.S. Civil Aeronautics
# Board (OCLC 42299995) reported that the "... Arabian Government, inaugurated
# a weekly Dhahran-Cairo service, via the Saudi Arabian cities of Riyadh and
# Jidda, on March 14, 1947".  Shanks & Pottenger guessed 1950; go with the
# earlier date.
#
# Shanks & Pottenger also state that until 1968-05-01 Saudi Arabia had two
# time zones; the other zone, at UT +04, was in the far eastern part of
# the country.  Presumably this is documenting airline time.  Ignore this,
# as it's before our 1970 cutoff.
#
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Riyadh	3:06:52 -	LMT	1947 Mar 14
			3:00	-	%z

# Singapore
# taken from Mok Ly Yng (2003-10-30)
# https://web.archive.org/web/20190822231045/http://www.math.nus.edu.sg/~mathelmr/teaching/timezone.html
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Singapore	6:55:25 -	LMT	1901 Jan  1
			6:55:25	-	SMT	1905 Jun  1 # Singapore M.T.
			7:00	-	%z	1933 Jan  1
			7:00	0:20	%z	1936 Jan  1
			7:20	-	%z	1941 Sep  1
			7:30	-	%z	1942 Feb 16
			9:00	-	%z	1945 Sep 12
			7:30	-	%z	1981 Dec 31 16:00u
			8:00	-	%z

# Spratly Is
# no information

# Sri Lanka

# From Paul Eggert (2013-02-21):
# Milne says "Madras mean time use from May 1, 1898.  Prior to this Colombo
# mean time, 5h. 4m. 21.9s. F., was used."  But 5:04:21.9 differs considerably
# from Colombo's meridian 5:19:24, so for now ignore Milne and stick with
# Shanks and Pottenger.

# From Paul Eggert (1996-09-03):
# "Sri Lanka advances clock by an hour to avoid blackout"
# (<http://www.virtual-pc.com/lankaweb/news/items/240596-2.html>, 1996-05-24,
# no longer available as of 1999-08-17)
# reported "the country's standard time will be put forward by one hour at
# midnight Friday (1830 GMT) 'in the light of the present power crisis'."
#
# From Dharmasiri Senanayake, Sri Lanka Media Minister (1996-10-24), as quoted
# by Shamindra in Daily News - Hot News Section
# <news:54rka5$m5h@mtinsc01-mgt.ops.worldnet.att.net> (1996-10-26):
# With effect from 12.30 a.m. on 26th October 1996
# Sri Lanka will be six (06) hours ahead of GMT.

# From Jesper Nørgaard Welen (2006-04-14), quoting Sri Lanka News Online
# <http://news.sinhalaya.com/wmview.php?ArtID=11002> (2006-04-13):
# 0030 hrs on April 15, 2006 (midnight of April 14, 2006 +30 minutes)
# at present, become 2400 hours of April 14, 2006 (midnight of April 14, 2006).

# From Peter Apps and Ranga Sirila of Reuters (2006-04-12) in:
# http://today.reuters.co.uk/news/newsArticle.aspx?type=scienceNews&storyID=2006-04-12T172228Z_01_COL295762_RTRIDST_0_SCIENCE-SRILANKA-TIME-DC.XML
# [The Tamil Tigers] never accepted the original 1996 time change and simply
# kept their clocks set five and a half hours ahead of Greenwich Mean
# Time (GMT), in line with neighbor India.
# From Paul Eggert (2006-04-18):
# People who live in regions under Tamil control can use [TZ='Asia/Kolkata'],
# as that zone has agreed with the Tamil areas since our cutoff date of 1970.

# From Sadika Sumanapala (2016-10-19):
# According to http://www.sltime.org (maintained by Measurement Units,
# Standards & Services Department, Sri Lanka) abbreviation for Sri Lanka
# standard time is SLST.
#
# From Paul Eggert (2016-10-18):
# "SLST" seems to be reasonably recent and rarely used outside time
# zone nerd sources.  I searched Google News and found three uses of
# it in the International Business Times of India in February and
# March of this year when discussing cricket match times, but nothing
# since then (though there has been a lot of cricket) and nothing in
# other English-language news sources.  Our old abbreviation "LKT" is
# even worse.  For now, let's use a numeric abbreviation; we can
# switch to "SLST" if it catches on.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Colombo	5:19:24 -	LMT	1880
			5:19:32	-	MMT	1906        # Moratuwa Mean Time
			5:30	-	%z	1942 Jan  5
			5:30	0:30	%z	1942 Sep
			5:30	1:00	%z	1945 Oct 16  2:00
			5:30	-	%z	1996 May 25  0:00
			6:30	-	%z	1996 Oct 26  0:30
			6:00	-	%z	2006 Apr 15  0:30
			5:30	-	%z

# Syria
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Syria	1920	1923	-	Apr	Sun>=15	2:00	1:00	S
Rule	Syria	1920	1923	-	Oct	Sun>=1	2:00	0	-
Rule	Syria	1962	only	-	Apr	29	2:00	1:00	S
Rule	Syria	1962	only	-	Oct	1	2:00	0	-
Rule	Syria	1963	1965	-	May	1	2:00	1:00	S
Rule	Syria	1963	only	-	Sep	30	2:00	0	-
Rule	Syria	1964	only	-	Oct	1	2:00	0	-
Rule	Syria	1965	only	-	Sep	30	2:00	0	-
Rule	Syria	1966	only	-	Apr	24	2:00	1:00	S
Rule	Syria	1966	1976	-	Oct	1	2:00	0	-
Rule	Syria	1967	1978	-	May	1	2:00	1:00	S
Rule	Syria	1977	1978	-	Sep	1	2:00	0	-
Rule	Syria	1983	1984	-	Apr	9	2:00	1:00	S
Rule	Syria	1983	1984	-	Oct	1	2:00	0	-
Rule	Syria	1986	only	-	Feb	16	2:00	1:00	S
Rule	Syria	1986	only	-	Oct	9	2:00	0	-
Rule	Syria	1987	only	-	Mar	1	2:00	1:00	S
Rule	Syria	1987	1988	-	Oct	31	2:00	0	-
Rule	Syria	1988	only	-	Mar	15	2:00	1:00	S
Rule	Syria	1989	only	-	Mar	31	2:00	1:00	S
Rule	Syria	1989	only	-	Oct	1	2:00	0	-
Rule	Syria	1990	only	-	Apr	1	2:00	1:00	S
Rule	Syria	1990	only	-	Sep	30	2:00	0	-
Rule	Syria	1991	only	-	Apr	 1	0:00	1:00	S
Rule	Syria	1991	1992	-	Oct	 1	0:00	0	-
Rule	Syria	1992	only	-	Apr	 8	0:00	1:00	S
Rule	Syria	1993	only	-	Mar	26	0:00	1:00	S
Rule	Syria	1993	only	-	Sep	25	0:00	0	-
# IATA SSIM (1998-02) says 1998-04-02;
# (1998-09) says 1999-03-29 and 1999-09-29; (1999-02) says 1999-04-02,
# 2000-04-02, and 2001-04-02; (1999-09) says 2000-03-31 and 2001-03-31;
# (2006) says 2006-03-31 and 2006-09-22;
# for now ignore all these claims and go with Shanks & Pottenger,
# except for the 2006-09-22 claim (which seems right for Ramadan).
Rule	Syria	1994	1996	-	Apr	 1	0:00	1:00	S
Rule	Syria	1994	2005	-	Oct	 1	0:00	0	-
Rule	Syria	1997	1998	-	Mar	lastMon	0:00	1:00	S
Rule	Syria	1999	2006	-	Apr	 1	0:00	1:00	S
# From Stephen Colebourne (2006-09-18):
# According to IATA data, Syria will change DST on 21st September [21:00 UTC]
# this year [only]....  This is probably related to Ramadan, like Egypt.
Rule	Syria	2006	only	-	Sep	22	0:00	0	-
# From Paul Eggert (2007-03-29):
# Today the AP reported "Syria will switch to summertime at midnight Thursday."
# http://www.iht.com/articles/ap/2007/03/29/africa/ME-GEN-Syria-Time-Change.php
Rule	Syria	2007	only	-	Mar	lastFri	0:00	1:00	S
# From Jesper Nørgaard (2007-10-27):
# The sister center ICARDA of my work CIMMYT is confirming that Syria DST will
# not take place 1st November at 0:00 o'clock but 1st November at 24:00 or
# rather Midnight between Thursday and Friday. This does make more sense than
# having it between Wednesday and Thursday (two workdays in Syria) since the
# weekend in Syria is not Saturday and Sunday, but Friday and Saturday. So now
# it is implemented at midnight of the last workday before weekend...
#
# From Steffen Thorsen (2007-10-27):
# Jesper Nørgaard Welen wrote:
#
# > "Winter local time in Syria will be observed at midnight of Thursday 1
# > November 2007, and the clock will be put back 1 hour."
#
# I found confirmation on this in this gov.sy-article (Arabic):
# http://wehda.alwehda.gov.sy/_print_veiw.asp?FileName=12521710520070926111247
#
# which using Google's translate tools says:
# Council of Ministers also approved the commencement of work on
# identifying the winter time as of Friday, 2/11/2007 where the 60th
# minute delay at midnight Thursday 1/11/2007.
Rule	Syria	2007	only	-	Nov	 Fri>=1	0:00	0	-

# From Stephen Colebourne (2008-03-17):
# For everyone's info, I saw an IATA time zone change for [Syria] for
# this month (March 2008) in the last day or so....
# Country     Time Standard   --- DST Start ---   --- DST End ---  DST
# Name        Zone Variation   Time    Date        Time    Date
# Variation
# Syrian Arab
# Republic    SY    +0200      2200  03APR08       2100  30SEP08   +0300
#                              2200  02APR09       2100  30SEP09   +0300
#                              2200  01APR10       2100  30SEP10   +0300

# From Arthur David Olson (2008-03-17):
# Here's a link to English-language coverage by the Syrian Arab News
# Agency (SANA)...
# http://www.sana.sy/eng/21/2008/03/11/165173.htm
# ...which reads (in part) "The Cabinet approved the suggestion of the
# Ministry of Electricity to begin daylight savings time on Friday April
# 4th, advancing clocks one hour ahead on midnight of Thursday April 3rd."
# Since Syria is two hours east of UTC, the 2200 and 2100 transition times
# shown above match up with midnight in Syria.

# From Arthur David Olson (2008-03-18):
# My best guess at a Syrian rule is "the Friday nearest April 1";
# coding that involves either using a "Mar Fri>=29" construct that old time zone
# compilers can't handle  or having multiple Rules (a la Israel).
# For now, use "Apr Fri>=1", and go with IATA on a uniform Sep 30 end.

# From Steffen Thorsen (2008-10-07):
# Syria has now officially decided to end DST on 2008-11-01 this year,
# according to the following article in the Syrian Arab News Agency (SANA).
#
# The article is in Arabic, and seems to tell that they will go back to
# winter time on 2008-11-01 at 00:00 local daylight time (delaying/setting
# clocks back 60 minutes).
#
# http://sana.sy/ara/2/2008/10/07/195459.htm

# From Steffen Thorsen (2009-03-19):
# Syria will start DST on 2009-03-27 00:00 this year according to many sources,
# two examples:
#
# http://www.sana.sy/eng/21/2009/03/17/217563.htm
# (English, Syrian Arab News # Agency)
# http://thawra.alwehda.gov.sy/_View_news2.asp?FileName=94459258720090318012209
# (Arabic, gov-site)
#
# We have not found any sources saying anything about when DST ends this year.
#
# Our summary
# https://www.timeanddate.com/news/time/syria-dst-starts-march-27-2009.html

# From Steffen Thorsen (2009-10-27):
# The Syrian Arab News Network on 2009-09-29 reported that Syria will
# revert back to winter (standard) time on midnight between Thursday
# 2009-10-29 and Friday 2009-10-30:
# http://www.sana.sy/ara/2/2009/09/29/247012.htm (Arabic)

# From Arthur David Olson (2009-10-28):
# We'll see if future DST switching times turn out to be end of the last
# Thursday of the month or the start of the last Friday of the month or
# something else. For now, use the start of the last Friday.

# From Steffen Thorsen (2010-03-17):
# The "Syrian News Station" reported on 2010-03-16 that the Council of
# Ministers has decided that Syria will start DST on midnight Thursday
# 2010-04-01: (midnight between Thursday and Friday):
# http://sns.sy/sns/?path=news/read/11421 (Arabic)

# From Steffen Thorsen (2012-03-26):
# Today, Syria's government announced that they will start DST early on Friday
# (00:00). This is a bit earlier than the past two years.
#
# From Syrian Arab News Agency, in Arabic:
# http://www.sana.sy/ara/2/2012/03/26/408215.htm
#
# Our brief summary:
# https://www.timeanddate.com/news/time/syria-dst-2012.html

# From Steffen Thorsen (2022-10-05):
# Syria is adopting year-round DST, starting this autumn....
# From https://www.enabbaladi.net/archives/607812
# "This [the decision] came after the weekly government meeting today,
# Tuesday 4 October ..."
#
# From Paul Eggert (2022-10-05):
# Like Jordan, model this as a transition from EEST +03 (DST) to plain +03
# (non-DST) at the point where DST would otherwise have ended.

Rule	Syria	2008	only	-	Apr	Fri>=1	0:00	1:00	S
Rule	Syria	2008	only	-	Nov	1	0:00	0	-
Rule	Syria	2009	only	-	Mar	lastFri	0:00	1:00	S
Rule	Syria	2010	2011	-	Apr	Fri>=1	0:00	1:00	S
Rule	Syria	2012	2022	-	Mar	lastFri	0:00	1:00	S
Rule	Syria	2009	2022	-	Oct	lastFri	0:00	0	-

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Damascus	2:25:12 -	LMT	1920 # Dimashq
			2:00	Syria	EE%sT	2022 Oct 28 0:00
			3:00	-	%z

# Tajikistan
# From Shanks & Pottenger.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Dushanbe	4:35:12 -	LMT	1924 May  2
			5:00	-	%z	1930 Jun 21
			6:00 RussiaAsia %z	1991 Mar 31  2:00s
			5:00	1:00	%z	1991 Sep  9  2:00s
			5:00	-	%z

# Cambodia
# Christmas I
# Laos
# Thailand
# Vietnam (northern)
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Bangkok	6:42:04	-	LMT	1880
			6:42:04	-	BMT	1920 Apr # Bangkok Mean Time
			7:00	-	%z

# Turkmenistan
# From Shanks & Pottenger.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Ashgabat	3:53:32 -	LMT	1924 May  2 # or Ashkhabad
			4:00	-	%z	1930 Jun 21
			5:00 RussiaAsia	%z	1991 Mar 31  2:00
			4:00 RussiaAsia	%z	1992 Jan 19  2:00
			5:00	-	%z

# Oman
# Réunion
# Seychelles
# United Arab Emirates
#
# The Crozet Is also observe Réunion time; see the 'antarctica' file.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Dubai	3:41:12 -	LMT	1920
			4:00	-	%z

# Uzbekistan
# Byalokoz 1919 says Uzbekistan was 4:27:53.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Asia/Samarkand	4:27:53 -	LMT	1924 May  2
			4:00	-	%z	1930 Jun 21
			5:00	-	%z	1981 Apr  1
			5:00	1:00	%z	1981 Oct  1
			6:00	-	%z	1982 Apr  1
			5:00 RussiaAsia	%z	1992
			5:00	-	%z
# Milne says Tashkent was 4:37:10.8.
		#STDOFF	4:37:10.8
Zone	Asia/Tashkent	4:37:11 -	LMT	1924 May  2
			5:00	-	%z	1930 Jun 21
			6:00 RussiaAsia	%z	1991 Mar 31  2:00
			5:00 RussiaAsia	%z	1992
			5:00	-	%z

# Vietnam (southern)

# From Paul Eggert (2014-10-04):
# Milne gives 7:16:56 for the meridian of Saigon in 1899, as being
# used in Lower Laos, Cambodia, and Annam.  But this is quite a ways
# from Saigon's location.  For now, ignore this and stick with Shanks
# and Pottenger for LMT before 1906.

# From Arthur David Olson (2008-03-18):
# The English-language name of Vietnam's most populous city is "Ho Chi Minh
# City"; use Ho_Chi_Minh below to avoid a name of more than 14 characters.

# From Paul Eggert (2024-01-14) after a 2014 heads-up from Trần Ngọc Quân
# and a 2024-01-14 heads-up from Đoàn Trần Công Danh:
# Trần Tiến Bình's authoritative book "Lịch Việt Nam: thế kỷ XX-XXI (1901-2100)"
# (Nhà xuất bản Văn Hoá - Thông Tin, Hanoi, 2005), pp 49-50,
# is quoted verbatim in:
# http://www.thoigian.com.vn/?mPage=P80D01
# is translated by Brian Inglis in:
# https://mm.icann.org/pipermail/tz/2014-October/021654.html
# and is the basis for the information below.
#
# The 1906 transition was effective July 1 and standardized Indochina to
# Phù Liễn Observatory, legally 104° 17' 17" east of Paris.
# It's unclear whether this meant legal Paris Mean Time (00:09:21) or
# the Paris Meridian; for now guess the former and round the exact
# 07:06:30.1333... to 07:06:30.13 as the legal spec used 66 2/3 ms precision.
# which is used below even though the modern-day Phù Liễn Observatory
# is closer to 07:06:31.  Abbreviate Phù Liễn Mean Time as PLMT.
#
# The following transitions occurred in Indochina in general (before 1954)
# and in South Vietnam in particular (after 1954):
# To 07:00 on 1911-05-01.
# To 08:00 on 1942-12-31 at 23:00.
# To 09:00 on 1945-03-14 at 23:00.
# To 07:00 on 1945-09-02 in Vietnam.
# To 08:00 on 1947-04-01 in French-controlled Indochina.
# To 07:00 on 1955-07-01 in South Vietnam.
# To 08:00 on 1959-12-31 at 23:00 in South Vietnam.
# To 07:00 on 1975-06-13 in South Vietnam.
#
# Trần cites the following sources; it's unclear which supplied the info above.
#
#   Hoàng Xuân Hãn: "Lịch và lịch Việt Nam". Tập san Khoa học Xã hội,
#   No. 9, Paris, February 1982.
#
#   Lê Thành Lân: "Lịch và niên biểu lịch sử hai mươi thế kỷ (0001-2010)",
#   NXB Thống kê, Hanoi, 2000.
#
#   Lê Thành Lân: "Lịch hai thế kỷ (1802-2010) và các lịch vĩnh cửu",
#   NXB Thuận Hoá, Huế, 1995.
#
# Here is the decision for the September 1945 transition:
# Võ Nguyên Giáp, Việt Nam Dân Quốc Công Báo, No. 1 (1945-09-29), page 13
# http://baochi.nlv.gov.vn/baochi/cgi-bin/baochi?a=d&d=JwvzO19450929.2.5&dliv=none
# It says that on 1945-09-01 at 24:00, Vietnam moved back two hours, to +07.
# It also mentions a 1945-03-29 decree (by a Japanese Governor-General)
# to set the time zone to +09, but does not say whether that decree
# merely legalized an earlier change to +09.
#
# July 1955 transition:
# Ngô Đình Diệm, Công Báo Việt Nam, No. 92 (1955-07-02), page 1780-1781
# Ordinance (Dụ) No. 46 (1955-06-25)
# http://ddsnext.crl.edu/titles/32341#?c=0&m=29&s=0&cv=4&r=0&xywh=-89%2C342%2C1724%2C1216
# It says that on 1955-07-01 at 01:00, South Vietnam moved back 1 hour (to +07).
#
# December 1959 transition:
# Ngô Đình Diệm, Công Báo Việt Nam Cộng Hòa, 1960 part 1 (1960-01-02), page 62
# Decree (Sắc lệnh) No. 362-TTP (1959-12-30)
# http://ddsnext.crl.edu/titles/32341#?c=0&m=138&s=0&cv=793&r=0&xywh=-54%2C1504%2C1705%2C1202
# It says that on 1959-12-31 at 23:00, South Vietnam moved forward 1 hour (to +08).


# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
		#STDOFF	7:06:30.13
Zone Asia/Ho_Chi_Minh	7:06:30 -	LMT	1906 Jul  1
			7:06:30	-	PLMT	1911 May  1 # Phù Liễn MT
			7:00	-	%z	1942 Dec 31 23:00
			8:00	-	%z	1945 Mar 14 23:00
			9:00	-	%z	1945 Sep  1 24:00
			7:00	-	%z	1947 Apr  1
			8:00	-	%z	1955 Jul  1 01:00
			7:00	-	%z	1959 Dec 31 23:00
			8:00	-	%z	1975 Jun 13
			7:00	-	%z

# From Paul Eggert (2019-02-19):
#
# The Ho Chi Minh entry suffices for most purposes as it agrees with all of
# Vietnam since 1975-06-13.  Presumably clocks often changed in south Vietnam
# in the early 1970s as locations changed hands during the war; however the
# details are unknown and would likely be too voluminous for this database.
#
# For timestamps in north Vietnam back to 1970 (the tzdb cutoff),
# use Asia/Bangkok; see the VN entries in the file zone1970.tab.
# For timestamps before 1970, see Asia/Hanoi in the file 'backzone'.
# tzdb data for Australasia and environs, and for much of the Pacific

# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.

# This file also includes Pacific islands.

# Notes are at the end of this file

###############################################################################

# Australia

# Please see the notes below for the controversy about "EST" versus "AEST" etc.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Aus	1917	only	-	Jan	 1	2:00s	1:00	D
Rule	Aus	1917	only	-	Mar	lastSun	2:00s	0	S
Rule	Aus	1942	only	-	Jan	 1	2:00s	1:00	D
Rule	Aus	1942	only	-	Mar	lastSun	2:00s	0	S
Rule	Aus	1942	only	-	Sep	27	2:00s	1:00	D
Rule	Aus	1943	1944	-	Mar	lastSun	2:00s	0	S
Rule	Aus	1943	only	-	Oct	 3	2:00s	1:00	D

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
# Northern Territory
Zone Australia/Darwin	 8:43:20 -	LMT	1895 Feb
			 9:00	-	ACST	1899 May
			 9:30	Aus	AC%sT
# Western Australia
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	AW	1974	only	-	Oct	lastSun	2:00s	1:00	D
Rule	AW	1975	only	-	Mar	Sun>=1	2:00s	0	S
Rule	AW	1983	only	-	Oct	lastSun	2:00s	1:00	D
Rule	AW	1984	only	-	Mar	Sun>=1	2:00s	0	S
Rule	AW	1991	only	-	Nov	17	2:00s	1:00	D
Rule	AW	1992	only	-	Mar	Sun>=1	2:00s	0	S
Rule	AW	2006	only	-	Dec	 3	2:00s	1:00	D
Rule	AW	2007	2009	-	Mar	lastSun	2:00s	0	S
Rule	AW	2007	2008	-	Oct	lastSun	2:00s	1:00	D
Zone Australia/Perth	 7:43:24 -	LMT	1895 Dec
			 8:00	Aus	AW%sT	1943 Jul
			 8:00	AW	AW%sT
Zone Australia/Eucla	 8:35:28 -	LMT	1895 Dec
			 8:45	Aus	%z	1943 Jul
			 8:45	AW	%z

# Queensland
#
# From Alex Livingston (1996-11-01):
# I have heard or read more than once that some resort islands off the coast
# of Queensland chose to keep observing daylight-saving time even after
# Queensland ceased to.
#
# From Paul Eggert (1996-11-22):
# IATA SSIM (1993-02/1994-09) say that the Holiday Islands (Hayman, Lindeman,
# Hamilton) observed DST for two years after the rest of Queensland stopped.
# Hamilton is the largest, but there is also a Hamilton in Victoria,
# so use Lindeman.
#
# From J William Piggott (2016-02-20):
# There is no location named Holiday Islands in Queensland Australia; holiday
# islands is a colloquial term used globally.  Hayman and Lindeman are at the
# north and south extremes of the Whitsunday Islands archipelago, and
# Hamilton is in between; it is reasonable to believe that this time zone
# applies to all of the Whitsundays.
# http://www.australia.gov.au/about-australia/australian-story/austn-islands
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	AQ	1971	only	-	Oct	lastSun	2:00s	1:00	D
Rule	AQ	1972	only	-	Feb	lastSun	2:00s	0	S
Rule	AQ	1989	1991	-	Oct	lastSun	2:00s	1:00	D
Rule	AQ	1990	1992	-	Mar	Sun>=1	2:00s	0	S
Rule	Holiday	1992	1993	-	Oct	lastSun	2:00s	1:00	D
Rule	Holiday	1993	1994	-	Mar	Sun>=1	2:00s	0	S
Zone Australia/Brisbane	10:12:08 -	LMT	1895
			10:00	Aus	AE%sT	1971
			10:00	AQ	AE%sT
Zone Australia/Lindeman  9:55:56 -	LMT	1895
			10:00	Aus	AE%sT	1971
			10:00	AQ	AE%sT	1992 Jul
			10:00	Holiday	AE%sT

# South Australia
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	AS	1971	1985	-	Oct	lastSun	2:00s	1:00	D
Rule	AS	1986	only	-	Oct	19	2:00s	1:00	D
Rule	AS	1987	2007	-	Oct	lastSun	2:00s	1:00	D
Rule	AS	1972	only	-	Feb	27	2:00s	0	S
Rule	AS	1973	1985	-	Mar	Sun>=1	2:00s	0	S
Rule	AS	1986	1990	-	Mar	Sun>=15	2:00s	0	S
Rule	AS	1991	only	-	Mar	3	2:00s	0	S
Rule	AS	1992	only	-	Mar	22	2:00s	0	S
Rule	AS	1993	only	-	Mar	7	2:00s	0	S
Rule	AS	1994	only	-	Mar	20	2:00s	0	S
Rule	AS	1995	2005	-	Mar	lastSun	2:00s	0	S
Rule	AS	2006	only	-	Apr	2	2:00s	0	S
Rule	AS	2007	only	-	Mar	lastSun	2:00s	0	S
Rule	AS	2008	max	-	Apr	Sun>=1	2:00s	0	S
Rule	AS	2008	max	-	Oct	Sun>=1	2:00s	1:00	D
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Australia/Adelaide	9:14:20 -	LMT	1895 Feb
			9:00	-	ACST	1899 May
			9:30	Aus	AC%sT	1971
			9:30	AS	AC%sT

# Tasmania
#
# From Paul Eggert (2005-08-16):
# http://www.bom.gov.au/climate/averages/tables/dst_times.shtml
# says King Island didn't observe DST from WWII until late 1971.
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	AT	1916	only	-	Oct	Sun>=1	2:00s	1:00	D
Rule	AT	1917	only	-	Mar	lastSun	2:00s	0	S
Rule	AT	1917	1918	-	Oct	Sun>=22	2:00s	1:00	D
Rule	AT	1918	1919	-	Mar	Sun>=1	2:00s	0	S
Rule	AT	1967	only	-	Oct	Sun>=1	2:00s	1:00	D
Rule	AT	1968	only	-	Mar	Sun>=29	2:00s	0	S
Rule	AT	1968	1985	-	Oct	lastSun	2:00s	1:00	D
Rule	AT	1969	1971	-	Mar	Sun>=8	2:00s	0	S
Rule	AT	1972	only	-	Feb	lastSun	2:00s	0	S
Rule	AT	1973	1981	-	Mar	Sun>=1	2:00s	0	S
Rule	AT	1982	1983	-	Mar	lastSun	2:00s	0	S
Rule	AT	1984	1986	-	Mar	Sun>=1	2:00s	0	S
Rule	AT	1986	only	-	Oct	Sun>=15	2:00s	1:00	D
Rule	AT	1987	1990	-	Mar	Sun>=15	2:00s	0	S
Rule	AT	1987	only	-	Oct	Sun>=22	2:00s	1:00	D
Rule	AT	1988	1990	-	Oct	lastSun	2:00s	1:00	D
Rule	AT	1991	1999	-	Oct	Sun>=1	2:00s	1:00	D
Rule	AT	1991	2005	-	Mar	lastSun	2:00s	0	S
Rule	AT	2000	only	-	Aug	lastSun	2:00s	1:00	D
Rule	AT	2001	max	-	Oct	Sun>=1	2:00s	1:00	D
Rule	AT	2006	only	-	Apr	Sun>=1	2:00s	0	S
Rule	AT	2007	only	-	Mar	lastSun	2:00s	0	S
Rule	AT	2008	max	-	Apr	Sun>=1	2:00s	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Australia/Hobart	9:49:16	-	LMT	1895 Sep
			10:00	AT	AE%sT	1919 Oct 24
			10:00	Aus	AE%sT	1967
			10:00	AT	AE%sT

# Victoria
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	AV	1971	1985	-	Oct	lastSun	2:00s	1:00	D
Rule	AV	1972	only	-	Feb	lastSun	2:00s	0	S
Rule	AV	1973	1985	-	Mar	Sun>=1	2:00s	0	S
Rule	AV	1986	1990	-	Mar	Sun>=15	2:00s	0	S
Rule	AV	1986	1987	-	Oct	Sun>=15	2:00s	1:00	D
Rule	AV	1988	1999	-	Oct	lastSun	2:00s	1:00	D
Rule	AV	1991	1994	-	Mar	Sun>=1	2:00s	0	S
Rule	AV	1995	2005	-	Mar	lastSun	2:00s	0	S
Rule	AV	2000	only	-	Aug	lastSun	2:00s	1:00	D
Rule	AV	2001	2007	-	Oct	lastSun	2:00s	1:00	D
Rule	AV	2006	only	-	Apr	Sun>=1	2:00s	0	S
Rule	AV	2007	only	-	Mar	lastSun	2:00s	0	S
Rule	AV	2008	max	-	Apr	Sun>=1	2:00s	0	S
Rule	AV	2008	max	-	Oct	Sun>=1	2:00s	1:00	D
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Australia/Melbourne 9:39:52 -	LMT	1895 Feb
			10:00	Aus	AE%sT	1971
			10:00	AV	AE%sT

# New South Wales
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	AN	1971	1985	-	Oct	lastSun	2:00s	1:00	D
Rule	AN	1972	only	-	Feb	27	2:00s	0	S
Rule	AN	1973	1981	-	Mar	Sun>=1	2:00s	0	S
Rule	AN	1982	only	-	Apr	Sun>=1	2:00s	0	S
Rule	AN	1983	1985	-	Mar	Sun>=1	2:00s	0	S
Rule	AN	1986	1989	-	Mar	Sun>=15	2:00s	0	S
Rule	AN	1986	only	-	Oct	19	2:00s	1:00	D
Rule	AN	1987	1999	-	Oct	lastSun	2:00s	1:00	D
Rule	AN	1990	1995	-	Mar	Sun>=1	2:00s	0	S
Rule	AN	1996	2005	-	Mar	lastSun	2:00s	0	S
Rule	AN	2000	only	-	Aug	lastSun	2:00s	1:00	D
Rule	AN	2001	2007	-	Oct	lastSun	2:00s	1:00	D
Rule	AN	2006	only	-	Apr	Sun>=1	2:00s	0	S
Rule	AN	2007	only	-	Mar	lastSun	2:00s	0	S
Rule	AN	2008	max	-	Apr	Sun>=1	2:00s	0	S
Rule	AN	2008	max	-	Oct	Sun>=1	2:00s	1:00	D
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Australia/Sydney	10:04:52 -	LMT	1895 Feb
			10:00	Aus	AE%sT	1971
			10:00	AN	AE%sT
Zone Australia/Broken_Hill 9:25:48 -	LMT	1895 Feb
			10:00	-	AEST	1896 Aug 23
			9:00	-	ACST	1899 May
			9:30	Aus	AC%sT	1971
			9:30	AN	AC%sT	2000
			9:30	AS	AC%sT

# Lord Howe Island
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	LH	1981	1984	-	Oct	lastSun	2:00	1:00	-
Rule	LH	1982	1985	-	Mar	Sun>=1	2:00	0	-
Rule	LH	1985	only	-	Oct	lastSun	2:00	0:30	-
Rule	LH	1986	1989	-	Mar	Sun>=15	2:00	0	-
Rule	LH	1986	only	-	Oct	19	2:00	0:30	-
Rule	LH	1987	1999	-	Oct	lastSun	2:00	0:30	-
Rule	LH	1990	1995	-	Mar	Sun>=1	2:00	0	-
Rule	LH	1996	2005	-	Mar	lastSun	2:00	0	-
Rule	LH	2000	only	-	Aug	lastSun	2:00	0:30	-
Rule	LH	2001	2007	-	Oct	lastSun	2:00	0:30	-
Rule	LH	2006	only	-	Apr	Sun>=1	2:00	0	-
Rule	LH	2007	only	-	Mar	lastSun	2:00	0	-
Rule	LH	2008	max	-	Apr	Sun>=1	2:00	0	-
Rule	LH	2008	max	-	Oct	Sun>=1	2:00	0:30	-
Zone Australia/Lord_Howe 10:36:20 -	LMT	1895 Feb
			10:00	-	AEST	1981 Mar
			10:30	LH	%z	1985 Jul
			10:30	LH	%z

# Australian miscellany
#
# Ashmore Is, Cartier
# no indigenous inhabitants; only seasonal caretakers
# no times are set
#
# Coral Sea Is
# no indigenous inhabitants; only meteorologists
# no times are set
#
# Macquarie
# Permanent occupation (scientific station) 1911-1915 and since 25 March 1948;
# sealing and penguin oil station operated Nov 1899 to Apr 1919.  See the
# Tasmania Parks & Wildlife Service history of sealing at Macquarie Island
# http://www.parks.tas.gov.au/index.aspx?base=1828
# http://www.parks.tas.gov.au/index.aspx?base=1831
# Guess that it was like Australia/Hobart while inhabited before 2010.
#
# From Steffen Thorsen (2010-03-10):
# We got these changes from the Australian Antarctic Division:
# - Macquarie Island will stay on UTC+11 for winter and therefore not
# switch back from daylight savings time when other parts of Australia do
# on 4 April.
#
# From Arthur David Olson (2013-05-23):
# The 1919 transition is overspecified below so pre-2013 zics
# will produce a binary file with an [A]EST-type as the first 32-bit type;
# this is required for correct handling of times before 1916 by
# pre-2013 versions of localtime.
Zone Antarctica/Macquarie 0	-	-00	1899 Nov
			10:00	-	AEST	1916 Oct  1  2:00
			10:00	1:00	AEDT	1917 Feb
			10:00	Aus	AE%sT	1919 Apr  1  0:00s
			0	-	-00	1948 Mar 25
			10:00	Aus	AE%sT	1967
			10:00	AT	AE%sT	2010
			10:00	1:00	AEDT	2011
			10:00	AT	AE%sT

# Fiji

# Milne gives 11:55:44 for Suva.

# From Alexander Krivenyshev (2009-11-10):
# According to Fiji Broadcasting Corporation,  Fiji plans to re-introduce DST
# from November 29th 2009  to April 25th 2010.
#
# "Daylight savings to commence this month"
# http://www.radiofiji.com.fj/fullstory.php?id=23719
# http://www.worldtimezone.com/dst_news/dst_news_fiji01.html

# From Steffen Thorsen (2009-11-10):
# The Fiji Government has posted some more details about the approved
# amendments:
# http://www.fiji.gov.fj/publish/page_16198.shtml

# From Steffen Thorsen (2010-03-03):
# The Cabinet in Fiji has decided to end DST about a month early, on
# 2010-03-28 at 03:00.
# The plan is to observe DST again, from 2010-10-24 to sometime in March
# 2011 (last Sunday a good guess?).
#
# Official source:
# http://www.fiji.gov.fj/index.php?option=com_content&view=article&id=1096:3310-cabinet-approves-change-in-daylight-savings-dates&catid=49:cabinet-releases&Itemid=166
#
# A bit more background info here:
# https://www.timeanddate.com/news/time/fiji-dst-ends-march-2010.html

# From Alexander Krivenyshev (2010-10-24):
# According to Radio Fiji and Fiji Times online, Fiji will end DST 3
# weeks earlier than expected - on March 6, 2011, not March 27, 2011...
# Here is confirmation from Government of the Republic of the Fiji Islands,
# Ministry of Information (fiji.gov.fj) web site:
# http://www.fiji.gov.fj/index.php?option=com_content&view=article&id=2608:daylight-savings&catid=71:press-releases&Itemid=155
# http://www.worldtimezone.com/dst_news/dst_news_fiji04.html

# From Steffen Thorsen (2011-10-03):
# Now the dates have been confirmed, and at least our start date
# assumption was correct (end date was one week wrong).
#
# http://www.fiji.gov.fj/index.php?option=com_content&view=article&id=4966:daylight-saving-starts-in-fiji&catid=71:press-releases&Itemid=155
# which says
# Members of the public are reminded to change their time to one hour in
# advance at 2am to 3am on October 23, 2011 and one hour back at 3am to
# 2am on February 26 next year.

# From Ken Rylander (2011-10-24)
# Another change to the Fiji DST end date. In the TZ database the end date for
# Fiji DST 2012, is currently Feb 26. This has been changed to Jan 22.
#
# http://www.fiji.gov.fj/index.php?option=com_content&view=article&id=5017:amendments-to-daylight-savings&catid=71:press-releases&Itemid=155
# states:
#
# The end of daylight saving scheduled initially for the 26th of February 2012
# has been brought forward to the 22nd of January 2012.
# The commencement of daylight saving will remain unchanged and start
# on the  23rd of October, 2011.

# From the Fiji Government Online Portal (2012-08-21) via Steffen Thorsen:
# The Minister for Labour, Industrial Relations and Employment Mr Jone Usamate
# today confirmed that Fiji will start daylight savings at 2 am on Sunday 21st
# October 2012 and end at 3 am on Sunday 20th January 2013.
# http://www.fiji.gov.fj/index.php?option=com_content&view=article&id=6702&catid=71&Itemid=155

# From the Fijian Government Media Center (2013-08-30) via David Wheeler:
# Fiji will start daylight savings on Sunday 27th October, 2013 ...
# move clocks forward by one hour from 2am
# http://www.fiji.gov.fj/Media-Center/Press-Releases/DAYLIGHT-SAVING-STARTS-ON-SUNDAY,-27th-OCTOBER-201.aspx

# From Steffen Thorsen (2013-01-10):
# Fiji will end DST on 2014-01-19 02:00:
# http://www.fiji.gov.fj/Media-Center/Press-Releases/DAYLIGHT-SAVINGS-TO-END-THIS-MONTH-(1).aspx

# From Ken Rylander (2014-10-20):
# DST will start Nov. 2 this year.
# http://www.fiji.gov.fj/Media-Center/Press-Releases/DAYLIGHT-SAVING-STARTS-ON-SUNDAY,-NOVEMBER-2ND.aspx

# From a government order dated 2015-08-26 and published as Legal Notice No. 77
# in the Government of Fiji Gazette Supplement No. 24 (2015-08-28),
# via Ken Rylander (2015-09-02):
# the daylight saving period is 1 hour in advance of the standard time
# commencing at 2.00 am on Sunday 1st November, 2015 and ending at
# 3.00 am on Sunday 17th January, 2016.

# From Raymond Kumar (2016-10-04):
# http://www.fiji.gov.fj/Media-Center/Press-Releases/DAYLIGHT-SAVING-STARTS-ON-6th-NOVEMBER,-2016.aspx
# "Fiji's daylight savings will begin on Sunday, 6 November 2016, when
# clocks go forward an hour at 2am to 3am....  Daylight Saving will
# end at 3.00am on Sunday 15th January 2017."

# From Paul Eggert (2017-08-21):
# Dominic Fok writes (2017-08-20) that DST ends 2018-01-14, citing
# Extraordinary Government of Fiji Gazette Supplement No. 21 (2017-08-27),
# [Legal Notice No. 41] of an order of the previous day by J Usamate.

# From Raymond Kumar (2018-07-13):
# http://www.fijitimes.com/government-approves-2018-daylight-saving/
# ... The daylight saving period will end at 3am on Sunday January 13, 2019.

# From Paul Eggert (2019-08-06):
# Today Raymond Kumar reported the Government of Fiji Gazette Supplement No. 27
# (2019-08-02) said that Fiji observes DST "commencing at 2.00 am on
# Sunday, 10 November 2019 and ending at 3.00 am on Sunday, 12 January 2020."
# For now, guess DST from 02:00 the second Sunday in November to 03:00
# the first Sunday on or after January 12.  January transitions reportedly
# depend on when school terms start.  Although the guess is ad hoc, it matches
# transitions planned this year and seems more likely to match future practice
# than guessing no DST.
# From Michael Deckers (2019-08-06):
# https://www.laws.gov.fj/LawsAsMade/downloadfile/848

# From Raymond Kumar (2020-10-08):
# [DST in Fiji] is from December 20th 2020, till 17th January 2021.
# From Alan Mintz (2020-10-08):
# https://www.laws.gov.fj/LawsAsMade/GetFile/1071
# From Tim Parenti (2020-10-08):
# https://www.fijivillage.com/news/Daylight-saving-from-Dec-20th-this-year-to-Jan-17th-2021-8rf4x5/
# "Minister for Employment, Parveen Bala says they had never thought of
# stopping daylight saving. He says it was just to decide on when it should
# start and end.  Bala says it is a short period..."
#
# From Tim Parenti (2021-10-11), per Jashneel Kumar (2021-10-11) and P Chan
# (2021-10-12):
# https://www.fiji.gov.fj/Media-Centre/Speeches/English/PM-BAINIMARAMA-S-COVID-19-ANNOUNCEMENT-10-10-21
# https://www.fbcnews.com.fj/news/covid-19/curfew-moved-back-to-11pm/
# In a 2021-10-10 speech concerning updated Covid-19 mitigation measures in
# Fiji, prime minister Josaia Voreqe "Frank" Bainimarama announced the
# suspension of DST for the 2021/2022 season: "Given that we are in the process
# of readjusting in the midst of so many changes, we will also put Daylight
# Savings Time on hold for this year. It will also make the reopening of
# scheduled commercial air service much smoother if we don't have to be
# concerned shifting arrival and departure times, which may look like a simple
# thing but requires some significant logistical adjustments domestically and
# internationally."

# From Shalvin Narayan (2022-10-27):
# Please note that there will not be any daylight savings time change
# in Fiji for 2022-2023....
# https://www.facebook.com/FijianGovernment/posts/pfbid0mmWVTYmTibn66ybpFda75pDcf34SSpoSaskJW5gXwaKo5Sgc7273Q4fXWc6kQV6Hl

# From Almaz Mingaleev (2023-10-06):
# Cabinet approved the suspension of Daylight Saving and appropriate
# legislative changes will be considered including the repeal of the
# Daylight Saving Act 1998
# https://www.fiji.gov.fj/Media-Centre/Speeches/English/CABINET-DECISIONS-3-OCTOBER-2023
#
# From Paul Eggert (2023-10-06):
# For now, assume DST is suspended indefinitely.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Fiji	1998	1999	-	Nov	Sun>=1	2:00	1:00	-
Rule	Fiji	1999	2000	-	Feb	lastSun	3:00	0	-
Rule	Fiji	2009	only	-	Nov	29	2:00	1:00	-
Rule	Fiji	2010	only	-	Mar	lastSun	3:00	0	-
Rule	Fiji	2010	2013	-	Oct	Sun>=21	2:00	1:00	-
Rule	Fiji	2011	only	-	Mar	Sun>=1	3:00	0	-
Rule	Fiji	2012	2013	-	Jan	Sun>=18	3:00	0	-
Rule	Fiji	2014	only	-	Jan	Sun>=18	2:00	0	-
Rule	Fiji	2014	2018	-	Nov	Sun>=1	2:00	1:00	-
Rule	Fiji	2015	2021	-	Jan	Sun>=12	3:00	0	-
Rule	Fiji	2019	only	-	Nov	Sun>=8	2:00	1:00	-
Rule	Fiji	2020	only	-	Dec	20	2:00	1:00	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Pacific/Fiji	11:55:44 -	LMT	1915 Oct 26 # Suva
			12:00	Fiji	%z

# French Polynesia
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Pacific/Gambier	 -8:59:48 -	LMT	1912 Oct  1 # Rikitea
			 -9:00	-	%z
Zone	Pacific/Marquesas -9:18:00 -	LMT	1912 Oct  1
			 -9:30	-	%z
Zone	Pacific/Tahiti	 -9:58:16 -	LMT	1912 Oct  1 # Papeete
			-10:00	-	%z
# Clipperton (near North America) is administered from French Polynesia;
# it is uninhabited.


# Guam
# N Mariana Is

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
# http://guamlegislature.com/Public_Laws_5th/PL05-025.pdf
# http://documents.guam.gov/wp-content/uploads/E.O.-59-7-Guam-Daylight-Savings-Time-May-6-1959.pdf
Rule	Guam	1959	only	-	Jun	27	2:00	1:00	D
# http://documents.guam.gov/wp-content/uploads/E.O.-61-5-Revocation-of-Daylight-Saving-Time-and-Restoratio.pdf
Rule	Guam	1961	only	-	Jan	29	2:00	0	S
# http://documents.guam.gov/wp-content/uploads/E.O.-67-13-Guam-Daylight-Savings-Time.pdf
Rule	Guam	1967	only	-	Sep	 1	2:00	1:00	D
# http://documents.guam.gov/wp-content/uploads/E.O.-69-2-Repeal-of-Guam-Daylight-Saving-Time.pdf
Rule	Guam	1969	only	-	Jan	26	0:01	0	S
# http://documents.guam.gov/wp-content/uploads/E.O.-69-10-Guam-Daylight-Saving-Time.pdf
Rule	Guam	1969	only	-	Jun	22	2:00	1:00	D
Rule	Guam	1969	only	-	Aug	31	2:00	0	S
# http://documents.guam.gov/wp-content/uploads/E.O.-70-10-Guam-Daylight-Saving-Time.pdf
# http://documents.guam.gov/wp-content/uploads/E.O.-70-30-End-of-Guam-Daylight-Saving-Time.pdf
# http://documents.guam.gov/wp-content/uploads/E.O.-71-5-Guam-Daylight-Savings-Time.pdf
Rule	Guam	1970	1971	-	Apr	lastSun	2:00	1:00	D
Rule	Guam	1970	1971	-	Sep	Sun>=1	2:00	0	S
# http://documents.guam.gov/wp-content/uploads/E.O.-73-28.-Guam-Day-light-Saving-Time.pdf
Rule	Guam	1973	only	-	Dec	16	2:00	1:00	D
# http://documents.guam.gov/wp-content/uploads/E.O.-74-7-Guam-Daylight-Savings-Time-Rescinded.pdf
Rule	Guam	1974	only	-	Feb	24	2:00	0	S
# http://documents.guam.gov/wp-content/uploads/E.O.-76-13-Daylight-Savings-Time.pdf
Rule	Guam	1976	only	-	May	26	2:00	1:00	D
# http://documents.guam.gov/wp-content/uploads/E.O.-76-25-Revocation-of-E.O.-76-13.pdf
Rule	Guam	1976	only	-	Aug	22	2:01	0	S
# http://documents.guam.gov/wp-content/uploads/E.O.-77-4-Daylight-Savings-Time.pdf
Rule	Guam	1977	only	-	Apr	24	2:00	1:00	D
# http://documents.guam.gov/wp-content/uploads/E.O.-77-18-Guam-Standard-Time.pdf
Rule	Guam	1977	only	-	Aug	28	2:00	0	S

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Pacific/Guam	-14:21:00 -	LMT	1844 Dec 31
			 9:39:00 -	LMT	1901        # Agana
			10:00	-	GST	1941 Dec 10 # Guam
			 9:00	-	%z	1944 Jul 31
			10:00	Guam	G%sT	2000 Dec 23
			10:00	-	ChST	# Chamorro Standard Time


# Kiribati (Gilbert Is)
# Marshall Is
# Tuvalu
# Wake
# Wallis & Futuna
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Pacific/Tarawa	 11:32:04 -	LMT	1901 # Bairiki
			 12:00	-	%z

# Kiribati (except Gilbert Is)
# See Pacific/Tarawa for the Gilbert Is.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Pacific/Kanton	  0	-	-00	1937 Aug 31
			-12:00	-	%z	1979 Oct
			-11:00	-	%z	1994 Dec 31
			 13:00	-	%z
Zone Pacific/Kiritimati	-10:29:20 -	LMT	1901
			-10:40	-	%z	1979 Oct
			-10:00	-	%z	1994 Dec 31
			 14:00	-	%z

# Marshall Is
# See Pacific/Tarawa for most locations.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Pacific/Kwajalein	 11:09:20 -	LMT	1901
			 11:00	-	%z	1937
			 10:00	-	%z	1941 Apr  1
			  9:00	-	%z	1944 Feb  6
			 11:00	-	%z	1969 Oct
			-12:00	-	%z	1993 Aug 20 24:00
			 12:00	-	%z

# Micronesia
# For Chuuk and Yap see Pacific/Port_Moresby.
# For Pohnpei see Pacific/Guadalcanal.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Pacific/Kosrae	-13:08:04 -	LMT	1844 Dec 31
			 10:51:56 -	LMT	1901
			 11:00	-	%z	1914 Oct
			  9:00	-	%z	1919 Feb  1
			 11:00	-	%z	1937
			 10:00	-	%z	1941 Apr  1
			  9:00	-	%z	1945 Aug
			 11:00	-	%z	1969 Oct
			 12:00	-	%z	1999
			 11:00	-	%z

# Nauru
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Pacific/Nauru	11:07:40 -	LMT	1921 Jan 15 # Uaobe
			11:30	-	%z	1942 Aug 29
			 9:00	-	%z	1945 Sep  8
			11:30	-	%z	1979 Feb 10  2:00
			12:00	-	%z

# New Caledonia
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	NC	1977	1978	-	Dec	Sun>=1	0:00	1:00	-
Rule	NC	1978	1979	-	Feb	27	0:00	0	-
Rule	NC	1996	only	-	Dec	 1	2:00s	1:00	-
# Shanks & Pottenger say the following was at 2:00; go with IATA.
Rule	NC	1997	only	-	Mar	 2	2:00s	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Pacific/Noumea	11:05:48 -	LMT	1912 Jan 13 # Nouméa
			11:00	NC	%z


###############################################################################

# New Zealand
# McMurdo Station and Scott Base in Antarctica use Auckland time.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	NZ	1927	only	-	Nov	 6	2:00	1:00	S
Rule	NZ	1928	only	-	Mar	 4	2:00	0	M
Rule	NZ	1928	1933	-	Oct	Sun>=8	2:00	0:30	S
Rule	NZ	1929	1933	-	Mar	Sun>=15	2:00	0	M
Rule	NZ	1934	1940	-	Apr	lastSun	2:00	0	M
Rule	NZ	1934	1940	-	Sep	lastSun	2:00	0:30	S
Rule	NZ	1946	only	-	Jan	 1	0:00	0	S
# Since 1957 Chatham has been 45 minutes ahead of NZ, but until 2018a
# there was no documented single notation for the date and time of this
# transition.  Duplicate the Rule lines for now, to give the 2018a change
# time to percolate out.
Rule	NZ	1974	only	-	Nov	Sun>=1	2:00s	1:00	D
Rule	Chatham	1974	only	-	Nov	Sun>=1	2:45s	1:00	-
Rule	NZ	1975	only	-	Feb	lastSun	2:00s	0	S
Rule	Chatham	1975	only	-	Feb	lastSun	2:45s	0	-
Rule	NZ	1975	1988	-	Oct	lastSun	2:00s	1:00	D
Rule	Chatham	1975	1988	-	Oct	lastSun	2:45s	1:00	-
Rule	NZ	1976	1989	-	Mar	Sun>=1	2:00s	0	S
Rule	Chatham	1976	1989	-	Mar	Sun>=1	2:45s	0	-
Rule	NZ	1989	only	-	Oct	Sun>=8	2:00s	1:00	D
Rule	Chatham	1989	only	-	Oct	Sun>=8	2:45s	1:00	-
Rule	NZ	1990	2006	-	Oct	Sun>=1	2:00s	1:00	D
Rule	Chatham	1990	2006	-	Oct	Sun>=1	2:45s	1:00	-
Rule	NZ	1990	2007	-	Mar	Sun>=15	2:00s	0	S
Rule	Chatham	1990	2007	-	Mar	Sun>=15	2:45s	0	-
Rule	NZ	2007	max	-	Sep	lastSun	2:00s	1:00	D
Rule	Chatham	2007	max	-	Sep	lastSun	2:45s	1:00	-
Rule	NZ	2008	max	-	Apr	Sun>=1	2:00s	0	S
Rule	Chatham	2008	max	-	Apr	Sun>=1	2:45s	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Pacific/Auckland	11:39:04 -	LMT	1868 Nov  2
			11:30	NZ	NZ%sT	1946 Jan  1
			12:00	NZ	NZ%sT

Zone Pacific/Chatham	12:13:48 -	LMT	1868 Nov  2
			12:15	-	%z	1946 Jan  1
			12:45	Chatham	%z

# Auckland Is
# uninhabited; Māori and Moriori, colonial settlers, pastoralists, sealers,
# and scientific personnel have wintered

# Campbell I
# minor whaling stations operated 1909/1914
# scientific station operated 1941/1995;
# previously whalers, sealers, pastoralists, and scientific personnel wintered
# was probably like Pacific/Auckland

# Cook Is
#
# From Alexander Krivenyshev (2021-03-24):
# In 1899 the Cook Islands celebrated Christmas twice to correct the calendar.
# According to the old books, missionaries were unaware of
# the International Date line, when they came from Sydney.
# Thus the Cook Islands were one day ahead....
# http://nzetc.victoria.ac.nz/tm/scholarly/tei-KloDisc-t1-body-d18.html
# ... Appendix to the Journals of the House of Representatives, 1900
# https://atojs.natlib.govt.nz/cgi-bin/atojs?a=d&d=AJHR1900-I.2.1.2.3
# (page 20)
#
# From Michael Deckers (2021-03-24):
# ... in the Cook Island Act of 1915-10-11, online at
# http://www.paclii.org/ck/legis/ck-nz_act/cia1915132/
# "651. The hour of the day shall in each of the islands included in the
#  Cook Islands be determined in accordance with the meridian of that island."
# so that local (mean?) time was still used in Rarotonga (and Niue) in 1915.
# This was changed in the Cook Island Amendment Act of 1952-10-16 ...
# http://www.paclii.org/ck/legis/ck-nz_act/ciaa1952212/
# "651 (1) The hour of the day in each of the islands included in the Cook
#  Islands, other than Niue, shall be determined as if each island were
#  situated on the meridian one hundred and fifty-seven degrees thirty minutes
#  West of Greenwich.  (2) The hour of the day in the Island of Niue shall be
#  determined as if that island were situated on the meridian one hundred and
#  seventy degrees West of Greenwich."
# This act does not state when it takes effect, so one has to assume it
# applies since 1952-10-16.  But there is the possibility that the act just
# legalized prior existing practice, as we had seen with the Guernsey law of
# 1913-06-18 for the switch in 1909-04-19.
#
# From Paul Eggert (2021-03-24):
# Transitions after 1952 are from Shanks & Pottenger.
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Cook	1978	only	-	Nov	12	0:00	0:30	-
Rule	Cook	1979	1991	-	Mar	Sun>=1	0:00	0	-
Rule	Cook	1979	1990	-	Oct	lastSun	0:00	0:30	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Pacific/Rarotonga	13:20:56 -	LMT	1899 Dec 26 # Avarua
			-10:39:04 -	LMT	1952 Oct 16
			-10:30	-	%z	1978 Nov 12
			-10:00	Cook	%z

###############################################################################


# Niue
# See Pacific/Rarotonga comments for 1952 transition.
#
# From Tim Parenti (2021-09-13):
# Consecutive contemporaneous editions of The Air Almanac listed -11:20 for
# Niue as of Apr 1964 but -11 as of Aug 1964:
#   Apr 1964: https://books.google.com/books?id=_1So677Y5vUC&pg=SL1-PA23
#   Aug 1964: https://books.google.com/books?id=MbJloqd-zyUC&pg=SL1-PA23
# Without greater specificity, guess 1964-07-01 for this transition.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Pacific/Niue	-11:19:40 -	LMT	1952 Oct 16	# Alofi
			-11:20	-	%z	1964 Jul
			-11:00	-	%z

# Norfolk
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Pacific/Norfolk	11:11:52 -	LMT	1901 # Kingston
			11:12	-	%z	1951
			11:30	-	%z	1974 Oct 27 02:00s
			11:30	1:00	%z	1975 Mar  2 02:00s
			11:30	-	%z	2015 Oct  4 02:00s
			11:00	-	%z	2019 Jul
			11:00	AN	%z

# Palau (Belau)
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Pacific/Palau	-15:02:04 -	LMT	1844 Dec 31	# Koror
			  8:57:56 -	LMT	1901
			  9:00	-	%z

# Papua New Guinea
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Pacific/Port_Moresby 9:48:40 -	LMT	1880
			9:48:32	-	PMMT	1895 # Port Moresby Mean Time
			10:00	-	%z
#
# From Paul Eggert (2014-10-13):
# Base the Bougainville entry on the Arawa-Kieta region, which appears to have
# the most people even though it was devastated in the Bougainville Civil War.
#
# Although Shanks gives 1942-03-15 / 1943-11-01 for UT +09, these dates
# are apparently rough guesswork from the starts of military campaigns.
# The World War II entries below are instead based on Arawa-Kieta.
# The Japanese occupied Kieta in July 1942,
# according to the Pacific War Online Encyclopedia
# https://pwencycl.kgbudge.com/B/o/Bougainville.htm
# and seem to have controlled it until their 1945-08-21 surrender.
#
# The Autonomous Region of Bougainville switched from UT +10 to +11
# on 2014-12-28 at 02:00.  They call +11 "Bougainville Standard Time".
# See:
# http://www.bougainville24.com/bougainville-issues/bougainville-gets-own-timezone/
#
Zone Pacific/Bougainville 10:22:16 -	LMT	1880
			 9:48:32 -	PMMT	1895
			10:00	-	%z	1942 Jul
			 9:00	-	%z	1945 Aug 21
			10:00	-	%z	2014 Dec 28  2:00
			11:00	-	%z

# Pitcairn
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Pacific/Pitcairn	-8:40:20 -	LMT	1901        # Adamstown
			-8:30	-	%z	1998 Apr 27  0:00
			-8:00	-	%z

# American Samoa
# Midway
Zone Pacific/Pago_Pago	 12:37:12 -	LMT	1892 Jul  5
			-11:22:48 -	LMT	1911
			-11:00	-	SST	            # S=Samoa

# Samoa (formerly and also known as Western Samoa)

# From Steffen Thorsen (2009-10-16):
# We have been in contact with the government of Samoa again, and received
# the following info:
#
# "Cabinet has now approved Daylight Saving to be effected next year
# commencing from the last Sunday of September 2010 and conclude first
# Sunday of April 2011."
#
# Background info:
# https://www.timeanddate.com/news/time/samoa-dst-plan-2009.html
#
# Samoa's Daylight Saving Time Act 2009 is available here, but does not
# contain any dates:
# http://www.parliament.gov.ws/documents/acts/Daylight%20Saving%20Act%20%202009%20(English)%20-%20Final%207-7-091.pdf

# From Laupue Raymond Hughes (2010-10-07):
# Please see
# http://www.mcil.gov.ws
# the Ministry of Commerce, Industry and Labour (sideframe) "Last Sunday
# September 2010 (26/09/10) - adjust clocks forward from 12:00 midnight
# to 01:00am and First Sunday April 2011 (03/04/11) - adjust clocks
# backwards from 1:00am to 12:00am"

# From Laupue Raymond Hughes (2011-03-07):
# [http://www.mcil.gov.ws/ftcd/daylight_saving_2011.pdf]
#
# ... when the standard time strikes the hour of four o'clock (4.00am
# or 0400 Hours) on the 2nd April 2011, then all instruments used to
# measure standard time are to be adjusted/changed to three o'clock
# (3:00am or 0300Hrs).

# From David Zülke (2011-05-09):
# Subject: Samoa to move timezone from east to west of international date line
#
# http://www.morningstar.co.uk/uk/markets/newsfeeditem.aspx?id=138501958347963

# From Paul Eggert (2014-06-27):
# The International Date Line Act 2011
# http://www.parliament.gov.ws/images/ACTS/International_Date_Line_Act__2011_-_Eng.pdf
# changed Samoa from UT -11 to +13, effective "12 o'clock midnight, on
# Thursday 29th December 2011".  The International Date Line was adjusted
# accordingly.

# From Laupue Raymond Hughes (2011-09-02):
# http://www.mcil.gov.ws/mcil_publications.html
#
# here is the official website publication for Samoa DST and dateline change
#
# DST
# Year  End      Time              Start        Time
# 2011  - - -    - - -             24 September 3:00am to 4:00am
# 2012  01 April 4:00am to 3:00am  - - -        - - -
#
# Dateline Change skip Friday 30th Dec 2011
# Thursday 29th December 2011	23:59:59 Hours
# Saturday 31st December 2011	00:00:00 Hours
#
# From Nicholas Pereira (2012-09-10):
# Daylight Saving Time commences on Sunday 30th September 2012 and
# ends on Sunday 7th of April 2013....
# http://www.mcil.gov.ws/mcil_publications.html
#
# From Paul Eggert (2014-07-08):
# That web page currently lists transitions for 2012/3 and 2013/4.
# Assume the pattern instituted in 2012 will continue indefinitely.
#
# From Geoffrey D. Bennett (2021-09-20):
# https://www.mcil.gov.ws/storage/2021/09/MCIL-Scan_20210920_120553.pdf
# DST has been cancelled for this year.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	WS	2010	only	-	Sep	lastSun	0:00	1	-
Rule	WS	2011	only	-	Apr	Sat>=1	4:00	0	-
Rule	WS	2011	only	-	Sep	lastSat	3:00	1	-
Rule	WS	2012	2021	-	Apr	Sun>=1	4:00	0	-
Rule	WS	2012	2020	-	Sep	lastSun	3:00	1	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Pacific/Apia	 12:33:04 -	LMT	1892 Jul  5
			-11:26:56 -	LMT	1911
			-11:30	-	%z	1950
			-11:00	WS	%z	2011 Dec 29 24:00
			 13:00	WS	%z

# Solomon Is
# excludes Bougainville, for which see Papua New Guinea
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Pacific/Guadalcanal 10:39:48 -	LMT	1912 Oct  1 # Honiara
			11:00	-	%z

# Tokelau
#
# From Gwillim Law (2011-12-29)
# A correspondent informed me that Tokelau, like Samoa, will be skipping
# December 31 this year ...
#
# From Steffen Thorsen (2012-07-25)
# ... we double checked by calling hotels and offices based in Tokelau asking
# about the time there, and they all told a time that agrees with UTC+13....
# Shanks says UT-10 from 1901 [but] ... there is a good chance the change
# actually was to UT-11 back then.
#
# From Paul Eggert (2012-07-25)
# A Google Books snippet of Appendix to the Journals of the House of
# Representatives of New Zealand, Session 1948,
# <https://books.google.com/books?id=ZaVCAQAAIAAJ>, page 65, says Tokelau
# was "11 hours slow on G.M.T."  Go with Thorsen and assume Shanks & Pottenger
# are off by an hour starting in 1901.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Pacific/Fakaofo	-11:24:56 -	LMT	1901
			-11:00	-	%z	2011 Dec 30
			13:00	-	%z

# Tonga
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Tonga	1999	only	-	Oct	 7	2:00s	1:00	-
Rule	Tonga	2000	only	-	Mar	19	2:00s	0	-
Rule	Tonga	2000	2001	-	Nov	Sun>=1	2:00	1:00	-
Rule	Tonga	2001	2002	-	Jan	lastSun	2:00	0	-
Rule	Tonga	2016	only	-	Nov	Sun>=1	2:00	1:00	-
Rule	Tonga	2017	only	-	Jan	Sun>=15	3:00	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Pacific/Tongatapu	12:19:12 -	LMT	1945 Sep 10
			12:20	-	%z	1961
			13:00	-	%z	1999
			13:00	Tonga	%z


# US minor outlying islands

# Howland, Baker
# Howland was mined for guano by American companies 1857-1878 and British
# 1886-1891; Baker was similar but exact dates are not known.
# Inhabited by civilians 1935-1942; U.S. military bases 1943-1944;
# uninhabited thereafter.
# Howland observed Hawaii Standard Time (UT -10:30) in 1937;
# see page 206 of Elgen M. Long and Marie K. Long,
# Amelia Earhart: the Mystery Solved, Simon & Schuster (2000).
# So most likely Howland and Baker observed Hawaii Time from 1935
# until they were abandoned after the war.

# Jarvis
# Mined for guano by American companies 1857-1879 and British 1883?-1891?.
# Inhabited by civilians 1935-1942; IGY scientific base 1957-1958;
# uninhabited thereafter.
# no information; was probably like Pacific/Kiritimati

# Johnston
#
# From Paul Eggert (2017-02-10):
# Sometimes Johnston kept Hawaii time, and sometimes it was an hour behind.
# Details are uncertain.  We have no data for Johnston after 1970, so
# treat it like Hawaii for now.  Since Johnston is now uninhabited,
# its link to Pacific/Honolulu is in the 'backward' file.
#
# In his memoirs of June 6th to October 4, 1945
# <http://www.315bw.org/Herb_Bach.htm> (2005), Herbert C. Bach writes,
# "We started our letdown to Kwajalein Atoll and landed there at 5:00 AM
# Johnston time, 1:30 AM Kwajalein time."  This was in June 1945, and
# confirms that Johnston kept the same time as Honolulu in summer 1945.
#
# From Lyle McElhaney (2014-03-11):
# [W]hen JI was being used for that [atomic bomb] testing, the time being used
# was not Hawaiian time but rather the same time being used on the ships,
# which had a GMT offset of -11 hours.  This apparently applied to at least the
# time from Operation Newsreel (Hardtack I/Teak shot, 1958-08-01) to the last
# Operation Fishbowl shot (Tightrope, 1962-11-04).... [See] Herman Hoerlin,
# "The United States High-Altitude Test Experience: A Review Emphasizing the
# Impact on the Environment", Los Alamos LA-6405, Oct 1976.
# https://www.fas.org/sgp/othergov/doe/lanl/docs1/00322994.pdf
# See the table on page 4 where he lists GMT and local times for the tests; a
# footnote for the JI tests reads that local time is "JI time = Hawaii Time
# Minus One Hour".

# Kingman
# uninhabited

# Palmyra
# uninhabited since World War II; was probably like Pacific/Kiritimati


# Vanuatu

# From P Chan (2020-11-27):
# Joint Daylight Saving Regulation No 59 of 1973
# New Hebrides Condominium Gazette No 336. December 1973
# http://www.paclii.org/vu/other/VUNHGovGaz//1973/11.pdf#page=15
#
# Joint Daylight Saving (Repeal) Regulation No 10 of 1974
# New Hebrides Condominium Gazette No 336. March 1974
# http://www.paclii.org/vu/other/VUNHGovGaz//1974/3.pdf#page=11
#
# Summer Time Act No. 35 of 1982 [commenced 1983-09-01]
# http://www.paclii.org/vu/other/VUGovGaz/1982/32.pdf#page=48
#
# Summer Time Act (Cap 157)
# Laws of the Republic of Vanuatu Revised Edition 1988
# http://www.paclii.org/cgi-bin/sinodisp/vu/legis/consol_act1988/sta147/sta147.html
#
# Summer Time (Amendment) Act No. 6 of 1991 [commenced 1991-11-11]
# http://www.paclii.org/vu/legis/num_act/sta1991227/
#
# Summer Time (Repeal) Act No. 4 of 1993 [commenced 1993-05-03]
# http://www.paclii.org/vu/other/VUGovGaz/1993/15.pdf#page=59

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Vanuatu	1973	only	-	Dec	22	12:00u	1:00	-
Rule	Vanuatu	1974	only	-	Mar	30	12:00u	0	-
Rule	Vanuatu	1983	1991	-	Sep	Sat>=22	24:00	1:00	-
Rule	Vanuatu	1984	1991	-	Mar	Sat>=22	24:00	0	-
Rule	Vanuatu	1992	1993	-	Jan	Sat>=22	24:00	0	-
Rule	Vanuatu	1992	only	-	Oct	Sat>=22	24:00	1:00	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Pacific/Efate	11:13:16 -	LMT	1912 Jan 13 # Vila
			11:00	Vanuatu	%z

###############################################################################

# NOTES

# This file is by no means authoritative; if you think you know better,
# go ahead and edit the file (and please send any changes to
# tz@iana.org for general use in the future).  For more, please see
# the file CONTRIBUTING in the tz distribution.

# From Paul Eggert (2018-11-18):
#
# Unless otherwise specified, the source for data through 1990 is:
# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
# San Diego: ACS Publications, Inc. (2003).
# Unfortunately this book contains many errors and cites no sources.
#
# Many years ago Gwillim Law wrote that a good source
# for time zone data was the International Air Transport
# Association's Standard Schedules Information Manual (IATA SSIM),
# published semiannually.  Law sent in several helpful summaries
# of the IATA's data after 1990.  Except where otherwise noted,
# IATA SSIM is the source for entries after 1990.
#
# Another source occasionally used is Edward W. Whitman, World Time Differences,
# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
# I found in the UCLA library.
#
# For data circa 1899, a common source is:
# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
# https://www.jstor.org/stable/1774359
#
# For the 1911/1912 establishment of standard time in French possessions, see:
# Société Française de Physique, Recueil de constantes physiques (1913),
# page 752, 18b.
#
# A reliable and entertaining source about time zones is
# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
#
# I invented the abbreviation marked "*".
# The following abbreviations are from other sources.
# Corrections are welcome!
#		std	dst
#		LMT		Local Mean Time
#	  8:00	AWST	AWDT	Western Australia
#	  9:30	ACST	ACDT	Central Australia
#	 10:00	AEST	AEDT	Eastern Australia
#	 10:00	GST	GDT*	Guam through 2000
#	 10:00	ChST		Chamorro
#	 11:30	NZMT	NZST	New Zealand through 1945
#	 12:00	NZST	NZDT	New Zealand 1946-present
#	-11:00	SST		Samoa
#	-10:00	HST		Hawaii
#
# See the 'northamerica' file for Hawaii.
# See the 'southamerica' file for Easter I and the Galápagos Is.

###############################################################################

# Australia

# From Paul Eggert (2014-06-30):
# Daylight saving time has long been controversial in Australia, pitting
# region against region, rural against urban, and local against global.
# For example, in her review of Graeme Davison's _The Unforgiving
# Minute: how Australians learned to tell the time_ (1993), Perth native
# Phillipa J Martyr wrote, "The section entitled 'Saving Daylight' was
# very informative, but was (as can, sadly, only be expected from a
# Melbourne-based study) replete with the usual chuckleheaded
# Queenslanders and straw-chewing yokels from the West prattling fables
# about fading curtains and crazed farm animals."
# Electronic Journal of Australian and New Zealand History (1997-03-03)
# http://www.jcu.edu.au/aff/history/reviews/davison.htm

# From P Chan (2020-11-20):
# Daylight Saving Act 1916 (No. 40 of 1916) [1916-12-21, commenced 1917-01-01]
# http://classic.austlii.edu.au/au/legis/cth/num_act/dsa1916401916192/
#
# Daylight Saving Repeal Act 1917 (No. 35 of 1917) [1917-09-25]
# http://classic.austlii.edu.au/au/legis/cth/num_act/dsra1917351917243/
#
# Statutory Rules 1941, No. 323 [1941-12-24]
# https://www.legislation.gov.au/Details/C1941L00323
#
# Statutory Rules 1942, No. 392 [1942-09-10]
# https://www.legislation.gov.au/Details/C1942L00392
#
# Statutory Rules 1943, No. 241 [1943-09-29]
# https://www.legislation.gov.au/Details/C1943L00241
#
# All transition times should be 02:00 standard time.


# From Paul Eggert (2005-12-08):
# Implementation Dates of Daylight Saving Time within Australia
# http://www.bom.gov.au/climate/averages/tables/dst_times.shtml
# summarizes daylight saving issues in Australia.

# From Arthur David Olson (2005-12-12):
# Lawlink NSW:Daylight Saving in New South Wales
# http://www.lawlink.nsw.gov.au/lawlink/Corporate/ll_agdinfo.nsf/pages/community_relations_daylight_saving
# covers New South Wales in particular.

# From John Mackin (1991-03-06):
# We in Australia have _never_ referred to DST as 'daylight' time.
# It is called 'summer' time.  Now by a happy coincidence, 'summer'
# and 'standard' happen to start with the same letter; hence, the
# abbreviation does _not_ change...
# The legislation does not actually define abbreviations, at least
# in this State, but the abbreviation is just commonly taken to be the
# initials of the phrase, and the legislation here uniformly uses
# the phrase 'summer time' and does not use the phrase 'daylight
# time'.
# Announcers on the Commonwealth radio network, the ABC (for Australian
# Broadcasting Commission), use the phrases 'Eastern Standard Time'
# or 'Eastern Summer Time'.  (Note, though, that as I say in the
# current australasia file, there is really no such thing.)  Announcers
# on its overseas service, Radio Australia, use the same phrases
# prefixed by the word 'Australian' when referring to local times;
# time announcements on that service, naturally enough, are made in UTC.

# From Paul Eggert (2014-06-30):
#
# Inspired by Mackin's remarks quoted above, earlier versions of this
# file used "EST" for both Eastern Standard Time and Eastern Summer
# Time in Australia, and similarly for "CST", "CWST", and "WST".
# However, these abbreviations were confusing and were not common
# practice among Australians, and there were justifiable complaints
# about them, so I attempted to survey current Australian usage.
# For the tz database, the full English phrase is not that important;
# what matters is the abbreviation.  It's difficult to survey the web
# directly for abbreviation usage, as there are so many false hits for
# strings like "EST" and "EDT", so I looked for pages that defined an
# abbreviation for eastern or central DST in Australia, and got the
# following numbers of unique hits for the listed Google queries:
#
#   10 "Eastern Daylight Time AEST" site:au [some are false hits]
#   10 "Eastern Summer Time AEST" site:au
#   10 "Summer Time AEDT" site:au
#   13 "EDST Eastern Daylight Saving Time" site:au
#   18 "Summer Time ESST" site:au
#   28 "Eastern Daylight Saving Time EDST" site:au
#   39 "EDT Eastern Daylight Time" site:au [some are false hits]
#   53 "Eastern Daylight Time EDT" site:au [some are false hits]
#   54 "AEDT Australian Eastern Daylight Time" site:au
#  182 "Eastern Daylight Time AEDT" site:au
#
#   17 "Central Daylight Time CDT" site:au [some are false hits]
#   46 "Central Daylight Time ACDT" site:au
#
# I tried several other variants (e.g., "Eastern Summer Time EST") but
# they all returned fewer than 10 unique hits.  I also looked for pages
# mentioning both "western standard time" and an abbreviation, since
# there is no WST in the US to generate false hits, and found:
#
#  156 "western standard time" AWST site:au
#  226 "western standard time" WST site:au
#
# I then surveyed the top ten newspapers in Australia by circulation as
# listed in Wikipedia, using Google queries like "AEDT site:heraldsun.com.au"
# and obtaining estimated counts from the initial page of search results.
# All ten papers greatly preferred "AEDT" to "EDT".  The papers
# surveyed were the Herald Sun, The Daily Telegraph, The Courier-Mail,
# The Sydney Morning Herald, The West Australian, The Age, The Advertiser,
# The Australian, The Financial Review, and The Herald (Newcastle).
#
# I also searched for historical usage, to see whether abbreviations
# like "AEDT" are new.  A Trove search <http://trove.nla.gov.au/>
# found only one newspaper (The Canberra Times) with a house style
# dating back to the 1970s, I expect because other newspapers weren't
# fully indexed.  The Canberra Times strongly preferred abbreviations
# like "AEDT".  The first occurrence of "AEDT" was a World Weather
# column (1971-11-17, page 24), and of "ACDT" was a Scoreboard column
# (1993-01-24, p 16).  The style was the typical usage but was not
# strictly enforced; for example, "Welcome to the twilight zones ..."
# (1994-10-29, p 1) uses the abbreviations AEST/AEDT, CST/CDT, and
# WST, and goes on to say, "The confusion and frustration some feel
# about the lack of uniformity among Australia's six states and two
# territories has prompted one group to form its very own political
# party -- the Sydney-based Daylight Saving Extension Party."
#
# I also surveyed federal government sources.  They did not agree:
#
#   The Australian Government (2014-03-26)
#   http://australia.gov.au/about-australia/our-country/time
#   (This document was produced by the Department of Finance.)
#   AEST ACST AWST AEDT ACDT
#
#   Bureau of Meteorology (2012-11-08)
#   http://www.bom.gov.au/climate/averages/tables/daysavtm.shtml
#   EST CST WST EDT CDT
#
#   Civil Aviation Safety Authority (undated)
#   http://services.casa.gov.au/outnback/inc/pages/episode3/episode-3_time_zones.shtml
#   EST CST WST (no abbreviations given for DST)
#
#   Geoscience Australia (2011-11-24)
#   http://www.ga.gov.au/geodesy/astro/sunrise.jsp
#   AEST ACST AWST AEDT ACDT
#
#   Parliamentary Library (2008-11-10)
#   https://www.aph.gov.au/binaries/library/pubs/rp/2008-09/09rp14.pdf
#   EST CST WST preferred for standard time; AEST AEDT ACST ACDT also used
#
#   The Transport Safety Bureau has an extensive series of accident reports,
#   and investigators seem to use whatever abbreviation they like.
#   Googling site:atsb.gov.au found the following number of unique hits:
#   311 "ESuT", 195 "EDT", 26 "AEDT", 83 "CSuT", 46 "CDT".
#   "_SuT" tended to appear in older reports, and "A_DT" tended to
#   appear in reports of events with international implications.
#
# From the above it appears that there is a working consensus in
# Australia to use trailing "DT" for daylight saving time; although
# some sources use trailing "SST" or "ST" or "SuT" they are by far in
# the minority.  The case for leading "A" is weaker, but since it
# seems to be preferred in the overall web and is preferred in all
# the leading newspaper websites and in many government departments,
# it has a stronger case than omitting the leading "A".  The current
# version of the database therefore uses abbreviations like "AEST" and
# "AEDT" for Australian time zones.

# From Paul Eggert (1995-12-19):
# Shanks & Pottenger report 2:00 for all autumn changes in Australia and NZ.
# Mark Prior writes that his newspaper
# reports that NSW's fall 1995 change will occur at 2:00,
# but Robert Elz says it's been 3:00 in Victoria since 1970
# and perhaps the newspaper's '2:00' is referring to standard time.
# For now we'll continue to assume 2:00s for changes since 1960.

# From Eric Ulevik (1998-01-05):
#
# Here are some URLs to Australian time legislation. These URLs are stable,
# and should probably be included in the data file. There are probably more
# relevant entries in this database.
#
# NSW (including LHI and Broken Hill):
# Standard Time Act 1987 (updated 1995-04-04)
# https://www.austlii.edu.au/au/legis/nsw/consol_act/sta1987137/index.html
# ACT
# Standard Time and Summer Time Act 1972
# https://www.austlii.edu.au/au/legis/act/consol_act/stasta1972279/index.html
# SA
# Standard Time Act, 1898
# https://www.austlii.edu.au/au/legis/sa/consol_act/sta1898137/index.html

# From David Grosz (2005-06-13):
# It was announced last week that Daylight Saving would be extended by
# one week next year to allow for the 2006 Commonwealth Games.
# Daylight Saving is now to end for next year only on the first Sunday
# in April instead of the last Sunday in March.
#
# From Gwillim Law (2005-06-14):
# I did some Googling and found that all of those states (and territory) plan
# to extend DST together in 2006.
# ACT: http://www.cmd.act.gov.au/mediareleases/fileread.cfm?file=86.txt
# New South Wales: http://www.thecouriermail.news.com.au/common/story_page/0,5936,15538869%255E1702,00.html
# South Australia: http://www.news.com.au/story/0,10117,15555031-1246,00.html
# Tasmania: http://www.media.tas.gov.au/release.php?id=14772
# Victoria: I wasn't able to find anything separate, but the other articles
# allude to it.
# But not Queensland
# http://www.news.com.au/story/0,10117,15564030-1248,00.html

# Northern Territory

# From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
# # The NORTHERN TERRITORY..  [ Courtesy N.T. Dept of the Chief Minister ]
# #					[ Nov 1990 ]
# #	N.T. have never utilised any DST due to sub-tropical/tropical location.
# ...
# Zone        Australia/North         9:30    -       CST

# From Bradley White (1991-03-04):
# A recent excerpt from an Australian newspaper...
# the Northern Territory do[es] not have daylight saving.

# Western Australia

# From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
# #  The state of WESTERN AUSTRALIA..  [ Courtesy W.A. dept Premier+Cabinet ]
# #						[ Nov 1990 ]
# #	W.A. suffers from a great deal of public and political opposition to
# #	DST in principle. A bill is brought before parliament in most years, but
# #	usually defeated either in the upper house, or in party caucus
# #	before reaching parliament.
# ...
# Zone	Australia/West		8:00	AW	%sST
# ...
# Rule	AW	1974	only	-	Oct	lastSun	2:00	1:00	D
# Rule	AW	1975	only	-	Mar	Sun>=1	3:00	0	W
# Rule	AW	1983	only	-	Oct	lastSun	2:00	1:00	D
# Rule	AW	1984	only	-	Mar	Sun>=1	3:00	0	W

# From Bradley White (1991-03-04):
# A recent excerpt from an Australian newspaper...
# Western Australia...do[es] not have daylight saving.

# From John D. Newman via Bradley White (1991-11-02):
# Western Australia is still on "winter time". Some DH in Sydney
# rang me at home a few days ago at 6.00am. (He had just arrived at
# work at 9.00am.)
# W.A. is switching to Summer Time on Nov 17th just to confuse
# everybody again.

# From Arthur David Olson (1992-03-08):
# The 1992 ending date used in the rules is a best guess;
# it matches what was used in the past.

# From Christopher Hunt (2006-11-21), after an advance warning
# from Jesper Nørgaard Welen (2006-11-01):
# WA are trialing DST for three years.
# http://www.parliament.wa.gov.au/parliament/bills.nsf/9A1B183144403DA54825721200088DF1/$File/Bill175-1B.pdf

# From Paul Eggert (2018-04-01):
# The Guardian Express of Perth, Australia reported today that the
# government decided to advance the clocks permanently on January 1,
# 2019, from UT +08 to UT +09.  The article noted that an exemption
# would be made for people aged 61 and over, who "can apply in writing
# to have the extra hour of sunshine removed from their area."  See:
# Daylight saving coming to WA in 2019. Guardian Express. 2018-04-01.
# https://www.communitynews.com.au/guardian-express/news/exclusive-daylight-savings-coming-wa-summer-2018/
# [The article ends with "Today's date is April 1."]

# The Australian Bureau of Meteorology FAQ
# http://www.bom.gov.au/faq/faqgen.htm
# (1999-09-27) writes that Giles Meteorological Station uses
# South Australian time even though it's located in Western Australia.

# From Rives McDow (2002-04-09):
# The most interesting region I have found consists of three towns on the
# southern coast....  South Australia observes daylight saving time; Western
# Australia does not.  The two states are one and a half hours apart.  The
# residents decided to forget about this nonsense of changing the clock so
# much and set the local time 20 hours and 45 minutes from the
# international date line, or right in the middle of the time of South
# Australia and Western Australia....
#
# From Paul Eggert (2002-04-09):
# This is confirmed by the section entitled
# "What's the deal with time zones???" in
# http://www.earthsci.unimelb.edu.au/~awatkins/null.html
#
# From Alex Livingston (2006-12-07):
# ... it was just on four years ago that I drove along the Eyre Highway,
# which passes through eastern Western Australia close to the southern
# coast of the continent.
#
# I paid particular attention to the time kept there. There can be no
# dispute that UTC+08:45 was considered "the time" from the border
# village just inside the border with South Australia to as far west
# as just east of Caiguna. There can also be no dispute that Eucla is
# the largest population centre in this zone....
#
# Now that Western Australia is observing daylight saving, the
# question arose whether this part of the state would follow suit. I
# just called the border village and confirmed that indeed they have,
# meaning that they are now observing UTC+09:45.
#
# (2006-12-09):
# I personally doubt that either experimentation with daylight saving
# in WA or its introduction in SA had anything to do with the genesis
# of this time zone.  My hunch is that it's been around since well
# before 1975.  I remember seeing it noted on road maps decades ago.
#
# From Gilmore Davidson (2019-04-08):
# https://www.abc.net.au/news/2019-04-08/this-remote-stretch-of-desert-has-its-own-custom-time-zone/10981000
# ... include[s] a rough description of the geographical boundaries...
# "The time zone exists for about 340 kilometres and takes in the tiny
# roadhouse communities of Cocklebiddy, Madura, Eucla and Border Village."
# ... and an indication that the zone has definitely been in existence
# since before the 1970 cut-off of the database ...
# From Paul Eggert (2019-05-17):
# That ABC Esperance story by Christien de Garis also says:
#    Although the Central Western Time Zone is not officially recognised (your
#    phones won't automatically change), there is a sign instructing you which
#    way to wind your clocks 45 minutes and scrawled underneath one of them in
#    Texta is the word: 'Why'?
#    "Good question," Mr Pike said.
#    "I don't even know that, and it's been going for over 50 years."

# From Paul Eggert (2006-12-15):
# For lack of better info, assume the tradition dates back to the
# introduction of standard time in 1895.

# From Stuart Bishop (2024-11-12):
# An article discussing the in-use but technically unofficial timezones
# in the Western Australian portion of the Nullarbor Plain.
# https://www.abc.net.au/news/2024-11-22/outback-wa-properties-strange-time-zones/104542494
# From Paul Eggert (2024-11-12):
# As the article says, the Eyre Bird Observatory and nearby sheep stations
# can use Tokyo time.  Other possibilities include Asia/Chita, Asia/Seoul,
# and Asia/Jayapura.

# Queensland

# From Paul Eggert (2018-02-26):
# I lack access to the following source for Queensland DST:
# Pearce C. History of daylight saving time in Queensland.
# Queensland Hist J. 2017 Aug;23(6):389-403
# https://search.informit.com.au/documentSummary;dn=994682348436426;res=IELHSS

# From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
# #   The state of QUEENSLAND.. [ Courtesy Qld. Dept Premier Econ&Trade Devel ]
# #						[ Dec 1990 ]
# ...
# Zone	Australia/Queensland	10:00	AQ	%sST
# ...
# Rule	AQ	1971	only	-	Oct	lastSun	2:00	1:00	D
# Rule	AQ	1972	only	-	Feb	lastSun	3:00	0	E
# Rule	AQ	1989	max	-	Oct	lastSun	2:00	1:00	D
# Rule	AQ	1990	max	-	Mar	Sun>=1	3:00	0	E

# From Bradley White (1989-12-24):
# "Australia/Queensland" now observes daylight time (i.e. from
# October 1989).

# From Bradley White (1991-03-04):
# A recent excerpt from an Australian newspaper...
# ...Queensland...[has] agreed to end daylight saving
# at 3am tomorrow (March 3)...

# From John Mackin (1991-03-06):
# I can certainly confirm for my part that Daylight Saving in NSW did in fact
# end on Sunday, 3 March.  I don't know at what hour, though.  (It surprised
# me.)

# From Bradley White (1992-03-08):
# ...there was recently a referendum in Queensland which resulted
# in the experimental daylight saving system being abandoned. So, ...
# ...
# Rule	QLD	1989	1991	-	Oct	lastSun	2:00	1:00	D
# Rule	QLD	1990	1992	-	Mar	Sun>=1	3:00	0	S
# ...

# From Arthur David Olson (1992-03-08):
# The chosen rules the union of the 1971/1972 change and the 1989-1992 changes.


# southeast Australia
#
# From Paul Eggert (2007-07-23):
# Starting autumn 2008 Victoria, NSW, South Australia, Tasmania and the ACT
# end DST the first Sunday in April and start DST the first Sunday in October.
# http://www.theage.com.au/news/national/daylight-savings-to-span-six-months/2007/06/27/1182623966703.html


# South Australia

# From Bradley White (1991-03-04):
# A recent excerpt from an Australian newspaper...
# ...South Australia...[has] agreed to end daylight saving
# at 3am tomorrow (March 3)...

# From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
# #   The state of SOUTH AUSTRALIA....[ Courtesy of S.A. Dept of Labour ]
# #						[ Nov 1990 ]
# ...
# Zone	Australia/South		9:30	AS	%sST
# ...
# Rule	 AS	1971	max	-	Oct	lastSun	2:00	1:00	D
# Rule	 AS	1972	1985	-	Mar	Sun>=1	3:00	0	C
# Rule	 AS	1986	1990	-	Mar	Sun>=15	3:00	0	C
# Rule	 AS	1991	max	-	Mar	Sun>=1	3:00	0	C

# From Bradley White (1992-03-11):
# Recent correspondence with a friend in Adelaide
# contained the following exchange:  "Due to the Adelaide Festival,
# South Australia delays setting back our clocks for a few weeks."

# From Robert Elz (1992-03-13):
# I heard that apparently (or at least, it appears that)
# South Aus will have an extra 3 weeks daylight saving every even
# numbered year (from 1990).  That's when the Adelaide Festival
# is on...

# From Robert Elz (1992-03-16, 00:57:07 +1000):
# DST didn't end in Adelaide today (yesterday)....
# But whether it's "4th Sunday" or "2nd last Sunday" I have no idea whatever...
# (it's just as likely to be "the Sunday we pick for this year"...).

# From Bradley White (1994-04-11):
# If Sun, 15 March, 1992 was at +1030 as kre asserts, but yet Sun, 20 March,
# 1994 was at +0930 as John Connolly's customer seems to assert, then I can
# only conclude that the actual rule is more complicated....

# From John Warburton (1994-10-07):
# The new Daylight Savings dates for South Australia ...
# was gazetted in the Government Hansard on Sep 26 1994....
# start on last Sunday in October and end in last sunday in March.

# From Paul Eggert (2007-07-23):
# See "southeast Australia" above for 2008 and later.

# Tasmania

# From P Chan (2020-11-20):
# Tasmania observed DST in 1916-1919.
#
# Daylight Saving Act, 1916 (7 Geo V, No 2) [1916-09-22]
# http://classic.austlii.edu.au/au/legis/tas/num_act/tdsa19167gvn2267/
#
# Daylight Saving Amendment Act, 1917 (8 Geo V, No 5) [1917-10-01]
# http://classic.austlii.edu.au/au/legis/tas/num_act/tdsaa19178gvn5347/
#
# Daylight Saving Act Repeal Act, 1919 (10 Geo V, No 9) [1919-10-24]
# http://classic.austlii.edu.au/au/legis/tas/num_act/tdsara191910gvn9339/
#
# King Island is mentioned in the 1967 Act but not the 1968 Act.
# Therefore it possibly observed DST from 1968/69.
#
# Daylight Saving Act 1967 (No. 33 of 1967) [1967-09-22]
# http://classic.austlii.edu.au/au/legis/tas/num_act/dsa196733o1967211/
#
# Daylight Saving Act 1968 (No. 42 of 1968) [1968-10-15]
# http://classic.austlii.edu.au/au/legis/tas/num_act/dsa196842o1968211/

# The rules for 1967 through 1991 were reported by George Shepherd
# via Simon Woodhead via Robert Elz (1991-03-06):
# #  The state of TASMANIA.. [Courtesy Tasmanian Dept of Premier + Cabinet ]
# #					[ Nov 1990 ]

# From Bill Hart via Guy Harris (1991-10-10):
# Oh yes, the new daylight savings rules are uniquely tasmanian, we have
# 6 weeks a year now when we are out of sync with the rest of Australia
# (but nothing new about that).

# From Alex Livingston (1999-10-04):
# I heard on the ABC (Australian Broadcasting Corporation) radio news on the
# (long) weekend that Tasmania, which usually goes its own way in this regard,
# has decided to join with most of NSW, the ACT, and most of Victoria
# (Australia) and start daylight saving on the last Sunday in August in 2000
# instead of the first Sunday in October.

# Sim Alam (2000-07-03) reported a legal citation for the 2000/2001 rules:
# http://www.thelaw.tas.gov.au/fragview/42++1968+GS3A@EN+2000070300

# From Paul Eggert (2007-07-23):
# See "southeast Australia" above for 2008 and later.

# Victoria

# The rules for 1971 through 1991 were reported by George Shepherd
# via Simon Woodhead via Robert Elz (1991-03-06):
# #   The state of VICTORIA.. [ Courtesy of Vic. Dept of Premier + Cabinet ]
# #						[ Nov 1990 ]

# From Scott Harrington (2001-08-29):
# On KQED's "City Arts and Lectures" program last night I heard an
# interesting story about daylight savings time.  Dr. John Heilbron was
# discussing his book "The Sun in the Church: Cathedrals as Solar
# Observatories"[1], and in particular the Shrine of Remembrance[2] located
# in Melbourne, Australia.
#
# Apparently the shrine's main purpose is a beam of sunlight which
# illuminates a special spot on the floor at the 11th hour of the 11th day
# of the 11th month (Remembrance Day) every year in memory of Australia's
# fallen WWI soldiers.  And if you go there on Nov. 11, at 11am local time,
# you will indeed see the sunbeam illuminate the special spot at the
# expected time.
#
# However, that is only because of some special mirror contraption that had
# to be employed, since due to daylight savings time, the true solar time of
# the remembrance moment occurs one hour later (or earlier?).  Perhaps
# someone with more information on this jury-rig can tell us more.
#
# [1] http://www.hup.harvard.edu/catalog/HEISUN.html
# [2] http://www.shrine.org.au

# From Paul Eggert (2007-07-23):
# See "southeast Australia" above for 2008 and later.

# New South Wales

# From Arthur David Olson:
# New South Wales and subjurisdictions have their own ideas of a fun time.
# Based on law library research by John Mackin,
# who notes:
#	In Australia, time is not legislated federally, but rather by the
#	individual states.  Thus, while such terms as "Eastern Standard Time"
#	[I mean, of course, Australian EST, not any other kind] are in common
#	use, _they have NO REAL MEANING_, as they are not defined in the
#	legislation.  This is very important to understand.
#	I have researched New South Wales time only...

# From Eric Ulevik (1999-05-26):
# DST will start in NSW on the last Sunday of August, rather than the usual
# October in 2000.  See: Matthew Moore,
# Two months more daylight saving, Sydney Morning Herald (1999-05-26).
# http://www.smh.com.au/news/9905/26/pageone/pageone4.html

# From Paul Eggert (1999-09-27):
# See the following official NSW source:
# Daylight Saving in New South Wales.
# http://dir.gis.nsw.gov.au/cgi-bin/genobject/document/other/daylightsaving/tigGmZ
#
# Narrabri Shire (NSW) council has announced it will ignore the extension of
# daylight saving next year.  See:
# Narrabri Council to ignore daylight saving
# http://abc.net.au/news/regionals/neweng/monthly/regeng-22jul1999-1.htm
# (1999-07-22).  For now, we'll wait to see if this really happens.
#
# Victoria will follow NSW.  See:
# Vic to extend daylight saving (1999-07-28)
# http://abc.net.au/local/news/olympics/1999/07/item19990728112314_1.htm
#
# However, South Australia rejected the DST request.  See:
# South Australia rejects Olympics daylight savings request (1999-07-19)
# http://abc.net.au/news/olympics/1999/07/item19990719151754_1.htm
#
# Queensland also will not observe DST for the Olympics.  See:
# Qld says no to daylight savings for Olympics
# http://abc.net.au/news/olympics/1999/06/item19990601114608_1.htm
# (1999-06-01), which quotes Queensland Premier Peter Beattie as saying
# "Look you've got to remember in my family when this came up last time
# I voted for it, my wife voted against it and she said to me it's all very
# well for you, you don't have to worry about getting the children out of
# bed, getting them to school, getting them to sleep at night.
# I've been through all this argument domestically...my wife rules."
#
# Broken Hill will stick with South Australian time in 2000.  See:
# Broken Hill to be behind the times (1999-07-21)
# http://abc.net.au/news/regionals/brokenh/monthly/regbrok-21jul1999-6.htm

# IATA SSIM (1998-09) says that the spring 2000 change for Australian
# Capital Territory, New South Wales except Lord Howe Island and Broken
# Hill, and Victoria will be August 27, presumably due to the Sydney Olympics.

# From Eric Ulevik, referring to Sydney's Sun Herald (2000-08-13), page 29:
# The Queensland Premier Peter Beattie is encouraging northern NSW
# towns to use Queensland time.

# From Paul Eggert (2007-07-23):
# See "southeast Australia" above for 2008 and later.

# Yancowinna

# From John Mackin (1989-01-04):
# 'Broken Hill' means the County of Yancowinna.

# From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
# # YANCOWINNA..  [ Confirmation courtesy of Broken Hill Postmaster ]
# #					[ Dec 1990 ]
# ...
# # Yancowinna uses Central Standard Time, despite [its] location on the
# # New South Wales side of the S.A. border. Most business and social dealings
# # are with CST zones, therefore CST is legislated by local government
# # although the switch to Summer Time occurs in line with N.S.W. There have
# # been years when this did not apply, but the historical data is not
# # presently available.
# Zone	Australia/Yancowinna	9:30	 AY	%sST
# ...
# Rule	 AY	1971	1985	-	Oct	lastSun	2:00	1:00	D
# Rule	 AY	1972	only	-	Feb	lastSun	3:00	0	C
# [followed by other Rules]

# Lord Howe Island

# From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
# LHI...		[ Courtesy of Pauline Van Winsen ]
#					[ Dec 1990 ]
# Lord Howe Island is located off the New South Wales coast, and is half an
# hour ahead of NSW time.

# From James Lonergan, Secretary, Lord Howe Island Board (2000-01-27):
# Lord Howe Island summer time in 2000/2001 will commence on the same
# date as the rest of NSW (i.e. 2000-08-27).  For your information the
# Lord Howe Island Board (controlling authority for the Island) is
# seeking the community's views on various options for summer time
# arrangements on the Island, e.g. advance clocks by 1 full hour
# instead of only 30 minutes.  [Dependent] on the wishes of residents
# the Board may approach the NSW government to change the existing
# arrangements.  The starting date for summer time on the Island will
# however always coincide with the rest of NSW.

# From James Lonergan, Secretary, Lord Howe Island Board (2000-10-25):
# Lord Howe Island advances clocks by 30 minutes during DST in NSW and retards
# clocks by 30 minutes when DST finishes. Since DST was most recently
# introduced in NSW, the "changeover" time on the Island has been 02:00 as
# shown on clocks on LHI. I guess this means that for 30 minutes at the start
# of DST, LHI is actually 1 hour ahead of the rest of NSW.

# From Paul Eggert (2006-03-22):
# For Lord Howe dates we use Shanks & Pottenger through 1989, and
# Lonergan thereafter.  For times we use Lonergan.

# From Paul Eggert (2007-07-23):
# See "southeast Australia" above for 2008 and later.

# From Steffen Thorsen (2009-04-28):
# According to the official press release, South Australia's extended daylight
# saving period will continue with the same rules as used during the 2008-2009
# summer (southern hemisphere).
#
# From
# http://www.safework.sa.gov.au/uploaded_files/DaylightDatesSet.pdf
# The extended daylight saving period that South Australia has been trialling
# for over the last year is now set to be ongoing.
# Daylight saving will continue to start on the first Sunday in October each
# year and finish on the first Sunday in April the following year.
# Industrial Relations Minister, Paul Caica, says this provides South Australia
# with a consistent half hour time difference with NSW, Victoria, Tasmania and
# the ACT for all 52 weeks of the year...
#
# We have a wrap-up here:
# https://www.timeanddate.com/news/time/south-australia-extends-dst.html
###############################################################################

# New Zealand

# From Mark Davies (1990-10-03):
# the 1989/90 year was a trial of an extended "daylight saving" period.
# This trial was deemed successful and the extended period adopted for
# subsequent years (with the addition of a further week at the start).
# source - phone call to Ministry of Internal Affairs Head Office.

# From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
# # The Country of New Zealand   (Australia's east island -) Gee they hate that!
# #				   or is Australia the west island of N.Z.
# #	[ courtesy of Geoff Tribble.. Auckland N.Z. ]
# #				[ Nov 1990 ]
# ...
# Rule	NZ      1974    1988	-	Oct	lastSun	2:00	1:00	D
# Rule	NZ	1989	max	-	Oct	Sun>=1	2:00	1:00	D
# Rule	NZ      1975    1989	-	Mar	Sun>=1	3:00	0	S
# Rule	NZ	1990	max	-	Mar	lastSun	3:00	0	S
# ...
# Zone	NZ			12:00	NZ		NZ%sT	# New Zealand
# Zone	NZ-CHAT			12:45	-		NZ-CHAT # Chatham Island

# From Arthur David Olson (1992-03-08):
# The chosen rules use the Davies October 8 values for the start of DST in 1989
# rather than the October 1 value.

# From Paul Eggert (1995-12-19);
# Shank & Pottenger report 2:00 for all autumn changes in Australia and NZ.
# Robert Uzgalis writes that the New Zealand Daylight
# Savings Time Order in Council dated 1990-06-18 specifies 2:00 standard
# time on both the first Sunday in October and the third Sunday in March.
# As with Australia, we'll assume the tradition is 2:00s, not 2:00.
#
# From Paul Eggert (2006-03-22):
# The Department of Internal Affairs (DIA) maintains a brief history,
# as does Carol Squires; see tz-link.html for the full references.
# Use these sources in preference to Shanks & Pottenger.
#
# For Chatham, IATA SSIM (1991/1999) gives the NZ rules but with
# transitions at 2:45 local standard time; this confirms that Chatham
# is always exactly 45 minutes ahead of Auckland.

# From Colin Sharples (2007-04-30):
# DST will now start on the last Sunday in September, and end on the
# first Sunday in April.  The changes take effect this year, meaning
# that DST will begin on 2007-09-30 2008-04-06.
# http://www.dia.govt.nz/diawebsite.nsf/wpg_URL/Services-Daylight-Saving-Daylight-saving-to-be-extended

# From Paul Eggert (2014-07-14):
# Chatham Island time was formally standardized on 1957-01-01 by
# New Zealand's Standard Time Amendment Act 1956 (1956-10-26).
# https://www.austlii.edu.au/nz/legis/hist_act/staa19561956n100244.pdf
# According to Google Books snippet view, a speaker in the New Zealand
# parliamentary debates in 1956 said "Clause 78 makes provision for standard
# time in the Chatham Islands.  The time there is 45 minutes in advance of New
# Zealand time.  I understand that is the time they keep locally, anyhow."
# For now, assume this practice goes back to the introduction of standard time
# in New Zealand, as this would make Chatham Islands time almost exactly match
# LMT back when New Zealand was at UT +11:30; also, assume Chatham Islands did
# not observe New Zealand's prewar DST.

###############################################################################


# Bonin (Ogasawara) Islands and Marcus Island (Minami-Tori-shima)

# From Wakaba (2019-01-28) via Phake Nick:
# National Diet Library of Japan has several reports by Japanese Government
# officers that describe the time used in islands when they visited there.
# According to them (and other sources such as newspapers), standard time UTC
# + 10 (JST + 1) and DST UTC + 11 (JST + 2) was used until its return to Japan
# at 1968-06-26 00:00 JST.  The exact periods of DST are still unknown.
# I guessed Guam, Mariana, and Bonin and Marcus districts might have
# synchronized their DST periods, but reports imply they had their own
# decisions, i.e. there were three or more different time zones....
#
# https://wiki.suikawiki.org/n/小笠原諸島の標準時

# From Phake Nick (2019-02-12):
# Because their last time change to return to Japanese time when they returned
# to Japanese rule was right before 1970, ... per the current tz database
# rule, the information doesn't warrant creation of a new timezone for Bonin
# Islands itself and is thus as an anecdotal note for interest purpose only.
# ... [The abovementioned link] described some special timekeeping phenomenon
# regarding Marcus island, another remote island currently owned by Japanese
# in the same administrative unit as Bonin Islands.  Many reports claim that
# the American coastal guard on the American quarter of the island use its own
# coastal guard time, and most sources describe the time as UTC+11, being two
# hours faster than JST used by some Japanese personnel on the island.  Some
# sites describe it as same as Wake Island/Guam time although it would be
# incorrect to be same as Guam.  And then in a few Japanese governmental
# report from 1980s (from National Institute of Information and Communications
# Technology) regarding the construction of VLBI facility on the Marcus
# Island, it claimed that there are three time standards being used on the
# island at the time which include not just JST (UTC+9) or [US]CG time
# (UTC+11) but also a JMSDF time (UTC+10) (Japan Maritime Self-Defense
# Force).  Unfortunately there are no other sources that mentioned such time
# and there are also no information on things like how the time was used.


# Fiji

# Howse writes (p 153) that in 1879 the British governor of Fiji
# enacted an ordinance standardizing the islands on Antipodean Time
# instead of the American system (which was one day behind).

# From Rives McDow (1998-10-08):
# Fiji will introduce DST effective 0200 local time, 1998-11-01
# until 0300 local time 1999-02-28.  Each year the DST period will
# be from the first Sunday in November until the last Sunday in February.

# From Paul Eggert (2000-01-08):
# IATA SSIM (1999-09) says DST ends 0100 local time.  Go with McDow.

# From the BBC World Service in
# http://news.bbc.co.uk/2/hi/asia-pacific/205226.stm (1998-10-31 16:03 UTC):
# The Fijian government says the main reasons for the time change is to
# improve productivity and reduce road accidents.... [T]he move is also
# intended to boost Fiji's ability to attract tourists to witness the dawning
# of the new millennium.

# http://www.fiji.gov.fj/press/2000_09/2000_09_13-05.shtml (2000-09-13)
# reports that Fiji has discontinued DST.


# Kiribati

# From Paul Eggert (1996-01-22):
# Today's _Wall Street Journal_ (page 1) reports that Kiribati
# "declared it the same day [throughout] the country as of Jan. 1, 1995"
# as part of the competition to be first into the 21st century.

# From Kerry Shetline (2018-02-03):
# December 31 was the day that was skipped, so that the transition
# would be from Friday December 30, 1994 to Sunday January 1, 1995.
# From Paul Eggert (2018-02-04):
# One source for this is page 202 of: Bartky IR. One Time Fits All:
# The Campaigns for Global Uniformity (2007).

# Kanton

# From Paul Eggert (2021-05-27):
# Kiribati's +13 timezone is represented by Kanton, its only populated
# island.  (It was formerly spelled "Canton", but Gilbertese lacks "C".)
# Kanton was settled on 1937-08-31 by two British radio operators
# <https://history.state.gov/historicaldocuments/frus1937v02/d94>;
# Americans came the next year and built an airfield, partly to
# establish airline service and perhaps partly anticipating the
# next war.  Aside from the war, the airfield was used by commercial
# airlines until long-range jets became standard; although currently
# for emergency use only, China says it is considering rebuilding the
# airfield for high-end niche tourism.  Kanton has about two dozen
# people, caretakers who rotate in from the rest of Kiribati in 2-5
# year shifts, and who use some of the leftover structures
# <http://pipa.neaq.org/2012/06/images-of-kanton-island.html>.

# Kwajalein

# From an AP article (1993-08-22):
# "The nearly 3,000 Americans living on this remote Pacific atoll have a good
# excuse for not remembering Saturday night: there wasn't one.  Residents were
# going to bed Friday night and waking up Sunday morning because at midnight
# -- 8 A.M. Eastern daylight time on Saturday -- Kwajalein was jumping from
# one side of the international date line to the other."
# "In Marshall Islands, Friday is followed by Sunday", NY Times. 1993-08-22.
# https://www.nytimes.com/1993/08/22/world/in-marshall-islands-friday-is-followed-by-sunday.html

# From Paul Eggert (2022-03-31):
# Phake Nick (2018-10-27) noted <https://wiki.suikawiki.org/n/南洋群島の標準時>'s
# citation of a 1993 AP article published in the New York Times saying
# Kwajalein synchronized its day with the US mainland about 40 years earlier.
# However the AP article is vague and possibly wrong about this.  The article
# says the earlier switch was "about 40 years ago when the United States
# Army established a missile test range here".  However, the Kwajalein Test
# Center was established on 1960-10-01 and was run by the US Navy.  It was
# transferred to the US Army on 1964-07-01.  See "Seize the High Ground"
# <https://history.army.mil/html/books/070/70-88-1/cmhPub_70-88-1.pdf>.
# Given that Shanks was right on the money about the 1993 change, I'm inclined
# to take Shanks's word for the 1969 change unless we find better evidence.


# N Mariana Is, Guam

# From Phake Nick (2018-10-27):
# Guam Island was briefly annexed by Japan during ... year 1941-1944 ...
# however there are no detailed information about what time it use during that
# period.  It would probably be reasonable to assume Guam use GMT+9 during
# that period of time like the surrounding area.

# From Paul Eggert (2023-01-23):
# Howse writes (p 153) "The Spaniards, on the other hand, reached the
# Philippines and the Ladrones from America," and implies that the Ladrones
# (now called the Marianas) kept American date for quite some time.
# For now, we assume the Ladrones switched at the same time as the Philippines;
# see Asia/Manila.
#
# Use 1941-12-10 and 1944-07-31 for Guam WWII transitions, as the rough start
# and end of Japanese control of Agana.  We don't know whether the Northern
# Marianas followed Guam's DST rules from 1959 through 1977; for now, assume
# they did as that avoids the need for a separate zone due to our 1970 cutoff.
#
# US Public Law 106-564 (2000-12-23) made UT +10 the official standard time,
# under the name "Chamorro standard time".  There is no official abbreviation,
# but Congressman Robert A. Underwood, author of the bill that became law,
# wrote in a press release (2000-12-27) that he will seek the use of "ChST".

# See also the commentary for Micronesia.


# Marshall Is
# See the commentary for Micronesia.


# Micronesia (and nearby)

# From Paul Eggert (2018-11-18):
# Like the Ladrones (see Guam commentary), assume the Spanish East Indies
# kept American time until the Philippines switched at the end of 1844.

# From Paul Eggert (1999-10-29):
# The Federated States of Micronesia Visitors Board writes in
# The Federated States of Micronesia - Visitor Information (1999-01-26)
# http://www.fsmgov.org/info/clocks.html
# that Truk and Yap are UT +10, and Ponape and Kosrae are +11.
# We don't know when Kosrae switched from +12; assume January 1 for now.

# From Phake Nick (2018-10-27):
#
# From a Japanese wiki site https://wiki.suikawiki.org/n/南洋群島の標準時
# ...
# For "Southern Islands" (modern region of Mariana + Palau + Federation of
# Micronesia + Marshall Islands):
#
# A 1906 Japanese magazine shown the Caroline Islands and Mariana Islands
# who was occupied by Germany at the time as GMT+10, together with the like
# of German New Guinea.  However there is a marking saying it have not been
# implemented (yet).  No further information after that were found.
#
# Japan invaded those islands in 1914, and records shows that they were
# instructed to use JST at the time.
#
# 1915 January telecommunication record on the Jaluit Atoll shows they use
# the meridian of 170E as standard time (GMT+11:20), which is similar to the
# longitude of the atoll.
# 1915 February record say the 170E standard time is to be used until
# February 9 noon, and after February 9 noon they are to use JST.
# However these are time used within the Japanese Military at the time and
# probably does not reflect the time used by local resident at the time (that
# is if they keep their own time back then)
#
# In January 1919 the occupying force issued a command that split the area
# into three different timezone with meridian of 135E, 150E, 165E (JST+0, +1,
# +2), and the command was to become effective from February 1 of the same
# year.  Despite the target of the command is still only for the occupying
# force itself, further publication have described the time as the standard
# time for the occupied area and thus it can probably be seen as such.
#  * Area that use meridian of 135E: Palau and Yap civil administration area
#    (Southern Islands Western Standard Time)
#  * Area that use meridian of 150E: Truk (Chuuk) and Saipan civil
#    administration area (Southern Islands Central Standard Time)
#  * Area that use meridian of 165E: Ponape (Pohnpei) and Jaluit civil
#    administration area (Southern Islands Eastern Standard Time).
#  * In the next few years Japanese occupation of those islands have been
#    formalized via League of Nation Mandate (South Pacific Mandate) and formal
#    governance structure have been established, these district [become
#    subprefectures] and timezone classification have been inherited as standard
#    time of the area.
#  * Saipan subprefecture include Mariana islands (exclude Guam which was
#    occupied by America at the time), Palau and Yap subprefecture rule the
#    Western Caroline Islands with 137E longitude as border, Truk and Ponape
#    subprefecture rule the Eastern Caroline Islands with 154E as border, Ponape
#    subprefecture also rule part of Marshall Islands to the west of 164E
#    starting from (1918?) and Jaluit subprefecture rule the rest of the
#    Marshall Islands.
#
# And then in year 1937, an announcement was made to change the time in the
# area into 2 timezones:
#  * Area that use meridian of 135E: area administered by Palau, Yap and
#    Saipan subprefecture (Southern Islands Western Standard Time)
#  * Area that use meridian of 150E: area administered by Truk (Chuuk),
#    Ponape (Pohnpei) and Jaluit subprefecture (Southern Islands Eastern
#    Standard Time)
#
# Another announcement issued in 1941 say that on April 1 that year,
# standard time of the Southern Islands would be changed to use the meridian
# of 135E (GMT+9), and thus abolishing timezone different within the area.
#
# Then Pacific theater of WWII started and Japan slowly lose control on the
# island.  The webpage I linked above contain no information during this
# period of time....
#
# After the end of WWII, in 1946 February, a document written by the
# (former?) Japanese military personnel describe there are 3 hours time
# different between Caroline islands time/Wake island time and the Chungking
# time, which would mean the time being used there at the time was GMT+10.
#
# After that, the area become Trust Territories of the Pacific Islands
# under American administration from year 1947.  The site listed some
# American/International books/maps/publications about time used in those
# area during this period of time but they doesn't seems to be reliable
# information so it would be the best if someone know where can more reliable
# information can be found.
#
#
# From Paul Eggert (2018-11-18):
#
# For the above, use vague dates like "1914" and "1945" for transitions that
# plausibly exist but for which the details are not known.  The information
# for Wake is too sketchy to act on.
#
# The 1906 GMT+10 info about German-controlled islands might not have been
# done, so omit it from the data for now.
#
# The Jaluit info governs Kwajalein.


# Midway

# From Charles T O'Connor, KMTH DJ (1956),
# quoted in the KTMH section of the Radio Heritage Collection
# <http://radiodx.com/spdxr/KMTH.htm> (2002-12-31):
# For the past two months we've been on what is known as Daylight
# Saving Time.  This time has put us on air at 5am in the morning,
# your time down there in New Zealand.  Starting September 2, 1956
# we'll again go back to Standard Time.  This'll mean that we'll go to
# air at 6am your time.
#
# From Paul Eggert (2003-03-23):
# We don't know the date of that quote, but we'll guess they
# started DST on June 3.  Possibly DST was observed other years
# in Midway, but we have no record of it.

# Nauru

# From Phake Nick (2018-10-31):
# Currently, the tz database say Nauru use LMT until 1921, and then
# switched to GMT+11:30 for the next two decades.
# However, a number of timezone map published in America/Japan back then
# showed its timezone as GMT+11 per https://wiki.suikawiki.org/n/ナウルの標準時
# And it would also be nice if the 1921 transition date could be sourced.
# ...
# The "Nauru Standard Time Act 1978 Time Change"
# http://ronlaw.gov.nr/nauru_lpms/files/gazettes/4b23a17d2030150404db7a5fa5872f52.pdf#page=3
# based on "Nauru Standard Time Act 1978 Time Change"
# http://www.paclii.org/nr/legis/num_act/nsta1978207/ defined that "Nauru
# Alternative Time" (GMT+12) should be in effect from 1979 Feb.
#
# From Paul Eggert (2018-11-19):
# The 1921-01-15 introduction of standard time is in Shanks; it is also in
# "Standard Time Throughout the World", US National Bureau of Standards (1935),
# page 3, which does not give the UT offset.  In response to a comment by
# Phake Nick I set the Nauru time of occupation by Japan to
# 1942-08-29/1945-09-08 by using dates from:
# https://en.wikipedia.org/wiki/Japanese_occupation_of_Nauru

# Norfolk

# From Alexander Krivenyshev (2015-09-23):
# Norfolk Island will change ... from +1130 to +1100:
# https://www.comlaw.gov.au/Details/F2015L01483/Explanatory%20Statement/Text
# ... at 12.30 am (by legal time in New South Wales) on 4 October 2015.
# http://www.norfolkisland.gov.nf/nia/MediaRelease/Media%20Release%20Norfolk%20Island%20Standard%20Time%20Change.pdf

# From Paul Eggert (2019-08-28):
# Transitions before 2015 are from timeanddate.com, which consulted
# the Norfolk Island Museum and the Australian Bureau of Meteorology's
# Norfolk Island station, and found no record of Norfolk observing DST
# other than in 1974/5.  See:
# https://www.timeanddate.com/time/australia/norfolk-island.html
# However, disagree with timeanddate about the 1975-03-02 transition;
# timeanddate has 02:00 but 02:00s corresponds to what the NSW law said
# (thanks to Michael Deckers).

# Norfolk started observing Australian DST in spring 2019.
# From Kyle Czech (2019-08-13):
# https://www.legislation.gov.au/Details/F2018L01702
# From Michael Deckers (2019-08-14):
# https://www.legislation.gov.au/Details/F2019C00010

# Palau
# See commentary for Micronesia.

# Pitcairn

# From Rives McDow (1999-11-08):
# A Proclamation was signed by the Governor of Pitcairn on the 27th March 1998
# with regard to Pitcairn Standard Time.  The Proclamation is as follows.
#
#	The local time for general purposes in the Islands shall be
#	Co-ordinated Universal time minus 8 hours and shall be known
#	as Pitcairn Standard Time.
#
# ... I have also seen Pitcairn listed as UTC minus 9 hours in several
# references, and can only assume that this was an error in interpretation
# somehow in light of this proclamation.

# From Rives McDow (1999-11-09):
# The Proclamation regarding Pitcairn time came into effect on 27 April 1998
# ... at midnight.

# From Howie Phelps (1999-11-10), who talked to a Pitcairner via shortwave:
# Betty Christian told me yesterday that their local time is the same as
# Pacific Standard Time. They used to be ½ hour different from us here in
# Sacramento but it was changed a couple of years ago.


# (Western) Samoa and American Samoa

# Howse writes (p 153) that after the 1879 standardization on Antipodean
# time by the British governor of Fiji, the King of Samoa decided to change
# "the date in his kingdom from the Antipodean to the American system,
# ordaining - by a masterpiece of diplomatic flattery - that
# the Fourth of July should be celebrated twice in that year."
# This happened in 1892, according to the Evening News (Sydney) of 1892-07-20.
# https://webspace.science.uu.nl/~gent0113/idl/idl_alaska_samoa.htm

# Although Shanks & Pottenger says they both switched to UT -11:30
# in 1911, and to -11 in 1950. many earlier sources give -11
# for American Samoa, e.g., the US National Bureau of Standards
# circular "Standard Time Throughout the World", 1932.
# Assume American Samoa switched to -11 in 1911, not 1950,
# and that after 1950 they agreed until (western) Samoa skipped a
# day in 2011.  Assume also that the Samoas follow the US and New
# Zealand's "ST"/"DT" style of daylight-saving abbreviations.


# Tonga

# From Paul Eggert (2021-03-04):
# In 1943 "The standard time kept is 12 hrs. 19 min. 12 sec. fast
# on Greenwich mean time." according to the Admiralty's Hydrographic
# Dept., Pacific Islands Pilot, Vol. II, 7th ed., 1943, p 360.

# From Michael Deckers (2021-03-03):
# [Ian R Bartky: "One Time Fits All: The Campaigns for Global Uniformity".
# Stanford University Press. 2007. p. 255]:
# On 10 September 1945 Tonga adopted a standard time 12 hours,
# 20 minutes in advance of Greenwich.

# From Paul Eggert (1996-01-22):
# Today's _Wall Street Journal_ (p 1) reports that "Tonga has been plotting
# to sneak ahead of [New Zealanders] by introducing daylight-saving time."
# Since Kiribati has moved the Date Line it's not clear what Tonga will do.

# Don Mundell writes in the 1997-02-20 Tonga Chronicle
# How Tonga became 'The Land where Time Begins':
# http://www.tongatapu.net.to/tonga/homeland/timebegins.htm
#
# Until 1941 Tonga maintained a standard time 50 minutes ahead of NZST
# 12 hours and 20 minutes ahead of GMT.  When New Zealand adjusted its
# standard time in 1940s, Tonga had the choice of subtracting from its
# local time to come on the same standard time as New Zealand or of
# advancing its time to maintain the differential of 13°
# (approximately 50 minutes ahead of New Zealand time).
#
# Because His Majesty King Tāufaʻāhau Tupou IV, then Crown Prince
# Tungī, preferred to ensure Tonga's title as the land where time
# begins, the Legislative Assembly approved the latter change.
#
# But some of the older, more conservative members from the outer
# islands objected. "If at midnight on Dec. 31, we move ahead 40
# minutes, as your Royal Highness wishes, what becomes of the 40
# minutes we have lost?"
#
# The Crown Prince, presented an unanswerable argument: "Remember that
# on the World Day of Prayer, you would be the first people on Earth
# to say your prayers in the morning."
#
# From Tim Parenti (2021-09-13), per Paul Eggert (2006-03-22) and Michael
# Deckers (2021-03-03):
# Mundell places the transition from +12:20 to +13 in 1941, while Shanks &
# Pottenger say the transition was on 1968-10-01.
#
# The Air Almanac published contemporaneous tables of standard times,
# which listed +12:20 as of Nov 1960 and +13 as of Mar 1961:
#   Nov 1960: https://books.google.com/books?id=bVgtWM6kPZUC&pg=SL1-PA19
#   Mar 1961: https://books.google.com/books?id=W2nItAul4g0C&pg=SL1-PA19
# (Thanks to P Chan for pointing us toward these sources.)
# This agrees with Bartky, who writes that "since 1961 [Tonga's] official time
# has been thirteen hours in advance of Greenwich time" (p. 202) and further
# writes in an endnote that this was because "the legislation was amended" on
# 1960-10-19. (p. 255)
#
# Without greater specificity, presume that Bartky and the Air Almanac point to
# a 1961-01-01 transition, as Tāufaʻāhau Tupou IV was still Crown Prince in
# 1961 and this still jives with the gist of Mundell's telling, and go with
# this over Shanks & Pottenger.

# From Eric Ulevik (1999-05-03):
# Tonga's director of tourism, who is also secretary of the National Millennium
# Committee, has a plan to get Tonga back in front.
# He has proposed a one-off move to tropical daylight saving for Tonga from
# October to March, which has won approval in principle from the Tongan
# Government.

# From Steffen Thorsen (1999-09-09):
# * Tonga will introduce DST in November
#
# I was given this link by John Letts:
# http://news.bbc.co.uk/hi/english/world/asia-pacific/newsid_424000/424764.stm
#
# I have not been able to find exact dates for the transition in November
# yet. By reading this article it seems like Fiji will be 14 hours ahead
# of UTC as well, but as far as I know Fiji will only be 13 hours ahead
# (12 + 1 hour DST).

# From Arthur David Olson (1999-09-20):
# According to <http://www.tongaonline.com/news/sept1799.html>:
# "Daylight Savings Time will take effect on Oct. 2 through April 15, 2000
# and annually thereafter from the first Saturday in October through the
# third Saturday of April.  Under the system approved by Privy Council on
# Sept. 10, clocks must be turned ahead one hour on the opening day and
# set back an hour on the closing date."
# Alas, no indication of the time of day.

# From Rives McDow (1999-10-06):
# Tonga started its Daylight Saving on Saturday morning October 2nd at 0200am.
# Daylight Saving ends on April 16 at 0300am which is Sunday morning.

# From Steffen Thorsen (2000-10-31):
# Back in March I found a notice on the website http://www.tongaonline.com
# that Tonga changed back to standard time one month early, on March 19
# instead of the original reported date April 16. Unfortunately, the article
# is no longer available on the site, and I did not make a copy of the
# text, and I have forgotten to report it here.
# (Original URL was <http://www.tongaonline.com/news/march162000.htm>)

# From Rives McDow (2000-12-01):
# Tonga is observing DST as of 2000-11-04 and will stop on 2001-01-27.

# From Sione Moala-Mafi (2001-09-20) via Rives McDow:
# At 2:00am on the first Sunday of November, the standard time in the Kingdom
# shall be moved forward by one hour to 3:00am.  At 2:00am on the last Sunday
# of January the standard time in the Kingdom shall be moved backward by one
# hour to 1:00am.

# From Pulu ʻAnau (2002-11-05):
# The law was for 3 years, supposedly to get renewed.  It wasn't.

# From Pulu ʻAnau (2016-10-27):
# http://mic.gov.to/news-today/press-releases/6375-daylight-saving-set-to-run-from-6-november-2016-to-15-january-2017
# Cannot find anyone who knows the rules, has seen the duration or has seen
# the cabinet decision, but it appears we are following Fiji's rule set.
#
# From Tim Parenti (2016-10-26):
# Assume Tonga will observe DST from the first Sunday in November at 02:00
# through the third Sunday in January at 03:00, like Fiji, for now.

# From David Wade (2017-10-18):
# In August government was dissolved by the King.  The current prime minister
# continued in office in care taker mode.  It is easy to see that few
# decisions will be made until elections 16th November.
#
# From Paul Eggert (2017-10-18):
# For now, guess that DST is discontinued.  That's what the IATA is guessing.


###############################################################################

# The International Date Line

# From Gwillim Law (2000-01-03):
#
# The International Date Line is not defined by any international standard,
# convention, or treaty.  Mapmakers are free to draw it as they please.
# Reputable mapmakers will simply ensure that every point of land appears on
# the correct side of the IDL, according to the date legally observed there.
#
# When Kiribati adopted a uniform date in 1995, thereby moving the Phoenix and
# Line Islands to the west side of the IDL (or, if you prefer, moving the IDL
# to the east side of the Phoenix and Line Islands), I suppose that most
# mapmakers redrew the IDL following the boundary of Kiribati.  Even that line
# has a rather arbitrary nature.  The straight-line boundaries between Pacific
# island nations that are shown on many maps are based on an international
# convention, but are not legally binding national borders.... The date is
# governed by the IDL; therefore, even on the high seas, there may be some
# places as late as fourteen hours later than UTC.  And, since the IDL is not
# an international standard, there are some places on the high seas where the
# correct date is ambiguous.

# From Wikipedia <https://en.wikipedia.org/wiki/Nautical_time> (2023-01-23):
# The nautical time zone system is analogous to the terrestrial time zone
# system for use on high seas.  Under the system time changes are required for
# changes of longitude in one-hour steps.  The one-hour step corresponds to a
# time zone width of 15° longitude.  The 15° gore that is offset from GMT or
# UT1 (not UTC) by twelve hours is bisected by the nautical date line into two
# 7°30' gores that differ from GMT by ±12 hours.  A nautical date line is
# implied but not explicitly drawn on time zone maps.  It follows the 180th
# meridian except where it is interrupted by territorial waters adjacent to
# land, forming gaps: it is a pole-to-pole dashed line.

# From Paul Eggert (2023-01-23):
# The American Practical Navigator <https://msi.nga.mil/Publications/APN>,
# 2019 edition, merely says that the International Date Line
# "coincides with the 180th meridian over most of its length."
# Links and zones for backward compatibility

# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.

# This file provides links from old or merged timezone names to current ones.
# It also provides a few zone entries for old naming conventions.
# Many names changed in 1993 and in 1995, and many merged names moved here
# in the period from 2013 through 2022.  Several of these names are
# also present in the file 'backzone', which has data important only
# for pre-1970 timestamps and so is out of scope for tzdb proper.

# Although this file is optional and tzdb will work if you omit it by
# building with 'make BACKWARD=', in practice downstream users
# typically use this file for backward compatibility.

# This file is divided into sections, one for each major reason for a
# backward compatibility link.  Each section is sorted by link name.

# A "#= TARGET1" comment labels each link inserted only because some
# .zi parsers (including tzcode through 2022e) mishandle links to links.
# The comment says what the target would be if these parsers were fixed
# so that data could contain links to links.  For example, the line
# "Link Australia/Sydney Australia/ACT #= Australia/Canberra" would be
# "Link Australia/Canberra Australia/ACT" were it not that data lines
# refrain from linking to links like Australia/Canberra, which means
# the Australia/ACT line links instead to Australia/Sydney,
# Australia/Canberra's target.


# Pre-1993 naming conventions

# Link	TARGET			LINK-NAME	#= TARGET1
Link	Australia/Sydney	Australia/ACT	#= Australia/Canberra
Link	Australia/Lord_Howe	Australia/LHI
Link	Australia/Sydney	Australia/NSW
Link	Australia/Darwin	Australia/North
Link	Australia/Brisbane	Australia/Queensland
Link	Australia/Adelaide	Australia/South
Link	Australia/Hobart	Australia/Tasmania
Link	Australia/Melbourne	Australia/Victoria
Link	Australia/Perth		Australia/West
Link	Australia/Broken_Hill	Australia/Yancowinna
Link	America/Rio_Branco	Brazil/Acre	#= America/Porto_Acre
Link	America/Noronha		Brazil/DeNoronha
Link	America/Sao_Paulo	Brazil/East
Link	America/Manaus		Brazil/West
Link	Europe/Brussels		CET
Link	America/Chicago		CST6CDT
Link	America/Halifax		Canada/Atlantic
Link	America/Winnipeg	Canada/Central
# This line is commented out, as the name exceeded the 14-character limit
# and was an unused misnomer.
#Link	America/Regina		Canada/East-Saskatchewan
Link	America/Toronto		Canada/Eastern
Link	America/Edmonton	Canada/Mountain
Link	America/St_Johns	Canada/Newfoundland
Link	America/Vancouver	Canada/Pacific
Link	America/Regina		Canada/Saskatchewan
Link	America/Whitehorse	Canada/Yukon
Link	America/Santiago	Chile/Continental
Link	Pacific/Easter		Chile/EasterIsland
Link	America/Havana		Cuba
Link	Europe/Athens		EET
Link	America/Panama		EST
Link	America/New_York	EST5EDT
Link	Africa/Cairo		Egypt
Link	Europe/Dublin		Eire
# Vanguard section, for most .zi parsers.
#Link	GMT			Etc/GMT
#Link	GMT			Etc/GMT+0
#Link	GMT			Etc/GMT-0
#Link	GMT			Etc/GMT0
#Link	GMT			Etc/Greenwich
# Rearguard section, for TZUpdater 2.3.2 and earlier.
Link	Etc/GMT			Etc/GMT+0
Link	Etc/GMT			Etc/GMT-0
Link	Etc/GMT			Etc/GMT0
Link	Etc/GMT			Etc/Greenwich
# End of rearguard section.
Link	Etc/UTC			Etc/UCT
Link	Etc/UTC			Etc/Universal
Link	Etc/UTC			Etc/Zulu
Link	Europe/London		GB
Link	Europe/London		GB-Eire
# Vanguard section, for most .zi parsers.
#Link	GMT			GMT+0
#Link	GMT			GMT-0
#Link	GMT			GMT0
#Link	GMT			Greenwich
# Rearguard section, for TZUpdater 2.3.2 and earlier.
Link	Etc/GMT			GMT+0
Link	Etc/GMT			GMT-0
Link	Etc/GMT			GMT0
Link	Etc/GMT			Greenwich
# End of rearguard section.
Link	Asia/Hong_Kong		Hongkong
Link	Africa/Abidjan		Iceland	#= Atlantic/Reykjavik
Link	Asia/Tehran		Iran
Link	Asia/Jerusalem		Israel
Link	America/Jamaica		Jamaica
Link	Asia/Tokyo		Japan
Link	Pacific/Kwajalein	Kwajalein
Link	Africa/Tripoli		Libya
Link	Europe/Brussels		MET
Link	America/Phoenix		MST
Link	America/Denver		MST7MDT
Link	America/Tijuana		Mexico/BajaNorte
Link	America/Mazatlan	Mexico/BajaSur
Link	America/Mexico_City	Mexico/General
Link	Pacific/Auckland	NZ
Link	Pacific/Chatham		NZ-CHAT
Link	America/Denver		Navajo	#= America/Shiprock
Link	Asia/Shanghai		PRC
Link	Europe/Warsaw		Poland
Link	Europe/Lisbon		Portugal
Link	Asia/Taipei		ROC
Link	Asia/Seoul		ROK
Link	Asia/Singapore		Singapore
Link	Europe/Istanbul		Turkey
Link	Etc/UTC			UCT
Link	America/Anchorage	US/Alaska
Link	America/Adak		US/Aleutian
Link	America/Phoenix		US/Arizona
Link	America/Chicago		US/Central
Link	America/Indiana/Indianapolis	US/East-Indiana
Link	America/New_York	US/Eastern
Link	Pacific/Honolulu	US/Hawaii
Link	America/Indiana/Knox	US/Indiana-Starke
Link	America/Detroit		US/Michigan
Link	America/Denver		US/Mountain
Link	America/Los_Angeles	US/Pacific
Link	Pacific/Pago_Pago	US/Samoa
Link	Etc/UTC			UTC
Link	Etc/UTC			Universal
Link	Europe/Moscow		W-SU
Link	Etc/UTC			Zulu


# Two-part names that were renamed mostly to three-part names in 1995

# Link	TARGET				LINK-NAME	#= TARGET1
Link	America/Argentina/Buenos_Aires	America/Buenos_Aires
Link	America/Argentina/Catamarca	America/Catamarca
Link	America/Argentina/Cordoba	America/Cordoba
Link	America/Indiana/Indianapolis	America/Indianapolis
Link	America/Argentina/Jujuy		America/Jujuy
Link	America/Indiana/Knox		America/Knox_IN
Link	America/Kentucky/Louisville	America/Louisville
Link	America/Argentina/Mendoza	America/Mendoza
Link	America/Puerto_Rico		America/Virgin	#= America/St_Thomas
Link	Pacific/Pago_Pago		Pacific/Samoa


# Pre-2013 practice, which typically had a Zone per zone.tab line

# Link	TARGET			LINK-NAME
Link	Africa/Abidjan		Africa/Accra
Link	Africa/Nairobi		Africa/Addis_Ababa
Link	Africa/Nairobi		Africa/Asmara
Link	Africa/Abidjan		Africa/Bamako
Link	Africa/Lagos		Africa/Bangui
Link	Africa/Abidjan		Africa/Banjul
Link	Africa/Maputo		Africa/Blantyre
Link	Africa/Lagos		Africa/Brazzaville
Link	Africa/Maputo		Africa/Bujumbura
Link	Africa/Abidjan		Africa/Conakry
Link	Africa/Abidjan		Africa/Dakar
Link	Africa/Nairobi		Africa/Dar_es_Salaam
Link	Africa/Nairobi		Africa/Djibouti
Link	Africa/Lagos		Africa/Douala
Link	Africa/Abidjan		Africa/Freetown
Link	Africa/Maputo		Africa/Gaborone
Link	Africa/Maputo		Africa/Harare
Link	Africa/Nairobi		Africa/Kampala
Link	Africa/Maputo		Africa/Kigali
Link	Africa/Lagos		Africa/Kinshasa
Link	Africa/Lagos		Africa/Libreville
Link	Africa/Abidjan		Africa/Lome
Link	Africa/Lagos		Africa/Luanda
Link	Africa/Maputo		Africa/Lubumbashi
Link	Africa/Maputo		Africa/Lusaka
Link	Africa/Lagos		Africa/Malabo
Link	Africa/Johannesburg	Africa/Maseru
Link	Africa/Johannesburg	Africa/Mbabane
Link	Africa/Nairobi		Africa/Mogadishu
Link	Africa/Lagos		Africa/Niamey
Link	Africa/Abidjan		Africa/Nouakchott
Link	Africa/Abidjan		Africa/Ouagadougou
Link	Africa/Lagos		Africa/Porto-Novo
Link	America/Puerto_Rico	America/Anguilla
Link	America/Puerto_Rico	America/Antigua
Link	America/Puerto_Rico	America/Aruba
Link	America/Panama		America/Atikokan
Link	America/Puerto_Rico	America/Blanc-Sablon
Link	America/Panama		America/Cayman
Link	America/Phoenix		America/Creston
Link	America/Puerto_Rico	America/Curacao
Link	America/Puerto_Rico	America/Dominica
Link	America/Puerto_Rico	America/Grenada
Link	America/Puerto_Rico	America/Guadeloupe
Link	America/Puerto_Rico	America/Kralendijk
Link	America/Puerto_Rico	America/Lower_Princes
Link	America/Puerto_Rico	America/Marigot
Link	America/Puerto_Rico	America/Montserrat
Link	America/Toronto		America/Nassau
Link	America/Puerto_Rico	America/Port_of_Spain
Link	America/Puerto_Rico	America/St_Barthelemy
Link	America/Puerto_Rico	America/St_Kitts
Link	America/Puerto_Rico	America/St_Lucia
Link	America/Puerto_Rico	America/St_Thomas
Link	America/Puerto_Rico	America/St_Vincent
Link	America/Puerto_Rico	America/Tortola
Link	Pacific/Port_Moresby	Antarctica/DumontDUrville
Link	Pacific/Auckland	Antarctica/McMurdo
Link	Asia/Riyadh		Antarctica/Syowa
Link	Europe/Berlin		Arctic/Longyearbyen
Link	Asia/Riyadh		Asia/Aden
Link	Asia/Qatar		Asia/Bahrain
Link	Asia/Kuching		Asia/Brunei
Link	Asia/Singapore		Asia/Kuala_Lumpur
Link	Asia/Riyadh		Asia/Kuwait
Link	Asia/Dubai		Asia/Muscat
Link	Asia/Bangkok		Asia/Phnom_Penh
Link	Asia/Bangkok		Asia/Vientiane
Link	Africa/Abidjan		Atlantic/Reykjavik
Link	Africa/Abidjan		Atlantic/St_Helena
Link	Europe/Brussels		Europe/Amsterdam
Link	Europe/Prague		Europe/Bratislava
Link	Europe/Zurich		Europe/Busingen
Link	Europe/Berlin		Europe/Copenhagen
Link	Europe/London		Europe/Guernsey
Link	Europe/London		Europe/Isle_of_Man
Link	Europe/London		Europe/Jersey
Link	Europe/Belgrade		Europe/Ljubljana
Link	Europe/Brussels		Europe/Luxembourg
Link	Europe/Helsinki		Europe/Mariehamn
Link	Europe/Paris		Europe/Monaco
Link	Europe/Berlin		Europe/Oslo
Link	Europe/Belgrade		Europe/Podgorica
Link	Europe/Rome		Europe/San_Marino
Link	Europe/Belgrade		Europe/Sarajevo
Link	Europe/Belgrade		Europe/Skopje
Link	Europe/Berlin		Europe/Stockholm
Link	Europe/Zurich		Europe/Vaduz
Link	Europe/Rome		Europe/Vatican
Link	Europe/Belgrade		Europe/Zagreb
Link	Africa/Nairobi		Indian/Antananarivo
Link	Asia/Bangkok		Indian/Christmas
Link	Asia/Yangon		Indian/Cocos
Link	Africa/Nairobi		Indian/Comoro
Link	Indian/Maldives		Indian/Kerguelen
Link	Asia/Dubai		Indian/Mahe
Link	Africa/Nairobi		Indian/Mayotte
Link	Asia/Dubai		Indian/Reunion
Link	Pacific/Port_Moresby	Pacific/Chuuk
Link	Pacific/Tarawa		Pacific/Funafuti
Link	Pacific/Tarawa		Pacific/Majuro
Link	Pacific/Pago_Pago	Pacific/Midway
Link	Pacific/Guadalcanal	Pacific/Pohnpei
Link	Pacific/Guam		Pacific/Saipan
Link	Pacific/Tarawa		Pacific/Wake
Link	Pacific/Tarawa		Pacific/Wallis


# Non-zone.tab locations with timestamps since 1970 that duplicate
# those of an existing location

# Link	TARGET			LINK-NAME
Link	Africa/Abidjan		Africa/Timbuktu
Link	America/Argentina/Catamarca	America/Argentina/ComodRivadavia
Link	America/Adak		America/Atka
Link	America/Panama		America/Coral_Harbour
Link	America/Tijuana		America/Ensenada
Link	America/Indiana/Indianapolis	America/Fort_Wayne
Link	America/Toronto		America/Montreal
Link	America/Toronto		America/Nipigon
Link	America/Iqaluit		America/Pangnirtung
Link	America/Rio_Branco	America/Porto_Acre
Link	America/Winnipeg	America/Rainy_River
Link	America/Argentina/Cordoba	America/Rosario
Link	America/Tijuana		America/Santa_Isabel
Link	America/Denver		America/Shiprock
Link	America/Toronto		America/Thunder_Bay
Link	America/Edmonton	America/Yellowknife
Link	Pacific/Auckland	Antarctica/South_Pole
Link	Asia/Ulaanbaatar	Asia/Choibalsan
Link	Asia/Shanghai		Asia/Chongqing
Link	Asia/Shanghai		Asia/Harbin
Link	Asia/Urumqi		Asia/Kashgar
Link	Asia/Jerusalem		Asia/Tel_Aviv
Link	Europe/Berlin		Atlantic/Jan_Mayen
Link	Australia/Sydney	Australia/Canberra
Link	Australia/Hobart	Australia/Currie
Link	Europe/London		Europe/Belfast
Link	Europe/Chisinau		Europe/Tiraspol
Link	Europe/Kyiv		Europe/Uzhgorod
Link	Europe/Kyiv		Europe/Zaporozhye
Link	Pacific/Kanton		Pacific/Enderbury
Link	Pacific/Honolulu	Pacific/Johnston
Link	Pacific/Port_Moresby	Pacific/Yap
Link	Europe/Lisbon		WET


# Alternate names for the same location

# Link	TARGET			LINK-NAME	#= TARGET1
Link	Africa/Nairobi		Africa/Asmera	#= Africa/Asmara
Link	America/Nuuk		America/Godthab
Link	Asia/Ashgabat		Asia/Ashkhabad
Link	Asia/Kolkata		Asia/Calcutta
Link	Asia/Shanghai		Asia/Chungking	#= Asia/Chongqing
Link	Asia/Dhaka		Asia/Dacca
# Istanbul is in both continents.
Link	Europe/Istanbul		Asia/Istanbul
Link	Asia/Kathmandu		Asia/Katmandu
Link	Asia/Macau		Asia/Macao
Link	Asia/Yangon		Asia/Rangoon
Link	Asia/Ho_Chi_Minh	Asia/Saigon
Link	Asia/Thimphu		Asia/Thimbu
Link	Asia/Makassar		Asia/Ujung_Pandang
Link	Asia/Ulaanbaatar	Asia/Ulan_Bator
Link	Atlantic/Faroe		Atlantic/Faeroe
Link	Europe/Kyiv		Europe/Kiev
# Classically, Cyprus is in Asia; e.g. see Herodotus, Histories, I.72.
# However, for various reasons many users expect to find it under Europe.
Link	Asia/Nicosia		Europe/Nicosia
Link	Pacific/Honolulu	HST
Link	America/Los_Angeles	PST8PDT
Link	Pacific/Guadalcanal	Pacific/Ponape	#= Pacific/Pohnpei
Link	Pacific/Port_Moresby	Pacific/Truk	#= Pacific/Chuuk
#
# Copyright (c) 2001 by Sun Microsystems, Inc.
# All rights reserved.
#
Africa	Africa
America	Americas
Antarctica	Antarctica
Arctic	Arctic Ocean
Asia	Asia
Atlantic	Atlantic Ocean
Australia	Australia
Europe	Europe
Indian	Indian Ocean
Pacific	Pacific Ocean
# ISO 3166 alpha-2 country codes
#
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
#
# From Paul Eggert (2023-09-06):
# This file contains a table of two-letter country codes.  Columns are
# separated by a single tab.  Lines beginning with '#' are comments.
# All text uses UTF-8 encoding.  The columns of the table are as follows:
#
# 1.  ISO 3166-1 alpha-2 country code, current as of
#     ISO/TC 46 N1108 (2023-04-05).  See: ISO/TC 46 Documents
#     https://www.iso.org/committee/48750.html?view=documents
# 2.  The usual English name for the coded region.  This sometimes
#     departs from ISO-listed names, sometimes so that sorted subsets
#     of names are useful (e.g., "Samoa (American)" and "Samoa
#     (western)" rather than "American Samoa" and "Samoa"),
#     sometimes to avoid confusion among non-experts (e.g.,
#     "Czech Republic" and "Turkey" rather than "Czechia" and "Türkiye"),
#     and sometimes to omit needless detail or churn (e.g., "Netherlands"
#     rather than "Netherlands (the)" or "Netherlands (Kingdom of the)").
#
# The table is sorted by country code.
#
# This table is intended as an aid for users, to help them select time
# zone data appropriate for their practical needs.  It is not intended
# to take or endorse any position on legal or territorial claims.
#
#country-
#code	name of country, territory, area, or subdivision
AD	Andorra
AE	United Arab Emirates
AF	Afghanistan
AG	Antigua & Barbuda
AI	Anguilla
AL	Albania
AM	Armenia
AO	Angola
AQ	Antarctica
AR	Argentina
AS	Samoa (American)
AT	Austria
AU	Australia
AW	Aruba
AX	Åland Islands
AZ	Azerbaijan
BA	Bosnia & Herzegovina
BB	Barbados
BD	Bangladesh
BE	Belgium
BF	Burkina Faso
BG	Bulgaria
BH	Bahrain
BI	Burundi
BJ	Benin
BL	St Barthelemy
BM	Bermuda
BN	Brunei
BO	Bolivia
BQ	Caribbean NL
BR	Brazil
BS	Bahamas
BT	Bhutan
BV	Bouvet Island
BW	Botswana
BY	Belarus
BZ	Belize
CA	Canada
CC	Cocos (Keeling) Islands
CD	Congo (Dem. Rep.)
CF	Central African Rep.
CG	Congo (Rep.)
CH	Switzerland
CI	Côte d'Ivoire
CK	Cook Islands
CL	Chile
CM	Cameroon
CN	China
CO	Colombia
CR	Costa Rica
CU	Cuba
CV	Cape Verde
CW	Curaçao
CX	Christmas Island
CY	Cyprus
CZ	Czech Republic
DE	Germany
DJ	Djibouti
DK	Denmark
DM	Dominica
DO	Dominican Republic
DZ	Algeria
EC	Ecuador
EE	Estonia
EG	Egypt
EH	Western Sahara
ER	Eritrea
ES	Spain
ET	Ethiopia
FI	Finland
FJ	Fiji
FK	Falkland Islands
FM	Micronesia
FO	Faroe Islands
FR	France
GA	Gabon
GB	Britain (UK)
GD	Grenada
GE	Georgia
GF	French Guiana
GG	Guernsey
GH	Ghana
GI	Gibraltar
GL	Greenland
GM	Gambia
GN	Guinea
GP	Guadeloupe
GQ	Equatorial Guinea
GR	Greece
GS	South Georgia & the South Sandwich Islands
GT	Guatemala
GU	Guam
GW	Guinea-Bissau
GY	Guyana
HK	Hong Kong
HM	Heard Island & McDonald Islands
HN	Honduras
HR	Croatia
HT	Haiti
HU	Hungary
ID	Indonesia
IE	Ireland
IL	Israel
IM	Isle of Man
IN	India
IO	British Indian Ocean Territory
IQ	Iraq
IR	Iran
IS	Iceland
IT	Italy
JE	Jersey
JM	Jamaica
JO	Jordan
JP	Japan
KE	Kenya
KG	Kyrgyzstan
KH	Cambodia
KI	Kiribati
KM	Comoros
KN	St Kitts & Nevis
KP	Korea (North)
KR	Korea (South)
KW	Kuwait
KY	Cayman Islands
KZ	Kazakhstan
LA	Laos
LB	Lebanon
LC	St Lucia
LI	Liechtenstein
LK	Sri Lanka
LR	Liberia
LS	Lesotho
LT	Lithuania
LU	Luxembourg
LV	Latvia
LY	Libya
MA	Morocco
MC	Monaco
MD	Moldova
ME	Montenegro
MF	St Martin (French)
MG	Madagascar
MH	Marshall Islands
MK	North Macedonia
ML	Mali
MM	Myanmar (Burma)
MN	Mongolia
MO	Macau
MP	Northern Mariana Islands
MQ	Martinique
MR	Mauritania
MS	Montserrat
MT	Malta
MU	Mauritius
MV	Maldives
MW	Malawi
MX	Mexico
MY	Malaysia
MZ	Mozambique
NA	Namibia
NC	New Caledonia
NE	Niger
NF	Norfolk Island
NG	Nigeria
NI	Nicaragua
NL	Netherlands
NO	Norway
NP	Nepal
NR	Nauru
NU	Niue
NZ	New Zealand
OM	Oman
PA	Panama
PE	Peru
PF	French Polynesia
PG	Papua New Guinea
PH	Philippines
PK	Pakistan
PL	Poland
PM	St Pierre & Miquelon
PN	Pitcairn
PR	Puerto Rico
PS	Palestine
PT	Portugal
PW	Palau
PY	Paraguay
QA	Qatar
RE	Réunion
RO	Romania
RS	Serbia
RU	Russia
RW	Rwanda
SA	Saudi Arabia
SB	Solomon Islands
SC	Seychelles
SD	Sudan
SE	Sweden
SG	Singapore
SH	St Helena
SI	Slovenia
SJ	Svalbard & Jan Mayen
SK	Slovakia
SL	Sierra Leone
SM	San Marino
SN	Senegal
SO	Somalia
SR	Suriname
SS	South Sudan
ST	Sao Tome & Principe
SV	El Salvador
SX	St Maarten (Dutch)
SY	Syria
SZ	Eswatini (Swaziland)
TC	Turks & Caicos Is
TD	Chad
TF	French S. Terr.
TG	Togo
TH	Thailand
TJ	Tajikistan
TK	Tokelau
TL	East Timor
TM	Turkmenistan
TN	Tunisia
TO	Tonga
TR	Turkey
TT	Trinidad & Tobago
TV	Tuvalu
TW	Taiwan
TZ	Tanzania
UA	Ukraine
UG	Uganda
UM	US minor outlying islands
US	United States
UY	Uruguay
UZ	Uzbekistan
VA	Vatican City
VC	St Vincent
VE	Venezuela
VG	Virgin Islands (UK)
VI	Virgin Islands (US)
VN	Vietnam
VU	Vanuatu
WF	Wallis & Futuna
WS	Samoa (western)
YE	Yemen
YT	Mayotte
ZA	South Africa
ZM	Zambia
ZW	Zimbabwe
#! /bin/sh
#
# Copyright (c) 2001 by Sun Microsystems, Inc.
# All rights reserved.
#

#
# Create messages file for zone_sun.tab, country.tab, continent.tab
#
AWK=/usr/bin/nawk
ECHO=/bin/echo

ZONE_SUN_FILE=zone_sun.tab
COUNTRY_FILE=country.tab
CONTINENT_FILE=continent.tab

DOMAIN=SUNW_OST_ZONEINFO

$ECHO "domain \"$DOMAIN\""

$ECHO "#"
$ECHO "# These files are located in usr/src/data/zoneinfo"
$ECHO "#"

$ECHO "#"
$ECHO "# continent.tab"
$ECHO "#"

# Get 2nd column of continent.tab file
$AWK -F'\t' \
	'
	/^#/ { next }
	{
		printf "msgid \"%s\"\n", $2
		printf "msgstr \"\"\n"
	}
	' < $CONTINENT_FILE

$ECHO "#"
$ECHO "# country.tab"
$ECHO "#"

# Get 2nd column of country.tab file
$AWK -F'\t' \
	'
	/^#/ { next }
	{
		printf "msgid \"%s\"\n", $2
		printf "msgstr \"\"\n"
	}
	' < $COUNTRY_FILE


$ECHO "#"
$ECHO "# zone.tab"
$ECHO "#"

# Get 5th column (if it exists) of zone_sun.tab file
$AWK -F'\t' \
	'
	/^#/ { next }
	{
		if (NF > 4) {
			printf "msgid \"%s\"\n", $5
			printf "msgstr \"\"\n"
		}
	}
	' < $ZONE_SUN_FILE
# tzdb data for ships at sea and other miscellany

# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.

# These entries are for uses not otherwise covered by the tz database.
# Their main practical use is for platforms like Android that lack
# support for POSIX proleptic TZ strings.  On such platforms these entries
# can be useful if the timezone database is wrong or if a ship or
# aircraft at sea is not in a timezone.

# Starting with POSIX 1003.1-2001, the entries below are all
# unnecessary as settings for the TZ environment variable.  E.g.,
# instead of TZ='Etc/GMT+4' one can use the POSIX setting TZ='<-04>+4'.
#
# Do not use a POSIX TZ setting like TZ='GMT+4', which is four hours
# behind GMT but uses the completely misleading abbreviation "GMT".

# The following zone is used by tzcode functions like gmtime,
# which load the "UTC" file to handle seconds properly.
Zone	Etc/UTC		0	-	UTC

# Functions like gmtime load the "GMT" file to handle leap seconds properly.
# Vanguard section, which works with most .zi parsers.
#Zone	GMT		0	-	GMT
# Rearguard section, for TZUpdater 2.3.2 and earlier.
Zone	Etc/GMT		0	-	GMT

# The following link uses older naming conventions,
# but it belongs here, not in the file 'backward',
# as it is needed for tzcode releases through 2022a,
# where functions like gmtime load "GMT" instead of the "Etc/UTC".
# We want this to work even on installations that omit 'backward'.
Link	Etc/GMT				GMT
# End of rearguard section.

# Be consistent with POSIX TZ settings in the Zone names,
# even though this is the opposite of what many people expect.
# POSIX has positive signs west of Greenwich, but many people expect
# positive signs east of Greenwich.  For example, TZ='Etc/GMT+4' uses
# the abbreviation "-04" and corresponds to 4 hours behind UT
# (i.e. west of Greenwich) even though many people would expect it to
# mean 4 hours ahead of UT (i.e. east of Greenwich).

# Earlier incarnations of this package were not POSIX-compliant,
# and had lines such as
#		Zone	GMT-12		-12	-	GMT-1200
# We did not want things to change quietly if someone accustomed to the old
# way does a
#		zic -l GMT-12
# so we moved the names into the Etc subdirectory.
# Also, the time zone abbreviations are now compatible with %z.

# There is no "Etc/Unknown" entry, as CLDR says that "Etc/Unknown"
# corresponds to an unknown or invalid time zone, and things would get
# confusing if Etc/Unknown were made valid here.

Zone	Etc/GMT-14	14	-	%z
Zone	Etc/GMT-13	13	-	%z
Zone	Etc/GMT-12	12	-	%z
Zone	Etc/GMT-11	11	-	%z
Zone	Etc/GMT-10	10	-	%z
Zone	Etc/GMT-9	9	-	%z
Zone	Etc/GMT-8	8	-	%z
Zone	Etc/GMT-7	7	-	%z
Zone	Etc/GMT-6	6	-	%z
Zone	Etc/GMT-5	5	-	%z
Zone	Etc/GMT-4	4	-	%z
Zone	Etc/GMT-3	3	-	%z
Zone	Etc/GMT-2	2	-	%z
Zone	Etc/GMT-1	1	-	%z
Zone	Etc/GMT+1	-1	-	%z
Zone	Etc/GMT+2	-2	-	%z
Zone	Etc/GMT+3	-3	-	%z
Zone	Etc/GMT+4	-4	-	%z
Zone	Etc/GMT+5	-5	-	%z
Zone	Etc/GMT+6	-6	-	%z
Zone	Etc/GMT+7	-7	-	%z
Zone	Etc/GMT+8	-8	-	%z
Zone	Etc/GMT+9	-9	-	%z
Zone	Etc/GMT+10	-10	-	%z
Zone	Etc/GMT+11	-11	-	%z
Zone	Etc/GMT+12	-12	-	%z
# tzdb data for Europe and environs

# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.

# This file is by no means authoritative; if you think you know better,
# go ahead and edit the file (and please send any changes to
# tz@iana.org for general use in the future).  For more, please see
# the file CONTRIBUTING in the tz distribution.

# From Paul Eggert (2017-02-10):
#
# Unless otherwise specified, the source for data through 1990 is:
# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
# San Diego: ACS Publications, Inc. (2003).
# Unfortunately this book contains many errors and cites no sources.
#
# Many years ago Gwillim Law wrote that a good source
# for time zone data was the International Air Transport
# Association's Standard Schedules Information Manual (IATA SSIM),
# published semiannually.  Law sent in several helpful summaries
# of the IATA's data after 1990.  Except where otherwise noted,
# IATA SSIM is the source for entries after 1990.
#
# A reliable and entertaining source about time zones is
# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
#
# Except where otherwise noted, Shanks & Pottenger is the source for
# entries through 1991, and IATA SSIM is the source for entries afterwards.
#
# Other sources occasionally used include:
#
#	Edward W. Whitman, World Time Differences,
#	Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
#	which I found in the UCLA library.
#
#	William Willett, The Waste of Daylight, 19th edition
#	<http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
#	[PDF] (1914-03)
#
#	Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
#	<https://www.jstor.org/stable/1774359>.  He writes:
#	"It is requested that corrections and additions to these tables
#	may be sent to Mr. John Milne, Royal Geographical Society,
#	Savile Row, London."  Nowadays please email them to tz@iana.org.
#
#	Byalokoz EL. New Counting of Time in Russia since July 1, 1919.
#	This Russian-language source was consulted by Vladimir Karpinsky; see
#	https://mm.icann.org/pipermail/tz/2014-August/021320.html
#	The full Russian citation is:
#	Бялокоз, Евгений Людвигович. Новый счет времени в течении суток
#	введенный декретом Совета народных комиссаров для всей России с 1-го
#	июля 1919 г. / Изд. 2-е Междуведомственной комиссии. - Петроград:
#	Десятая гос. тип., 1919.
#	http://resolver.gpntb.ru/purl?docushare/dsweb/Get/Resource-2011/Byalokoz__E.L.__Novyy__schet__vremeni__v__techenie__sutok__izd__2(1).pdf
#
#	Brazil's Divisão Serviço da Hora (DSHO),
#	History of Summer Time
#	<http://pcdsh01.on.br/HISTHV.htm>
#	(1998-09-21, in Portuguese)
#
# I invented the abbreviations marked '*' in the following table;
# the rest are variants of the "xMT" pattern for a city's mean time,
# or are from other sources.  Corrections are welcome!
#                   std  dst  2dst
#                   LMT             Local Mean Time
#       -4:00       AST  ADT        Atlantic
#        0:00       GMT  BST  BDST  Greenwich, British Summer
#        0:00       GMT  IST        Greenwich, Irish Summer
#        0:00       WET  WEST WEMT  Western Europe
#        1:00       BST             British Standard (1968-1971)
#        1:00       IST  GMT        Irish Standard (1968-) with winter DST
#        1:00       CET  CEST CEMT  Central Europe
#        1:00:14    SET             Swedish (1879-1899)
#        1:36:34    RMT* LST*       Riga, Latvian Summer (1880-1926)*
#        2:00       EET  EEST       Eastern Europe
#        3:00       MSK  MSD  MDST* Moscow

# From Peter Ilieve (1994-12-04), re EEC/EC/EU members:
# The original six: Belgium, France, (West) Germany, Italy,
# Luxembourg, the Netherlands.
# Plus, from 1 Jan 73: Denmark, Ireland, United Kingdom.
# Plus, from 1 Jan 81: Greece.
# Plus, from 1 Jan 86: Spain, Portugal.
# Plus, from 1 Jan 95: Austria, Finland, Sweden. (Norway negotiated terms for
# entry but in a referendum on 28 Nov 94 the people voted No by 52.2% to 47.8%
# on a turnout of 88.6%. This was almost the same result as Norway's previous
# referendum in 1972, they are the only country to have said No twice.
# Referendums in the other three countries voted Yes.)
# ...
# Estonia ... uses EU dates but not at 01:00 GMT, they use midnight GMT.
# I don't think they know yet what they will do from 1996 onwards.
# ...
# There shouldn't be any [current members who are not using EU rules].
# A Directive has the force of law, member states are obliged to enact
# national law to implement it. The only contentious issue was the
# different end date for the UK and Ireland, and this was always allowed
# in the Directive.


###############################################################################

# Britain (United Kingdom) and Ireland (Eire)

# From Peter Ilieve (1994-07-06):
#
# On 17 Jan 1994 the Independent, a UK quality newspaper, had a piece about
# historical vistas along the Thames in west London. There was a photo
# and a sketch map showing some of the sightlines involved. One paragraph
# of the text said:
#
# 'An old stone obelisk marking a forgotten terrestrial meridian stands
# beside the river at Kew. In the 18th century, before time and longitude
# was standardised by the Royal Observatory in Greenwich, scholars observed
# this stone and the movement of stars from Kew Observatory nearby. They
# made their calculations and set the time for the Horse Guards and Parliament,
# but now the stone is obscured by scrubwood and can only be seen by walking
# along the towpath within a few yards of it.'
#
# I have a one inch to one mile map of London and my estimate of the stone's
# position is 51° 28' 30" N, 0° 18' 45" W. The longitude should
# be within about ±2". The Ordnance Survey grid reference is TQ172761.
#
# [This yields STDOFF = -0:01:15 for London LMT in the 18th century.]

# From Paul Eggert (1993-11-18):
#
# Howse writes that Britain was the first country to use standard time.
# The railways cared most about the inconsistencies of local mean time,
# and it was they who forced a uniform time on the country.
# The original idea was credited to Dr. William Hyde Wollaston (1766-1828)
# and was popularized by Abraham Follett Osler (1808-1903).
# The first railway to adopt London time was the Great Western Railway
# in November 1840; other railways followed suit, and by 1847 most
# (though not all) railways used London time.  On 1847-09-22 the
# Railway Clearing House, an industry standards body, recommended that GMT be
# adopted at all stations as soon as the General Post Office permitted it.
# The transition occurred on 12-01 for the L&NW, the Caledonian,
# and presumably other railways; the January 1848 Bradshaw's lists many
# railways as using GMT.  By 1855 the vast majority of public
# clocks in Britain were set to GMT (though some, like the great clock
# on Tom Tower at Christ Church, Oxford, were fitted with two minute hands,
# one for local time and one for GMT).  The last major holdout was the legal
# system, which stubbornly stuck to local time for many years, leading
# to oddities like polls opening at 08:13 and closing at 16:13.
# The legal system finally switched to GMT when the Statutes (Definition
# of Time) Act took effect; it received the Royal Assent on 1880-08-02.
#
# In the tables below, we condense this complicated story into a single
# transition date for London, namely 1847-12-01.  We don't know as much
# about Dublin, so we use 1880-08-02, the legal transition time.

# From Paul Eggert (2014-07-19):
# The ancients had no need for daylight saving, as they kept time
# informally or via hours whose length depended on the time of year.
# Daylight saving time in its modern sense was invented by the
# New Zealand entomologist George Vernon Hudson (1867-1946),
# whose day job as a postal clerk led him to value
# after-hours daylight in which to pursue his research.
# In 1895 he presented a paper to the Wellington Philosophical Society
# that proposed a two-hour daylight-saving shift.  See:
# Hudson GV. On seasonal time-adjustment in countries south of lat. 30°.
# Transactions and Proceedings of the New Zealand Institute. 1895;28:734
# http://rsnz.natlib.govt.nz/volume/rsnz_28/rsnz_28_00_006110.html
# Although some interest was expressed in New Zealand, his proposal
# did not find its way into law and eventually it was almost forgotten.
#
# In England, DST was independently reinvented by William Willett (1857-1915),
# a London builder and member of the Royal Astronomical Society
# who circulated a pamphlet "The Waste of Daylight" (1907)
# that proposed advancing clocks 20 minutes on each of four Sundays in April,
# and retarding them by the same amount on four Sundays in September.
# A bill was drafted in 1909 and introduced in Parliament several times,
# but it met with ridicule and opposition, especially from farming interests.
# Later editions of the pamphlet proposed one-hour summer time, and
# it was eventually adopted as a wartime measure in 1916.
# See: Summer Time Arrives Early, The Times (2000-05-18).
# A monument to Willett was unveiled on 1927-05-21, in an open space in
# a 45-acre wood near Chislehurst, Kent that was purchased by popular
# subscription and open to the public.  On the south face of the monolith,
# designed by G. W. Miller, is the William Willett Memorial Sundial,
# which is permanently set to Summer Time.

# From Winston Churchill (1934-04-28):
# It is one of the paradoxes of history that we should owe the boon of
# summer time, which gives every year to the people of this country
# between 160 and 170 hours more daylight leisure, to a war which
# plunged Europe into darkness for four years, and shook the
# foundations of civilization throughout the world.
#	-- "A Silent Toast to William Willett", Pictorial Weekly;
#	republished in Finest Hour (Spring 2002) 1(114):26
#	https://www.winstonchurchill.org/publications/finest-hour/finest-hour-114/a-silent-toast-to-william-willett-by-winston-s-churchill

# From Paul Eggert (2015-08-08):
# The OED Supplement says that the English originally said "Daylight Saving"
# when they were debating the adoption of DST in 1908; but by 1916 this
# term appears only in quotes taken from DST's opponents, whereas the
# proponents (who eventually won the argument) are quoted as using "Summer".
# The term "Summer Time" was introduced by Herbert Samuel, Home Secretary; see:
# Viscount Samuel. Leisure in a Democracy. Cambridge University Press
# ISBN 978-1-107-49471-8 (1949, reissued 2015), p 8.

# From Arthur David Olson (1989-01-19):
# A source at the British Information Office in New York avers that it's
# known as "British" Summer Time in all parts of the United Kingdom.

# Date: 4 Jan 89 08:57:25 GMT (Wed)
# From: Jonathan Leffler
# [British Summer Time] is fixed annually by Act of Parliament.
# If you can predict what Parliament will do, you should be in
# politics making a fortune, not computing.

# From Chris Carrier (1996-06-14):
# I remember reading in various wartime issues of the London Times the
# acronym BDST for British Double Summer Time.  Look for the published
# time of sunrise and sunset in The Times, when BDST was in effect, and
# if you find a zone reference it will say, "All times B.D.S.T."

# From Joseph S. Myers (1999-09-02):
# ... some military cables (WO 219/4100 - this is a copy from the
# main SHAEF archives held in the US National Archives, SHAEF/5252/8/516)
# agree that the usage is BDST (this appears in a message dated 17 Feb 1945).

# From Joseph S. Myers (2000-10-03):
# On 18th April 1941, Sir Stephen Tallents of the BBC wrote to Sir
# Alexander Maxwell of the Home Office asking whether there was any
# official designation; the reply of the 21st was that there wasn't
# but he couldn't think of anything better than the "Double British
# Summer Time" that the BBC had been using informally.
# https://www.polyomino.org.uk/british-time/bbc-19410418.png
# https://www.polyomino.org.uk/british-time/ho-19410421.png

# From Sir Alexander Maxwell in the above-mentioned letter (1941-04-21):
# [N]o official designation has as far as I know been adopted for the time
# which is to be introduced in May....
# I cannot think of anything better than "Double British Summer Time"
# which could not be said to run counter to any official description.

# From Paul Eggert (2000-10-02):
# Howse writes (p 157) 'DBST' too, but 'BDST' seems to have been common
# and follows the more usual convention of putting the location name first,
# so we use 'BDST'.

# Peter Ilieve (1998-04-19) described at length
# the history of summer time legislation in the United Kingdom.
# Since 1998 Joseph S. Myers has been updating
# and extending this list, which can be found in
# https://www.polyomino.org.uk/british-time/

# From Joseph S. Myers (1998-01-06):
#
# The legal time in the UK outside of summer time is definitely GMT, not UTC;
# see Lord Tanlaw's speech
# https://www.publications.parliament.uk/pa/ld199798/ldhansrd/vo970611/text/70611-10.htm#70611-10_head0
# (Lords Hansard 11 June 1997 columns 964 to 976).

# From Paul Eggert (2006-03-22):
#
# For lack of other data, follow Shanks & Pottenger for Eire in 1940-1948.
#
# Given Ilieve and Myers's data, the following claims by Shanks & Pottenger
# are incorrect:
#     * Wales did not switch from GMT to daylight saving time until
#	1921 Apr 3, when they began to conform with the rest of Great Britain.
# Actually, Wales was identical after 1880.
#     * Eire had two transitions on 1916 Oct 1.
# It actually just had one transition.
#     * Northern Ireland used single daylight saving time throughout WW II.
# Actually, it conformed to Britain.
#     * GB-Eire changed standard time to 1 hour ahead of GMT on 1968-02-18.
# Actually, that date saw the usual switch to summer time.
# Standard time was not changed until 1968-10-27 (the clocks didn't change).
#
# Here is another incorrect claim by Shanks & Pottenger:
#     * Jersey, Guernsey, and the Isle of Man did not switch from GMT
#	to daylight saving time until 1921 Apr 3, when they began to
#	conform with Great Britain.
# S.R.&O. 1916, No. 382 and HO 45/10811/312364 (quoted above) say otherwise.
#
# The following claim by Shanks & Pottenger is possible though doubtful;
# we'll ignore it for now.
#     * Dublin's 1971-10-31 switch was at 02:00, even though London's was 03:00.

# From Paul Eggert (2017-12-04):
#
# Dunsink Observatory (8 km NW of Dublin's center) was to Dublin as
# Greenwich was to London.  For example:
#
#   "Timeball on the ballast office is down.  Dunsink time."
#   -- James Joyce, Ulysses
#
# The abbreviation DMT stood for "Dublin Mean Time" or "Dunsink Mean Time";
# this being Ireland, opinions differed.
#
# Whitman says Dublin/Dunsink Mean Time was UT-00:25:21, which agrees
# with measurements of recent visitors to the Meridian Room of Dunsink
# Observatory; see Malone D. Dunsink and timekeeping. 2016-01-24.
# <https://www.maths.tcd.ie/~dwmalone/time/dunsink.html>.  Malone
# writes that the Nautical Almanac listed UT-00:25:22 until 1896, when
# it moved to UT-00:25:21.1 (I confirmed that the 1893 edition used
# the former and the 1896 edition used the latter).  Evidently the
# news of this change propagated slowly, as Milne 1899 still lists
# UT-00:25:22 and cites the International Telegraph Bureau.  As it is
# not clear that there was any practical significance to the change
# from UT-00:25:22 to UT-00:25:21.1 in civil timekeeping, omit this
# transition for now and just use the latter value.

# "Countess Markievicz ... claimed that the [1916] abolition of Dublin Mean Time
# was among various actions undertaken by the 'English' government that
# would 'put the whole country into the SF (Sinn Féin) camp'.  She claimed
# Irish 'public feeling (was) outraged by forcing of English time on us'."
# -- Parsons M. Dublin lost its time zone - and 25 minutes - after 1916 Rising.
# Irish Times 2014-10-27.
# https://www.irishtimes.com/news/politics/dublin-lost-its-time-zone-and-25-minutes-after-1916-rising-1.1977411

# From Joseph S. Myers (2005-01-26):
# Irish laws are available online at <http://www.irishstatutebook.ie>.
# These include various relating to legal time, for example:
#
# ZZA13Y1923.html ZZA12Y1924.html ZZA8Y1925.html ZZSIV20PG1267.html
#
# ZZSI71Y1947.html ZZSI128Y1948.html ZZSI23Y1949.html ZZSI41Y1950.html
# ZZSI27Y1951.html ZZSI73Y1952.html
#
# ZZSI11Y1961.html ZZSI232Y1961.html ZZSI182Y1962.html
# ZZSI167Y1963.html ZZSI257Y1964.html ZZSI198Y1967.html
# ZZA23Y1968.html ZZA17Y1971.html
#
# ZZSI67Y1981.html ZZSI212Y1982.html ZZSI45Y1986.html
# ZZSI264Y1988.html ZZSI52Y1990.html ZZSI371Y1992.html
# ZZSI395Y1994.html ZZSI484Y1997.html ZZSI506Y2001.html
#
# [These are all relative to the root, e.g., the first is
# <http://www.irishstatutebook.ie/ZZA13Y1923.html>.]
#
# (These are those I found, but there could be more.  In any case these
# should allow various updates to the comments in the europe file to cover
# the laws applicable in Ireland.)
#
# (Note that the time in the Republic of Ireland since 1968 has been defined
# in terms of standard time being GMT+1 with a period of winter time when it
# is GMT, rather than standard time being GMT with a period of summer time
# being GMT+1.)

# From Paul Eggert (1999-03-28):
# Clive Feather (<news:859845706.26043.0@office.demon.net>, 1997-03-31)
# reports that Folkestone (Cheriton) Shuttle Terminal uses Concession Time
# (CT), equivalent to French civil time.
# Julian Hill (<news:36118128.5A14@virgin.net>, 1998-09-30) reports that
# trains between Dollands Moor (the freight facility next door)
# and Frethun run in CT.
# My admittedly uninformed guess is that the terminal has two authorities,
# the French concession operators and the British civil authorities,
# and that the time depends on who you're talking to.
# If, say, the British police were called to the station for some reason,
# I would expect the official police report to use GMT/BST and not CET/CEST.
# This is a borderline case, but for now let's stick to GMT/BST.

# From an anonymous contributor (1996-06-02):
# The law governing time in Ireland is under Statutory Instrument SI 395/94,
# which gives force to European Union 7th Council Directive No. 94/21/EC.
# Under this directive, the Minister for Justice in Ireland makes appropriate
# regulations. I spoke this morning with the Secretary of the Department of
# Justice (tel +353 1 678 9711) who confirmed to me that the correct name is
# "Irish Summer Time", abbreviated to "IST".
#
# From Paul Eggert (2017-12-07):
# The 1996 anonymous contributor's goal was to determine the correct
# abbreviation for summer time in Dublin and so the contributor
# focused on the "IST", not on the "Irish Summer Time".  Though the
# "IST" was correct, the "Irish Summer Time" appears to have been an
# error, as Ireland's Standard Time (Amendment) Act, 1971 states that
# standard time in Ireland remains at UT +01 and is observed in
# summer, and that Greenwich mean time is observed in winter.  (Thanks
# to Derick Rethans for pointing out the error.)  That is, when
# Ireland amended the 1968 act that established UT +01 as Irish
# Standard Time, it left standard time unchanged and established GMT
# as a negative daylight saving time in winter.  So, in this database
# IST stands for Irish Summer Time for timestamps before 1968, and for
# Irish Standard Time after that.  See:
# http://www.irishstatutebook.ie/eli/1971/act/17/enacted/en/print

# Michael Deckers (2017-06-01) gave the following URLs for Ireland's
# Summer Time Act, 1925 and Summer Time Orders, 1926 and 1947:
# http://www.irishstatutebook.ie/eli/1925/act/8/enacted/en/print
# http://www.irishstatutebook.ie/eli/1926/sro/919/made/en/print
# http://www.irishstatutebook.ie/eli/1947/sro/71/made/en/print

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
# Summer Time Act, 1916
Rule	GB-Eire	1916	only	-	May	21	2:00s	1:00	BST
Rule	GB-Eire	1916	only	-	Oct	 1	2:00s	0	GMT
# S.R.&O. 1917, No. 358
Rule	GB-Eire	1917	only	-	Apr	 8	2:00s	1:00	BST
Rule	GB-Eire	1917	only	-	Sep	17	2:00s	0	GMT
# S.R.&O. 1918, No. 274
Rule	GB-Eire	1918	only	-	Mar	24	2:00s	1:00	BST
Rule	GB-Eire	1918	only	-	Sep	30	2:00s	0	GMT
# S.R.&O. 1919, No. 297
Rule	GB-Eire	1919	only	-	Mar	30	2:00s	1:00	BST
Rule	GB-Eire	1919	only	-	Sep	29	2:00s	0	GMT
# S.R.&O. 1920, No. 458
Rule	GB-Eire	1920	only	-	Mar	28	2:00s	1:00	BST
# S.R.&O. 1920, No. 1844
Rule	GB-Eire	1920	only	-	Oct	25	2:00s	0	GMT
# S.R.&O. 1921, No. 363
Rule	GB-Eire	1921	only	-	Apr	 3	2:00s	1:00	BST
Rule	GB-Eire	1921	only	-	Oct	 3	2:00s	0	GMT
# S.R.&O. 1922, No. 264
Rule	GB-Eire	1922	only	-	Mar	26	2:00s	1:00	BST
Rule	GB-Eire	1922	only	-	Oct	 8	2:00s	0	GMT
# The Summer Time Act, 1922
Rule	GB-Eire	1923	only	-	Apr	Sun>=16	2:00s	1:00	BST
Rule	GB-Eire	1923	1924	-	Sep	Sun>=16	2:00s	0	GMT
Rule	GB-Eire	1924	only	-	Apr	Sun>=9	2:00s	1:00	BST
Rule	GB-Eire	1925	1926	-	Apr	Sun>=16	2:00s	1:00	BST
# The Summer Time Act, 1925
Rule	GB-Eire	1925	1938	-	Oct	Sun>=2	2:00s	0	GMT
Rule	GB-Eire	1927	only	-	Apr	Sun>=9	2:00s	1:00	BST
Rule	GB-Eire	1928	1929	-	Apr	Sun>=16	2:00s	1:00	BST
Rule	GB-Eire	1930	only	-	Apr	Sun>=9	2:00s	1:00	BST
Rule	GB-Eire	1931	1932	-	Apr	Sun>=16	2:00s	1:00	BST
Rule	GB-Eire	1933	only	-	Apr	Sun>=9	2:00s	1:00	BST
Rule	GB-Eire	1934	only	-	Apr	Sun>=16	2:00s	1:00	BST
Rule	GB-Eire	1935	only	-	Apr	Sun>=9	2:00s	1:00	BST
Rule	GB-Eire	1936	1937	-	Apr	Sun>=16	2:00s	1:00	BST
Rule	GB-Eire	1938	only	-	Apr	Sun>=9	2:00s	1:00	BST
Rule	GB-Eire	1939	only	-	Apr	Sun>=16	2:00s	1:00	BST
# S.R.&O. 1939, No. 1379
Rule	GB-Eire	1939	only	-	Nov	Sun>=16	2:00s	0	GMT
# S.R.&O. 1940, No. 172 and No. 1883
Rule	GB-Eire	1940	only	-	Feb	Sun>=23	2:00s	1:00	BST
# S.R.&O. 1941, No. 476
Rule	GB-Eire	1941	only	-	May	Sun>=2	1:00s	2:00	BDST
Rule	GB-Eire	1941	1943	-	Aug	Sun>=9	1:00s	1:00	BST
# S.R.&O. 1942, No. 506
Rule	GB-Eire	1942	1944	-	Apr	Sun>=2	1:00s	2:00	BDST
# S.R.&O. 1944, No. 932
Rule	GB-Eire	1944	only	-	Sep	Sun>=16	1:00s	1:00	BST
# S.R.&O. 1945, No. 312
Rule	GB-Eire	1945	only	-	Apr	Mon>=2	1:00s	2:00	BDST
Rule	GB-Eire	1945	only	-	Jul	Sun>=9	1:00s	1:00	BST
# S.R.&O. 1945, No. 1208
Rule	GB-Eire	1945	1946	-	Oct	Sun>=2	2:00s	0	GMT
Rule	GB-Eire	1946	only	-	Apr	Sun>=9	2:00s	1:00	BST
# The Summer Time Act, 1947
Rule	GB-Eire	1947	only	-	Mar	16	2:00s	1:00	BST
Rule	GB-Eire	1947	only	-	Apr	13	1:00s	2:00	BDST
Rule	GB-Eire	1947	only	-	Aug	10	1:00s	1:00	BST
Rule	GB-Eire	1947	only	-	Nov	 2	2:00s	0	GMT
# Summer Time Order, 1948 (S.I. 1948/495)
Rule	GB-Eire	1948	only	-	Mar	14	2:00s	1:00	BST
Rule	GB-Eire	1948	only	-	Oct	31	2:00s	0	GMT
# Summer Time Order, 1949 (S.I. 1949/373)
Rule	GB-Eire	1949	only	-	Apr	 3	2:00s	1:00	BST
Rule	GB-Eire	1949	only	-	Oct	30	2:00s	0	GMT
# Summer Time Order, 1950 (S.I. 1950/518)
# Summer Time Order, 1951 (S.I. 1951/430)
# Summer Time Order, 1952 (S.I. 1952/451)
Rule	GB-Eire	1950	1952	-	Apr	Sun>=14	2:00s	1:00	BST
Rule	GB-Eire	1950	1952	-	Oct	Sun>=21	2:00s	0	GMT
# revert to the rules of the Summer Time Act, 1925
Rule	GB-Eire	1953	only	-	Apr	Sun>=16	2:00s	1:00	BST
Rule	GB-Eire	1953	1960	-	Oct	Sun>=2	2:00s	0	GMT
Rule	GB-Eire	1954	only	-	Apr	Sun>=9	2:00s	1:00	BST
Rule	GB-Eire	1955	1956	-	Apr	Sun>=16	2:00s	1:00	BST
Rule	GB-Eire	1957	only	-	Apr	Sun>=9	2:00s	1:00	BST
Rule	GB-Eire	1958	1959	-	Apr	Sun>=16	2:00s	1:00	BST
Rule	GB-Eire	1960	only	-	Apr	Sun>=9	2:00s	1:00	BST
# Summer Time Order, 1961 (S.I. 1961/71)
# Summer Time (1962) Order, 1961 (S.I. 1961/2465)
# Summer Time Order, 1963 (S.I. 1963/81)
Rule	GB-Eire	1961	1963	-	Mar	lastSun	2:00s	1:00	BST
Rule	GB-Eire	1961	1968	-	Oct	Sun>=23	2:00s	0	GMT
# Summer Time (1964) Order, 1963 (S.I. 1963/2101)
# Summer Time Order, 1964 (S.I. 1964/1201)
# Summer Time Order, 1967 (S.I. 1967/1148)
Rule	GB-Eire	1964	1967	-	Mar	Sun>=19	2:00s	1:00	BST
# Summer Time Order, 1968 (S.I. 1968/117)
Rule	GB-Eire	1968	only	-	Feb	18	2:00s	1:00	BST
# The British Standard Time Act, 1968
#	(no summer time)
# The Summer Time Act, 1972
Rule	GB-Eire	1972	1980	-	Mar	Sun>=16	2:00s	1:00	BST
Rule	GB-Eire	1972	1980	-	Oct	Sun>=23	2:00s	0	GMT
# Summer Time Order, 1980 (S.I. 1980/1089)
# Summer Time Order, 1982 (S.I. 1982/1673)
# Summer Time Order, 1986 (S.I. 1986/223)
# Summer Time Order, 1988 (S.I. 1988/931)
Rule	GB-Eire	1981	1995	-	Mar	lastSun	1:00u	1:00	BST
Rule	GB-Eire 1981	1989	-	Oct	Sun>=23	1:00u	0	GMT
# Summer Time Order, 1989 (S.I. 1989/985)
# Summer Time Order, 1992 (S.I. 1992/1729)
# Summer Time Order 1994 (S.I. 1994/2798)
Rule	GB-Eire 1990	1995	-	Oct	Sun>=22	1:00u	0	GMT
# Summer Time Order 1997 (S.I. 1997/2982)
# See EU for rules starting in 1996.
#
# Use Europe/London for Jersey, Guernsey, and the Isle of Man.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/London	-0:01:15 -	LMT	1847 Dec  1
			 0:00	GB-Eire	%s	1968 Oct 27
			 1:00	-	BST	1971 Oct 31  2:00u
			 0:00	GB-Eire	%s	1996
			 0:00	EU	GMT/BST

# From Paul Eggert (2018-02-15):
# In January 2018 we discovered that the negative SAVE values in the
# Eire rules cause problems with tests for ICU:
# https://mm.icann.org/pipermail/tz/2018-January/025825.html
# and with tests for OpenJDK:
# https://mm.icann.org/pipermail/tz/2018-January/025822.html
#
# To work around this problem, the build procedure can translate the
# following data into two forms, one with negative SAVE values and the
# other form with a traditional approximation for Irish timestamps
# after 1971-10-31 02:00 UTC; although this approximation has tm_isdst
# flags that are reversed, its UTC offsets are correct and this often
# suffices....
#
# The following is like GB-Eire and EU, except with standard time in
# summer and negative daylight saving time in winter.  It is for when
# negative SAVE values are used.
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Eire	1971	only	-	Oct	31	 2:00u	-1:00	-
Rule	Eire	1972	1980	-	Mar	Sun>=16	 2:00u	0	-
Rule	Eire	1972	1980	-	Oct	Sun>=23	 2:00u	-1:00	-
Rule	Eire	1981	max	-	Mar	lastSun	 1:00u	0	-
Rule	Eire	1981	1989	-	Oct	Sun>=23	 1:00u	-1:00	-
Rule	Eire	1990	1995	-	Oct	Sun>=22	 1:00u	-1:00	-
Rule	Eire	1996	max	-	Oct	lastSun	 1:00u	-1:00	-

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
		#STDOFF	-0:25:21.1
Zone	Europe/Dublin	-0:25:21 -	LMT	1880 Aug  2
			-0:25:21 -	DMT	1916 May 21  2:00s
			-0:25:21 1:00	IST	1916 Oct  1  2:00s
			 0:00	GB-Eire	%s	1921 Dec  6 # independence
			 0:00	GB-Eire	GMT/IST	1940 Feb 25  2:00s
			 0:00	1:00	IST	1946 Oct  6  2:00s
			 0:00	-	GMT	1947 Mar 16  2:00s
			 0:00	1:00	IST	1947 Nov  2  2:00s
			 0:00	-	GMT	1948 Apr 18  2:00s
			 0:00	GB-Eire	GMT/IST	1968 Oct 27
# Vanguard section, for zic and other parsers that support negative DST.
			 1:00	Eire	IST/GMT
# Rearguard section, for parsers lacking negative DST; see ziguard.awk.
#			 1:00	-	IST	1971 Oct 31  2:00u
#			 0:00	GB-Eire	GMT/IST	1996
#			 0:00	EU	GMT/IST
# End of rearguard section.


###############################################################################

# Europe

# The following rules are for the European Union and for its
# predecessor organization, the European Communities.
# For brevity they are called "EU rules" elsewhere in this file.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	EU	1977	1980	-	Apr	Sun>=1	 1:00u	1:00	S
Rule	EU	1977	only	-	Sep	lastSun	 1:00u	0	-
Rule	EU	1978	only	-	Oct	 1	 1:00u	0	-
Rule	EU	1979	1995	-	Sep	lastSun	 1:00u	0	-
Rule	EU	1981	max	-	Mar	lastSun	 1:00u	1:00	S
Rule	EU	1996	max	-	Oct	lastSun	 1:00u	0	-
# The most recent directive covers the years starting in 2002.  See:
# Directive 2000/84/EC of the European Parliament and of the Council
# of 19 January 2001 on summer-time arrangements.
# http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=CELEX:32000L0084:EN:NOT

# W-Eur differs from EU only in that W-Eur uses standard time.
Rule	W-Eur	1977	1980	-	Apr	Sun>=1	 1:00s	1:00	S
Rule	W-Eur	1977	only	-	Sep	lastSun	 1:00s	0	-
Rule	W-Eur	1978	only	-	Oct	 1	 1:00s	0	-
Rule	W-Eur	1979	1995	-	Sep	lastSun	 1:00s	0	-
Rule	W-Eur	1981	max	-	Mar	lastSun	 1:00s	1:00	S
Rule	W-Eur	1996	max	-	Oct	lastSun	 1:00s	0	-

# Older C-Eur rules are for convenience in the tables.
# From 1977 on, C-Eur differs from EU only in that C-Eur uses standard time.
Rule	C-Eur	1916	only	-	Apr	30	23:00	1:00	S
Rule	C-Eur	1916	only	-	Oct	 1	 1:00	0	-
Rule	C-Eur	1917	1918	-	Apr	Mon>=15	 2:00s	1:00	S
Rule	C-Eur	1917	1918	-	Sep	Mon>=15	 2:00s	0	-
Rule	C-Eur	1940	only	-	Apr	 1	 2:00s	1:00	S
Rule	C-Eur	1942	only	-	Nov	 2	 2:00s	0	-
Rule	C-Eur	1943	only	-	Mar	29	 2:00s	1:00	S
Rule	C-Eur	1943	only	-	Oct	 4	 2:00s	0	-
Rule	C-Eur	1944	1945	-	Apr	Mon>=1	 2:00s	1:00	S
# Whitman gives 1944 Oct 7; go with Shanks & Pottenger.
Rule	C-Eur	1944	only	-	Oct	 2	 2:00s	0	-
# From Jesper Nørgaard Welen (2008-07-13):
#
# I found what is probably a typo of 2:00 which should perhaps be 2:00s
# in the C-Eur rule from tz database version 2008d (this part was
# corrected in version 2008d). The circumstantial evidence is simply the
# tz database itself, as seen below:
#
# Zone Europe/Paris ...
#    0:00 France WE%sT 1945 Sep 16  3:00
#
# Zone Europe/Monaco ...
#    0:00 France WE%sT 1945 Sep 16  3:00
#
# Zone Europe/Belgrade ...
#    1:00 1:00 CEST 1945 Sep 16  2:00s
#
# Rule France 1945 only - Sep 16  3:00 0 -
# Rule Belgium 1945 only - Sep 16  2:00s 0 -
# Rule Neth 1945 only - Sep 16 2:00s 0 -
#
# The rule line to be changed is:
#
# Rule C-Eur 1945 only - Sep 16  2:00 0 -
#
# It seems that Paris, Monaco, Rule France, Rule Belgium all agree on
# 2:00 standard time, e.g. 3:00 local time.  However there are no
# countries that use C-Eur rules in September 1945, so the only items
# affected are apparently these fictitious zones that translate acronyms
# CET and MET:
#
# Zone CET  1:00 C-Eur CE%sT
# Zone MET  1:00 C-Eur ME%sT
#
# It this is right then the corrected version would look like:
#
# Rule C-Eur 1945 only - Sep 16  2:00s 0 -
#
# A small step for mankind though 8-)
Rule	C-Eur	1945	only	-	Sep	16	 2:00s	0	-
Rule	C-Eur	1977	1980	-	Apr	Sun>=1	 2:00s	1:00	S
Rule	C-Eur	1977	only	-	Sep	lastSun	 2:00s	0	-
Rule	C-Eur	1978	only	-	Oct	 1	 2:00s	0	-
Rule	C-Eur	1979	1995	-	Sep	lastSun	 2:00s	0	-
Rule	C-Eur	1981	max	-	Mar	lastSun	 2:00s	1:00	S
Rule	C-Eur	1996	max	-	Oct	lastSun	 2:00s	0	-

# E-Eur differs from EU only in that E-Eur switches at midnight local time.
Rule	E-Eur	1977	1980	-	Apr	Sun>=1	 0:00	1:00	S
Rule	E-Eur	1977	only	-	Sep	lastSun	 0:00	0	-
Rule	E-Eur	1978	only	-	Oct	 1	 0:00	0	-
Rule	E-Eur	1979	1995	-	Sep	lastSun	 0:00	0	-
Rule	E-Eur	1981	max	-	Mar	lastSun	 0:00	1:00	S
Rule	E-Eur	1996	max	-	Oct	lastSun	 0:00	0	-


# Daylight saving time for Russia and the Soviet Union
#
# The 1917-1921 decree URLs are from Alexander Belopolsky (2016-08-23).

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Russia	1917	only	-	Jul	 1	23:00	1:00	MST  # Moscow Summer Time
#
# Decree No. 142 (1917-12-22) http://istmat.info/node/28137
Rule	Russia	1917	only	-	Dec	28	 0:00	0	MMT  # Moscow Mean Time
#
# Decree No. 497 (1918-05-30) http://istmat.info/node/30001
Rule	Russia	1918	only	-	May	31	22:00	2:00	MDST # Moscow Double Summer Time
Rule	Russia	1918	only	-	Sep	16	 1:00	1:00	MST
#
# Decree No. 258 (1919-05-29) http://istmat.info/node/37949
Rule	Russia	1919	only	-	May	31	23:00	2:00	MDST
#
Rule	Russia	1919	only	-	Jul	 1	 0:00u	1:00	MSD
Rule	Russia	1919	only	-	Aug	16	 0:00	0	MSK
#
# Decree No. 63 (1921-02-03) http://istmat.info/node/45840
Rule	Russia	1921	only	-	Feb	14	23:00	1:00	MSD
#
# Decree No. 121 (1921-03-07) http://istmat.info/node/45949
Rule	Russia	1921	only	-	Mar	20	23:00	2:00	+05
#
Rule	Russia	1921	only	-	Sep	 1	 0:00	1:00	MSD
Rule	Russia	1921	only	-	Oct	 1	 0:00	0	-
# Act No. 925 of the Council of Ministers of the USSR (1980-10-24):
Rule	Russia	1981	1984	-	Apr	 1	 0:00	1:00	S
Rule	Russia	1981	1983	-	Oct	 1	 0:00	0	-
# Act No. 967 of the Council of Ministers of the USSR (1984-09-13), repeated in
# Act No. 227 of the Council of Ministers of the USSR (1989-03-14):
Rule	Russia	1984	1995	-	Sep	lastSun	 2:00s	0	-
Rule	Russia	1985	2010	-	Mar	lastSun	 2:00s	1:00	S
#
Rule	Russia	1996	2010	-	Oct	lastSun	 2:00s	0	-
# As described below, Russia's 2014 change affects Zone data, not Rule data.

# From Stepan Golosunov (2016-03-07):
# Wikipedia and other sources refer to the Act of the Council of
# Ministers of the USSR from 1988-01-04 No. 5 and the Act of the
# Council of Ministers of the USSR from 1989-03-14 No. 227.
#
# I did not find full texts of these acts.  For the 1989 one we have
# title at https://base.garant.ru/70754136/ :
# "About change in calculation of time on the territories of
# Lithuanian SSR, Latvian SSR and Estonian SSR, Astrakhan,
# Kaliningrad, Kirov, Kuybyshev, Ulyanovsk and Uralsk oblasts".
# And http://astrozet.net/files/Zones/DOC/RU/1980-925.txt appears to
# contain quotes from both acts: Since last Sunday of March 1988 rules
# of the second time belt are installed in Volgograd and Saratov
# oblasts.  Since last Sunday of March 1989:
# a) Lithuanian SSR, Latvian SSR, Estonian SSR, Kaliningrad oblast:
# second time belt rules without extra hour (Moscow-1);
# b) Astrakhan, Kirov, Kuybyshev, Ulyanovsk oblasts: second time belt
# rules (Moscow time)
# c) Uralsk oblast: third time belt rules (Moscow+1).

# From Stepan Golosunov (2016-03-27):
# Unamended version of the act of the
# Government of the Russian Federation No. 23 from 08.01.1992
# http://pravo.gov.ru/proxy/ips/?docbody=&nd=102014034&rdk=0
# says that every year clocks were to be moved forward on last Sunday
# of March at 2 hours and moved backwards on last Sunday of September
# at 3 hours.  It was amended in 1996 to replace September with October.

# From Alexander Krivenyshev (2011-06-14):
# According to Kremlin press service, Russian President Dmitry Medvedev
# signed a federal law "On calculation of time" on June 9, 2011.
# According to the law Russia is abolishing daylight saving time.
#
# Medvedev signed a law "On the Calculation of Time" (in russian):
# http://bmockbe.ru/events/?ID=7583
#
# Medvedev signed a law on the calculation of the time (in russian):
# https://www.regnum.ru/news/polit/1413906.html

# From Arthur David Olson (2011-06-15):
# Take "abolishing daylight saving time" to mean that time is now considered
# to be standard.

# Previous editions of this database used abbreviations like MET DST
# for Central European Summer Time, but this didn't agree with common usage.

# From Markus Kuhn (1996-07-12):
# The official German names ... are
#
#	Mitteleuropäische Zeit (MEZ)         = UTC+01:00
#	Mitteleuropäische Sommerzeit (MESZ)  = UTC+02:00
#
# as defined in the German Time Act (Gesetz über die Zeitbestimmung (ZeitG),
# 1978-07-25, Bundesgesetzblatt, Jahrgang 1978, Teil I, S. 1110-1111)....
# I wrote ... to the German Federal Physical-Technical Institution
#
#	Physikalisch-Technische Bundesanstalt (PTB)
#	Laboratorium 4.41 "Zeiteinheit"
#	Postfach 3345
#	D-38023 Braunschweig
#	phone: +49 531 592-0
#
# ... I received today an answer letter from Dr. Peter Hetzel, head of the PTB
# department for time and frequency transmission.  He explained that the
# PTB translates MEZ and MESZ into English as
#
#	Central European Time (CET)         = UTC+01:00
#	Central European Summer Time (CEST) = UTC+02:00


# Albania
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Albania	1940	only	-	Jun	16	0:00	1:00	S
Rule	Albania	1942	only	-	Nov	 2	3:00	0	-
Rule	Albania	1943	only	-	Mar	29	2:00	1:00	S
Rule	Albania	1943	only	-	Apr	10	3:00	0	-
Rule	Albania	1974	only	-	May	 4	0:00	1:00	S
Rule	Albania	1974	only	-	Oct	 2	0:00	0	-
Rule	Albania	1975	only	-	May	 1	0:00	1:00	S
Rule	Albania	1975	only	-	Oct	 2	0:00	0	-
Rule	Albania	1976	only	-	May	 2	0:00	1:00	S
Rule	Albania	1976	only	-	Oct	 3	0:00	0	-
Rule	Albania	1977	only	-	May	 8	0:00	1:00	S
Rule	Albania	1977	only	-	Oct	 2	0:00	0	-
Rule	Albania	1978	only	-	May	 6	0:00	1:00	S
Rule	Albania	1978	only	-	Oct	 1	0:00	0	-
Rule	Albania	1979	only	-	May	 5	0:00	1:00	S
Rule	Albania	1979	only	-	Sep	30	0:00	0	-
Rule	Albania	1980	only	-	May	 3	0:00	1:00	S
Rule	Albania	1980	only	-	Oct	 4	0:00	0	-
Rule	Albania	1981	only	-	Apr	26	0:00	1:00	S
Rule	Albania	1981	only	-	Sep	27	0:00	0	-
Rule	Albania	1982	only	-	May	 2	0:00	1:00	S
Rule	Albania	1982	only	-	Oct	 3	0:00	0	-
Rule	Albania	1983	only	-	Apr	18	0:00	1:00	S
Rule	Albania	1983	only	-	Oct	 1	0:00	0	-
Rule	Albania	1984	only	-	Apr	 1	0:00	1:00	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Tirane	1:19:20 -	LMT	1914
			1:00	-	CET	1940 Jun 16
			1:00	Albania	CE%sT	1984 Jul
			1:00	EU	CE%sT

# Andorra
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Andorra	0:06:04 -	LMT	1901
			0:00	-	WET	1946 Sep 30
			1:00	-	CET	1985 Mar 31  2:00
			1:00	EU	CE%sT

# Austria

# Milne says Vienna time was 1:05:21.

# From Paul Eggert (2006-03-22): Shanks & Pottenger give 1918-06-16 and
# 1945-11-18, but the Austrian Federal Office of Metrology and
# Surveying (BEV) gives 1918-09-16 and for Vienna gives the "alleged"
# date of 1945-04-12 with no time.  For the 1980-04-06 transition
# Shanks & Pottenger give 02:00, the BEV 00:00.  Go with the BEV,
# and guess 02:00 for 1945-04-12.

# From Alois Treindl (2019-07-22):
# In 1946 the end of DST was on Monday, 7 October 1946, at 3:00 am.
# Shanks had this right.  Source: Die Weltpresse, 5. Oktober 1946, page 5.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Austria	1920	only	-	Apr	 5	2:00s	1:00	S
Rule	Austria	1920	only	-	Sep	13	2:00s	0	-
Rule	Austria	1946	only	-	Apr	14	2:00s	1:00	S
Rule	Austria	1946	only	-	Oct	 7	2:00s	0	-
Rule	Austria	1947	1948	-	Oct	Sun>=1	2:00s	0	-
Rule	Austria	1947	only	-	Apr	 6	2:00s	1:00	S
Rule	Austria	1948	only	-	Apr	18	2:00s	1:00	S
Rule	Austria	1980	only	-	Apr	 6	0:00	1:00	S
Rule	Austria	1980	only	-	Sep	28	0:00	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Vienna	1:05:21 -	LMT	1893 Apr
			1:00	C-Eur	CE%sT	1920
			1:00	Austria	CE%sT	1940 Apr  1  2:00s
			1:00	C-Eur	CE%sT	1945 Apr  2  2:00s
			1:00	1:00	CEST	1945 Apr 12  2:00s
			1:00	-	CET	1946
			1:00	Austria	CE%sT	1981
			1:00	EU	CE%sT

# Belarus
#
# From Stepan Golosunov (2016-07-02):
# http://www.lawbelarus.com/repub/sub30/texf9611.htm
# (Act of the Cabinet of Ministers of the Republic of Belarus from
# 1992-03-25 No. 157) ... says clocks were to be moved forward at 2:00
# on last Sunday of March and backward at 3:00 on last Sunday of September
# (the same as previous USSR and contemporary Russian regulations).
#
# From Yauhen Kharuzhy (2011-09-16):
# By latest Belarus government act Europe/Minsk timezone was changed to
# GMT+3 without DST (was GMT+2 with DST).
#
# Sources (Russian language):
# http://www.belta.by/ru/all_news/society/V-Belarusi-otmenjaetsja-perexod-na-sezonnoe-vremja_i_572952.html
# http://naviny.by/rubrics/society/2011/09/16/ic_articles_116_175144/
# https://news.tut.by/society/250578.html
#
# From Alexander Bokovoy (2014-10-09):
# Belarussian government decided against changing to winter time....
# http://eng.belta.by/all_news/society/Belarus-decides-against-adjusting-time-in-Russias-wake_i_76335.html
#
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Minsk	1:50:16 -	LMT	1880
			1:50	-	MMT	1924 May  2 # Minsk Mean Time
			2:00	-	EET	1930 Jun 21
			3:00	-	MSK	1941 Jun 28
			1:00	C-Eur	CE%sT	1944 Jul  3
			3:00	Russia	MSK/MSD	1990
			3:00	-	MSK	1991 Mar 31  2:00s
			2:00	Russia	EE%sT	2011 Mar 27  2:00s
			3:00	-	%z

# Belgium
# Luxembourg
# Netherlands
#
# From Michael Deckers (2019-08-25):
# The exposition in the web page
# https://www.bestor.be/wiki/index.php/Voyager_dans_le_temps._L%E2%80%99introduction_de_la_norme_de_Greenwich_en_Belgique
# gives several contemporary sources from which one can conclude that
# the switch in Europe/Brussels on 1892-05-01 was from 00:17:30 to 00:00:00.
#
# From Paul Eggert (2019-08-28):
# This quote helps explain the late-1914 situation:
#   In early November 1914, the Germans imposed the time zone used in central
#   Europe and forced the inhabitants to set their watches and public clocks
#   sixty minutes ahead.  Many were reluctant to accept "German time" and
#   continued to use "Belgian time" among themselves.  Reflecting the spirit of
#   resistance that arose in the population, a song made fun of this change....
# The song ended:
#   Putting your clock forward
#   Will but hasten the happy hour
#   When we kick out the Boches!
# See: Pluvinage G. Brussels on German time. Cahiers Bruxellois -
# Brusselse Cahiers. 2014;XLVI(1E):15-38.
# https://www.cairn.info/revue-cahiers-bruxellois-2014-1E-page-15.htm
#
# Entries from 1914 through 1917 are taken from "De tijd in België"
# <https://www.astro.oma.be/GENERAL/INFO/nli001a.html>.
# Entries from 1918 through 1991 are taken from:
#	Annuaire de L'Observatoire Royal de Belgique,
#	Avenue Circulaire, 3, B-1180 BRUXELLES, CLVIIe année, 1991
#	(Imprimerie HAYEZ, s.p.r.l., Rue Fin, 4, 1080 BRUXELLES, MCMXC),
#	pp 8-9.
# Thanks to Pascal Delmoitie for the 1918/1991 references.
# The 1918 rules are listed for completeness; they apply to unoccupied Belgium.
# Assume Brussels switched to WET in 1918 when the armistice took effect.
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Belgium	1918	only	-	Mar	 9	 0:00s	1:00	S
Rule	Belgium	1918	1919	-	Oct	Sat>=1	23:00s	0	-
Rule	Belgium	1919	only	-	Mar	 1	23:00s	1:00	S
Rule	Belgium	1920	only	-	Feb	14	23:00s	1:00	S
Rule	Belgium	1920	only	-	Oct	23	23:00s	0	-
Rule	Belgium	1921	only	-	Mar	14	23:00s	1:00	S
Rule	Belgium	1921	only	-	Oct	25	23:00s	0	-
Rule	Belgium	1922	only	-	Mar	25	23:00s	1:00	S
Rule	Belgium	1922	1927	-	Oct	Sat>=1	23:00s	0	-
Rule	Belgium	1923	only	-	Apr	21	23:00s	1:00	S
Rule	Belgium	1924	only	-	Mar	29	23:00s	1:00	S
Rule	Belgium	1925	only	-	Apr	 4	23:00s	1:00	S
# DSH writes that a royal decree of 1926-02-22 specified the Sun following 3rd
# Sat in Apr (except if it's Easter, in which case it's one Sunday earlier),
# to Sun following 1st Sat in Oct, and that a royal decree of 1928-09-15
# changed the transition times to 02:00 GMT.
Rule	Belgium	1926	only	-	Apr	17	23:00s	1:00	S
Rule	Belgium	1927	only	-	Apr	 9	23:00s	1:00	S
Rule	Belgium	1928	only	-	Apr	14	23:00s	1:00	S
Rule	Belgium	1928	1938	-	Oct	Sun>=2	 2:00s	0	-
Rule	Belgium	1929	only	-	Apr	21	 2:00s	1:00	S
Rule	Belgium	1930	only	-	Apr	13	 2:00s	1:00	S
Rule	Belgium	1931	only	-	Apr	19	 2:00s	1:00	S
Rule	Belgium	1932	only	-	Apr	 3	 2:00s	1:00	S
Rule	Belgium	1933	only	-	Mar	26	 2:00s	1:00	S
Rule	Belgium	1934	only	-	Apr	 8	 2:00s	1:00	S
Rule	Belgium	1935	only	-	Mar	31	 2:00s	1:00	S
Rule	Belgium	1936	only	-	Apr	19	 2:00s	1:00	S
Rule	Belgium	1937	only	-	Apr	 4	 2:00s	1:00	S
Rule	Belgium	1938	only	-	Mar	27	 2:00s	1:00	S
Rule	Belgium	1939	only	-	Apr	16	 2:00s	1:00	S
Rule	Belgium	1939	only	-	Nov	19	 2:00s	0	-
Rule	Belgium	1940	only	-	Feb	25	 2:00s	1:00	S
Rule	Belgium	1944	only	-	Sep	17	 2:00s	0	-
Rule	Belgium	1945	only	-	Apr	 2	 2:00s	1:00	S
Rule	Belgium	1945	only	-	Sep	16	 2:00s	0	-
Rule	Belgium	1946	only	-	May	19	 2:00s	1:00	S
Rule	Belgium	1946	only	-	Oct	 7	 2:00s	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Brussels	0:17:30 -	LMT	1880
			0:17:30	-	BMT	1892 May  1 00:17:30
			0:00	-	WET	1914 Nov  8
			1:00	-	CET	1916 May  1  0:00
			1:00	C-Eur	CE%sT	1918 Nov 11 11:00u
			0:00	Belgium	WE%sT	1940 May 20  2:00s
			1:00	C-Eur	CE%sT	1944 Sep  3
			1:00	Belgium	CE%sT	1977
			1:00	EU	CE%sT

# Bulgaria
#
# From Plamen Simenov via Steffen Thorsen (1999-09-09):
# A document of Government of Bulgaria (No. 94/1997) says:
# EET -> EETDST is in 03:00 Local time in last Sunday of March ...
# EETDST -> EET is in 04:00 Local time in last Sunday of October
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Bulg	1979	only	-	Mar	31	23:00	1:00	S
Rule	Bulg	1979	only	-	Oct	 1	 1:00	0	-
Rule	Bulg	1980	1982	-	Apr	Sat>=1	23:00	1:00	S
Rule	Bulg	1980	only	-	Sep	29	 1:00	0	-
Rule	Bulg	1981	only	-	Sep	27	 2:00	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Sofia	1:33:16 -	LMT	1880
			1:56:56	-	IMT	1894 Nov 30 # Istanbul MT?
			2:00	-	EET	1942 Nov  2  3:00
			1:00	C-Eur	CE%sT	1945
			1:00	-	CET	1945 Apr  2  3:00
			2:00	-	EET	1979 Mar 31 23:00
			2:00	Bulg	EE%sT	1982 Sep 26  3:00
			2:00	C-Eur	EE%sT	1991
			2:00	E-Eur	EE%sT	1997
			2:00	EU	EE%sT

# Cyprus
# Please see the 'asia' file for Asia/Nicosia.

# Czech Republic (Czechia)
# Slovakia
#
# From Ivan Benovic (2024-01-30):
# https://www.slov-lex.sk/pravne-predpisy/SK/ZZ/1946/54/
# (This is an official link to the Czechoslovak Summer Time Act of
# March 8, 1946 that authorizes the Czechoslovak government to set the
# exact dates of change to summer time and back to Central European Time.
# The act also implicitly confirms Central European Time as the
# official time zone of Czechoslovakia and currently remains in force
# in both the Czech Republic and Slovakia.)
# https://www.psp.cz/eknih/1945pns/tisky/t0216_00.htm
# (This is a link to the original legislative proposal dating back to
# February 22, 1946. The accompanying memorandum to the proposal says
# that an advisory committee on European railroad transportation that
# met in Brussels in October 1945 decided that the change of time
# should be carried out in all participating countries in a strictly
# coordinated manner....)
#
# From Paul Eggert (2024-01-30):
# The source for Czech data is: Kdy začíná a končí letní čas.
# https://kalendar.beda.cz/kdy-zacina-a-konci-letni-cas
# Its main text disagrees with its quoted sources only in 1918,
# where the main text says spring and autumn transitions
# occurred at 02:00 and 03:00 respectively (as usual),
# whereas the 1918 source "Oznámení o zavedení letního času v roce 1918"
# says transitions were at 01:00 and 02:00 respectively.
# As the 1918 source appears to be a humorous piece, and it is
# unlikely that Prague would have disagreed with its neighbors by an hour,
# go with the main text for now.
#
# We know of no English-language name for historical Czech winter time;
# abbreviate it as "GMT", as it happened to be GMT.
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Czech	1945	only	-	Apr	Mon>=1	2:00s	1:00	S
Rule	Czech	1945	only	-	Oct	 1	2:00s	0	-
Rule	Czech	1946	only	-	May	 6	2:00s	1:00	S
Rule	Czech	1946	1949	-	Oct	Sun>=1	2:00s	0	-
Rule	Czech	1947	1948	-	Apr	Sun>=15	2:00s	1:00	S
Rule	Czech	1949	only	-	Apr	 9	2:00s	1:00	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Prague	0:57:44 -	LMT	1850
			0:57:44	-	PMT	1891 Oct    # Prague Mean Time
			1:00	C-Eur	CE%sT	1945 May  9
			1:00	Czech	CE%sT	1946 Dec  1  3:00
# Vanguard section, for zic and other parsers that support negative DST.
			1:00	-1:00	GMT	1947 Feb 23  2:00
# Rearguard section, for parsers lacking negative DST; see ziguard.awk.
#			0:00	-	GMT	1947 Feb 23  2:00
# End of rearguard section.
			1:00	Czech	CE%sT	1979
			1:00	EU	CE%sT

# Faroe Is
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Atlantic/Faroe	-0:27:04 -	LMT	1908 Jan 11 # Tórshavn
			 0:00	-	WET	1981
			 0:00	EU	WE%sT

# Greenland
#
# From Paul Eggert (2004-10-31):
# During World War II, Germany maintained secret manned weather stations in
# East Greenland and Franz Josef Land, but we don't know their time zones.
# My source for this is Wilhelm Dege's book mentioned under Svalbard.
#
# From Paul Eggert (2017-12-10):
# Greenland joined the European Communities as part of Denmark,
# obtained home rule on 1979-05-01, and left the European Communities
# on 1985-02-01.  It therefore should have been using EU
# rules at least through 1984.  Shanks & Pottenger say Scoresbysund and Godthåb
# used C-Eur rules after 1980, but IATA SSIM (1991/1996) says they use EU
# rules since at least 1991.  Assume EU rules since 1980.

# From Gwillim Law (2001-06-06), citing
# <http://www.statkart.no/efs/efshefter/2001/efs5-2001.pdf> (2001-03-15),
# and with translations corrected by Steffen Thorsen:
#
# Greenland has four local times, and the relation to UTC
# is according to the following time line:
#
# The military zone near Thule	UTC-4
# Standard Greenland time	UTC-3
# Scoresbysund			UTC-1
# Danmarkshavn			UTC
#
# In the military area near Thule and in Danmarkshavn DST will not be
# introduced.

# From Rives McDow (2001-11-01):
#
# I correspond regularly with the Dansk Polarcenter, and wrote them at
# the time to clarify the situation in Thule.  Unfortunately, I have
# not heard back from them regarding my recent letter.  [But I have
# info from earlier correspondence.]
#
# According to the center, a very small local time zone around Thule
# Air Base keeps the time according to UTC-4, implementing daylight
# savings using North America rules, changing the time at 02:00 local time....
#
# The east coast of Greenland north of the community of Scoresbysund
# uses UTC in the same way as in Iceland, year round, with no dst.
# There are just a few stations on this coast, including the
# Danmarkshavn ICAO weather station mentioned in your September 29th
# email.  The other stations are two sledge patrol stations in
# Mestersvig and Daneborg, the air force base at Station Nord, and the
# DPC research station at Zackenberg.
#
# Scoresbysund and two small villages nearby keep time UTC-1 and use
# the same daylight savings time period as in West Greenland (Godthåb).
#
# The rest of Greenland, including Godthåb (this area, although it
# includes central Greenland, is known as west Greenland), keeps time
# UTC-3, with daylight savings methods according to European rules.
#
# It is common procedure to use UTC 0 in the wilderness of East and
# North Greenland, because it is mainly Icelandic aircraft operators
# maintaining traffic in these areas.  However, the official status of
# this area is that it sticks with Godthåb time.  This area might be
# considered a dual time zone in some respects because of this.

# From Rives McDow (2001-11-19):
# I heard back from someone stationed at Thule; the time change took place
# there at 2:00 AM.

# From Paul Eggert (2006-03-22):
# From 1997 on the CIA map shows Danmarkshavn on GMT;
# the 1995 map as like Godthåb.
# For lack of better info, assume they were like Godthåb before 1996.
# startkart.no says Thule does not observe DST, but this is clearly an error,
# so go with Shanks & Pottenger for Thule transitions until this year.
# For 2007 on assume Thule will stay in sync with US DST rules.

# From J William Piggott (2016-02-20):
# "Greenland north of the community of Scoresbysund" is officially named
# "National Park" by Executive Order:
# http://naalakkersuisut.gl/~/media/Nanoq/Files/Attached%20Files/Engelske-tekster/Legislation/Executive%20Order%20National%20Park.rtf
# It is their only National Park.

# From Jonas Nyrup (2022-11-24):
# On last Saturday in October 2023 when DST ends America/Nuuk will switch
# from -03/-02 to -02/-01
# https://sermitsiaq.ag/forslagtidsforskel-danmark-mindskes-sommertid-beholdes
# ...
# https://sermitsiaq.ag/groenland-skifte-tidszone-trods-bekymringer
#
# From Jürgen Appel (2022-11-25):
# https://ina.gl/samlinger/oversigt-over-samlinger/samling/dagsordener/dagsorden.aspx?lang=da&day=24-11-2022
#
# From Thomas M. Steenholdt (2022-12-02):
# - The bill to move America/Nuuk from UTC-03 to UTC-02 passed.
# - The bill to stop observing DST did not (Greenland will stop observing DST
#   when EU does).
# Details on the implementation are here (section 6):
# https://ina.gl/dvd/EM%202022/pdf/media/2553529/pkt17_em2022_tidens_bestemmelse_bem_da.pdf
# This is how the change will be implemented:
# 1. The shift *to* DST in 2023 happens as normal.
# 2. The shift *from* DST in 2023 happens as normal, but coincides with the
#    shift to UTC-02 normaltime (people will not change their clocks here).
# 3. After this, DST is still observed, but as -02/-01 instead of -03/-02.
#
# From Múte Bourup Egede via Jógvan Svabo Samuelsen (2023-03-15):
# Greenland will not switch to Daylight Saving Time this year, 2023,
# because the standard time for Greenland will change from UTC -3 to UTC -2.
# However, Greenland will change to Daylight Saving Time again in 2024
# and onwards.

# From Jule Dabars (2023-10-29):
# https://www.dr.dk/nyheder/seneste/i-nat-skal-uret-stilles-en-time-tilbage-men-foerste-gang-sker-det-ikke-i-groenland
# with a link to that page:
# https://naalakkersuisut.gl/Nyheder/2023/10/2710_sommertid
# ... Ittoqqortoormiit joins the time of Nuuk at March 2024.
# What would mean that America/Scoresbysund would either be in -01 year round
# or in -02/-01 like America/Nuuk, but no longer in -01/+00.
#
# From Paul Eggert (2023-10-29):
# For now, assume it will be like America/Nuuk.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Thule	1991	1992	-	Mar	lastSun	2:00	1:00	D
Rule	Thule	1991	1992	-	Sep	lastSun	2:00	0	S
Rule	Thule	1993	2006	-	Apr	Sun>=1	2:00	1:00	D
Rule	Thule	1993	2006	-	Oct	lastSun	2:00	0	S
Rule	Thule	2007	max	-	Mar	Sun>=8	2:00	1:00	D
Rule	Thule	2007	max	-	Nov	Sun>=1	2:00	0	S
#
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Danmarkshavn -1:14:40 -	LMT	1916 Jul 28
			-3:00	-	%z	1980 Apr  6  2:00
			-3:00	EU	%z	1996
			0:00	-	GMT
#
# Use the old name Scoresbysund, as the current name Ittoqqortoormiit
# exceeds tzdb's 14-letter limit and has no common English abbreviation.
Zone America/Scoresbysund -1:27:52 -	LMT	1916 Jul 28 # Ittoqqortoormiit
			-2:00	-	%z	1980 Apr  6  2:00
			-2:00	C-Eur	%z	1981 Mar 29
			-1:00	EU	%z	2024 Mar 31
			-2:00	EU	%z
Zone America/Nuuk	-3:26:56 -	LMT	1916 Jul 28 # Godthåb
			-3:00	-	%z	1980 Apr  6  2:00
			-3:00	EU	%z	2023 Mar 26  1:00u
			-2:00	-	%z	2023 Oct 29  1:00u
			-2:00	EU	%z
Zone America/Thule	-4:35:08 -	LMT	1916 Jul 28 # Pituffik
			-4:00	Thule	A%sT

# Estonia
#
# From Paul Eggert (2016-03-18):
# The 1989 transition is from USSR act No. 227 (1989-03-14).
#
# From Peter Ilieve (1994-10-15):
# A relative in Tallinn confirms the accuracy of the data for 1989 onwards
# [through 1994] and gives the legal authority for it,
# a regulation of the Government of Estonia, No. 111 of 1989....
#
# From Peter Ilieve (1996-10-28):
# [IATA SSIM (1992/1996) claims that the Baltic republics switch at 01:00s,
# but a relative confirms that Estonia still switches at 02:00s, writing:]
# "I do not [know] exactly but there are some little different
# (confusing) rules for International Air and Railway Transport Schedules
# conversion in Sunday connected with end of summer time in Estonia....
# A discussion is running about the summer time efficiency and effect on
# human physiology.  It seems that Estonia maybe will not change to
# summer time next spring."

# From Peter Ilieve (1998-11-04), heavily edited:
# The 1998-09-22 Estonian time law
# http://trip.rk.ee/cgi-bin/thw?${BASE}=akt&${OOHTML}=rtd&TA=1998&TO=1&AN=1390
# refers to the Eighth Directive and cites the association agreement between
# the EU and Estonia, ratified by the Estonian law (RT II 1995, 22-27, 120).
#
# I also asked [my relative] whether they use any standard abbreviation
# for their standard and summer times. He says no, they use "suveaeg"
# (summer time) and "talveaeg" (winter time).

# From The Baltic Times <https://www.baltictimes.com/> (1999-09-09)
# via Steffen Thorsen:
# This year will mark the last time Estonia shifts to summer time,
# a council of the ruling coalition announced Sept. 6....
# But what this could mean for Estonia's chances of joining the European
# Union are still unclear.  In 1994, the EU declared summer time compulsory
# for all member states until 2001.  Brussels has yet to decide what to do
# after that.

# From Mart Oruaas (2000-01-29):
# Regulation No. 301 (1999-10-12) obsoletes previous regulation
# No. 206 (1998-09-22) and thus sticks Estonia to +02:00 GMT for all
# the year round.  The regulation is effective 1999-11-01.

# From Toomas Soome (2002-02-21):
# The Estonian government has changed once again timezone politics.
# Now we are using again EU rules.
#
# From Urmet Jänes (2002-03-28):
# The legislative reference is Government decree No. 84 on 2002-02-21.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Tallinn	1:39:00	-	LMT	1880
			1:39:00	-	TMT	1918 Feb    # Tallinn Mean Time
			1:00	C-Eur	CE%sT	1919 Jul
			1:39:00	-	TMT	1921 May
			2:00	-	EET	1940 Aug  6
			3:00	-	MSK	1941 Sep 15
			1:00	C-Eur	CE%sT	1944 Sep 22
			3:00	Russia	MSK/MSD	1989 Mar 26  2:00s
			2:00	1:00	EEST	1989 Sep 24  2:00s
			2:00	C-Eur	EE%sT	1998 Sep 22
			2:00	EU	EE%sT	1999 Oct 31  4:00
			2:00	-	EET	2002 Feb 21
			2:00	EU	EE%sT

# Finland

# From Hannu Strang (1994-09-25 06:03:37 UTC):
# Well, here in Helsinki we're just changing from summer time to regular one,
# and it's supposed to change at 4am...

# From Janne Snabb (2010-07-15):
#
# I noticed that the Finland data is not accurate for years 1981 and 1982.
# During these two first trial years the DST adjustment was made one hour
# earlier than in forthcoming years. Starting 1983 the adjustment was made
# according to the central European standards.
#
# This is documented in Heikki Oja: Aikakirja 2007, published by The Almanac
# Office of University of Helsinki, ISBN 952-10-3221-9, available online (in
# Finnish) at
# https://almanakka.helsinki.fi/aikakirja/Aikakirja2007kokonaan.pdf
#
# Page 105 (56 in PDF version) has a handy table of all past daylight savings
# transitions. It is easy enough to interpret without Finnish skills.
#
# This is also confirmed by Finnish Broadcasting Company's archive at:
# http://www.yle.fi/elavaarkisto/?s=s&g=1&ag=5&t=&a=3401
#
# The news clip from 1981 says that "the time between 2 and 3 o'clock does not
# exist tonight."

# From Konstantin Hyppönen (2014-06-13):
# [Heikki Oja's book Aikakirja 2013]
# https://almanakka.helsinki.fi/images/aikakirja/Aikakirja2013kokonaan.pdf
# pages 104-105, including a scan from a newspaper published on Apr 2 1942
# say that ... [o]n Apr 2 1942, 24 o'clock (which means Apr 3 1942,
# 00:00), clocks were moved one hour forward. The newspaper
# mentions "on the night from Thursday to Friday"....
# On Oct 4 1942, clocks were moved at 1:00 one hour backwards.
#
# From Paul Eggert (2014-06-14):
# Go with Oja over Shanks.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Finland	1942	only	-	Apr	2	24:00	1:00	S
Rule	Finland	1942	only	-	Oct	4	1:00	0	-
Rule	Finland	1981	1982	-	Mar	lastSun	2:00	1:00	S
Rule	Finland	1981	1982	-	Sep	lastSun	3:00	0	-

# Milne says Helsinki (Helsingfors) time was 1:39:49.2 (official document).

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
		#STDOFF	1:39:49.2
Zone	Europe/Helsinki	1:39:49 -	LMT	1878 May 31
			1:39:49	-	HMT	1921 May    # Helsinki Mean Time
			2:00	Finland	EE%sT	1983
			2:00	EU	EE%sT

# France
# Monaco

# From Ciro Discepolo (2000-12-20):
#
# Henri Le Corre, Régimes horaires pour le monde entier, Éditions
# Traditionnelles - Paris 2 books, 1993
#
# Gabriel, Traité de l'heure dans le monde, Guy Trédaniel,
# Paris, 1991
#
# Françoise Gauquelin, Problèmes de l'heure résolus en astrologie,
# Guy Trédaniel, Paris 1987

# From Michael Deckers (2020-06-11):
# the law of 1891 <https://gallica.bnf.fr/ark:/12148/bpt6k64415343.texteImage>
# was published on 1891-03-15, so it could only take force on 1891-03-16.

# From Michael Deckers (2020-06-10):
# Le Gaulois, 1911-03-11, page 1/6, online at
# https://www.retronews.fr/societe/echo-de-presse/2018/01/29/1911-change-lheure-de-paris
# ... [ Instantly, all pressure driven clock dials halted...  Nine minutes and
#       twenty-one seconds later the hands resumed their circular motion. ]
# There are also precise reports about how the change was prepared in train
# stations: all the publicly visible clocks stopped at midnight railway time
# (or were covered), only the chief of service had a watch, labeled
# "Heure ancienne", that he kept running until it reached 00:04:21, when
# he announced "Heure nouvelle".  See the "Le Petit Journal 1911-03-11".
# https://gallica.bnf.fr/ark:/12148/bpt6k6192911/f1.item.zoom
#
# From Michael Deckers (2020-06-12):
# That "all French clocks stopped" for 00:09:21 is a misreading of French
# newspapers; this sort of adjustment applies only to certain
# remote-controlled clocks ("pendules pneumatiques", of which there existed
# perhaps a dozen in Paris, and which simply could not be set back remotely),
# but not to all the clocks in all French towns and villages.  For instance,
# the following story in the "Courrier de Saône-et-Loire" 1911-03-11, page 2:
# only works if legal time was stepped back (was not monotone): ...
#   [One can observe that children who had been born at midnight less 5
#    minutes and who had died at midnight of the old time, would turn out to
#    be dead before being born, time having been set back and having
#    suppressed 9 minutes and 25 seconds of their existence, that is, more
#    than they could spend.]
#
# From Paul Eggert (2020-06-12):
# French time in railway stations was legally five minutes behind civil time,
# which explains why railway "old time" ran to 00:04:21 instead of to 00:09:21.
# The law's text (which Michael Deckers noted is at
# <https://gallica.bnf.fr/ark:/12148/bpt6k2022333z/f2>) says only that
# at 1911-03-11 00:00 legal time was that of Paris mean time delayed by
# nine minutes and twenty-one seconds, and does not say how the
# transition from Paris mean time was to occur.
#
# tzdb has no way to represent stopped clocks.  As the railway practice
# was to keep a watch running on "old time" to decide when to restart
# the other clocks, this could be modeled as a transition for "old time" at
# 00:09:21.  However, since the law was ambiguous and clocks outside railway
# stations were probably done haphazardly with the popular impression being
# that the transition was done at 00:00 "old time", simply leave the time
# blank; this causes zic to default to 00:00 "old time" which is good enough.
# Do something similar for the 1891-03-16 transition.  There are similar
# problems in Algiers, Monaco and Tunis.

#
# Shank & Pottenger seem to use '24:00' ambiguously; resolve it with Whitman.
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	France	1916	only	-	Jun	14	23:00s	1:00	S
Rule	France	1916	1919	-	Oct	Sun>=1	23:00s	0	-
Rule	France	1917	only	-	Mar	24	23:00s	1:00	S
Rule	France	1918	only	-	Mar	 9	23:00s	1:00	S
Rule	France	1919	only	-	Mar	 1	23:00s	1:00	S
Rule	France	1920	only	-	Feb	14	23:00s	1:00	S
Rule	France	1920	only	-	Oct	23	23:00s	0	-
Rule	France	1921	only	-	Mar	14	23:00s	1:00	S
Rule	France	1921	only	-	Oct	25	23:00s	0	-
Rule	France	1922	only	-	Mar	25	23:00s	1:00	S
# DSH writes that a law of 1923-05-24 specified 3rd Sat in Apr at 23:00 to 1st
# Sat in Oct at 24:00; and that in 1930, because of Easter, the transitions
# were Apr 12 and Oct 5.  Go with Shanks & Pottenger.
Rule	France	1922	1938	-	Oct	Sat>=1	23:00s	0	-
Rule	France	1923	only	-	May	26	23:00s	1:00	S
Rule	France	1924	only	-	Mar	29	23:00s	1:00	S
Rule	France	1925	only	-	Apr	 4	23:00s	1:00	S
Rule	France	1926	only	-	Apr	17	23:00s	1:00	S
Rule	France	1927	only	-	Apr	 9	23:00s	1:00	S
Rule	France	1928	only	-	Apr	14	23:00s	1:00	S
Rule	France	1929	only	-	Apr	20	23:00s	1:00	S
Rule	France	1930	only	-	Apr	12	23:00s	1:00	S
Rule	France	1931	only	-	Apr	18	23:00s	1:00	S
Rule	France	1932	only	-	Apr	 2	23:00s	1:00	S
Rule	France	1933	only	-	Mar	25	23:00s	1:00	S
Rule	France	1934	only	-	Apr	 7	23:00s	1:00	S
Rule	France	1935	only	-	Mar	30	23:00s	1:00	S
Rule	France	1936	only	-	Apr	18	23:00s	1:00	S
Rule	France	1937	only	-	Apr	 3	23:00s	1:00	S
Rule	France	1938	only	-	Mar	26	23:00s	1:00	S
Rule	France	1939	only	-	Apr	15	23:00s	1:00	S
Rule	France	1939	only	-	Nov	18	23:00s	0	-
Rule	France	1940	only	-	Feb	25	 2:00	1:00	S
# The French rules for 1941-1944 were not used in Paris, but Shanks & Pottenger
# write that they were used in Monaco and in many French locations.
# Le Corre writes that the upper limit of the free zone was Arnéguy, Orthez,
# Mont-de-Marsan, Bazas, Langon, Lamothe-Montravel, Marœuil, La
# Rochefoucauld, Champagne-Mouton, La Roche-Posay, La Haye-Descartes,
# Loches, Montrichard, Vierzon, Bourges, Moulins, Digoin,
# Paray-le-Monial, Montceau-les-Mines, Chalon-sur-Saône, Arbois,
# Dole, Morez, St-Claude, and Collonges (Haute-Savoie).
Rule	France	1941	only	-	May	 5	 0:00	2:00	M # Midsummer
# Shanks & Pottenger say this transition occurred at Oct 6 1:00,
# but go with Denis Excoffier (1997-12-12),
# who quotes the Ephémérides astronomiques for 1998 from Bureau des Longitudes
# as saying 5/10/41 22hUT.
Rule	France	1941	only	-	Oct	 6	 0:00	1:00	S
Rule	France	1942	only	-	Mar	 9	 0:00	2:00	M
Rule	France	1942	only	-	Nov	 2	 3:00	1:00	S
Rule	France	1943	only	-	Mar	29	 2:00	2:00	M
Rule	France	1943	only	-	Oct	 4	 3:00	1:00	S
Rule	France	1944	only	-	Apr	 3	 2:00	2:00	M
Rule	France	1944	only	-	Oct	 8	 1:00	1:00	S
Rule	France	1945	only	-	Apr	 2	 2:00	2:00	M
Rule	France	1945	only	-	Sep	16	 3:00	0	-
# Shanks & Pottenger give Mar 28 2:00 and Sep 26 3:00;
# go with Excoffier's 28/3/76 0hUT and 25/9/76 23hUT.
Rule	France	1976	only	-	Mar	28	 1:00	1:00	S
Rule	France	1976	only	-	Sep	26	 1:00	0	-
# Howse writes that the time in France was officially based
# on PMT-0:09:21 until 1978-08-09, when the time base finally switched to UTC.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Paris	0:09:21 -	LMT	1891 Mar 16
			0:09:21	-	PMT	1911 Mar 11 # Paris Mean Time
# Shanks & Pottenger give 1940 Jun 14 0:00; go with Excoffier and Le Corre.
			0:00	France	WE%sT	1940 Jun 14 23:00
# Le Corre says Paris stuck with occupied-France time after the liberation;
# go with Shanks & Pottenger.
			1:00	C-Eur	CE%sT	1944 Aug 25
			0:00	France	WE%sT	1945 Sep 16  3:00
			1:00	France	CE%sT	1977
			1:00	EU	CE%sT

# Denmark
# Germany
# Norway
# Sweden

# From Markus Kuhn (1998-09-29):
# The German time zone web site by the Physikalisch-Technische
# Bundesanstalt contains DST information back to 1916.
# [See tz-link.html for the URL.]

# From Jörg Schilling (2002-10-23):
# In 1945, Berlin was switched to Moscow Summer time (GMT+4) by
# https://www.dhm.de/lemo/html/biografien/BersarinNikolai/
# General [Nikolai] Bersarin.

# From Paul Eggert (2003-03-08):
# http://www.parlament-berlin.de/pds-fraktion.nsf/727459127c8b66ee8525662300459099/defc77cb784f180ac1256c2b0030274b/$FILE/bersarint.pdf
# says that Bersarin issued an order to use Moscow time on May 20.
# However, Moscow did not observe daylight saving in 1945, so
# this was equivalent to UT +03, not +04.

# Svalbard & Jan Mayen

# From Steffen Thorsen (2001-05-01):
# Although I could not find it explicitly, it seems that Jan Mayen and
# Svalbard have been using the same time as Norway at least since the
# time they were declared as parts of Norway.  Svalbard was declared
# as a part of Norway by law of 1925-07-17 no 11, section 4 and Jan
# Mayen by law of 1930-02-27 no 2, section 2. (From
# <http://www.lovdata.no/all/nl-19250717-011.html> and
# <http://www.lovdata.no/all/nl-19300227-002.html>).  The law/regulation
# for normal/standard time in Norway is from 1894-06-29 no 1 (came
# into operation on 1895-01-01) and Svalbard/Jan Mayen seem to be a
# part of this law since 1925/1930. (From
# <http://www.lovdata.no/all/nl-18940629-001.html>) I have not been
# able to find if Jan Mayen used a different time zone (e.g. -0100)
# before 1930. Jan Mayen has only been "inhabited" since 1921 by
# Norwegian meteorologists and maybe used the same time as Norway ever
# since 1921.  Svalbard (Arctic/Longyearbyen) has been inhabited since
# before 1895, and therefore probably changed the local time somewhere
# between 1895 and 1925 (inclusive).

# From Paul Eggert (2013-09-04):
#
# Actually, Jan Mayen was never occupied by Germany during World War II,
# so it must have diverged from Oslo time during the war, as Oslo was
# keeping Berlin time.
#
# <https://www.jan-mayen.no/history.htm> says that the meteorologists
# burned down their station in 1940 and left the island, but returned in
# 1941 with a small Norwegian garrison and continued operations despite
# frequent air attacks from Germans.  In 1943 the Americans established a
# radiolocating station on the island, called "Atlantic City".  Possibly
# the UT offset changed during the war, but I think it unlikely that
# Jan Mayen used German daylight-saving rules.
#
# Svalbard is more complicated, as it was raided in August 1941 by an
# Allied party that evacuated the civilian population to England (says
# <http://www.bartleby.com/65/sv/Svalbard.html>).  The Svalbard FAQ
# <http://www.svalbard.com/SvalbardFAQ.html> says that the Germans were
# expelled on 1942-05-14.  However, small parties of Germans did return,
# and according to Wilhelm Dege's book "War North of 80" (1954)
# http://www.ucalgary.ca/UofC/departments/UP/1-55238/1-55238-110-2.html
# the German armed forces at the Svalbard weather station code-named
# Haudegen did not surrender to the Allies until September 1945.
#
# All these events predate our cutoff date of 1970, so use Europe/Berlin
# for these regions.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Germany	1946	only	-	Apr	14	2:00s	1:00	S
Rule	Germany	1946	only	-	Oct	 7	2:00s	0	-
Rule	Germany	1947	1949	-	Oct	Sun>=1	2:00s	0	-
# https://www.ptb.de/cms/en/ptb/fachabteilungen/abt4/fb-44/ag-441/realisation-of-legal-time-in-germany/dst-and-midsummer-dst-in-germany-until-1979.html
# says the following transition occurred at 3:00 MEZ, not the 2:00 MEZ
# given in Shanks & Pottenger. Go with the PTB.
Rule	Germany	1947	only	-	Apr	 6	3:00s	1:00	S
Rule	Germany	1947	only	-	May	11	2:00s	2:00	M
Rule	Germany	1947	only	-	Jun	29	3:00	1:00	S
Rule	Germany	1948	only	-	Apr	18	2:00s	1:00	S
Rule	Germany	1949	only	-	Apr	10	2:00s	1:00	S

Rule SovietZone	1945	only	-	May	24	2:00	2:00	M # Midsummer
Rule SovietZone	1945	only	-	Sep	24	3:00	1:00	S
Rule SovietZone	1945	only	-	Nov	18	2:00s	0	-

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Berlin	0:53:28 -	LMT	1893 Apr
			1:00	C-Eur	CE%sT	1945 May 24  2:00
			1:00 SovietZone	CE%sT	1946
			1:00	Germany	CE%sT	1980
			1:00	EU	CE%sT

# Georgia
# Please see the "asia" file for Asia/Tbilisi.
# Herodotus (Histories, IV.45) says Georgia north of the Phasis (now Rioni)
# is in Europe.  Our reference location Tbilisi is in the Asian part.

# Gibraltar
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Europe/Gibraltar	-0:21:24 -	LMT	1880 Aug  2
			0:00	GB-Eire	%s	1957 Apr 14  2:00
			1:00	-	CET	1982
			1:00	EU	CE%sT

# Greece
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
# Whitman gives 1932 Jul 5 - Nov 1; go with Shanks & Pottenger.
Rule	Greece	1932	only	-	Jul	 7	0:00	1:00	S
Rule	Greece	1932	only	-	Sep	 1	0:00	0	-
# Whitman gives 1941 Apr 25 - ?; go with Shanks & Pottenger.
Rule	Greece	1941	only	-	Apr	 7	0:00	1:00	S
# Whitman gives 1942 Feb 2 - ?; go with Shanks & Pottenger.
Rule	Greece	1942	only	-	Nov	 2	3:00	0	-
Rule	Greece	1943	only	-	Mar	30	0:00	1:00	S
Rule	Greece	1943	only	-	Oct	 4	0:00	0	-
# Whitman gives 1944 Oct 3 - Oct 31; go with Shanks & Pottenger.
Rule	Greece	1952	only	-	Jul	 1	0:00	1:00	S
Rule	Greece	1952	only	-	Nov	 2	0:00	0	-
Rule	Greece	1975	only	-	Apr	12	0:00s	1:00	S
Rule	Greece	1975	only	-	Nov	26	0:00s	0	-
Rule	Greece	1976	only	-	Apr	11	2:00s	1:00	S
Rule	Greece	1976	only	-	Oct	10	2:00s	0	-
Rule	Greece	1977	1978	-	Apr	Sun>=1	2:00s	1:00	S
Rule	Greece	1977	only	-	Sep	26	2:00s	0	-
Rule	Greece	1978	only	-	Sep	24	4:00	0	-
Rule	Greece	1979	only	-	Apr	 1	9:00	1:00	S
Rule	Greece	1979	only	-	Sep	29	2:00	0	-
Rule	Greece	1980	only	-	Apr	 1	0:00	1:00	S
Rule	Greece	1980	only	-	Sep	28	0:00	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Athens	1:34:52 -	LMT	1895 Sep 14
			1:34:52	-	AMT	1916 Jul 28  0:01 # Athens MT
			2:00	Greece	EE%sT	1941 Apr 30
			1:00	Greece	CE%sT	1944 Apr  4
			2:00	Greece	EE%sT	1981
			# Shanks & Pottenger say it switched to C-Eur in 1981;
			# go with EU rules instead, since Greece joined Jan 1.
			2:00	EU	EE%sT

# Hungary

# From Michael Deckers (2020-06-09):
# an Austrian encyclopedia of railroads of 1913, online at
# http://www.zeno.org/Roell-1912/A/Eisenbahnzeit
# says that the switch [to CET] happened on 1890-11-01.

# From Géza Nyáry (2020-06-07):
# Data for 1918-1983 are based on the archive database of Library Hungaricana.
# The dates are collected from original, scanned governmental orders,
# bulletins, instructions and public press.
# [See URLs below.]

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
# https://library.hungaricana.hu/hu/view/OGYK_RT_1918/?pg=238
# https://library.hungaricana.hu/hu/view/OGYK_RT_1919/?pg=808
# https://library.hungaricana.hu/hu/view/OGYK_RT_1920/?pg=201
Rule	Hungary	1918	1919	-	Apr	15	 2:00	1:00	S
Rule	Hungary	1918	1920	-	Sep	Mon>=15	 3:00	0	-
Rule	Hungary	1920	only	-	Apr	 5	 2:00	1:00	S
# https://library.hungaricana.hu/hu/view/OGYK_RT_1945/?pg=882
Rule	Hungary	1945	only	-	May	 1	23:00	1:00	S
Rule	Hungary	1945	only	-	Nov	 1	 1:00	0	-
# https://library.hungaricana.hu/hu/view/Delmagyarorszag_1946_03/?pg=49
Rule	Hungary	1946	only	-	Mar	31	 2:00s	1:00	S
# https://library.hungaricana.hu/hu/view/Delmagyarorszag_1946_09/?pg=54
Rule	Hungary	1946	only	-	Oct	 7	 2:00	0	-
# https://library.hungaricana.hu/hu/view/KulfBelfHirek_1947_04_1__001-123/?pg=90
# https://library.hungaricana.hu/hu/view/DunantuliNaplo_1947_09/?pg=128
# https://library.hungaricana.hu/hu/view/KulfBelfHirek_1948_03_3__001-123/?pg=304
# https://library.hungaricana.hu/hu/view/Zala_1948_09/?pg=64
# https://library.hungaricana.hu/hu/view/SatoraljaujhelyiLeveltar_ZempleniNepujsag_1948/?pg=53
# https://library.hungaricana.hu/hu/view/SatoraljaujhelyiLeveltar_ZempleniNepujsag_1948/?pg=160
# https://library.hungaricana.hu/hu/view/UjSzo_1949_01-04/?pg=102
# https://library.hungaricana.hu/hu/view/KeletMagyarorszag_1949_03/?pg=96
# https://library.hungaricana.hu/hu/view/Delmagyarorszag_1949_09/?pg=94
Rule	Hungary	1947	1949	-	Apr	Sun>=4	 2:00s	1:00	S
Rule	Hungary	1947	1949	-	Oct	Sun>=1	 2:00s	0	-
# https://library.hungaricana.hu/hu/view/DTT_KOZL_TanacsokKozlonye_1954/?pg=513
Rule	Hungary	1954	only	-	May	23	 0:00	1:00	S
Rule	Hungary	1954	only	-	Oct	 3	 0:00	0	-
# https://library.hungaricana.hu/hu/view/DTT_KOZL_TanacsokKozlonye_1955/?pg=398
Rule	Hungary	1955	only	-	May	22	 2:00	1:00	S
Rule	Hungary	1955	only	-	Oct	 2	 3:00	0	-
# https://library.hungaricana.hu/hu/view/HevesMegyeiNepujsag_1956_06/?pg=0
# https://library.hungaricana.hu/hu/view/EszakMagyarorszag_1956_06/?pg=6
# https://library.hungaricana.hu/hu/view/SzolnokMegyeiNeplap_1957_04/?pg=120
# https://library.hungaricana.hu/hu/view/PestMegyeiHirlap_1957_09/?pg=143
Rule	Hungary	1956	1957	-	Jun	Sun>=1	 2:00	1:00	S
Rule	Hungary	1956	1957	-	Sep	lastSun	 3:00	0	-
# https://library.hungaricana.hu/hu/view/DTT_KOZL_TanacsokKozlonye_1980/?pg=189
Rule	Hungary	1980	only	-	Apr	 6	 0:00	1:00	S
Rule	Hungary	1980	only	-	Sep	28	 1:00	0	-
# https://library.hungaricana.hu/hu/view/DTT_KOZL_TanacsokKozlonye_1980/?pg=1227
# https://library.hungaricana.hu/hu/view/Delmagyarorszag_1981_01/?pg=79
# https://library.hungaricana.hu/hu/view/DTT_KOZL_TanacsokKozlonye_1982/?pg=115
# https://library.hungaricana.hu/hu/view/DTT_KOZL_TanacsokKozlonye_1983/?pg=85
Rule	Hungary	1981	1983	-	Mar	lastSun	 0:00	1:00	S
Rule	Hungary	1981	1983	-	Sep	lastSun	 1:00	0	-
#
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Budapest	1:16:20 -	LMT	1890 Nov  1
			1:00	C-Eur	CE%sT	1918
# https://library.hungaricana.hu/hu/view/OGYK_RT_1941/?pg=1204
# https://library.hungaricana.hu/hu/view/OGYK_RT_1942/?pg=3955
			1:00	Hungary	CE%sT	1941 Apr  7 23:00
			1:00	C-Eur	CE%sT	1945
			1:00	Hungary	CE%sT	1984
			1:00	EU	CE%sT

# Italy
# San Marino
# Vatican City
#
# From Paul Eggert (2001-03-06):
# Sicily and Sardinia each had their own time zones from 1866 to 1893,
# called Palermo Time (+00:53:28) and Cagliari Time (+00:36:32).
# During World War II, German-controlled Italy used German time.
# But these events all occurred before the 1970 cutoff,
# so record only the time in Rome.
#
# From Stephen Trainor (2019-05-06):
# http://www.ac-ilsestante.it/MERIDIANE/ora_legale/ORA_LEGALE_ESTIVA_IN_ITALIA.htm
# ... the [1866] law went into effect on 12 December 1866, rather than
# the date of the decree (22 Sep 1866)
# https://web.archive.org/web/20070824155341/http://www.iav.it/planetario/didastro/didastro/english.htm
# ... "In Italy in 1866 there were 6 railway times (Torino, Verona, Firenze,
# Roma, Napoli, Palermo). On that year it was decided to unify them, adopting
# the average time of Rome (even if this city was not yet part of the
# kingdom).  On the 12th December 1866, on the starting of the winter time
# table, it took effect in the railways, the post office and the telegraph,
# not only for the internal service but also for the public....  Milano set
# the public watches on the Rome time on the same day (12th December 1866),
# Torino and Bologna on the 1st January 1867, Venezia the 1st May 1880 and the
# last city was Cagliari in 1886."
#
# From Luigi Rosa (2019-05-07):
# this is the scan of the decree:
# http://www.radiomarconi.com/marconi/filopanti/1866c.jpg
#
# From Michael Deckers (2016-10-24):
# http://www.ac-ilsestante.it/MERIDIANE/ora_legale quotes a law of 1893-08-10
# ... [translated as] "The preceding dispositions will enter into
# force at the instant at which, according to the time specified in
# the 1st article, the 1st of November 1893 will begin...."
#
# From Pierpaolo Bernardi (2016-10-20):
# The authoritative source for time in Italy is the national metrological
# institute, which has a summary page of historical DST data at
# http://www.inrim.it/res/tf/ora_legale_i.shtml
# [now at http://oldsite.inrim.it/res/tf/ora_legale_i.shtml as of 2017]
# (2016-10-24):
# http://www.renzobaldini.it/le-ore-legali-in-italia/
# has still different data for 1944.  It divides Italy in two, as
# there were effectively two governments at the time, north of Gothic
# Line German controlled territory, official government RSI, and south
# of the Gothic Line, controlled by allied armies.
#
# From Brian Inglis (2016-10-23):
# Viceregal LEGISLATIVE DECREE. 14 September 1944, no. 219.
# Restoration of Standard Time. (044U0219) (OJ 62 of 30.9.1944) ...
# Given the R. law decreed on 1944-03-29, no. 92, by which standard time is
# advanced to sixty minutes later starting at hour two on 1944-04-02; ...
# Starting at hour three on the date 1944-09-17 standard time will be resumed.
#
# From Alois Treindl (2019-07-02):
# I spent 6 Euros to buy two archive copies of Il Messaggero, a Roman paper,
# for 1 and 2 April 1944.  The edition of 2 April has this note: "Tonight at 2
# am, put forward the clock by one hour.  Remember that in the night between
# today and Monday the 'ora legale' will come in force again."  That makes it
# clear that in Rome the change was on Monday, 3 April 1944 at 2 am.
#
# From Paul Eggert (2021-10-05):
# Go with INRiM for DST rules, except as corrected by Inglis for 1944
# for the Kingdom of Italy.  This is consistent with Renzo Baldini.
# Model Rome's occupation by using C-Eur rules from 1943-09-10
# to 1944-06-04; although Rome was an open city during this period, it
# was effectively controlled by Germany.  Using C-Eur is consistent
# with Treindl's comment about Rome in April 1944, as the "Rule Italy"
# lines during German occupation do not affect Europe/Rome
# (though they do affect Europe/Malta).
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Italy	1916	only	-	Jun	 3	24:00	1:00	S
Rule	Italy	1916	1917	-	Sep	30	24:00	0	-
Rule	Italy	1917	only	-	Mar	31	24:00	1:00	S
Rule	Italy	1918	only	-	Mar	 9	24:00	1:00	S
Rule	Italy	1918	only	-	Oct	 6	24:00	0	-
Rule	Italy	1919	only	-	Mar	 1	24:00	1:00	S
Rule	Italy	1919	only	-	Oct	 4	24:00	0	-
Rule	Italy	1920	only	-	Mar	20	24:00	1:00	S
Rule	Italy	1920	only	-	Sep	18	24:00	0	-
Rule	Italy	1940	only	-	Jun	14	24:00	1:00	S
Rule	Italy	1942	only	-	Nov	 2	 2:00s	0	-
Rule	Italy	1943	only	-	Mar	29	 2:00s	1:00	S
Rule	Italy	1943	only	-	Oct	 4	 2:00s	0	-
Rule	Italy	1944	only	-	Apr	 2	 2:00s	1:00	S
Rule	Italy	1944	only	-	Sep	17	 2:00s	0	-
Rule	Italy	1945	only	-	Apr	 2	 2:00	1:00	S
Rule	Italy	1945	only	-	Sep	15	 1:00	0	-
Rule	Italy	1946	only	-	Mar	17	 2:00s	1:00	S
Rule	Italy	1946	only	-	Oct	 6	 2:00s	0	-
Rule	Italy	1947	only	-	Mar	16	 0:00s	1:00	S
Rule	Italy	1947	only	-	Oct	 5	 0:00s	0	-
Rule	Italy	1948	only	-	Feb	29	 2:00s	1:00	S
Rule	Italy	1948	only	-	Oct	 3	 2:00s	0	-
Rule	Italy	1966	1968	-	May	Sun>=22	 0:00s	1:00	S
Rule	Italy	1966	only	-	Sep	24	24:00	0	-
Rule	Italy	1967	1969	-	Sep	Sun>=22	 0:00s	0	-
Rule	Italy	1969	only	-	Jun	 1	 0:00s	1:00	S
Rule	Italy	1970	only	-	May	31	 0:00s	1:00	S
Rule	Italy	1970	only	-	Sep	lastSun	 0:00s	0	-
Rule	Italy	1971	1972	-	May	Sun>=22	 0:00s	1:00	S
Rule	Italy	1971	only	-	Sep	lastSun	 0:00s	0	-
Rule	Italy	1972	only	-	Oct	 1	 0:00s	0	-
Rule	Italy	1973	only	-	Jun	 3	 0:00s	1:00	S
Rule	Italy	1973	1974	-	Sep	lastSun	 0:00s	0	-
Rule	Italy	1974	only	-	May	26	 0:00s	1:00	S
Rule	Italy	1975	only	-	Jun	 1	 0:00s	1:00	S
Rule	Italy	1975	1977	-	Sep	lastSun	 0:00s	0	-
Rule	Italy	1976	only	-	May	30	 0:00s	1:00	S
Rule	Italy	1977	1979	-	May	Sun>=22	 0:00s	1:00	S
Rule	Italy	1978	only	-	Oct	 1	 0:00s	0	-
Rule	Italy	1979	only	-	Sep	30	 0:00s	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Rome	0:49:56 -	LMT	1866 Dec 12
			0:49:56	-	RMT	1893 Oct 31 23:00u # Rome Mean
			1:00	Italy	CE%sT	1943 Sep 10
			1:00	C-Eur	CE%sT	1944 Jun  4
			1:00	Italy	CE%sT	1980
			1:00	EU	CE%sT

# Latvia

# From Liene Kanepe (1998-09-17):

# I asked about this matter Scientific Secretary of the Institute of Astronomy
# of The University of Latvia Dr. paed Mr. Ilgonis Vilks. I also searched the
# correct data in juridical acts and I found some juridical documents about
# changes in the counting of time in Latvia from 1981....
#
# Act No. 35 of the Council of Ministers of Latvian SSR of 1981-01-22 ...
# according to the Act No. 925 of the Council of Ministers of USSR of 1980-10-24
# ...: all year round the time of 2nd time zone + 1 hour, in addition turning
# the hands of the clock 1 hour forward on 1 April at 00:00 (GMT 31 March 21:00)
# and 1 hour backward on the 1 October at 00:00 (GMT 30 September 20:00).
#
# Act No. 592 of the Council of Ministers of Latvian SSR of 1984-09-24 ...
# according to the Act No. 967 of the Council of Ministers of USSR of 1984-09-13
# ...: all year round the time of 2nd time zone + 1 hour, in addition turning
# the hands of the clock 1 hour forward on the last Sunday of March at 02:00
# (GMT 23:00 on the previous day) and 1 hour backward on the last Sunday of
# September at 03:00 (GMT 23:00 on the previous day).
#
# Act No. 81 of the Council of Ministers of Latvian SSR of 1989-03-22 ...
# according to the Act No. 227 of the Council of Ministers of USSR of 1989-03-14
# ...: since the last Sunday of March 1989 in Lithuanian SSR, Latvian SSR,
# Estonian SSR and Kaliningrad region of Russian Federation all year round the
# time of 2nd time zone (Moscow time minus one hour). On the territory of Latvia
# transition to summer time is performed on the last Sunday of March at 02:00
# (GMT 00:00), turning the hands of the clock 1 hour forward.  The end of
# daylight saving time is performed on the last Sunday of September at 03:00
# (GMT 00:00), turning the hands of the clock 1 hour backward. Exception is
# 1989-03-26, when we must not turn the hands of the clock....
#
# The Regulations of the Cabinet of Ministers of the Republic of Latvia of
# 1997-01-21 on transition to Summer time ... established the same order of
# daylight savings time settings as in the States of the European Union.

# From Andrei Ivanov (2000-03-06):
# This year Latvia will not switch to Daylight Savings Time (as specified in
# The Regulations of the Cabinet of Ministers of the Rep. of Latvia of
# 29-Feb-2000 (No. 79) <http://www.lv-laiks.lv/wwwraksti/2000/071072/vd4.htm>,
# in Latvian for subscribers only).

# From RFE/RL Newsline
# http://www.rferl.org/newsline/2001/01/3-CEE/cee-030101.html
# (2001-01-03), noted after a heads-up by Rives McDow:
# The Latvian government on 2 January decided that the country will
# institute daylight-saving time this spring, LETA reported.
# Last February the three Baltic states decided not to turn back their
# clocks one hour in the spring....
# Minister of Economy Aigars Kalvītis noted that Latvia had too few
# daylight hours and thus decided to comply with a draft European
# Commission directive that provides for instituting daylight-saving
# time in EU countries between 2002 and 2006. The Latvian government
# urged Lithuania and Estonia to adopt a similar time policy, but it
# appears that they will not do so....

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Latvia	1989	1996	-	Mar	lastSun	 2:00s	1:00	S
Rule	Latvia	1989	1996	-	Sep	lastSun	 2:00s	0	-

# Milne 1899 says Riga was 1:36:28 (Polytechnique House time).
# Byalokoz 1919 says Latvia was 1:36:34.
# Go with Byalokoz.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Riga	1:36:34	-	LMT	1880
			1:36:34	-	RMT	1918 Apr 15  2:00 # Riga MT
			1:36:34	1:00	LST	1918 Sep 16  3:00 # Latvian ST
			1:36:34	-	RMT	1919 Apr  1  2:00
			1:36:34	1:00	LST	1919 May 22  3:00
			1:36:34	-	RMT	1926 May 11
			2:00	-	EET	1940 Aug  5
			3:00	-	MSK	1941 Jul
			1:00	C-Eur	CE%sT	1944 Oct 13
			3:00	Russia	MSK/MSD	1989 Mar lastSun  2:00s
			2:00	1:00	EEST	1989 Sep lastSun  2:00s
			2:00	Latvia	EE%sT	1997 Jan 21
			2:00	EU	EE%sT	2000 Feb 29
			2:00	-	EET	2001 Jan  2
			2:00	EU	EE%sT

# Lithuania

# From Paul Eggert (2016-03-18):
# The 1989 transition is from USSR act No. 227 (1989-03-14).

# From Paul Eggert (1996-11-22):
# IATA SSIM (1992/1996) says Lithuania uses W-Eur rules, but since it is
# known to be wrong about Estonia and Latvia, assume it's wrong here too.

# From Marius Gedminas (1998-08-07):
# I would like to inform that in this year Lithuanian time zone
# (Europe/Vilnius) was changed.

# From ELTA No. 972 (2582) (1999-09-29) <http://www.elta.lt/>,
# via Steffen Thorsen:
# Lithuania has shifted back to the second time zone (GMT plus two hours)
# to be valid here starting from October 31,
# as decided by the national government on Wednesday....
# The Lithuanian government also announced plans to consider a
# motion to give up shifting to summer time in spring, as it was
# already done by Estonia.

# From the Fact File, Lithuanian State Department of Tourism
# <http://www.tourism.lt/informa/ff.htm> (2000-03-27):
# Local time is GMT+2 hours ..., no daylight saving.

# From a user via Klaus Marten (2003-02-07):
# As a candidate for membership of the European Union, Lithuania will
# observe Summer Time in 2003, changing its clocks at the times laid
# down in EU Directive 2000/84 of 19.I.01 (i.e. at the same times as its
# neighbour Latvia). The text of the Lithuanian government Order of
# 7.XI.02 to this effect can be found at
# http://www.lrvk.lt/nut/11/n1749.htm


# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Vilnius	1:41:16	-	LMT	1880
			1:24:00	-	WMT	1917        # Warsaw Mean Time
			1:35:36	-	KMT	1919 Oct 10 # Kaunas Mean Time
			1:00	-	CET	1920 Jul 12
			2:00	-	EET	1920 Oct  9
			1:00	-	CET	1940 Aug  3
			3:00	-	MSK	1941 Jun 24
			1:00	C-Eur	CE%sT	1944 Aug
			3:00	Russia	MSK/MSD	1989 Mar 26  2:00s
			2:00	Russia	EE%sT	1991 Sep 29  2:00s
			2:00	C-Eur	EE%sT	1998
			2:00	-	EET	1998 Mar 29  1:00u
			1:00	EU	CE%sT	1999 Oct 31  1:00u
			2:00	-	EET	2003 Jan  1
			2:00	EU	EE%sT

# Malta
#
# From Paul Eggert (2016-10-21):
# Assume 1900-1972 was like Rome, overriding Shanks.
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Malta	1973	only	-	Mar	31	0:00s	1:00	S
Rule	Malta	1973	only	-	Sep	29	0:00s	0	-
Rule	Malta	1974	only	-	Apr	21	0:00s	1:00	S
Rule	Malta	1974	only	-	Sep	16	0:00s	0	-
Rule	Malta	1975	1979	-	Apr	Sun>=15	2:00	1:00	S
Rule	Malta	1975	1980	-	Sep	Sun>=15	2:00	0	-
Rule	Malta	1980	only	-	Mar	31	2:00	1:00	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Malta	0:58:04 -	LMT	1893 Nov  2 # Valletta
			1:00	Italy	CE%sT	1973 Mar 31
			1:00	Malta	CE%sT	1981
			1:00	EU	CE%sT

# Moldova

# From Stepan Golosunov (2016-03-07):
# the act of the government of the Republic of Moldova Nr. 132 from 1990-05-04
# http://lex.justice.md/viewdoc.php?action=view&view=doc&id=298782&lang=2
# ... says that since 1990-05-06 on the territory of the Moldavian SSR
# time would be calculated as the standard time of the second time belt
# plus one hour of the "summer" time. To implement that clocks would be
# adjusted one hour backwards at 1990-05-06 2:00. After that "summer"
# time would be cancelled last Sunday of September at 3:00 and
# reintroduced last Sunday of March at 2:00.

# From Paul Eggert (2006-03-22):
# A previous version of this database followed Shanks & Pottenger, who write
# that Tiraspol switched to Moscow time on 1992-01-19 at 02:00.
# However, this is most likely an error, as Moldova declared independence
# on 1991-08-27 (the 1992-01-19 date is that of a Russian decree).
# In early 1992 there was large-scale interethnic violence in the area
# and it's possible that some Russophones continued to observe Moscow time.
# But [two people] separately reported via
# Jesper Nørgaard that as of 2001-01-24 Tiraspol was like Chisinau.
# The Tiraspol entry has therefore been removed for now.
#
# From Alexander Krivenyshev (2011-10-17):
# Pridnestrovian Moldavian Republic (PMR, also known as
# "Pridnestrovie") has abolished seasonal clock change (no transition
# to the Winter Time).
#
# News (in Russian):
# http://www.kyivpost.ua/russia/news/pridnestrove-otkazalos-ot-perehoda-na-zimnee-vremya-30954.html
# http://www.allmoldova.com/moldova-news/1249064116.html
#
# The substance of this change (reinstatement of the Tiraspol entry)
# is from a patch from Petr Machata (2011-10-17)
#
# From Tim Parenti (2011-10-19)
# In addition, being situated at +4651+2938 would give Tiraspol
# a pre-1880 LMT offset of 1:58:32.
#
# (which agrees with the earlier entry that had been removed)
#
# From Alexander Krivenyshev (2011-10-26)
# NO need to divide Moldova into two timezones at this point.
# As of today, Transnistria (Pridnestrovie)- Tiraspol reversed its own
# decision to abolish DST this winter.
# Following Moldova and neighboring Ukraine- Transnistria (Pridnestrovie)-
# Tiraspol will go back to winter time on October 30, 2011.
# News from Moldova (in russian):
# https://ru.publika.md/link_317061.html

# From Roman Tudos (2015-07-02):
# http://lex.justice.md/index.php?action=view&view=doc&lang=1&id=355077
# From Paul Eggert (2015-07-01):
# The abovementioned official link to IGO1445-868/2014 states that
# 2014-10-26's fallback transition occurred at 03:00 local time.  Also,
# https://www.trm.md/en/social/la-30-martie-vom-trece-la-ora-de-vara
# says the 2014-03-30 spring-forward transition was at 02:00 local time.
# Guess that since 1997 Moldova has switched one hour before the EU.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Moldova	1997	max	-	Mar	lastSun	 2:00	1:00	S
Rule	Moldova	1997	max	-	Oct	lastSun	 3:00	0	-

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Chisinau	1:55:20 -	LMT	1880
			1:55	-	CMT	1918 Feb 15 # Chisinau MT
			1:44:24	-	BMT	1931 Jul 24 # Bucharest MT
			2:00	Romania	EE%sT	1940 Aug 15
			2:00	1:00	EEST	1941 Jul 17
			1:00	C-Eur	CE%sT	1944 Aug 24
			3:00	Russia	MSK/MSD	1990 May  6  2:00
			2:00	Russia	EE%sT	1992
			2:00	E-Eur	EE%sT	1997
# See Romania commentary for the guessed 1997 transition to EU rules.
			2:00	Moldova	EE%sT

# Poland

# The 1919 dates and times can be found in Tygodnik Urzędowy nr 1 (1919-03-20),
# <http://www.wbc.poznan.pl/publication/32156> pp 1-2.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Poland	1918	1919	-	Sep	16	2:00s	0	-
Rule	Poland	1919	only	-	Apr	15	2:00s	1:00	S
Rule	Poland	1944	only	-	Apr	 3	2:00s	1:00	S
# Whitman gives 1944 Nov 30; go with Shanks & Pottenger.
Rule	Poland	1944	only	-	Oct	 4	2:00	0	-
# For 1944-1948 Whitman gives the previous day; go with Shanks & Pottenger.
Rule	Poland	1945	only	-	Apr	29	0:00	1:00	S
Rule	Poland	1945	only	-	Nov	 1	0:00	0	-
# For 1946 on the source is Kazimierz Borkowski,
# Toruń Center for Astronomy, Dept. of Radio Astronomy, Nicolaus Copernicus U.,
# https://www.astro.uni.torun.pl/~kb/Artykuly/U-PA/Czas2.htm#tth_tAb1
# Thanks to Przemysław Augustyniak (2005-05-28) for this reference.
# He also gives these further references:
# Mon Pol nr 13, poz 162 (1995) <http://www.abc.com.pl/serwis/mp/1995/0162.htm>
# Druk nr 2180 (2003) <http://www.senat.gov.pl/k5/dok/sejm/053/2180.pdf>
Rule	Poland	1946	only	-	Apr	14	0:00s	1:00	S
Rule	Poland	1946	only	-	Oct	 7	2:00s	0	-
Rule	Poland	1947	only	-	May	 4	2:00s	1:00	S
Rule	Poland	1947	1949	-	Oct	Sun>=1	2:00s	0	-
Rule	Poland	1948	only	-	Apr	18	2:00s	1:00	S
Rule	Poland	1949	only	-	Apr	10	2:00s	1:00	S
Rule	Poland	1957	only	-	Jun	 2	1:00s	1:00	S
Rule	Poland	1957	1958	-	Sep	lastSun	1:00s	0	-
Rule	Poland	1958	only	-	Mar	30	1:00s	1:00	S
Rule	Poland	1959	only	-	May	31	1:00s	1:00	S
Rule	Poland	1959	1961	-	Oct	Sun>=1	1:00s	0	-
Rule	Poland	1960	only	-	Apr	 3	1:00s	1:00	S
Rule	Poland	1961	1964	-	May	lastSun	1:00s	1:00	S
Rule	Poland	1962	1964	-	Sep	lastSun	1:00s	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Warsaw	1:24:00 -	LMT	1880
			1:24:00	-	WMT	1915 Aug  5 # Warsaw Mean Time
			1:00	C-Eur	CE%sT	1918 Sep 16  3:00
			2:00	Poland	EE%sT	1922 Jun
			1:00	Poland	CE%sT	1940 Jun 23  2:00
			1:00	C-Eur	CE%sT	1944 Oct
			1:00	Poland	CE%sT	1977
			1:00	W-Eur	CE%sT	1988
			1:00	EU	CE%sT

# Portugal

# From Tim Parenti (2024-07-01), per Alois Treindl (2021-02-07) and Michael
# Deckers (2021-02-10):
# http://oal.ul.pt/documentos/2018/01/hl1911a2018.pdf/
# The Astronomical Observatory of Lisbon has published a list detailing the
# historical transitions in legal time within continental Portugal.  It
# directly references many decrees and ordinances which are, in turn,
# referenced below.  They can be viewed in the public archives of the Diário da
# República (until 1976-04-09 known as the Diário do Govêrno) at
# https://dre.pt/ (in Portuguese).
#
# Most of the Rules below have been updated simply to match the Observatory's
# listing for continental (mainland) Portugal.  Although there are over 50
# referenced decrees and ordinances, only the handful with comments below have
# been verified against the text, typically to provide additional confidence
# wherever dates provided by Whitman and Shanks & Pottenger had disagreed.
# See further below for the Azores and Madeira.

# From Tim Parenti (2024-07-01), per Paul Eggert (2014-08-11), after a
# heads-up from Stephen Colebourne:
# According to a 1911-05-24 Portuguese decree, Lisbon was at -0:36:44.68, but
# switched to GMT on 1912-01-01 at 00:00.
# https://dre.pt/dr/detalhe/decreto/593090
# https://dre.pt/application/conteudo/593090
# The decree made legal time throughout Portugal and her possessions
# "subordinate to the Greenwich meridian, according to the principle adopted at
# the Washington Convention in 1884" and eliminated the "difference of five
# minutes between the internal and external clocks of railway stations".
#
# The decree was gazetted in the 1911-05-30 issue of Diário do Govêrno, and is
# considered to be dated 1911-05-24 by that issue's summary; however, the text
# of the decree itself is dated 1911-05-26.  The Diário da República website
# notes the discrepancy, but later laws and the Observatory all seem to refer
# to this decree by the 1911-05-24 date.
#
# From Michael Deckers (2018-02-15):
# article 5 [of the 1911 decree; Deckers's translation] ...:
# These dispositions shall enter into force at the instant at which,
# according to the 2nd article, the civil day January 1, 1912 begins,
# all clocks therefore having to be advanced or set back correspondingly ...

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
# From Tim Parenti (2024-07-01), per Paul Eggert (1999-01-30):
# DSH writes in their history that Decreto 1469 of 1915-03-30 established
# summer time and that, "despite" this, the change to the clocks was not done
# every year, depending on what Spain did, because of railroad schedules.
# In fact, that decree had nothing to do with DST; rather, it regulated the
# sending of time signals.  But we do see linkage to Spain in the 1920s below.
# https://dre.pt/dr/detalhe/decreto/1469-1915-285721
# https://dre.pt/application/conteudo/285721
#
# According to the Observatory, standard time was first advanced by Decreto
# 2433 of 1916-06-09 and restored by Decreto 2712 of 1916-10-28.  While Whitman
# gives 1916-10-31 for the latter transition, Shanks & Pottenger agrees more
# closely with the decree, which stated that its provision "will start sixty
# minutes after the end of 31 October, according to the current time," i.e.,
# 01:00 on 1 November.
# https://dre.pt/dr/detalhe/decreto/2433-1916-267192
# https://dre.pt/application/conteudo/267192
# https://dre.pt/dr/detalhe/decreto/2712-1916-590937
# https://dre.pt/application/conteudo/590937
Rule	Port	1916	only	-	Jun	17	23:00	1:00	S
Rule	Port	1916	only	-	Nov	 1	 1:00	0	-
# From Tim Parenti (2024-07-01):
# Article 7 of Decreto 2922 of 1916-12-30 stated that "the legal time will be
# advanced by sixty minutes from 1 March to 31 October."  Per Article 15, this
# came into force from 1917-01-01.  Just before the first fall back, Decreto
# 3446 of 1917-10-11 changed the annual end date to 14 October.
# https://dre.pt/dr/detalhe/decreto/2922-1916-261894
# https://dre.pt/application/conteudo/261894
# https://dre.pt/dr/detalhe/decreto/3446-1917-495161
# https://dre.pt/application/conteudo/495161
# This annual change was revoked by Decreto 8038 of 1922-02-18.
# https://dre.pt/dr/detalhe/decreto/8038-1922-569751
# https://dre.pt/application/conteudo/569751
Rule	Port	1917	1921	-	Mar	 1	 0:00	1:00	S
Rule	Port	1917	1921	-	Oct	14	24:00	0	-
# From Tim Parenti (2024-07-01):
# Decreto 9592 of 1924-04-14 noted that "France maintains the advance of legal
# time in the summer and Spain has now adopted it for the first time" and
# considered "that the absence of similar measures would cause serious
# difficulties for international rail connections with consequent repercussions
# on domestic service hours..." along with "inconvenient analogues...for postal
# and telegraph services."  Summer time would be in effect from 17 April to 4
# October, with the spring change explicitly specified by bringing clocks
# forward from 16 April 23:00.
# https://dre.pt/dr/detalhe/decreto/9592-1924-652133
# https://dre.pt/application/conteudo/652133
#
# Decreto 10700, issued 1925-04-16, noted that Spain had not continued summer
# time, declared that "the current legal hour prior to 17 April remains
# unchanged from that day forward", and revoked legislation to the contrary,
# just a day before summer time would have otherwise resumed.
# https://dre.pt/dr/detalhe/decreto/10700-1925-437826
# https://dre.pt/application/conteudo/437826
Rule	Port	1924	only	-	Apr	16	23:00s	1:00	S
Rule	Port	1924	only	-	Oct	 4	23:00s	0	-
Rule	Port	1926	only	-	Apr	17	23:00s	1:00	S
Rule	Port	1926	1929	-	Oct	Sat>=1	23:00s	0	-
Rule	Port	1927	only	-	Apr	 9	23:00s	1:00	S
Rule	Port	1928	only	-	Apr	14	23:00s	1:00	S
Rule	Port	1929	only	-	Apr	20	23:00s	1:00	S
Rule	Port	1931	only	-	Apr	18	23:00s	1:00	S
# Whitman gives 1931 Oct 8; go with Shanks & Pottenger.
Rule	Port	1931	1932	-	Oct	Sat>=1	23:00s	0	-
Rule	Port	1932	only	-	Apr	 2	23:00s	1:00	S
Rule	Port	1934	only	-	Apr	 7	23:00s	1:00	S
# Whitman gives 1934 Oct 5; go with Shanks & Pottenger.
# Note: The 1935 law specified 10-06 00:00, not 10-05 24:00, but the following
# is equivalent and more succinct.
Rule	Port	1934	1938	-	Oct	Sat>=1	23:00s	0	-
# Shanks & Pottenger give 1935 Apr 30; go with Whitman.
Rule	Port	1935	only	-	Mar	30	23:00s	1:00	S
Rule	Port	1936	only	-	Apr	18	23:00s	1:00	S
# Whitman gives 1937 Apr 2; go with Shanks & Pottenger.
Rule	Port	1937	only	-	Apr	 3	23:00s	1:00	S
Rule	Port	1938	only	-	Mar	26	23:00s	1:00	S
Rule	Port	1939	only	-	Apr	15	23:00s	1:00	S
# Whitman gives 1939 Oct 7; go with Shanks & Pottenger.
Rule	Port	1939	only	-	Nov	18	23:00s	0	-
# From Tim Parenti (2024-07-01):
# Portaria 9465 of 1940-02-17 advanced clocks from Saturday 1940-02-24 23:00.
# The clocks were restored by Portaria 9658, issued Monday 1940-10-07,
# effective from 24:00 that very night, which agrees with Shanks & Pottenger;
# Whitman gives Saturday 1940-10-05 instead.
# https://dre.pt/dr/detalhe/portaria/9465-1940-189096
# https://dre.pt/application/conteudo/189096
# https://dre.pt/dr/detalhe/portaria/9658-1940-196729
# https://dre.pt/application/conteudo/196729
Rule	Port	1940	only	-	Feb	24	23:00s	1:00	S
Rule	Port	1940	only	-	Oct	 7	23:00s	0	-
Rule	Port	1941	only	-	Apr	 5	23:00s	1:00	S
Rule	Port	1941	only	-	Oct	 5	23:00s	0	-
Rule	Port	1942	1945	-	Mar	Sat>=8	23:00s	1:00	S
Rule	Port	1942	only	-	Apr	25	22:00s	2:00	M # Midsummer
Rule	Port	1942	only	-	Aug	15	22:00s	1:00	S
Rule	Port	1942	1945	-	Oct	Sat>=24	23:00s	0	-
Rule	Port	1943	only	-	Apr	17	22:00s	2:00	M
Rule	Port	1943	1945	-	Aug	Sat>=25	22:00s	1:00	S
Rule	Port	1944	1945	-	Apr	Sat>=21	22:00s	2:00	M
Rule	Port	1946	only	-	Apr	Sat>=1	23:00s	1:00	S
Rule	Port	1946	only	-	Oct	Sat>=1	23:00s	0	-
# From Tim Parenti (2024-07-01), per Alois Treindl (2021-02-07):
# The Astronomical Observatory of Lisbon cites Portaria 11767 of 1947-03-28 for
# 1947 and Portaria 12286 of 1948-02-19 for 1948.
# https://dre.pt/dr/detalhe/portaria/11767-1947-414787
# https://dre.pt/application/conteudo/414787
# https://dre.pt/dr/detalhe/portaria/12286-1948-152953
# https://dre.pt/application/conteudo/152953
#
# Although the latter ordinance explicitly had the 1948-10-03 transition
# scheduled for 02:00 rather than 03:00 as had been used in 1947, Decreto-Lei
# 37048 of 1948-09-07 recognized "that it is advisable to definitely set...the
# 'summer time' regime", and fixed the fall transition at 03:00 moving forward.
# https://dre.pt/dr/detalhe/decreto-lei/37048-1948-373810
# https://dre.pt/application/conteudo/373810
# While the Observatory only cites this act for 1949-1965 and not for 1948, it
# does not appear to have had any provision delaying its effect, so assume that
# it overrode the prior ordinance for 1948-10-03.
#
# Whitman says DST was not observed in 1950 and gives Oct lastSun for 1952 on.
# The Observatory, however, agrees with Shanks & Pottenger that 1950 was not an
# exception and that Oct Sun>=1 was maintained through 1965.
Rule	Port	1947	1966	-	Apr	Sun>=1	 2:00s	1:00	S
Rule	Port	1947	1965	-	Oct	Sun>=1	 2:00s	0	-
# From Tim Parenti (2024-07-01):
# Decreto-Lei 47233 of 1966-10-01 considered that the "duality" in time was
# "the cause of serious disturbances" and noted that "the countries with which
# we have the most frequent contacts...have already adopted" a solution
# coinciding with the extant "summer time".  It established that the former
# "summer time" would apply year-round on the mainland and adjacent islands
# with immediate effect, as the fall back would have otherwise occurred later
# that evening.
# https://dre.pt/dr/detalhe/decreto-lei/47233-1966-293729
# Model this by changing zones without changing clocks at the
# previously-appointed fall back time.
#
# Decreto-Lei 309/76 of 1976-04-27 acknowledged that those international
# contacts had returned to adopting seasonal times, and considered that the
# year-round advancement "entails considerable sacrifices for the vast majority
# of the working population during the winter months", including morning
# visibility concerns for schoolchildren.  It specified, beginning 1976-09-26
# 01:00, an annual return to UT+00 on the mainland from 00:00 UT on Sep lastSun
# to 00:00 UT on Mar lastSun (unless the latter date fell on Easter, in which
# case it was to be brought forward to the preceding Sunday).  It also assigned
# the Permanent Time Commission to study and propose revisions for the Azores
# and Madeira, neither of which resumed DST until 1982 (as described further
# below).
# https://dre.pt/dr/detalhe/decreto-lei/309-1976-502063
Rule	Port	1976	only	-	Sep	lastSun	 1:00	0	-
Rule	Port	1977	only	-	Mar	lastSun	 0:00s	1:00	S
Rule	Port	1977	only	-	Sep	lastSun	 0:00s	0	-
# From Tim Parenti (2024-07-01):
# Beginning in 1978, rather than triggering the Easter rule of the 1976 decree
# (Easter fell on 1978-03-26), Article 5 was used instead, which allowed DST
# dates to be changed by order of the Minister of Education and Scientific
# Research, upon consultation with the Permanent Time Commission, "whenever
# considered convenient."  As such, a series of one-off ordinances were
# promulgated for the mainland in 1978 through 1980, after which the 1976
# decree naturally came back into force from 1981.
Rule	Port	1978	1980	-	Apr	Sun>=1	 1:00s	1:00	S
Rule	Port	1978	only	-	Oct	 1	 1:00s	0	-
Rule	Port	1979	1980	-	Sep	lastSun	 1:00s	0	-
Rule	Port	1981	1986	-	Mar	lastSun	 0:00s	1:00	S
Rule	Port	1981	1985	-	Sep	lastSun	 0:00s	0	-
# From Tim Parenti (2024-07-01):
# Decreto-Lei 44-B/86 of 1986-03-07 switched mainland Portugal's transition
# times from 0:00s to 1:00u to harmonize with the EEC from 1986-03-30.
# https://dre.pt/dr/detalhe/decreto-lei/44-b-1986-628280
# (Transitions of 1:00s as previously reported and used by the W-Eur rules,
# though equivalent, appear to have been fiction here.)  Madeira continued to
# use 0:00s for spring 1986 before joining with the mainland using 1:00u in the
# fall; meanwhile, in the Azores the two were equivalent, so the law specifying
# 0:00s wasn't touched until 1992.  (See below for more on the islands.)
#
# From Rui Pedro Salgueiro (1992-11-12):
# Portugal has recently (September, 27) changed timezone
# (from WET to MET or CET) to harmonize with EEC.
#
# Martin Bruckmann (1996-02-29) reports via Peter Ilieve
# that Portugal is reverting to 0:00 by not moving its clocks this spring.
# The new Prime Minister was fed up with getting up in the dark in the winter.
#
# From Paul Eggert (1996-11-12):
# IATA SSIM (1991-09) reports several 1991-09 and 1992-09 transitions
# at 02:00u, not 01:00u.  Assume that these are typos.
#
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
		#STDOFF	-0:36:44.68
Zone	Europe/Lisbon	-0:36:45 -	LMT	1884
			-0:36:45 -	LMT	1912 Jan  1  0:00u # Lisbon MT
			 0:00	Port	WE%sT	1966 Oct  2  2:00s
			 1:00	-	CET	1976 Sep 26  1:00
			 0:00	Port	WE%sT	1986
			 0:00	EU	WE%sT	1992 Sep 27  1:00u
			 1:00	EU	CE%sT	1996 Mar 31  1:00u
			 0:00	EU	WE%sT

# From Tim Parenti (2024-07-01):
# For the Azores and Madeira, legislation was followed from the laws currently
# in force as listed at:
# https://oal.ul.pt/hora-legal/legislacao/
# working backward through references of revocation and abrogation to
# Decreto-Lei 47233 of 1966-10-01, the last time DST was abolished across the
# mainland and its adjacent islands.  Because of that reference, it is
# therefore assumed that DST rules in the islands prior to 1966 were like that
# of the mainland, though most legislation of the time didn't explicitly
# specify DST practices for the islands.
Zone Atlantic/Azores	-1:42:40 -	LMT	1884        # Ponta Delgada
			-1:54:32 -	HMT	1912 Jan  1  2:00u # Horta MT
# Vanguard section, for zic and other parsers that support %z.
			-2:00	Port	%z	1966 Oct  2  2:00s
# From Tim Parenti (2024-07-01):
# While Decreto-Lei 309/76 of 1976-04-27 reintroduced DST on the mainland by
# falling back on 1976-09-26, it assigned the Permanent Time Commission to
# study and propose revisions for the Azores and Madeira.  Decreto Regional
# 9/77/A of 1977-05-17 affirmed that "the legal time remained unchanged in the
# Azores" at UT-1, and would remain there year-round.
# https://dre.pt/dr/detalhe/decreto-regional/9-1977-252066
#
# Decreto Regional 2/82/A, published 1982-03-02, adopted DST in the same
# fashion as the mainland used at the time.
# https://dre.pt/dr/detalhe/decreto-regional/2-1982-599965
# Though transitions in the Azores officially remained at 0:00s through 1992,
# this was equivalent to the EU-style 1:00u adopted by the mainland in 1986, so
# model it as such.
			-1:00	-	%z	1982 Mar 28  0:00s
			-1:00	Port	%z	1986
# Rearguard section, for parsers lacking %z; see ziguard.awk.
#			-2:00	Port	-02/-01	1942 Apr 25 22:00s
#			-2:00	Port	+00	1942 Aug 15 22:00s
#			-2:00	Port	-02/-01	1943 Apr 17 22:00s
#			-2:00	Port	+00	1943 Aug 28 22:00s
#			-2:00	Port	-02/-01	1944 Apr 22 22:00s
#			-2:00	Port	+00	1944 Aug 26 22:00s
#			-2:00	Port	-02/-01	1945 Apr 21 22:00s
#			-2:00	Port	+00	1945 Aug 25 22:00s
#			-2:00	Port	-02/-01	1966 Oct  2  2:00s
#			-1:00	-	-01	1982 Mar 28  0:00s
#			-1:00	Port	-01/+00	1986
# End of rearguard section.
#
# From Paul Eggert (1996-11-12):
# IATA SSIM (1991/1992) reports that the Azores were at -1:00.
# IATA SSIM (1993-02) says +0:00; later issues (through 1996-09) say -1:00.
#
# From Tim Parenti (2024-07-01):
# After mainland Portugal had shifted forward an hour from 1992-09-27, Decreto
# Legislativo Regional 29/92/A of 1992-12-23 sought to "reduce the time
# difference" by shifting the Azores forward as well from 1992-12-27.  Just six
# months later, this was revoked by Decreto Legislativo Regional 9/93/A, citing
# "major changes in work habits and way of life."  Though the revocation didn't
# give a transition time, it was signed Wednesday 1993-06-16; assume it took
# effect later that evening, and that an EU-style spring forward (to +01) was
# still observed in the interim on 1993-03-28.
# https://dre.pt/dr/detalhe/decreto-legislativo-regional/29-1992-621553
# https://dre.pt/dr/detalhe/decreto-legislativo-regional/9-1993-389633
			-1:00	EU	%z	1992 Dec 27  1:00s
			 0:00	EU	WE%sT	1993 Jun 17  1:00u
			-1:00	EU	%z

Zone Atlantic/Madeira	-1:07:36 -	LMT	1884        # Funchal
			-1:07:36 -	FMT	1912 Jan  1  1:00u # Funchal MT
# Vanguard section, for zic and other parsers that support %z.
			-1:00	Port	%z	1966 Oct  2  2:00s
# Rearguard section, for parsers lacking %z; see ziguard.awk.
#			-1:00	Port	-01/+00	1942 Apr 25 22:00s
#			-1:00	Port	+01	1942 Aug 15 22:00s
#			-1:00	Port	-01/+00	1943 Apr 17 22:00s
#			-1:00	Port	+01	1943 Aug 28 22:00s
#			-1:00	Port	-01/+00	1944 Apr 22 22:00s
#			-1:00	Port	+01	1944 Aug 26 22:00s
#			-1:00	Port	-01/+00	1945 Apr 21 22:00s
#			-1:00	Port	+01	1945 Aug 25 22:00s
#			-1:00	Port	-01/+00	1966 Oct  2  2:00s
# End of rearguard section.
#
# From Tim Parenti (2024-07-01):
# Decreto Regional 5/82/M, published 1982-04-03, established DST transitions at
# 0:00u, which for Madeira is equivalent to the mainland's rules (0:00s) at the
# time.  It came into effect the day following its publication, Sunday
# 1982-04-04, thus resuming Madeira's DST practice about a week later than the
# mainland and the Azores.
# https://dre.pt/dr/detalhe/decreto-regional/5-1982-608273
#
# Decreto Legislativo Regional 18/86/M, published 1986-10-01, adopted EU-style
# rules (1:00u) and entered into immediate force after being signed on
# 1986-07-31.
# https://dre.pt/dr/detalhe/decreto-legislativo-regional/18-1986-221705
			 0:00	-	WET	1982 Apr  4
			 0:00	Port	WE%sT	1986 Jul 31
			 0:00	EU	WE%sT

# Romania
#
# From Paul Eggert (1999-10-07):
# Nine O'clock <http://www.nineoclock.ro/POL/1778pol.html>
# (1998-10-23) reports that the switch occurred at
# 04:00 local time in fall 1998.  For lack of better info,
# assume that Romania and Moldova switched to EU rules in 1997,
# the same year as Bulgaria.
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Romania	1932	only	-	May	21	 0:00s	1:00	S
Rule	Romania	1932	1939	-	Oct	Sun>=1	 0:00s	0	-
Rule	Romania	1933	1939	-	Apr	Sun>=2	 0:00s	1:00	S
Rule	Romania	1979	only	-	May	27	 0:00	1:00	S
Rule	Romania	1979	only	-	Sep	lastSun	 0:00	0	-
Rule	Romania	1980	only	-	Apr	 5	23:00	1:00	S
Rule	Romania	1980	only	-	Sep	lastSun	 1:00	0	-
Rule	Romania	1991	1993	-	Mar	lastSun	 0:00s	1:00	S
Rule	Romania	1991	1993	-	Sep	lastSun	 0:00s	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Europe/Bucharest	1:44:24 -	LMT	1891 Oct
			1:44:24	-	BMT	1931 Jul 24 # Bucharest MT
			2:00	Romania	EE%sT	1981 Mar 29  2:00s
			2:00	C-Eur	EE%sT	1991
			2:00	Romania	EE%sT	1994
			2:00	E-Eur	EE%sT	1997
			2:00	EU	EE%sT


# Russia

# From Alexander Krivenyshev (2011-09-15):
# Based on last Russian Government Decree No. 725 on August 31, 2011
# (Government document
# http://www.government.ru/gov/results/16355/print/
# in Russian)
# there are few corrections have to be made for some Russian time zones...
# All updated Russian Time Zones were placed in table and translated to English
# by WorldTimeZone.com at the link below:
# http://www.worldtimezone.com/dst_news/dst_news_russia36.htm

# From Sanjeev Gupta (2011-09-27):
# Scans of [Decree No. 23 of January 8, 1992] are available at:
# http://government.consultant.ru/page.aspx?1223966
# They are in Cyrillic letters (presumably Russian).

# From Arthur David Olson (2012-05-09):
# Regarding the instant when clocks in time-zone-shifting parts of Russia
# changed in September 2011:
#
# One source is
# http://government.ru/gov/results/16355/
# which, according to translate.google.com, begins "Decree of August 31,
# 2011 No. 725" and contains no other dates or "effective date" information.
#
# Another source is
# https://rg.ru/2011/09/06/chas-zona-dok.html
# which, according to translate.google.com, begins "Resolution of the
# Government of the Russian Federation on August 31, 2011 N 725" and also
# contains "Date first official publication: September 6, 2011 Posted on:
# in the 'RG' - Federal Issue No. 5573 September 6, 2011" but which
# does not contain any "effective date" information.
#
# Another source is
# https://en.wikipedia.org/wiki/Oymyakonsky_District#cite_note-RuTime-7
# which, in note 8, contains "Resolution No. 725 of August 31, 2011...
# Effective as of after 7 days following the day of the official publication"
# but which does not contain any reference to September 6, 2011.
#
# The Wikipedia article refers to
# http://base.consultant.ru/cons/cgi/online.cgi?req=doc;base=LAW;n=118896
# which seems to copy the text of the government.ru page.
#
# Tobias Conradi combines Wikipedia's
# "as of after 7 days following the day of the official publication"
# with www.rg.ru's "Date of first official publication: September 6, 2011" to
# get September 13, 2011 as the cutover date (unusually, a Tuesday, as Tobias
# Conradi notes).
#
# None of the sources indicates a time of day for changing clocks.
#
# Go with 2011-09-13 0:00s.

# From Alexander Krivenyshev (2014-07-01):
# According to the Russian news (ITAR-TASS News Agency)
# http://en.itar-tass.com/russia/738562
# the State Duma has approved ... the draft bill on returning to
# winter time standard and return Russia 11 time zones.  The new
# regulations will come into effect on October 26, 2014 at 02:00 ...
# http://asozd2.duma.gov.ru/main.nsf/(Spravka)?OpenAgent&RN=431985-6&02
# Here is a link where we put together table (based on approved Bill N
# 431985-6) with proposed 11 Russian time zones and corresponding
# areas/cities/administrative centers in the Russian Federation (in English):
# http://www.worldtimezone.com/dst_news/dst_news_russia65.html
#
# From Alexander Krivenyshev (2014-07-22):
# Putin signed the Federal Law 431985-6 ... (in Russian)
# http://itar-tass.com/obschestvo/1333711
# http://www.pravo.gov.ru:8080/page.aspx?111660
# http://www.kremlin.ru/acts/46279
# From October 26, 2014 the new Russian time zone map will look like this:
# http://www.worldtimezone.com/dst_news/dst_news_russia-map-2014-07.html

# From Paul Eggert (2006-03-22):
# Moscow time zone abbreviations after 1919-07-01, and Moscow rules after 1991,
# are from Andrey A. Chernov.  The rest is from Shanks & Pottenger,
# except we follow Chernov's report that 1992 DST transitions were Sat
# 23:00, not Sun 02:00s.
#
# From Stanislaw A. Kuzikowski (1994-06-29):
# But now it is some months since Novosibirsk is 3 hours ahead of Moscow!
# I do not know why they have decided to make this change;
# as far as I remember it was done exactly during winter->summer switching
# so we (Novosibirsk) simply did not switch.
#
# From Andrey A. Chernov (1996-10-04):
# 'MSK' and 'MSD' were born and used initially on Moscow computers with
# UNIX-like OSes by several developer groups (e.g. Demos group, Kiae group)....
# The next step was the UUCP network, the Relcom predecessor
# (used mainly for mail), and MSK/MSD was actively used there.
#
# From Chris Carrier (1996-10-30):
# According to a friend of mine who rode the Trans-Siberian Railroad from
# Moscow to Irkutsk in 1995, public air and rail transport in Russia ...
# still follows Moscow time, no matter where in Russia it is located.
#
# For Grozny, Chechnya, we have the following story from
# John Daniszewski, "Scavengers in the Rubble", Los Angeles Times (2001-02-07):
# News - often false - is spread by word of mouth.  A rumor that it was
# time to move the clocks back put this whole city out of sync with
# the rest of Russia for two weeks - even soldiers stationed here began
# enforcing curfew at the wrong time.
#
# From Gwillim Law (2001-06-05):
# There's considerable evidence that Sakhalin Island used to be in
# UTC+11, and has changed to UTC+10, in this decade.  I start with the
# SSIM, which listed Yuzhno-Sakhalinsk in zone RU10 along with Magadan
# until February 1997, and then in RU9 with Khabarovsk and Vladivostok
# since September 1997....  Although the Kuril Islands are
# administratively part of Sakhalin oblast', they appear to have
# remained on UTC+11 along with Magadan.

# From Marat Nigametzianov (2018-07-16):
# this is link to order from 1956 about timezone in USSR
# http://astro.uni-altai.ru/~orion/blog/2011/11/novyie-granitsyi-chasovyih-poyasov-v-sssr/
#
# From Paul Eggert (2018-07-16):
# Perhaps someone could translate the above-mentioned link and use it
# to correct our data for the ex-Soviet Union.  It cites the following:
# «Поясное время и новые границы часовых поясов» / сост. П.Н. Долгов,
# отв. ред. Г.Д. Бурдун - М: Комитет стандартов, мер и измерительных
# приборов при Совете Министров СССР, Междуведомственная комиссия
# единой службы времени, 1956 г.
# This book looks like it would be a helpful resource for the Soviet
# Union through 1956.  Although a copy was in the Scientific Library
# of Tomsk State University, I have not been able to track down a copy nearby.
#
# From Stepan Golosunov (2018-07-21):
# http://astro.uni-altai.ru/~orion/blog/2015/05/center-reforma-ischisleniya-vremeni-br-na-territorii-sssr-v-1957-godu-center/
# says that the 1956 decision to change time belts' borders was not
# implemented as planned in 1956 and the change happened in 1957.
# There is also the problem that actual time zones were different from
# the official time belts (and from many time belts' maps) as there were
# numerous exceptions to application of time belt rules.  For example,
# https://ru.wikipedia.org/wiki/Московское_время#Перемещение_границы_применения_московского_времени_на_восток
# says that by 1962 there were many regions in the 3rd time belt that
# were on Moscow time, referring to a 1962 map.  By 1989 number of such
# exceptions grew considerably.

# From Tim Parenti (2014-07-06):
# The comments detailing the coverage of each Russian zone are meant to assist
# with maintenance only and represent our best guesses as to which regions
# are covered by each zone.  They are not meant to be taken as an authoritative
# listing.  The region codes listed come from
# https://en.wikipedia.org/w/?title=Federal_subjects_of_Russia&oldid=611810498
# and are used for convenience only; no guarantees are made regarding their
# future stability.  ISO 3166-2:RU codes are also listed for first-level
# divisions where available.

# From Tim Parenti (2014-07-03):
# Europe/Kaliningrad covers...
# 39	RU-KGD	Kaliningrad Oblast

# From Paul Eggert (2019-07-25):
# Although Shanks lists 1945-01-01 as the date for transition from
# +01/+02 to +02/+03, more likely this is a placeholder.  Guess that
# the transition occurred at 1945-04-10 00:00, which is about when
# Königsberg surrendered to Soviet troops.  (Thanks to Alois Treindl.)

# From Paul Eggert (2016-03-18):
# The 1989 transition is from USSR act No. 227 (1989-03-14).

# From Stepan Golosunov (2016-03-07):
# http://www.rgo.ru/ru/kaliningradskoe-oblastnoe-otdelenie/ob-otdelenii/publikacii/kak-nam-zhilos-bez-letnego-vremeni
# confirms that the 1989 change to Moscow-1 was implemented.
# (The article, though, is misattributed to 1990 while saying that
# summer->winter transition would be done on the 24 of September. But
# 1990-09-24 was Monday, while 1989-09-24 was Sunday as expected.)
# ...
# http://www.kaliningradka.ru/site_pc/cherez/index.php?ELEMENT_ID=40091
# says that Kaliningrad switched to Moscow-1 on 1989-03-26, avoided
# at the last moment switch to Moscow-1 on 1991-03-31, switched to
# Moscow on 1991-11-03, switched to Moscow-1 on 1992-01-19.

Zone Europe/Kaliningrad	 1:22:00 -	LMT	1893 Apr
			 1:00	C-Eur	CE%sT	1945 Apr 10
			 2:00	Poland	EE%sT	1946 Apr  7
			 3:00	Russia	MSK/MSD	1989 Mar 26  2:00s
			 2:00	Russia	EE%sT	2011 Mar 27  2:00s
			 3:00	-	%z	2014 Oct 26  2:00s
			 2:00	-	EET


# From Paul Eggert (2016-02-21), per Tim Parenti (2014-07-03) and
# Oscar van Vlijmen (2001-08-25):
# Europe/Moscow covers...
# 01	RU-AD	Adygea, Republic of
# 05	RU-DA	Dagestan, Republic of
# 06	RU-IN	Ingushetia, Republic of
# 07	RU-KB	Kabardino-Balkar Republic
# 08	RU-KL	Kalmykia, Republic of
# 09	RU-KC	Karachay-Cherkess Republic
# 10	RU-KR	Karelia, Republic of
# 11	RU-KO	Komi Republic
# 12	RU-ME	Mari El Republic
# 13	RU-MO	Mordovia, Republic of
# 15	RU-SE	North Ossetia-Alania, Republic of
# 16	RU-TA	Tatarstan, Republic of
# 20	RU-CE	Chechen Republic
# 21	RU-CU	Chuvash Republic
# 23	RU-KDA	Krasnodar Krai
# 26	RU-STA	Stavropol Krai
# 29	RU-ARK	Arkhangelsk Oblast
# 31	RU-BEL	Belgorod Oblast
# 32	RU-BRY	Bryansk Oblast
# 33	RU-VLA	Vladimir Oblast
# 35	RU-VLG	Vologda Oblast
# 36	RU-VOR	Voronezh Oblast
# 37	RU-IVA	Ivanovo Oblast
# 40	RU-KLU	Kaluga Oblast
# 44	RU-KOS	Kostroma Oblast
# 46	RU-KRS	Kursk Oblast
# 47	RU-LEN	Leningrad Oblast
# 48	RU-LIP	Lipetsk Oblast
# 50	RU-MOS	Moscow Oblast
# 51	RU-MUR	Murmansk Oblast
# 52	RU-NIZ	Nizhny Novgorod Oblast
# 53	RU-NGR	Novgorod Oblast
# 57	RU-ORL	Oryol Oblast
# 58	RU-PNZ	Penza Oblast
# 60	RU-PSK	Pskov Oblast
# 61	RU-ROS	Rostov Oblast
# 62	RU-RYA	Ryazan Oblast
# 67	RU-SMO	Smolensk Oblast
# 68	RU-TAM	Tambov Oblast
# 69	RU-TVE	Tver Oblast
# 71	RU-TUL	Tula Oblast
# 76	RU-YAR	Yaroslavl Oblast
# 77	RU-MOW	Moscow
# 78	RU-SPE	Saint Petersburg
# 83	RU-NEN	Nenets Autonomous Okrug

# From Paul Eggert (2016-08-23):
# The Soviets switched to UT-based time in 1919.  Decree No. 59
# (1919-02-08) http://istmat.info/node/35567 established UT-based time
# zones, and Decree No. 147 (1919-03-29) http://istmat.info/node/35854
# specified a transition date of 1919-07-01, apparently at 00:00 UT.
# No doubt only the Soviet-controlled regions switched on that date;
# later transitions to UT-based time in other parts of Russia are
# taken from what appear to be guesses by Shanks.
# (Thanks to Alexander Belopolsky for pointers to the decrees.)

# From Stepan Golosunov (2016-03-07):
# 11. Regions-violators, 1981-1982.
# Wikipedia refers to
# http://maps.monetonos.ru/maps/raznoe/Old_Maps/Old_Maps/Articles/022/3_1981.html
# http://besp.narod.ru/nauka_1981_3.htm
#
# The second link provides two articles scanned from the Nauka i Zhizn
# magazine No. 3, 1981 and a scan of the short article attributed to
# the Trud newspaper from February 1982.  The first link provides the
# same Nauka i Zhizn articles converted to the text form (but misses
# time belt changes map).
#
# The second Nauka i Zhizn article says that in addition to
# introduction of summer time on 1981-04-01 there are some time belt
# border changes on 1981-10-01, mostly affecting Nenets Autonomous
# Okrug, Krasnoyarsk Krai, Yakutia, Magadan Oblast and Chukotka
# according to the provided map (colored one).  In addition to that
# "time violators" (regions which were not using rules of the time
# belts in which they were located) would not be moving off the DST on
# 1981-10-01 to restore the decree time usage.  (Komi ASSR was
# supposed to repeat that move in October 1982 to account for the 2
# hour difference.)  Map depicting "time violators" before 1981-10-01
# is also provided.
#
# The article from Trud says that 1981-10-01 changes caused problems
# and some territories would be moved to pre-1981-10-01 time by not
# moving to summer time on 1982-04-01.  Namely: Dagestan,
# Kabardino-Balkar, Kalmyk, Komi, Mari, Mordovian, North Ossetian,
# Tatar, Chechen-Ingush and Chuvash ASSR, Krasnodar and Stavropol
# krais, Arkhangelsk, Vladimir, Vologda, Voronezh, Gorky, Ivanovo,
# Kostroma, Lipetsk, Penza, Rostov, Ryazan, Tambov, Tyumen and
# Yaroslavl oblasts, Nenets and Evenk autonomous okrugs, Khatangsky
# district of Taymyr Autonomous Okrug.  As a result Evenk Autonomous
# Okrug and Khatangsky district of Taymyr Autonomous Okrug would end
# up on Moscow+4, Tyumen Oblast on Moscow+2 and the rest on Moscow
# time.
#
# http://astrozet.net/files/Zones/DOC/RU/1980-925.txt
# attributes the 1982 changes to the Act of the Council of Ministers
# of the USSR No. 126 from 18.02.1982.  1980-925.txt also adds
# Udmurtia to the list of affected territories and lists Khatangsky
# district separately from Taymyr Autonomous Okrug.  Probably erroneously.
#
# The affected territories are currently listed under Europe/Moscow,
# Asia/Yekaterinburg and Asia/Krasnoyarsk.
#
# 12. Udmurtia
# The fact that Udmurtia is depicted as a violator in the Nauka i
# Zhizn article hints at Izhevsk being on different time from
# Kuybyshev before 1981-10-01. Udmurtia is not mentioned in the 1989 act.
# http://astrozet.net/files/Zones/DOC/RU/1980-925.txt
# implies Udmurtia was on Moscow time after 1982-04-01.
# Wikipedia implies Udmurtia being on Moscow+1 until 1991.
#
# ...
#
# All Russian zones are supposed to have by default a -1 change at
# 1991-03-31 2:00 (cancellation of the decree time in the USSR) and a +1
# change at 1992-01-19 2:00 (restoration of the decree time in Russia).
#
# There were some exceptions, though.
# Wikipedia says newspapers listed Astrakhan, Saratov, Kirov, Volgograd,
# Izhevsk, Grozny, Kazan and Samara as such exceptions for the 1992
# change. (Different newspapers providing different lists. And some
# lists found in the internet are quite wild.)
#
# And apparently some exceptions were reverted in the last moment.
# http://www.kaliningradka.ru/site_pc/cherez/index.php?ELEMENT_ID=40091
# says that Kaliningrad decided not to be an exception 2 days before the
# 1991-03-31 switch and one person at
# https://izhevsk.ru/forum_light_message/50/682597-m8369040.html
# says he remembers that Samara opted out of the 1992-01-19 exception
# 2 days before the switch.
#
# From Alois Treindl (2022-02-15):
# the Russian wikipedia page
# https://ru.wikipedia.org/wiki/Московское_время#Перемещение_границы_применения_московского_времени_на_восток
# contains the sentence (in Google translation) "In the autumn of
# 1981, Arkhangelsk, Vologda, Yaroslavl, Ivanovo, Vladimir, Ryazan,
# Lipetsk, Voronezh, Rostov-on-Don, Krasnodar and regions to the east
# of those named (about 30 in total) parted ways with Moscow time.
# However, the convenience of common time with Moscow turned out to be
# decisive - in 1982, these regions again switched to Moscow time."
# Shanks International atlas has similar information, and also the
# Russian book Zaitsev A., Kutalev D. A new astrologer's reference
# book. Coordinates of cities and time corrections, - The World of
# Urania, 2012 (Russian: Зайцев А., Куталёв Д., Новый справочник
# астролога. Координаты городов и временные поправки).
# To me it seems that an extra zone is needed, which starts with LMT
# util 1919, later follows Moscow since 1930, but deviates from it
# between 1 October 1981 until 1 April 1982.
#
#
# From Paul Eggert (2022-02-15):
# Given the above, we appear to be missing some Zone entries for the
# chaotic early 1980s in Russia.  It's not clear what these entries
# should be.  For now, sweep this under the rug and just document the
# time in Moscow.

# From Vladimir Karpinsky (2014-07-08):
# LMT in Moscow (before Jul 3, 1916) is 2:30:17, that was defined by Moscow
# Observatory (coordinates: 55° 45' 29.70", 37° 34' 05.30")....
# LMT in Moscow since Jul 3, 1916 is 2:31:01 as a result of new standard.
# (The info is from the book by Byalokoz ... p. 18.)
# The time in St. Petersburg as capital of Russia was defined by
# Pulkov observatory, near St. Petersburg.  In 1916 LMT Moscow
# was synchronized with LMT St. Petersburg (+30 minutes), (Pulkov observatory
# coordinates: 59° 46' 18.70", 30° 19' 40.70") so 30° 19' 40.70" >
# 2h01m18.7s = 2:01:19.  LMT Moscow = LMT St.Petersburg + 30m 2:01:19 + 0:30 =
# 2:31:19 ...
#
# From Paul Eggert (2014-07-08):
# Milne does not list Moscow, but suggests that its time might be listed in
# Résumés mensuels et annuels des observations météorologiques (1895).
# Presumably this is OCLC 85825704, a journal published with parallel text in
# Russian and French.  This source has not been located; go with Karpinsky.

Zone Europe/Moscow	 2:30:17 -	LMT	1880
			 2:30:17 -	MMT	1916 Jul  3 # Moscow Mean Time
			 2:31:19 Russia	%s	1919 Jul  1  0:00u
			 3:00	Russia	%s	1921 Oct
			 3:00	Russia	MSK/MSD	1922 Oct
			 2:00	-	EET	1930 Jun 21
			 3:00	Russia	MSK/MSD	1991 Mar 31  2:00s
			 2:00	Russia	EE%sT	1992 Jan 19  2:00s
			 3:00	Russia	MSK/MSD	2011 Mar 27  2:00s
			 4:00	-	MSK	2014 Oct 26  2:00s
			 3:00	-	MSK


# From Paul Eggert (2016-12-06):
# Europe/Simferopol covers Crimea.

Zone Europe/Simferopol	 2:16:24 -	LMT	1880
			 2:16	-	SMT	1924 May  2 # Simferopol Mean T
			 2:00	-	EET	1930 Jun 21
			 3:00	-	MSK	1941 Nov
			 1:00	C-Eur	CE%sT	1944 Apr 13
			 3:00	Russia	MSK/MSD	1990
			 3:00	-	MSK	1990 Jul  1  2:00
			 2:00	-	EET	1992 Mar 20
# Central Crimea used Moscow time 1994/1997.
#
# From Paul Eggert (2022-07-21):
# The _Economist_ (1994-05-28, p 45) reported that central Crimea switched
# from Kyiv to Moscow time sometime after the January 1994 elections.
# Shanks (1999) says "date of change uncertain", but implies that it happened
# sometime between the 1994 DST switches.  Shanks & Pottenger simply say
# 1994-09-25 03:00, but that can't be right.  For now, guess it
# changed in May.  This change evidently didn't last long; see below.
			 2:00	C-Eur	EE%sT	1994 May
# From IATA SSIM (1994/1997), which also said that Kerch is still like Kyiv.
			 3:00	C-Eur	MSK/MSD	1996 Mar 31  0:00s
			 3:00	1:00	MSD	1996 Oct 27  3:00s
# IATA SSIM (1997-09) said Crimea switched to EET/EEST.
# Assume it happened in March by not changing the clocks.
			 3:00	-	MSK	1997 Mar lastSun  1:00u
# From Alexander Krivenyshev (2014-03-17):
# time change at 2:00 (2am) on March 30, 2014
# https://vz.ru/news/2014/3/17/677464.html
# From Tim Parenti (2022-07-01), per Paul Eggert (2014-03-30):
# The clocks at the railway station in Simferopol were put forward from 22:00
# to 24:00 the previous day in a "symbolic ceremony"; however, per
# contemporaneous news reports, "ordinary Crimeans [made] the daylight savings
# time switch at 2am" on Sunday.
# https://www.business-standard.com/article/pti-stories/crimea-to-set-clocks-to-russia-time-114033000014_1.html
# https://www.reuters.com/article/us-ukraine-crisis-crimea-time/crimea-switches-to-moscow-time-amid-incorporation-frenzy-idUKBREA2S0LT20140329
# https://www.bbc.com/news/av/world-europe-26806583
			 2:00	EU	EE%sT	2014 Mar 30  2:00
			 4:00	-	MSK	2014 Oct 26  2:00s
			 3:00	-	MSK


# From Paul Eggert (2016-03-18):
# Europe/Astrakhan covers:
# 30	RU-AST	Astrakhan Oblast
#
# The 1989 transition is from USSR act No. 227 (1989-03-14).

# From Alexander Krivenyshev (2016-01-12):
# On February 10, 2016 Astrakhan Oblast got approval by the Federation
# Council to change its time zone to UTC+4 (from current UTC+3 Moscow time)....
# This Federal Law shall enter into force on 27 March 2016 at 02:00.
# From Matt Johnson (2016-03-09):
# http://publication.pravo.gov.ru/Document/View/0001201602150056

Zone Europe/Astrakhan	 3:12:12 -	LMT	1924 May
			 3:00	-	%z	1930 Jun 21
			 4:00	Russia	%z	1989 Mar 26  2:00s
			 3:00	Russia	%z	1991 Mar 31  2:00s
			 4:00	-	%z	1992 Mar 29  2:00s
			 3:00	Russia	%z	2011 Mar 27  2:00s
			 4:00	-	%z	2014 Oct 26  2:00s
			 3:00	-	%z	2016 Mar 27  2:00s
			 4:00	-	%z

# From Paul Eggert (2016-11-11):
# Europe/Volgograd covers:
# 34	RU-VGG	Volgograd Oblast
# The 1988 transition is from USSR act No. 5 (1988-01-04).

# From Alexander Fetisov (2018-09-20):
# Volgograd region in southern Russia (Europe/Volgograd) change
# timezone from UTC+3 to UTC+4 from 28oct2018.
# http://sozd.parliament.gov.ru/bill/452878-7
#
# From Stepan Golosunov (2018-10-11):
# The law has been published today on
# http://publication.pravo.gov.ru/Document/View/0001201810110037

# From Alexander Krivenyshev (2020-11-27):
# The State Duma approved (Nov 24, 2020) the transition of the Volgograd
# region to the Moscow time zone....
# https://sozd.duma.gov.ru/bill/1012130-7
#
# From Stepan Golosunov (2020-12-05):
# Currently proposed text for the second reading (expected on December 8) ...
# changes the date to December 27. https://v1.ru/text/gorod/2020/12/04/69601031/
#
# From Stepan Golosunov (2020-12-22):
# The law was published today on
# http://publication.pravo.gov.ru/Document/View/0001202012220002

Zone Europe/Volgograd	 2:57:40 -	LMT	1920 Jan  3
			 3:00	-	%z	1930 Jun 21
			 4:00	-	%z	1961 Nov 11
			 4:00	Russia	%z	1988 Mar 27  2:00s
			 3:00	Russia	MSK/MSD	1991 Mar 31  2:00s
			 4:00	-	%z	1992 Mar 29  2:00s
			 3:00	Russia	MSK/MSD	2011 Mar 27  2:00s
			 4:00	-	MSK	2014 Oct 26  2:00s
			 3:00	-	MSK	2018 Oct 28  2:00s
			 4:00	-	%z	2020 Dec 27  2:00s
			 3:00	-	MSK

# From Paul Eggert (2016-11-11):
# Europe/Saratov covers:
# 64	RU-SAR	Saratov Oblast

# From Yuri Konotopov (2016-11-11):
# Dec 4, 2016 02:00 UTC+3....  Saratov Region's local time will be ... UTC+4.
# From Stepan Golosunov (2016-11-11):
# ... Byalokoz listed Saratov on 03:04:18.
# From Stepan Golosunov (2016-11-22):
# http://publication.pravo.gov.ru/Document/View/0001201611220031

Zone Europe/Saratov	 3:04:18 -	LMT	1919 Jul  1  0:00u
			 3:00	-	%z	1930 Jun 21
			 4:00	Russia	%z	1988 Mar 27  2:00s
			 3:00	Russia	%z	1991 Mar 31  2:00s
			 4:00	-	%z	1992 Mar 29  2:00s
			 3:00	Russia	%z	2011 Mar 27  2:00s
			 4:00	-	%z	2014 Oct 26  2:00s
			 3:00	-	%z	2016 Dec  4  2:00s
			 4:00	-	%z

# From Paul Eggert (2016-03-18):
# Europe/Kirov covers:
# 43	RU-KIR	Kirov Oblast
# The 1989 transition is from USSR act No. 227 (1989-03-14).
#
Zone Europe/Kirov	 3:18:48 -	LMT	1919 Jul  1  0:00u
			 3:00	-	%z	1930 Jun 21
			 4:00	Russia	%z	1989 Mar 26  2:00s
			 3:00	Russia	MSK/MSD	1991 Mar 31  2:00s
			 4:00	-	%z	1992 Mar 29  2:00s
			 3:00	Russia	MSK/MSD	2011 Mar 27  2:00s
			 4:00	-	MSK	2014 Oct 26  2:00s
			 3:00	-	MSK

# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25):
# Europe/Samara covers...
# 18	RU-UD	Udmurt Republic
# 63	RU-SAM	Samara Oblast

# From Paul Eggert (2016-03-18):
# Byalokoz 1919 says Samara was 3:20:20.
# The 1989 transition is from USSR act No. 227 (1989-03-14).

Zone Europe/Samara	 3:20:20 -	LMT	1919 Jul  1  0:00u
			 3:00	-	%z	1930 Jun 21
			 4:00	-	%z	1935 Jan 27
			 4:00	Russia	%z	1989 Mar 26  2:00s
			 3:00	Russia	%z	1991 Mar 31  2:00s
			 2:00	Russia	%z	1991 Sep 29  2:00s
			 3:00	-	%z	1991 Oct 20  3:00
			 4:00	Russia	%z	2010 Mar 28  2:00s
			 3:00	Russia	%z	2011 Mar 27  2:00s
			 4:00	-	%z

# From Paul Eggert (2016-03-18):
# Europe/Ulyanovsk covers:
# 73	RU-ULY	Ulyanovsk Oblast

# The 1989 transition is from USSR act No. 227 (1989-03-14).

# From Alexander Krivenyshev (2016-02-17):
# Ulyanovsk ... on their way to change time zones by March 27, 2016 at 2am.
# Ulyanovsk Oblast ... from MSK to MSK+1 (UTC+3 to UTC+4) ...
# 920582-6 ... 02/17/2016 The State Duma passed the bill in the first reading.
# From Matt Johnson (2016-03-09):
# http://publication.pravo.gov.ru/Document/View/0001201603090051

Zone Europe/Ulyanovsk	 3:13:36 -	LMT	1919 Jul  1  0:00u
			 3:00	-	%z	1930 Jun 21
			 4:00	Russia	%z	1989 Mar 26  2:00s
			 3:00	Russia	%z	1991 Mar 31  2:00s
			 2:00	Russia	%z	1992 Jan 19  2:00s
			 3:00	Russia	%z	2011 Mar 27  2:00s
			 4:00	-	%z	2014 Oct 26  2:00s
			 3:00	-	%z	2016 Mar 27  2:00s
			 4:00	-	%z

# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25):
# Asia/Yekaterinburg covers...
# 02	RU-BA	Bashkortostan, Republic of
# 90	RU-PER	Perm Krai
# 45	RU-KGN	Kurgan Oblast
# 56	RU-ORE	Orenburg Oblast
# 66	RU-SVE	Sverdlovsk Oblast
# 72	RU-TYU	Tyumen Oblast
# 74	RU-CHE	Chelyabinsk Oblast
# 86	RU-KHM	Khanty-Mansi Autonomous Okrug - Yugra
# 89	RU-YAN	Yamalo-Nenets Autonomous Okrug
#
# Note: Effective 2005-12-01, (59) Perm Oblast and (81) Komi-Permyak
# Autonomous Okrug merged to form (90, RU-PER) Perm Krai.

# Milne says Yekaterinburg was 4:02:32.9.
# Byalokoz 1919 says its provincial time was based on Perm, at 3:45:05.
# Assume it switched on 1916-07-03, the time of the new standard.
# The 1919 and 1930 transitions are from Shanks.

		#STDOFF	 4:02:32.9
Zone Asia/Yekaterinburg	 4:02:33 -	LMT	1916 Jul  3
			 3:45:05 -	PMT	1919 Jul 15  4:00
			 4:00	-	%z	1930 Jun 21
			 5:00	Russia	%z	1991 Mar 31  2:00s
			 4:00	Russia	%z	1992 Jan 19  2:00s
			 5:00	Russia	%z	2011 Mar 27  2:00s
			 6:00	-	%z	2014 Oct 26  2:00s
			 5:00	-	%z


# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25):
# Asia/Omsk covers...
# 55	RU-OMS	Omsk Oblast

# Byalokoz 1919 says Omsk was 4:53:30.

Zone Asia/Omsk		 4:53:30 -	LMT	1919 Nov 14
			 5:00	-	%z	1930 Jun 21
			 6:00	Russia	%z	1991 Mar 31  2:00s
			 5:00	Russia	%z	1992 Jan 19  2:00s
			 6:00	Russia	%z	2011 Mar 27  2:00s
			 7:00	-	%z	2014 Oct 26  2:00s
			 6:00	-	%z

# From Paul Eggert (2016-02-22):
# Asia/Barnaul covers:
# 04	RU-AL	Altai Republic
# 22	RU-ALT	Altai Krai

# Data before 1991 are from Shanks & Pottenger.

# From Stepan Golosunov (2016-03-07):
# Letter of Bank of Russia from 1995-05-25
# http://www.bestpravo.ru/rossijskoje/lj-akty/y3a.htm
# suggests that Altai Republic transitioned to Moscow+3 on
# 1995-05-28.
#
# https://regnum.ru/news/society/1957270.html
# has some historical data for Altai Krai:
# before 1957: west part on UT+6, east on UT+7
# after 1957: UT+7
# since 1995: UT+6
# http://barnaul.rusplt.ru/index/pochemu_altajskij_kraj_okazalsja_v_neprivychnom_chasovom_pojase-17648.html
# confirms that and provides more details including 1995-05-28 transition date.

# From Alexander Krivenyshev (2016-02-17):
# Altai Krai and Altai Republic on their way to change time zones
# by March 27, 2016 at 2am....
# Altai Republic / Gorno-Altaysk MSK+3 to MSK+4 (UTC+6 to UTC+7) ...
# Altai Krai / Barnaul MSK+3 to MSK+4 (UTC+6 to UTC+7)
# From Matt Johnson (2016-03-09):
# http://publication.pravo.gov.ru/Document/View/0001201603090043
# http://publication.pravo.gov.ru/Document/View/0001201603090038

Zone Asia/Barnaul	 5:35:00 -	LMT	1919 Dec 10
			 6:00	-	%z	1930 Jun 21
			 7:00	Russia	%z	1991 Mar 31  2:00s
			 6:00	Russia	%z	1992 Jan 19  2:00s
			 7:00	Russia	%z	1995 May 28
			 6:00	Russia	%z	2011 Mar 27  2:00s
			 7:00	-	%z	2014 Oct 26  2:00s
			 6:00	-	%z	2016 Mar 27  2:00s
			 7:00	-	%z

# From Paul Eggert (2016-03-18):
# Asia/Novosibirsk covers:
# 54	RU-NVS	Novosibirsk Oblast

# From Stepan Golosunov (2016-05-30):
# http://asozd2.duma.gov.ru/main.nsf/(Spravka)?OpenAgent&RN=1085784-6
# moves Novosibirsk oblast from UTC+6 to UTC+7.
# From Stepan Golosunov (2016-07-04):
# The law was signed yesterday and published today on
# http://publication.pravo.gov.ru/Document/View/0001201607040064

Zone Asia/Novosibirsk	 5:31:40 -	LMT	1919 Dec 14  6:00
			 6:00	-	%z	1930 Jun 21
			 7:00	Russia	%z	1991 Mar 31  2:00s
			 6:00	Russia	%z	1992 Jan 19  2:00s
			 7:00	Russia	%z	1993 May 23 # say Shanks & P.
			 6:00	Russia	%z	2011 Mar 27  2:00s
			 7:00	-	%z	2014 Oct 26  2:00s
			 6:00	-	%z	2016 Jul 24  2:00s
			 7:00	-	%z

# From Paul Eggert (2016-03-18):
# Asia/Tomsk covers:
# 70	RU-TOM	Tomsk Oblast

# From Stepan Golosunov (2016-03-24):
# Byalokoz listed Tomsk at 5:39:51.

# From Stanislaw A. Kuzikowski (1994-06-29):
# Tomsk is still 4 hours ahead of Moscow.

# From Stepan Golosunov (2016-03-19):
# http://pravo.gov.ru/proxy/ips/?docbody=&nd=102075743
# (fifth time belt being UTC+5+1(decree time)
# / UTC+5+1(decree time)+1(summer time)) ...
# Note that time belts (numbered from 2 (Moscow) to 12 according to their
# GMT/UTC offset and having too many exceptions like regions formally
# belonging to one belt but using time from another) were replaced
# with time zones in 2011 with different numbering (there was a
# 2-hour gap between second and third zones in 2011-2014).

# From Stepan Golosunov (2016-04-12):
# http://asozd2.duma.gov.ru/main.nsf/(SpravkaNew)?OpenAgent&RN=1006865-6
# This bill was approved in the first reading today.  It moves Tomsk oblast
# from UTC+6 to UTC+7 and is supposed to come into effect on 2016-05-29 at
# 2:00.  The bill needs to be approved in the second and the third readings by
# the State Duma, approved by the Federation Council, signed by the President
# and published to become a law.  Minor changes in the text are to be expected
# before the second reading (references need to be updated to account for the
# recent changes).
#
# Judging by the ultra-short one-day amendments period, recent similar laws,
# the State Duma schedule and the Federation Council schedule
# http://www.duma.gov.ru/legislative/planning/day-shedule/por_vesna_2016/
# http://council.gov.ru/activity/meetings/schedule/63303
# I speculate that the final text of the bill will be proposed tomorrow, the
# bill will be approved in the second and the third readings on Friday,
# approved by the Federation Council on 2016-04-20, signed by the President and
# published as a law around 2016-04-26.

# From Matt Johnson (2016-04-26):
# http://publication.pravo.gov.ru/Document/View/0001201604260048

Zone	Asia/Tomsk	 5:39:51 -	LMT	1919 Dec 22
			 6:00	-	%z	1930 Jun 21
			 7:00	Russia	%z	1991 Mar 31  2:00s
			 6:00	Russia	%z	1992 Jan 19  2:00s
			 7:00	Russia	%z	2002 May  1  3:00
			 6:00	Russia	%z	2011 Mar 27  2:00s
			 7:00	-	%z	2014 Oct 26  2:00s
			 6:00	-	%z	2016 May 29  2:00s
			 7:00	-	%z


# From Tim Parenti (2014-07-03):
# Asia/Novokuznetsk covers...
# 42	RU-KEM	Kemerovo Oblast

# From Alexander Krivenyshev (2009-10-13):
# Kemerovo oblast' (Kemerovo region) in Russia will change current time zone on
# March 28, 2010:
# from current Russia Zone 6 - Krasnoyarsk Time Zone (KRA) UTC +0700
# to Russia Zone 5 - Novosibirsk Time Zone (NOV) UTC +0600
#
# This is according to Government of Russia decree No. 740, on September
# 14, 2009 "Application in the territory of the Kemerovo region the Fifth
# time zone." ("Russia Zone 5" or old "USSR Zone 5" is GMT +0600)
#
# Russian Government web site (Russian language)
# http://www.government.ru/content/governmentactivity/rfgovernmentdecisions/archive/2009/09/14/991633.htm
# or Russian-English translation by WorldTimeZone.com with reference
# map to local region and new Russia Time Zone map after March 28, 2010
# http://www.worldtimezone.com/dst_news/dst_news_russia03.html
#
# Thus, when Russia will switch to DST on the night of March 28, 2010
# Kemerovo region (Kemerovo oblast') will not change the clock.

# From Tim Parenti (2014-07-02), per Alexander Krivenyshev (2014-07-02):
# The Kemerovo region will remain at UTC+7 through the 2014-10-26 change, thus
# realigning itself with KRAT.

Zone Asia/Novokuznetsk	 5:48:48 -	LMT	1924 May  1
			 6:00	-	%z	1930 Jun 21
			 7:00	Russia	%z	1991 Mar 31  2:00s
			 6:00	Russia	%z	1992 Jan 19  2:00s
			 7:00	Russia	%z	2010 Mar 28  2:00s
			 6:00	Russia	%z	2011 Mar 27  2:00s
			 7:00	-	%z

# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25):
# Asia/Krasnoyarsk covers...
# 17	RU-TY	Tuva Republic
# 19	RU-KK	Khakassia, Republic of
# 24	RU-KYA	Krasnoyarsk Krai
#
# Note: Effective 2007-01-01, (88) Evenk Autonomous Okrug and (84) Taymyr
# Autonomous Okrug were merged into (24, RU-KYA) Krasnoyarsk Krai.

# Byalokoz 1919 says Krasnoyarsk was 6:11:26.

Zone Asia/Krasnoyarsk	 6:11:26 -	LMT	1920 Jan  6
			 6:00	-	%z	1930 Jun 21
			 7:00	Russia	%z	1991 Mar 31  2:00s
			 6:00	Russia	%z	1992 Jan 19  2:00s
			 7:00	Russia	%z	2011 Mar 27  2:00s
			 8:00	-	%z	2014 Oct 26  2:00s
			 7:00	-	%z


# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25):
# Asia/Irkutsk covers...
# 03	RU-BU	Buryatia, Republic of
# 38	RU-IRK	Irkutsk Oblast
#
# Note: Effective 2008-01-01, (85) Ust-Orda Buryat Autonomous Okrug was
# merged into (38, RU-IRK) Irkutsk Oblast.

# Milne 1899 says Irkutsk was 6:57:15.
# Byalokoz 1919 says Irkutsk was 6:57:05.
# Go with Byalokoz.

Zone Asia/Irkutsk	 6:57:05 -	LMT	1880
			 6:57:05 -	IMT	1920 Jan 25 # Irkutsk Mean Time
			 7:00	-	%z	1930 Jun 21
			 8:00	Russia	%z	1991 Mar 31  2:00s
			 7:00	Russia	%z	1992 Jan 19  2:00s
			 8:00	Russia	%z	2011 Mar 27  2:00s
			 9:00	-	%z	2014 Oct 26  2:00s
			 8:00	-	%z


# From Tim Parenti (2014-07-06):
# Asia/Chita covers...
# 92	RU-ZAB	Zabaykalsky Krai
#
# Note: Effective 2008-03-01, (75) Chita Oblast and (80) Agin-Buryat
# Autonomous Okrug merged to form (92, RU-ZAB) Zabaykalsky Krai.

# From Alexander Krivenyshev (2016-01-02):
# [The] time zone in the Trans-Baikal Territory (Zabaykalsky Krai) -
# Asia/Chita [is changing] from UTC+8 to UTC+9.  Effective date will
# be March 27, 2016 at 2:00am....
# http://publication.pravo.gov.ru/Document/View/0001201512300107

Zone Asia/Chita	 7:33:52 -	LMT	1919 Dec 15
			 8:00	-	%z	1930 Jun 21
			 9:00	Russia	%z	1991 Mar 31  2:00s
			 8:00	Russia	%z	1992 Jan 19  2:00s
			 9:00	Russia	%z	2011 Mar 27  2:00s
			10:00	-	%z	2014 Oct 26  2:00s
			 8:00	-	%z	2016 Mar 27  2:00
			 9:00	-	%z


# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2009-11-29):
# Asia/Yakutsk covers...
# 28	RU-AMU	Amur Oblast
#
# ...and parts of (14, RU-SA) Sakha (Yakutia) Republic:
# 14-02	****	Aldansky District
# 14-04	****	Amginsky District
# 14-05	****	Anabarsky District
# 14-06	****	Bulunsky District
# 14-07	****	Verkhnevilyuysky District
# 14-10	****	Vilyuysky District
# 14-11	****	Gorny District
# 14-12	****	Zhigansky District
# 14-13	****	Kobyaysky District
# 14-14	****	Lensky District
# 14-15	****	Megino-Kangalassky District
# 14-16	****	Mirninsky District
# 14-18	****	Namsky District
# 14-19	****	Neryungrinsky District
# 14-21	****	Nyurbinsky District
# 14-23	****	Olenyoksky District
# 14-24	****	Olyokminsky District
# 14-26	****	Suntarsky District
# 14-27	****	Tattinsky District
# 14-29	****	Ust-Aldansky District
# 14-32	****	Khangalassky District
# 14-33	****	Churapchinsky District
# 14-34	****	Eveno-Bytantaysky National District

# From Tim Parenti (2014-07-03):
# Our commentary seems to have lost mention of (14-19) Neryungrinsky District.
# Since the surrounding districts of Sakha are all YAKT, assume this is, too.
# Also assume its history has been the same as the rest of Asia/Yakutsk.

# Byalokoz 1919 says Yakutsk was 8:38:58.

Zone Asia/Yakutsk	 8:38:58 -	LMT	1919 Dec 15
			 8:00	-	%z	1930 Jun 21
			 9:00	Russia	%z	1991 Mar 31  2:00s
			 8:00	Russia	%z	1992 Jan 19  2:00s
			 9:00	Russia	%z	2011 Mar 27  2:00s
			10:00	-	%z	2014 Oct 26  2:00s
			 9:00	-	%z


# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2009-11-29):
# Asia/Vladivostok covers...
# 25	RU-PRI	Primorsky Krai
# 27	RU-KHA	Khabarovsk Krai
# 79	RU-YEV	Jewish Autonomous Oblast
#
# ...and parts of (14, RU-SA) Sakha (Yakutia) Republic:
# 14-09	****	Verkhoyansky District
# 14-31	****	Ust-Yansky District

# Milne 1899 says Vladivostok was 8:47:33.5.
# Byalokoz 1919 says Vladivostok was 8:47:31.
# Go with Byalokoz.

Zone Asia/Vladivostok	 8:47:31 -	LMT	1922 Nov 15
			 9:00	-	%z	1930 Jun 21
			10:00	Russia	%z	1991 Mar 31  2:00s
			 9:00	Russia	%z	1992 Jan 19  2:00s
			10:00	Russia	%z	2011 Mar 27  2:00s
			11:00	-	%z	2014 Oct 26  2:00s
			10:00	-	%z


# From Tim Parenti (2014-07-03):
# Asia/Khandyga covers parts of (14, RU-SA) Sakha (Yakutia) Republic:
# 14-28	****	Tomponsky District
# 14-30	****	Ust-Maysky District

# From Arthur David Olson (2022-03-21):
# Tomponsky and Ust-Maysky switched from Vladivostok time to Yakutsk time
# in 2011.

# From Paul Eggert (2012-11-25):
# Shanks and Pottenger (2003) has Khandyga on Yakutsk time.
# Make a wild guess that it switched to Vladivostok time in 2004.
# This transition is no doubt wrong, but we have no better info.

Zone Asia/Khandyga	 9:02:13 -	LMT	1919 Dec 15
			 8:00	-	%z	1930 Jun 21
			 9:00	Russia	%z	1991 Mar 31  2:00s
			 8:00	Russia	%z	1992 Jan 19  2:00s
			 9:00	Russia	%z	2004
			10:00	Russia	%z	2011 Mar 27  2:00s
			11:00	-	%z	2011 Sep 13  0:00s # Decree 725?
			10:00	-	%z	2014 Oct 26  2:00s
			 9:00	-	%z


# From Tim Parenti (2014-07-03):
# Asia/Sakhalin covers...
# 65	RU-SAK	Sakhalin Oblast
# ...with the exception of:
# 65-11	****	Severo-Kurilsky District (North Kuril Islands)

# From Matt Johnson (2016-02-22):
# Asia/Sakhalin is moving (in entirety) from UTC+10 to UTC+11 ...
# (2016-03-09):
# http://publication.pravo.gov.ru/Document/View/0001201603090044

# The Zone name should be Asia/Yuzhno-Sakhalinsk, but that's too long.
Zone Asia/Sakhalin	 9:30:48 -	LMT	1905 Aug 23
			 9:00	-	%z	1945 Aug 25
			11:00	Russia	%z	1991 Mar 31  2:00s # Sakhalin T
			10:00	Russia	%z	1992 Jan 19  2:00s
			11:00	Russia	%z	1997 Mar lastSun  2:00s
			10:00	Russia	%z	2011 Mar 27  2:00s
			11:00	-	%z	2014 Oct 26  2:00s
			10:00	-	%z	2016 Mar 27  2:00s
			11:00	-	%z


# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2009-11-29):
# Asia/Magadan covers...
# 49	RU-MAG	Magadan Oblast

# From Tim Parenti (2014-07-06), per Alexander Krivenyshev (2014-07-02):
# Magadan Oblast is moving from UTC+12 to UTC+10 on 2014-10-26; however,
# several districts of Sakha Republic as well as Severo-Kurilsky District of
# the Sakhalin Oblast (also known as the North Kuril Islands), represented
# until now by Asia/Magadan, will instead move to UTC+11.  These regions will
# need their own zone.

# From Alexander Krivenyshev (2016-03-27):
# ... draft bill 948300-6 to change its time zone from UTC+10 to UTC+11 ...
# will take ... effect ... on April 24, 2016 at 2 o'clock
#
# From Matt Johnson (2016-04-05):
# ... signed by the President today ...
# http://publication.pravo.gov.ru/Document/View/0001201604050038

Zone Asia/Magadan	10:03:12 -	LMT	1924 May  2
			10:00	-	%z	1930 Jun 21 # Magadan Time
			11:00	Russia	%z	1991 Mar 31  2:00s
			10:00	Russia	%z	1992 Jan 19  2:00s
			11:00	Russia	%z	2011 Mar 27  2:00s
			12:00	-	%z	2014 Oct 26  2:00s
			10:00	-	%z	2016 Apr 24  2:00s
			11:00	-	%z


# From Tim Parenti (2014-07-06):
# Asia/Srednekolymsk covers parts of (14, RU-SA) Sakha (Yakutia) Republic:
# 14-01	****	Abyysky District
# 14-03	****	Allaikhovsky District
# 14-08	****	Verkhnekolymsky District
# 14-17	****	Momsky District
# 14-20	****	Nizhnekolymsky District
# 14-25	****	Srednekolymsky District
#
# ...and parts of (65, RU-SAK) Sakhalin Oblast:
# 65-11	****	Severo-Kurilsky District (North Kuril Islands)

# From Tim Parenti (2014-07-02):
# Oymyakonsky District of Sakha Republic (represented by Ust-Nera), along with
# most of Sakhalin Oblast (represented by Sakhalin) will be moving to UTC+10 on
# 2014-10-26 to stay aligned with VLAT/SAKT; however, Severo-Kurilsky District
# of the Sakhalin Oblast (also known as the North Kuril Islands, represented by
# Severo-Kurilsk) will remain on UTC+11.

# From Tim Parenti (2014-07-06):
# Assume North Kuril Islands have history like Magadan before 2011-03-27.
# There is a decent chance this is wrong, in which case a new zone
# Asia/Severo-Kurilsk would become necessary.
#
# Srednekolymsk and Zyryanka are the most populous places amongst these
# districts, but have very similar populations.  In fact, Wikipedia currently
# lists them both as having 3528 people, exactly 1668 males and 1860 females
# each!  (Yikes!)
# https://en.wikipedia.org/w/?title=Srednekolymsky_District&oldid=603435276
# https://en.wikipedia.org/w/?title=Verkhnekolymsky_District&oldid=594378493
# Assume this is a mistake, albeit an amusing one.
#
# Looking at censuses, the populations of the two municipalities seem to have
# fluctuated recently.  Zyryanka was more populous than Srednekolymsk in the
# 1989 and 2002 censuses, but Srednekolymsk was more populous in the most
# recent (2010) census, 3525 to 3170.  (See pages 195 and 197 of
# http://www.gks.ru/free_doc/new_site/perepis2010/croc/Documents/Vol1/pub-01-05.pdf
# in Russian.)  In addition, Srednekolymsk appears to be a much older
# settlement and the population of Zyryanka seems to be declining.
# Go with Srednekolymsk.

Zone Asia/Srednekolymsk	10:14:52 -	LMT	1924 May  2
			10:00	-	%z	1930 Jun 21
			11:00	Russia	%z	1991 Mar 31  2:00s
			10:00	Russia	%z	1992 Jan 19  2:00s
			11:00	Russia	%z	2011 Mar 27  2:00s
			12:00	-	%z	2014 Oct 26  2:00s
			11:00	-	%z


# From Tim Parenti (2014-07-03):
# Asia/Ust-Nera covers parts of (14, RU-SA) Sakha (Yakutia) Republic:
# 14-22	****	Oymyakonsky District

# From Arthur David Olson (2022-03-21):
# Oymyakonsky and the Kuril Islands switched from
# Magadan time to Vladivostok time in 2011.
#
# From Tim Parenti (2014-07-06), per Alexander Krivenyshev (2014-07-02):
# It's unlikely that any of the Kuril Islands were involved in such a switch,
# as the South and Middle Kurils have been on UTC+11 (SAKT) with the rest of
# Sakhalin Oblast since at least 2011-09, and the North Kurils have been on
# UTC+12 since at least then, too.

Zone Asia/Ust-Nera	 9:32:54 -	LMT	1919 Dec 15
			 8:00	-	%z	1930 Jun 21
			 9:00	Russia	%z	1981 Apr  1
			11:00	Russia	%z	1991 Mar 31  2:00s
			10:00	Russia	%z	1992 Jan 19  2:00s
			11:00	Russia	%z	2011 Mar 27  2:00s
			12:00	-	%z	2011 Sep 13  0:00s # Decree 725?
			11:00	-	%z	2014 Oct 26  2:00s
			10:00	-	%z


# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25):
# Asia/Kamchatka covers...
# 91	RU-KAM	Kamchatka Krai
#
# Note: Effective 2007-07-01, (41) Kamchatka Oblast and (82) Koryak
# Autonomous Okrug merged to form (91, RU-KAM) Kamchatka Krai.

# The Zone name should be Asia/Petropavlovsk-Kamchatski or perhaps
# Asia/Petropavlovsk-Kamchatsky, but these are too long.
Zone Asia/Kamchatka	10:34:36 -	LMT	1922 Nov 10
			11:00	-	%z	1930 Jun 21
			12:00	Russia	%z	1991 Mar 31  2:00s
			11:00	Russia	%z	1992 Jan 19  2:00s
			12:00	Russia	%z	2010 Mar 28  2:00s
			11:00	Russia	%z	2011 Mar 27  2:00s
			12:00	-	%z


# From Tim Parenti (2014-07-03):
# Asia/Anadyr covers...
# 87	RU-CHU	Chukotka Autonomous Okrug

Zone Asia/Anadyr	11:49:56 -	LMT	1924 May  2
			12:00	-	%z	1930 Jun 21
			13:00	Russia	%z	1982 Apr  1  0:00s
			12:00	Russia	%z	1991 Mar 31  2:00s
			11:00	Russia	%z	1992 Jan 19  2:00s
			12:00	Russia	%z	2010 Mar 28  2:00s
			11:00	Russia	%z	2011 Mar 27  2:00s
			12:00	-	%z

# Bosnia & Herzegovina
# Croatia
# Kosovo
# Montenegro
# North Macedonia
# Serbia
# Slovenia
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Belgrade	1:22:00	-	LMT	1884
			1:00	-	CET	1941 Apr 18 23:00
			1:00	C-Eur	CE%sT	1945
			1:00	-	CET	1945 May  8  2:00s
			1:00	1:00	CEST	1945 Sep 16  2:00s
# Metod Koželj reports that the legal date of
# transition to EU rules was 1982-11-27, for all of Yugoslavia at the time.
# Shanks & Pottenger don't give as much detail, so go with Koželj.
			1:00	-	CET	1982 Nov 27
			1:00	EU	CE%sT

# Spain
#
# From Paul Eggert (2016-12-14):
#
# The source for Europe/Madrid before 2013 is:
# Planesas P. La hora oficial en España y sus cambios.
# Anuario del Observatorio Astronómico de Madrid (2013, in Spanish).
# http://astronomia.ign.es/rknowsys-theme/images/webAstro/paginas/documentos/Anuario/lahoraoficialenespana.pdf
# As this source says that historical time in the Canaries is obscure,
# and it does not discuss Ceuta, stick with Shanks for now for that data.
#
# In the 1918 and 1919 fallback transitions in Spain, the clock for
# the hour-longer day officially kept going after midnight, so that
# the repeated instances of that day's 00:00 hour were 24 hours apart,
# with a fallback transition from the second occurrence of 00:59... to
# the next day's 00:00.  Our data format cannot represent this
# directly, and instead repeats the first hour of the next day, with a
# fallback transition from the next day's 00:59... to 00:00.

# From Michael Deckers (2016-12-15):
# The Royal Decree of 1900-07-26 quoted by Planesas, online at
# https://www.boe.es/datos/pdfs/BOE//1900/209/A00383-00384.pdf
# says in its article 5 (my translation):
# These dispositions will enter into force beginning with the
# instant at which, according to the time indicated in article 1,
# the 1st day of January of 1901 will begin.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Spain	1918	only	-	Apr	15	23:00	1:00	S
Rule	Spain	1918	1919	-	Oct	 6	24:00s	0	-
Rule	Spain	1919	only	-	Apr	 6	23:00	1:00	S
Rule	Spain	1924	only	-	Apr	16	23:00	1:00	S
Rule	Spain	1924	only	-	Oct	 4	24:00s	0	-
Rule	Spain	1926	only	-	Apr	17	23:00	1:00	S
Rule	Spain	1926	1929	-	Oct	Sat>=1	24:00s	0	-
Rule	Spain	1927	only	-	Apr	 9	23:00	1:00	S
Rule	Spain	1928	only	-	Apr	15	 0:00	1:00	S
Rule	Spain	1929	only	-	Apr	20	23:00	1:00	S
# Republican Spain during the civil war; it controlled Madrid until 1939-03-28.
Rule	Spain	1937	only	-	Jun	16	23:00	1:00	S
Rule	Spain	1937	only	-	Oct	 2	24:00s	0	-
Rule	Spain	1938	only	-	Apr	 2	23:00	1:00	S
Rule	Spain	1938	only	-	Apr	30	23:00	2:00	M
Rule	Spain	1938	only	-	Oct	 2	24:00	1:00	S
# The following rules are for unified Spain again.
#
# Planesas does not say what happened in Madrid between its fall on
# 1939-03-28 and the Nationalist spring-forward transition on
# 1939-04-15.  For lack of better info, assume Madrid's clocks did not
# change during that period.
#
# The first rule is commented out, as it is redundant for Republican Spain.
#Rule	Spain	1939	only	-	Apr	15	23:00	1:00	S
Rule	Spain	1939	only	-	Oct	 7	24:00s	0	-
Rule	Spain	1942	only	-	May	 2	23:00	1:00	S
Rule	Spain	1942	only	-	Sep	 1	 1:00	0	-
Rule	Spain	1943	1946	-	Apr	Sat>=13	23:00	1:00	S
Rule	Spain	1943	1944	-	Oct	Sun>=1	 1:00	0	-
Rule	Spain	1945	1946	-	Sep	lastSun	 1:00	0	-
Rule	Spain	1949	only	-	Apr	30	23:00	1:00	S
Rule	Spain	1949	only	-	Oct	 2	 1:00	0	-
Rule	Spain	1974	1975	-	Apr	Sat>=12	23:00	1:00	S
Rule	Spain	1974	1975	-	Oct	Sun>=1	 1:00	0	-
Rule	Spain	1976	only	-	Mar	27	23:00	1:00	S
Rule	Spain	1976	1977	-	Sep	lastSun	 1:00	0	-
Rule	Spain	1977	only	-	Apr	 2	23:00	1:00	S
Rule	Spain	1978	only	-	Apr	 2	 2:00s	1:00	S
Rule	Spain	1978	only	-	Oct	 1	 2:00s	0	-
# Nationalist Spain during the civil war
#Rule NatSpain	1937	only	-	May	22	23:00	1:00	S
#Rule NatSpain	1937	1938	-	Oct	Sat>=1	24:00s	0	-
#Rule NatSpain	1938	only	-	Mar	26	23:00	1:00	S
# The following rules are copied from Morocco from 1967 through 1978,
# except with "S" letters.
Rule SpainAfrica 1967	only	-	Jun	 3	12:00	1:00	S
Rule SpainAfrica 1967	only	-	Oct	 1	 0:00	0	-
Rule SpainAfrica 1974	only	-	Jun	24	 0:00	1:00	S
Rule SpainAfrica 1974	only	-	Sep	 1	 0:00	0	-
Rule SpainAfrica 1976	1977	-	May	 1	 0:00	1:00	S
Rule SpainAfrica 1976	only	-	Aug	 1	 0:00	0	-
Rule SpainAfrica 1977	only	-	Sep	28	 0:00	0	-
Rule SpainAfrica 1978	only	-	Jun	 1	 0:00	1:00	S
Rule SpainAfrica 1978	only	-	Aug	 4	 0:00	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Madrid	-0:14:44 -	LMT	1901 Jan  1  0:00u
			 0:00	Spain	WE%sT	1940 Mar 16 23:00
			 1:00	Spain	CE%sT	1979
			 1:00	EU	CE%sT
Zone	Africa/Ceuta	-0:21:16 -	LMT	1901 Jan  1  0:00u
			 0:00	-	WET	1918 May  6 23:00
			 0:00	1:00	WEST	1918 Oct  7 23:00
			 0:00	-	WET	1924
			 0:00	Spain	WE%sT	1929
			 0:00	-	WET	1967 # Help zishrink.awk.
			 0:00 SpainAfrica WE%sT	1984 Mar 16
			 1:00	-	CET	1986
			 1:00	EU	CE%sT
Zone	Atlantic/Canary	-1:01:36 -	LMT	1922 Mar # Las Palmas de Gran C.
			-1:00	-	%z	1946 Sep 30  1:00
			 0:00	-	WET	1980 Apr  6  0:00s
			 0:00	1:00	WEST	1980 Sep 28  1:00u
			 0:00	EU	WE%sT
# IATA SSIM (1996-09) says the Canaries switch at 2:00u, not 1:00u.
# Ignore this for now, as the Canaries are part of the EU.


# Germany (Busingen enclave)
# Liechtenstein
# Switzerland
#
# From Howse:
# By the end of the 18th century clocks and watches became commonplace
# and their performance improved enormously.  Communities began to keep
# mean time in preference to apparent time - Geneva from 1780 ....
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
# From Whitman (who writes "Midnight?"):
# Rule	Swiss	1940	only	-	Nov	 2	0:00	1:00	S
# Rule	Swiss	1940	only	-	Dec	31	0:00	0	-
# From Shanks & Pottenger:
# Rule	Swiss	1941	1942	-	May	Sun>=1	2:00	1:00	S
# Rule	Swiss	1941	1942	-	Oct	Sun>=1	0:00	0	-

# From Alois Treindl (2008-12-17):
# I have researched the DST usage in Switzerland during the 1940ies.
#
# As I wrote in an earlier message, I suspected the current tzdata values
# to be wrong. This is now verified.
#
# I have found copies of the original ruling by the Swiss Federal
# government, in 'Eidgenössische Gesetzessammlung 1941 and 1942' (Swiss
# federal law collection)...
#
# DST began on Monday 5 May 1941, 1:00 am by shifting the clocks to 2:00 am
# DST ended on Monday 6 Oct 1941, 2:00 am by shifting the clocks to 1:00 am.
#
# DST began on Monday, 4 May 1942 at 01:00 am
# DST ended on Monday, 5 Oct 1942 at 02:00 am
#
# There was no DST in 1940, I have checked the law collection carefully.
# It is also indicated by the fact that the 1942 entry in the law
# collection points back to 1941 as a reference, but no reference to any
# other years are made.
#
# Newspaper articles I have read in the archives on 6 May 1941 reported
# about the introduction of DST (Sommerzeit in German) during the previous
# night as an absolute novelty, because this was the first time that such
# a thing had happened in Switzerland.
#
# I have also checked 1916, because one book source (Gabriel, Traité de
# l'heure dans le monde) claims that Switzerland had DST in 1916. This is
# false, no official document could be found. Probably Gabriel got misled
# by references to Germany, which introduced DST in 1916 for the first time.
#
# The tzdata rules for Switzerland must be changed to:
# Rule  Swiss   1941    1942    -       May     Mon>=1  1:00    1:00    S
# Rule  Swiss   1941    1942    -       Oct     Mon>=1  2:00    0       -
#
# The 1940 rules must be deleted.
#
# One further detail for Switzerland, which is probably out of scope for
# most users of tzdata: The [Europe/Zurich zone] ...
# describes all of Switzerland correctly, with the exception of
# the Canton de Genève (Geneva, Genf). Between 1848 and 1894 Geneva did not
# follow Bern Mean Time but kept its own local mean time.
# To represent this, an extra zone would be needed.
#
# From Alois Treindl (2013-09-11):
# The Federal regulations say
# https://www.admin.ch/opc/de/classified-compilation/20071096/index.html
# ... the meridian for Bern mean time ... is 7° 26' 22.50".
# Expressed in time, it is 0h29m45.5s.

# From Pierre-Yves Berger (2013-09-11):
# the "Circulaire du conseil fédéral" (December 11 1893)
# http://www.amtsdruckschriften.bar.admin.ch/viewOrigDoc.do?id=10071353
# clearly states that the [1894-06-01] change should be done at midnight
# but if no one is present after 11 at night, could be postponed until one
# hour before the beginning of service.

# From Paul Eggert (2024-05-24):
# Express BMT as 0:29:45.500, approximately the same precision 7° 26' 22.50".
#
# We can find no reliable source for Shanks's assertion that all of Switzerland
# except Geneva switched to Bern Mean Time at 00:00 on 1848-09-12.  This book:
#
#	Jakob Messerli. Gleichmässig, pünktlich, schnell. Zeiteinteilung und
#	Zeitgebrauch in der Schweiz im 19. Jahrhundert. Chronos, Zurich 1995,
#	ISBN 3-905311-68-2, OCLC 717570797.
#
# suggests that the transition was more gradual, and that the Swiss did not
# agree about civil time during the transition.  The timekeeping it gives the
# most detail for is postal and telegraph time: here, federal legislation (the
# "Bundesgesetz über die Erstellung von elektrischen Telegraphen") passed on
# 1851-11-23, and an official implementation notice was published 1853-07-16
# (Bundesblatt 1853, Bd. II, S. 859).  On p 72 Messerli writes that in
# practice since July 1853 Bernese time was used in "all postal and telegraph
# offices in Switzerland from Geneva to St. Gallen and Basel to Chiasso"
# (Google translation).  For now, model this transition as occurring on
# 1853-07-16, though it probably occurred at some other date in Zurich, and
# legal civil time probably changed at still some other transition date.

# From Tobias Conradi (2011-09-12):
# Büsingen <http://www.buesingen.de>, surrounded by the Swiss canton
# Schaffhausen, did not start observing DST in 1980 as the rest of DE
# (West Germany at that time) and DD (East Germany at that time) did.
# DD merged into DE, the area is currently covered by code DE in ISO 3166-1,
# which in turn is covered by the zone Europe/Berlin.
#
# Source for the time in Büsingen 1980:
# http://www.srf.ch/player/video?id=c012c029-03b7-4c2b-9164-aa5902cd58d3
#
# From Arthur David Olson (2012-03-03):
# Büsingen and Zurich have shared clocks since 1970.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Swiss	1941	1942	-	May	Mon>=1	1:00	1:00	S
Rule	Swiss	1941	1942	-	Oct	Mon>=1	2:00	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Zurich	0:34:08 -	LMT	1853 Jul 16 # See above comment.
		#STDOFF	0:29:45.500
			0:29:46	-	BMT	1894 Jun    # Bern Mean Time
			1:00	Swiss	CE%sT	1981
			1:00	EU	CE%sT

# Turkey

# From Alois Treindl (2019-08-12):
# http://www.astrolojidergisi.com/yazsaati.htm has researched the time zone
# history of Turkey, based on newspaper archives and official documents.
# From Paul Eggert (2019-08-28):
# That source (Oya Vulaş, "Türkiye'de Yaz Saati Uygulamaları")
# is used for 1940/1972, where it seems more reliable than our other
# sources.

# From Kıvanç Yazan (2019-08-12):
# http://www.resmigazete.gov.tr/arsiv/14539.pdf#page=24
# 1973-06-03 01:00 -> 02:00, 1973-11-04 02:00 -> 01:00
#
# http://www.resmigazete.gov.tr/arsiv/14829.pdf#page=1
# 1974-03-31 02:00 -> 03:00, 1974-11-03 02:00 -> 01:00
#
# http://www.resmigazete.gov.tr/arsiv/15161.pdf#page=1
# 1975-03-22 02:00 -> 03:00, 1975-11-02 02:00 -> 01:00
#
# http://www.resmigazete.gov.tr/arsiv/15535_1.pdf#page=1
# 1976-03-21 02:00 -> 03:00, 1976-10-31 02:00 -> 01:00
#
# http://www.resmigazete.gov.tr/arsiv/15778.pdf#page=5
# 1977-04-03 02:00 -> 03:00, 1977-10-16 02:00 -> 01:00,
# 1978-04-02 02:00 -> 03:00 (not applied, see below)
# 1978-10-15 02:00 -> 01:00 (not applied, see below)
# 1979-04-01 02:00 -> 03:00 (not applied, see below)
# 1979-10-14 02:00 -> 01:00 (not applied, see below)
#
# http://www.resmigazete.gov.tr/arsiv/16245.pdf#page=17
# This cancels the previous decision, and repeats it only for 1978.
# 1978-04-02 02:00 -> 03:00, 1978-10-15 02:00 -> 01:00
# (not applied due to standard TZ change below)
#
# http://www.resmigazete.gov.tr/arsiv/16331.pdf#page=3
# This decision changes the default longitude for Turkish time zone from 30
# degrees East to 45 degrees East.  This means a standard TZ change, from +2
# to +3.  This is published & applied on 1978-06-29.  At that time, Turkey was
# already on summer time (already on 45E).  Hence, this new law just meant an
# "continuous summer time".  Note that this was reversed in a few years.
#
# http://www.resmigazete.gov.tr/arsiv/18119_1.pdf#page=1
# 1983-07-31 02:00 -> 03:00 (note that this jumps TZ to +4)
# 1983-10-02 02:00 -> 01:00 (back to +3)
#
# http://www.resmigazete.gov.tr/arsiv/18561.pdf (page 1 and 34)
# At this time, Turkey is still on +3 with no spring-forward on early
# 1984.  This decision is published on 10/31/1984.  Page 1 declares
# the decision of reverting the "default longitude change".  So the
# standard time should go back to +3 (30E).  And page 34 explains when
# that will happen: 1984-11-01 02:00 -> 01:00.  You can think of this
# as "end of continuous summer time, change of standard time zone".
#
# http://www.resmigazete.gov.tr/arsiv/18713.pdf#page=1
# 1985-04-20 01:00 -> 02:00, 1985-09-28 02:00 -> 01:00

# From Kıvanç Yazan (2016-09-25):
# 1) For 1986-2006, DST started at 01:00 local and ended at 02:00 local, with
#    no exceptions.
# 2) 1994's lastSun was overridden with Mar 20 ...
# Here are official papers:
# http://www.resmigazete.gov.tr/arsiv/19032.pdf#page=2 for 1986
# http://www.resmigazete.gov.tr/arsiv/19400.pdf#page=4 for 1987
# http://www.resmigazete.gov.tr/arsiv/19752.pdf#page=15 for 1988
# http://www.resmigazete.gov.tr/arsiv/20102.pdf#page=6 for 1989
# http://www.resmigazete.gov.tr/arsiv/20464.pdf#page=1 for 1990 - 1992
# http://www.resmigazete.gov.tr/arsiv/21531.pdf#page=15 for 1993 - 1995
# http://www.resmigazete.gov.tr/arsiv/21879.pdf#page=1 for overriding 1994
# http://www.resmigazete.gov.tr/arsiv/22588.pdf#page=1 for 1996, 1997
# http://www.resmigazete.gov.tr/arsiv/23286.pdf#page=10 for 1998 - 2000
# http://www.resmigazete.gov.tr/eskiler/2001/03/20010324.htm#2  - for 2001
# http://www.resmigazete.gov.tr/eskiler/2002/03/20020316.htm#2  - for 2002-2006
# From Paul Eggert (2016-09-25):
# Prefer the above sources to Shanks & Pottenger for timestamps after 1985.

# From Steffen Thorsen (2007-03-09):
# Starting 2007 though, it seems that they are adopting EU's 1:00 UTC
# start/end time, according to the following page (2007-03-07):
# http://www.ntvmsnbc.com/news/402029.asp
# The official document is located here - it is in Turkish...:
# http://rega.basbakanlik.gov.tr/eskiler/2007/03/20070307-7.htm
# I was able to locate the following seemingly official document
# (on a non-government server though) describing dates between 2002 and 2006:
# http://www.alomaliye.com/bkk_2002_3769.htm

# From Gökdeniz Karadağ (2011-03-10):
# According to the articles linked below, Turkey will change into summer
# time zone (GMT+3) on March 28, 2011 at 3:00 a.m. instead of March 27.
# This change is due to a nationwide exam on 27th.
# https://www.worldbulletin.net/?aType=haber&ArticleID=70872
# Turkish:
# https://www.hurriyet.com.tr/yaz-saati-uygulamasi-bir-gun-ileri-alindi-17230464

# From Faruk Pasin (2014-02-14):
# The DST for Turkey has been changed for this year because of the
# Turkish Local election....
# http://www.sabah.com.tr/Ekonomi/2014/02/12/yaz-saatinde-onemli-degisiklik
# ... so Turkey will move clocks forward one hour on March 31 at 3:00 a.m.
# From Randal L. Schwartz (2014-04-15):
# Having landed on a flight from the states to Istanbul (via AMS) on March 31,
# I can tell you that NOBODY (even the airlines) respected this timezone DST
# change delay.  Maybe the word just didn't get out in time.
# From Paul Eggert (2014-06-15):
# The press reported massive confusion, as election officials obeyed the rule
# change but cell phones (and airline baggage systems) did not.  See:
# Kostidis M. Eventful elections in Turkey. Balkan News Agency
# http://www.balkaneu.com/eventful-elections-turkey/ 2014-03-30.
# I guess the best we can do is document the official time.

# From Fatih (2015-09-29):
# It's officially announced now by the Ministry of Energy.
# Turkey delays winter time to 8th of November 04:00
# http://www.aa.com.tr/tr/turkiye/yaz-saati-uygulamasi-8-kasimda-sona-erecek/362217
#
# From BBC News (2015-10-25):
# Confused Turks are asking "what's the time?" after automatic clocks defied a
# government decision ... "For the next two weeks #Turkey is on EEST... Erdogan
# Engineered Standard Time," said Twitter user @aysekarahasan.
# http://www.bbc.com/news/world-europe-34631326

# From Burak AYDIN (2016-09-08):
# Turkey will stay in Daylight Saving Time even in winter....
# http://www.resmigazete.gov.tr/eskiler/2016/09/20160908-2.pdf
#
# From Paul Eggert (2016-09-07):
# The change is permanent, so this is the new standard time in Turkey.
# It takes effect today, which is not much notice.

# From Kıvanç Yazan (2017-10-28):
# Turkey will go back to Daylight Saving Time starting 2018-10.
# http://www.resmigazete.gov.tr/eskiler/2017/10/20171028-5.pdf
#
# From Even Scharning (2017-11-08):
# ... today it was announced that the DST will become "continuous":
# http://www.hurriyet.com.tr/son-dakika-yaz-saati-uygulamasi-surekli-hale-geldi-40637482
# From Paul Eggert (2017-11-08):
# Although Google Translate misfires on that source, it looks like
# Turkey reversed last month's decision, and so will stay at +03.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Turkey	1916	only	-	May	 1	0:00	1:00	S
Rule	Turkey	1916	only	-	Oct	 1	0:00	0	-
Rule	Turkey	1920	only	-	Mar	28	0:00	1:00	S
Rule	Turkey	1920	only	-	Oct	25	0:00	0	-
Rule	Turkey	1921	only	-	Apr	 3	0:00	1:00	S
Rule	Turkey	1921	only	-	Oct	 3	0:00	0	-
Rule	Turkey	1922	only	-	Mar	26	0:00	1:00	S
Rule	Turkey	1922	only	-	Oct	 8	0:00	0	-
# Whitman gives 1923 Apr 28 - Sep 16 and no DST in 1924-1925;
# go with Shanks & Pottenger.
Rule	Turkey	1924	only	-	May	13	0:00	1:00	S
Rule	Turkey	1924	1925	-	Oct	 1	0:00	0	-
Rule	Turkey	1925	only	-	May	 1	0:00	1:00	S
Rule	Turkey	1940	only	-	Jul	 1	0:00	1:00	S
Rule	Turkey	1940	only	-	Oct	 6	0:00	0	-
Rule	Turkey	1940	only	-	Dec	 1	0:00	1:00	S
Rule	Turkey	1941	only	-	Sep	21	0:00	0	-
Rule	Turkey	1942	only	-	Apr	 1	0:00	1:00	S
Rule	Turkey	1945	only	-	Oct	 8	0:00	0	-
Rule	Turkey	1946	only	-	Jun	 1	0:00	1:00	S
Rule	Turkey	1946	only	-	Oct	 1	0:00	0	-
Rule	Turkey	1947	1948	-	Apr	Sun>=16	0:00	1:00	S
Rule	Turkey	1947	1951	-	Oct	Sun>=2	0:00	0	-
Rule	Turkey	1949	only	-	Apr	10	0:00	1:00	S
Rule	Turkey	1950	only	-	Apr	16	0:00	1:00	S
Rule	Turkey	1951	only	-	Apr	22	0:00	1:00	S
# DST for 15 months; unusual but we'll let it pass.
Rule	Turkey	1962	only	-	Jul	15	0:00	1:00	S
Rule	Turkey	1963	only	-	Oct	30	0:00	0	-
Rule	Turkey	1964	only	-	May	15	0:00	1:00	S
Rule	Turkey	1964	only	-	Oct	 1	0:00	0	-
Rule	Turkey	1973	only	-	Jun	 3	1:00	1:00	S
Rule	Turkey	1973	1976	-	Oct	Sun>=31	2:00	0	-
Rule	Turkey	1974	only	-	Mar	31	2:00	1:00	S
Rule	Turkey	1975	only	-	Mar	22	2:00	1:00	S
Rule	Turkey	1976	only	-	Mar	21	2:00	1:00	S
Rule	Turkey	1977	1978	-	Apr	Sun>=1	2:00	1:00	S
Rule	Turkey	1977	1978	-	Oct	Sun>=15	2:00	0	-
Rule	Turkey	1978	only	-	Jun	29	0:00	0	-
Rule	Turkey	1983	only	-	Jul	31	2:00	1:00	S
Rule	Turkey	1983	only	-	Oct	 2	2:00	0	-
Rule	Turkey	1985	only	-	Apr	20	1:00s	1:00	S
Rule	Turkey	1985	only	-	Sep	28	1:00s	0	-
Rule	Turkey	1986	1993	-	Mar	lastSun	1:00s	1:00	S
Rule	Turkey	1986	1995	-	Sep	lastSun	1:00s	0	-
Rule	Turkey	1994	only	-	Mar	20	1:00s	1:00	S
Rule	Turkey	1995	2006	-	Mar	lastSun	1:00s	1:00	S
Rule	Turkey	1996	2006	-	Oct	lastSun	1:00s	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Istanbul	1:55:52 -	LMT	1880
			1:56:56	-	IMT	1910 Oct # Istanbul Mean Time?
			2:00	Turkey	EE%sT	1978 Jun 29
			3:00	Turkey	%z	1984 Nov  1  2:00
			2:00	Turkey	EE%sT	2007
			2:00	EU	EE%sT	2011 Mar 27  1:00u
			2:00	-	EET	2011 Mar 28  1:00u
			2:00	EU	EE%sT	2014 Mar 30  1:00u
			2:00	-	EET	2014 Mar 31  1:00u
			2:00	EU	EE%sT	2015 Oct 25  1:00u
			2:00	1:00	EEST	2015 Nov  8  1:00u
			2:00	EU	EE%sT	2016 Sep  7
			3:00	-	%z

# Ukraine
#
# From Alois Treindl (2014-03-01):
# REGULATION A N O V A on March 20, 1992 N 139 ...  means that from
# 1992 on, Ukraine had DST with begin time at 02:00 am, on last Sunday
# in March, and end time 03:00 am, last Sunday in September....
# CABINET OF MINISTERS OF UKRAINE RESOLUTION on May 13, 1996 N 509
# "On the order of computation time on the territory of Ukraine" ....
# As this cabinet decision is from May 1996, it seems likely that the
# transition in March 1996, which predates it, was still at 2:00 am
# and not at 3:00 as would have been under EU rules.
# This is why I have set the change to EU rules into May 1996,
# so that the change in March is stil covered by the Ukraine rule.
# The next change in October 1996 happened under EU rules.
#
# From Paul Eggert (2022-08-27):
# For now, assume that Ukraine's zones all followed the same rules,
# except that Crimea switched to Moscow time in 1994 as described elsewhere.

# From Igor Karpov, who works for the Ukrainian Ministry of Justice,
# via Garrett Wollman (2003-01-27):
# BTW, I've found the official document on this matter. It's government
# regulations No. 509, May 13, 1996. In my poor translation it says:
# "Time in Ukraine is set to second timezone (Kiev time). Each last Sunday
# of March at 3am the time is changing to 4am and each last Sunday of
# October the time at 4am is changing to 3am"

# From Alexander Krivenyshev (2011-09-20):
# On September 20, 2011 the deputies of the Verkhovna Rada agreed to
# abolish the transfer clock to winter time.
#
# Bill No. 8330 of MP from the Party of Regions Oleg Nadoshi got
# approval from 266 deputies.
#
# Ukraine abolishes transfer back to the winter time (in Russian)
# http://news.mail.ru/politics/6861560/
#
# The Ukrainians will no longer change the clock (in Russian)
# http://www.segodnya.ua/news/14290482.html
#
# Deputies cancelled the winter time (in Russian)
# https://www.pravda.com.ua/rus/news/2011/09/20/6600616/
#
# From Philip Pizzey (2011-10-18):
# Today my Ukrainian colleagues have informed me that the
# Ukrainian parliament have decided that they will go to winter
# time this year after all.
#
# From Udo Schwedt (2011-10-18):
# As far as I understand, the recent change to the Ukrainian time zone
# (Europe/Kiev) to introduce permanent daylight saving time (similar
# to Russia) was reverted today:
# http://portal.rada.gov.ua/rada/control/en/publish/article/info_left?art_id=287324&cat_id=105995
#
# Also reported by Alexander Bokovoy (2011-10-18) who also noted:
# The law documents themselves are at
# http://w1.c1.rada.gov.ua/pls/zweb_n/webproc4_1?id=&pf3511=41484

# From Vladimir in Moscow via Alois Treindl re Kyiv time 1991/2 (2014-02-28):
# First in Ukraine they changed Time zone from UTC+3 to UTC+2 with DST:
#       03 25 1990 02:00 -03.00 1       Time Zone 3 with DST
#       07 01 1990 02:00 -02.00 1       Time Zone 2 with DST
# * Ukrainian Government's Resolution of 18.06.1990, No. 134.
# http://search.ligazakon.ua/l_doc2.nsf/link1/T001500.html
#
# They did not end DST in September, 1990 (according to the law,
# "summer time" was still in action):
#       09 30 1990 03:00 -02.00 1       Time Zone 2 with DST
# * Ukrainian Government's Resolution of 21.09.1990, No. 272.
# http://search.ligazakon.ua/l_doc2.nsf/link1/KP900272.html
#
# Again no change in March, 1991 ("summer time" in action):
#       03 31 1991 02:00 -02.00 1       Time Zone 2 with DST
#
# DST ended in September 1991 ("summer time" ended):
#       09 29 1991 03:00 -02.00 0       Time Zone 2, no DST
# * Ukrainian Government's Resolution of 25.09.1991, No. 225.
# http://www.uazakon.com/documents/date_21/pg_iwgdoc.htm
# This is an answer.
#
# Since 1992 they had normal DST procedure:
#       03 29 1992 02:00 -02.00 1       DST started
#       09 27 1992 03:00 -02.00 0       DST ended
# * Ukrainian Government's Resolution of 20.03.1992, No. 139.
# http://www.uazakon.com/documents/date_8u/pg_grcasa.htm

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Europe/Kyiv	2:02:04 -	LMT	1880
			2:02:04	-	KMT	1924 May  2 # Kyiv Mean Time
			2:00	-	EET	1930 Jun 21
			3:00	-	MSK	1941 Sep 20
			1:00	C-Eur	CE%sT	1943 Nov  6
			3:00	Russia	MSK/MSD	1990 Jul  1  2:00
			2:00	1:00	EEST	1991 Sep 29  3:00
			2:00	C-Eur	EE%sT	1996 May 13
			2:00	EU	EE%sT

###############################################################################

# One source shows that Bulgaria, Cyprus, Finland, and Greece observe DST from
# the last Sunday in March to the last Sunday in September in 1986.
# The source shows Romania changing a day later than everybody else.
#
# According to Bernard Sieloff's source, Poland is in the MET time zone but
# uses the WE DST rules.  The Western USSR uses EET+1 and ME DST rules.
# Bernard Sieloff's source claims Romania switches on the same day, but at
# 00:00 standard time (i.e., 01:00 DST).  It also claims that Turkey
# switches on the same day, but switches on at 01:00 standard time
# and off at 00:00 standard time (i.e., 01:00 DST)

# ...
# Date: Wed, 28 Jan 87 16:56:27 -0100
# From: Tom Hofmann
# ...
#
# ...the European time rules are...standardized since 1981, when
# most European countries started DST.  Before that year, only
# a few countries (UK, France, Italy) had DST, each according
# to own national rules.  In 1981, however, DST started on
# 'Apr firstSun', and not on 'Mar lastSun' as in the following
# years...
# But also since 1981 there are some more national exceptions
# than listed in 'europe': Switzerland, for example, joined DST
# one year later, Denmark ended DST on 'Oct 1' instead of 'Sep
# lastSun' in 1981 - I don't know how they handle now.
#
# Finally, DST ist always from 'Apr 1' to 'Oct 1' in the
# Soviet Union (as far as I know).
#
# Tom Hofmann, Scientific Computer Center, CIBA-GEIGY AG,
# 4002 Basle, Switzerland
# ...

# ...
# Date: Wed, 4 Feb 87 22:35:22 +0100
# From: Dik T. Winter
# ...
#
# The information from Tom Hofmann is (as far as I know) not entirely correct.
# After a request from chongo at amdahl I tried to retrieve all information
# about DST in Europe.  I was able to find all from about 1969.
#
# ...standardization on DST in Europe started in about 1977 with switches on
# first Sunday in April and last Sunday in September...
# In 1981 UK joined Europe insofar that
# the starting day for both shifted to last Sunday in March.  And from 1982
# the whole of Europe used DST, with switch dates April 1 and October 1 in
# the Sov[i]et Union.  In 1985 the SU reverted to standard Europe[a]n switch
# dates...
#
# It should also be remembered that time-zones are not constants; e.g.
# Portugal switched in 1976 from MET (or CET) to WET with DST...
# Note also that though there were rules for switch dates not
# all countries abided to these dates, and many individual deviations
# occurred, though not since 1982 I believe.  Another note: it is always
# assumed that DST is 1 hour ahead of normal time, this need not be the
# case; at least in the Netherlands there have been times when DST was 2 hours
# in advance of normal time.
#
# ...
# dik t. winter, cwi, amsterdam, nederland
# ...

# From Bob Devine (1988-01-28):
# ...
# Greece: Last Sunday in April to last Sunday in September (iffy on dates).
# Since 1978.  Change at midnight.
# ...
# Monaco: has same DST as France.
# ...
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.

# For distributors who don't want to put time zone specification in
# their installation procedures.  Users that run 'date' will get the
# time zone abbreviation "-00", indicating that the actual time zone
# is unknown.

# Zone	NAME	GMTOFF	RULES	FORMAT
Zone	Factory	0	-	-00
# tzdb data for North and Central America and environs

# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.

# also includes Central America and the Caribbean

# This file is by no means authoritative; if you think you know better,
# go ahead and edit the file (and please send any changes to
# tz@iana.org for general use in the future).  For more, please see
# the file CONTRIBUTING in the tz distribution.

# From Paul Eggert (1999-03-22):
# A reliable and entertaining source about time zones is
# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).

###############################################################################

# United States

# From Paul Eggert (1999-03-31):
# Howse writes (pp 121-125) that time zones were invented by
# Professor Charles Ferdinand Dowd (1825-1904),
# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
# His pamphlet "A System of National Time for Railroads" (1870)
# was the result of his proposals at the Convention of Railroad Trunk Lines
# in New York City (1869-10).  His 1870 proposal was based on Washington, DC,
# but in 1872-05 he moved the proposed origin to Greenwich.

# From Paul Eggert (2024-11-18):
# Dowd's proposal left many details unresolved, such as where to draw
# lines between time zones.  Sandford Fleming of the Canadian Pacific Railway
# argued for Dowd's proposal in 1876, and Cleveland Abbe of the American
# Meteorology Society published a report in 1879 recommending four US time
# zones based on GMT.  However, the key individual who made time zones
# work in the US was William Frederick Allen - railway engineer,
# managing editor of the Travelers' Guide, and secretary of the
# General Time Convention, a railway standardization group.  Allen
# spent months in dialogs with scientific and railway leaders,
# developed a workable plan to institute time zones, and presented it
# to the General Time Convention on 1883-04-11, saying that his plan
# meant "local time would be practically abolished" - a plus for
# railway scheduling.  By the next convention on 1883-10-11 nearly all
# railroads had agreed and it took effect on 1883-11-18.  That Sunday
# was called the "day of two noons", as some locations observed noon
# twice.  Allen witnessed the transition in New York City, writing:
#
#   I heard the bells of St. Paul's strike on the old time.  Four
#   minutes later, obedient to the electrical signal from the Naval
#   Observatory ... the time-ball made its rapid descent, the chimes
#   of old Trinity rang twelve measured strokes, and local time was
#   abandoned, probably forever.
#
# Most of the US soon followed suit.  See:
# Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56.
# https://dx.doi.org/10.2307/3105430

# From Paul Eggert (2005-04-16):
# That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).

# From Paul Eggert (2006-03-22):
# A good source for time zone historical data in the US is
# Thomas G. Shanks, The American Atlas (5th edition),
# San Diego: ACS Publications, Inc. (1991).
# Make sure you have the errata sheet; the book is somewhat useless without it.
# It is the source for most of the pre-1991 US entries below.

# From Paul Eggert (2001-03-06):
# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
# in his whimsical essay "An Economical Project for Diminishing the Cost
# of Light" published in the Journal de Paris (1784-04-26).
# Not everyone is happy with the results:
#
#	I don't really care how time is reckoned so long as there is some
#	agreement about it, but I object to being told that I am saving
#	daylight when my reason tells me that I am doing nothing of the kind.
#	I even object to the implication that I am wasting something
#	valuable if I stay in bed after the sun has risen.  As an admirer
#	of moonlight I resent the bossy insistence of those who want to
#	reduce my time for enjoying it.  At the back of the Daylight Saving
#	scheme I detect the bony, blue-fingered hand of Puritanism, eager
#	to push people into bed earlier, and get them up earlier, to make
#	them healthy, wealthy and wise in spite of themselves.
#
#	 -- Robertson Davies, The diary of Samuel Marchbanks,
#	   Clarke, Irwin (1947), XIX, Sunday
#
# For more about the first ten years of DST in the United States, see
# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint
# (Carnegie Library of Pittsburgh, 1927).
# https://web.archive.org/web/20160517155308/http://www.clpgh.org/exhibit/dst.html
#
# Shanks says that DST was called "War Time" in the US in 1918 and 1919.
# However, DST was imposed by the Standard Time Act of 1918, which
# was the first nationwide legal time standard, and apparently
# time was just called "Standard Time" or "Daylight Saving Time".

# From Paul Eggert (2019-06-04):
# Here is the legal basis for the US federal rules.
# * Public Law 65-106 (1918-03-19) implemented standard and daylight saving
#   time for the first time across the US, springing forward on March's last
#   Sunday and falling back on October's last Sunday.
#   https://www.loc.gov/law/help/statutes-at-large/65th-congress/session-2/c65s2ch24.pdf
# * Public Law 66-40 (1919-08-20) repealed DST on October 1919's last Sunday.
#   https://www.loc.gov/law/help/statutes-at-large/66th-congress/session-1/c66s1ch51.pdf
# * Public Law 77-403 (1942-01-20) started wartime DST on 1942-02-09.
#   https://www.loc.gov/law/help/statutes-at-large/77th-congress/session-2/c77s2ch7.pdf
# * Public Law 79-187 (1945-09-25) ended wartime DST on 1945-09-30.
#   https://www.loc.gov/law/help/statutes-at-large/79th-congress/session-1/c79s1ch388.pdf
# * Public Law 89-387 (1966-04-13) reinstituted a national standard for DST,
#   from April's last Sunday to October's last Sunday, effective 1967.
#   https://www.govinfo.gov/content/pkg/STATUTE-80/pdf/STATUTE-80-Pg107.pdf
# * Public Law 93-182 (1973-12-15) moved the 1974 spring-forward to 01-06.
#   https://www.govinfo.gov/content/pkg/STATUTE-87/pdf/STATUTE-87-Pg707.pdf
# * Public Law 93-434 (1974-10-05) moved the 1975 spring-forward to
#   February's last Sunday.
#   https://www.govinfo.gov/content/pkg/STATUTE-88/pdf/STATUTE-88-Pg1209.pdf
# * Public Law 99-359 (1986-07-08) moved the spring-forward to April's first
#   Sunday.
#   https://www.govinfo.gov/content/pkg/STATUTE-100/pdf/STATUTE-100-Pg764.pdf
# * Public Law 109-58 (2005-08-08), effective 2007, moved the spring-forward
#   to March's second Sunday and the fall-back to November's first Sunday.
#   https://www.govinfo.gov/content/pkg/PLAW-109publ58/pdf/PLAW-109publ58.pdf
# All transitions are at 02:00 local time.

# From Arthur David Olson:
# Before the Uniform Time Act of 1966 took effect in 1967, observance of
# Daylight Saving Time in the US was by local option, except during wartime.

# From Arthur David Olson (2000-09-25):
# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
# In the introduction, Oboler spoke of "Eastern Peace Time."
# An AltaVista search turned up:
# https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html
# "When the time is announced over the radio now, it is 'Eastern Peace
# Time' instead of the old familiar 'Eastern War Time.'  Peace is wonderful."
# (August 1945) by way of confirmation.
#
# From Paul Eggert (2017-09-23):
# This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter.

# From Joseph Gallant citing
# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
# to switch to London for Attlee's address, but the American people
# never got to hear his speech live. According to one press account,
# CBS' Bob Trout was first to announce the word of Japan's surrender,
# but a few seconds later, NBC, ABC and Mutual also flashed the word
# of surrender, all of whom interrupting the bells of Big Ben in
# London which were to precede Mr. Attlee's speech.

# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout.  From
# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
#
# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
# Any announcement from Asia would reach St. John's New York newsroom on a
# wire service teletype machine, which had prescribed signals for major news.
# Associated Press, for example, would ring five bells before spewing out
# typed copy of an important story, and 10 bells for news "of transcendental
# importance."
#
# On Aug. 14, stalling while talking steadily into the NBC networks' open
# microphone, St. John heard five bells and waited only to hear a sixth bell,
# before announcing confidently: "Ladies and gentlemen, World War II is over.
# The Japanese have agreed to our surrender terms."
#
# He had scored a 20-second scoop on other broadcasters.

# From Arthur David Olson (2005-08-22):
# Paul has been careful to use the "US" rules only in those locations
# that are part of the United States; this reflects the real scope of
# U.S. government action.  So even though the "US" rules have changed
# in the latest release, other countries won't be affected.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	US	1918	1919	-	Mar	lastSun	2:00	1:00	D
Rule	US	1918	1919	-	Oct	lastSun	2:00	0	S
Rule	US	1942	only	-	Feb	9	2:00	1:00	W # War
Rule	US	1945	only	-	Aug	14	23:00u	1:00	P # Peace
Rule	US	1945	only	-	Sep	30	2:00	0	S
Rule	US	1967	2006	-	Oct	lastSun	2:00	0	S
Rule	US	1967	1973	-	Apr	lastSun	2:00	1:00	D
Rule	US	1974	only	-	Jan	6	2:00	1:00	D
Rule	US	1975	only	-	Feb	lastSun	2:00	1:00	D
Rule	US	1976	1986	-	Apr	lastSun	2:00	1:00	D
Rule	US	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
Rule	US	2007	max	-	Mar	Sun>=8	2:00	1:00	D
Rule	US	2007	max	-	Nov	Sun>=1	2:00	0	S

# From U. S. Naval Observatory (1989-01-19):
# USA  EASTERN       5 H  BEHIND UTC    NEW YORK, WASHINGTON
# USA  EASTERN       4 H  BEHIND UTC    APR 3 - OCT 30
# USA  CENTRAL       6 H  BEHIND UTC    CHICAGO, HOUSTON
# USA  CENTRAL       5 H  BEHIND UTC    APR 3 - OCT 30
# USA  MOUNTAIN      7 H  BEHIND UTC    DENVER
# USA  MOUNTAIN      6 H  BEHIND UTC    APR 3 - OCT 30
# USA  PACIFIC       8 H  BEHIND UTC    L.A., SAN FRANCISCO
# USA  PACIFIC       7 H  BEHIND UTC    APR 3 - OCT 30
# USA  ALASKA STD    9 H  BEHIND UTC    MOST OF ALASKA     (AKST)
# USA  ALASKA STD    8 H  BEHIND UTC    APR 3 - OCT 30 (AKDT)
# USA  ALEUTIAN     10 H  BEHIND UTC    ISLANDS WEST OF 170W
# USA    "           9 H  BEHIND UTC    APR 3 - OCT 30
# USA  HAWAII       10 H  BEHIND UTC
# USA  BERING       11 H  BEHIND UTC    SAMOA, MIDWAY

# From Arthur David Olson (1989-01-21):
# The above dates are for 1988.
# Note the "AKST" and "AKDT" abbreviations, the claim that there's
# no DST in Samoa, and the claim that there is DST in Alaska and the
# Aleutians.

# From Arthur David Olson (1988-02-13):
# Legal standard time zone names, from United States Code (1982 Edition and
# Supplement III), Title 15, Chapter 6, Section 260 and forward.  First, names
# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
# took effect), as explained in sections 263 and 261:
#	(none)
#	United States standard eastern time
#	United States standard mountain time
#	United States standard central time
#	United States standard Pacific time
#	(none)
#	United States standard Alaska time
#	(none)
# Next, names from 1967-04-01 until 1983-11-30 (the date for
# public law 98-181):
#	Atlantic standard time
#	eastern standard time
#	central standard time
#	mountain standard time
#	Pacific standard time
#	Yukon standard time
#	Alaska-Hawaii standard time
#	Bering standard time
# And after 1983-11-30:
#	Atlantic standard time
#	eastern standard time
#	central standard time
#	mountain standard time
#	Pacific standard time
#	Alaska standard time
#	Hawaii-Aleutian standard time
#	Samoa standard time
# The law doesn't give abbreviations.
#
# From Paul Eggert (2016-12-19):
# Here are URLs for the 1918 and 1966 legislation:
# http://uscode.house.gov/statviewer.htm?volume=40&page=451
# http://uscode.house.gov/statviewer.htm?volume=80&page=108
# Although the 1918 names were officially "United States Standard
# Eastern Time" and similarly for "Central", "Mountain", "Pacific",
# and "Alaska", in practice "Standard" was placed just before "Time",
# as codified in 1966.  In practice, Alaska time was abbreviated "AST"
# before 1968.  Summarizing the 1967 name changes:
#	1918 names			1967 names
#  -08	Standard Pacific Time (PST)	Pacific standard time (PST)
#  -09	(unofficial) Yukon (YST)	Yukon standard time (YST)
#  -10	Standard Alaska Time (AST)	Alaska-Hawaii standard time (AHST)
#  -11	(unofficial) Nome (NST)		Bering standard time (BST)
#
# From Paul Eggert (2023-01-23), from a 2001-01-08 heads-up from Rives McDow:
# Public law 106-564 (2000-12-23) introduced "Chamorro standard time"
# for time in Guam and the Northern Marianas.  See the file "australasia".
# Also see 15 U.S.C. §263 <https://www.law.cornell.edu/uscode/text/15/263>.
#
# From Paul Eggert (2015-04-17):
# HST and HDT are standardized abbreviations for Hawaii-Aleutian
# standard and daylight times.  See section 9.47 (p 234) of the
# U.S. Government Printing Office Style Manual (2008)
# https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf

# From Arthur David Olson, 2005-08-09
# The following was signed into law on 2005-08-08.
#
# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
#   (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15
#   U.S.C. 260a(a)) is amended--
#     (1) by striking "first Sunday of April" and inserting "second
#     Sunday of March"; and
#     (2) by striking "last Sunday of October" and inserting "first
#     Sunday of November'.
#   (b) Effective Date.--Subsection (a) shall take effect 1 year after the
#   date of enactment of this Act or March 1, 2007, whichever is later.
#   (c) Report to Congress.--Not later than 9 months after the effective
#   date stated in subsection (b), the Secretary shall report to Congress
#   on the impact of this section on energy consumption in the United
#   States.
#   (d) Right to Revert.--Congress retains the right to revert the
#   Daylight Saving Time back to the 2005 time schedules once the
#   Department study is complete.

# US eastern time, represented by New York

# Connecticut, Delaware, District of Columbia, most of Florida,
# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
# New Hampshire, New Jersey, New York, North Carolina, Ohio,
# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
# Vermont, Virginia, West Virginia

# From Dave Cantor (2004-11-02):
# Early this summer I had the occasion to visit the Mount Washington
# Observatory weather station atop (of course!) Mount Washington [, NH]....
# One of the staff members said that the station was on Eastern Standard Time
# and didn't change their clocks for Daylight Saving ... so that their
# reports will always have times which are 5 hours behind UTC.

# From Paul Eggert (2005-08-26):
# According to today's Huntsville Times
# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1
# a few towns on Alabama's "eastern border with Georgia, such as Phenix City
# in Russell County, Lanett in Chambers County and some towns in Lee County,
# set their watches and clocks on Eastern time."  It quotes H.H. "Bubba"
# Roberts, city administrator in Phenix City. as saying "We are in the Central
# time zone, but we do go by the Eastern time zone because so many people work
# in Columbus."
#
# From Paul Eggert (2017-02-22):
# Four cities are involved.  The two not mentioned above are Smiths Station
# and Valley.  Barbara Brooks, Valley's assistant treasurer, heard it started
# because West Point Pepperell textile mills were in Alabama while the
# corporate office was in Georgia, and residents voted to keep Eastern
# time even after the mills closed.  See: Kazek K. Did you know which
# Alabama towns are in a different time zone?  al.com 2017-02-06.
# http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html

# From Paul Eggert (2014-09-06):
# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
# says that New York City Hall time was 3 minutes 58.4 seconds fast of
# Eastern time (i.e., -4:56:01.6) just before the 1883 switch.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
Rule	NYC	1920	only	-	Mar	lastSun	2:00	1:00	D
Rule	NYC	1920	only	-	Oct	lastSun	2:00	0	S
Rule	NYC	1921	1966	-	Apr	lastSun	2:00	1:00	D
Rule	NYC	1921	1954	-	Sep	lastSun	2:00	0	S
Rule	NYC	1955	1966	-	Oct	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
		#STDOFF	-4:56:01.6
Zone America/New_York	-4:56:02 -	LMT	1883 Nov 18 17:00u
			-5:00	US	E%sT	1920
			-5:00	NYC	E%sT	1942
			-5:00	US	E%sT	1946
			-5:00	NYC	E%sT	1967
			-5:00	US	E%sT

# US central time, represented by Chicago

# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
# Washington counties), Illinois, western Indiana
# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
# western Tennessee, most of Texas, Wisconsin

# From Paul Eggert (2018-01-07):
# In 1869 the Chicago Astronomical Society contracted with the city to keep
# time.  Though delayed by the Great Fire, by 1880 a wire ran from the
# Dearborn Observatory (on the University of Chicago campus) to City Hall,
# which then sent signals to police and fire stations.  However, railroads got
# their time signals from the Allegheny Observatory, the Madison Observatory,
# the Ann Arbor Observatory, etc., so their clocks did not agree with each
# other or with the city's official time.  The confusion took some years to
# clear up.  See:
# Moser M. How Chicago gave America its time zones. Chicago. 2018-01-04.
# http://www.chicagomag.com/city-life/January-2018/How-Chicago-Gave-America-Its-Time-Zones/

# From Larry M. Smith (2006-04-26) re Wisconsin:
# https://docs.legis.wisconsin.gov/statutes/statutes/175.pdf
# is currently enforced at the 01:00 time of change.  Because the local
# "bar time" in the state corresponds to 02:00, a number of citations
# are issued for the "sale of class 'B' alcohol after prohibited
# hours" within the deviated hour of this change every year....
#
# From Douglas R. Bomberg (2007-03-12):
# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
# Statue 175 closer in synch with the US Congress' intent....
# https://docs.legis.wisconsin.gov/2007/related/acts/3

# From an email administrator of the City of Fort Pierre, SD (2015-12-21):
# Fort Pierre is technically located in the Mountain time zone as is
# the rest of Stanley County.  Most of Stanley County and Fort Pierre
# uses the Central time zone due to doing most of their business in
# Pierre so it simplifies schedules.  I have lived in Stanley County
# all my life and it has been that way since I can remember.  (43 years!)
#
# From Paul Eggert (2015-12-25):
# Assume this practice predates 1970, so Fort Pierre can use America/Chicago.

# From Paul Eggert (2015-04-06):
# In 1950s Nashville a public clock had dueling faces, one for conservatives
# and the other for liberals; the two sides didn't agree about the time of day.
# I haven't found a photo of this clock, nor have I tracked down the TIME
# magazine report cited below, but here's the story as told by the late
# American journalist John Seigenthaler, who was there:
#
# "The two [newspaper] owners held strongly contrasting political and
# ideological views.  Evans was a New South liberal, Stahlman an Old South
# conservative, and their two papers frequently clashed editorially, often on
# the same day....  In the 1950s as the state legislature was grappling with
# the question of whether to approve daylight saving time for the entire state,
# TIME magazine reported:
#
# "'The Nashville Banner and The Nashville Tennessean rarely agree on anything
# but the time of day - and last week they couldn't agree on that.'
#
# "It was all too true. The clock on the front of the building had two faces -
# The Tennessean side of the building facing west, the other, east.  When it
# was high noon Banner time, it was 11 a.m. Tennessean time."
#
# Seigenthaler J. For 100 years, Tennessean had it covered.
# The Tennessean 2007-05-11, republished 2015-04-06.
# https://www.tennessean.com/story/insider/extras/2015/04/06/archives-seigenthaler-for-100-years-the-tennessean-had-it-covered/25348545/

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
Rule	Chicago	1920	only	-	Jun	13	2:00	1:00	D
Rule	Chicago	1920	1921	-	Oct	lastSun	2:00	0	S
Rule	Chicago	1921	only	-	Mar	lastSun	2:00	1:00	D
Rule	Chicago	1922	1966	-	Apr	lastSun	2:00	1:00	D
Rule	Chicago	1922	1954	-	Sep	lastSun	2:00	0	S
Rule	Chicago	1955	1966	-	Oct	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Chicago	-5:50:36 -	LMT	1883 Nov 18 18:00u
			-6:00	US	C%sT	1920
			-6:00	Chicago	C%sT	1936 Mar  1  2:00
			-5:00	-	EST	1936 Nov 15  2:00
			-6:00	Chicago	C%sT	1942
			-6:00	US	C%sT	1946
			-6:00	Chicago	C%sT	1967
			-6:00	US	C%sT
# Oliver County, ND switched from mountain to central time on 1992-10-25.
Zone America/North_Dakota/Center -6:45:12 - LMT	1883 Nov 18 19:00u
			-7:00	US	M%sT	1992 Oct 25  2:00
			-6:00	US	C%sT
# Morton County, ND, switched from mountain to central time on
# 2003-10-26, except for the area around Mandan which was already central time.
# See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
# Officially this switch also included part of Sioux County, and
# Jones, Mellette, and Todd Counties in South Dakota;
# but in practice these other counties were already observing central time.
# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 19:00u
			-7:00	US	M%sT	2003 Oct 26  2:00
			-6:00	US	C%sT

# From Josh Findley (2011-01-21):
# ...it appears that Mercer County, North Dakota, changed from the
# mountain time zone to the central time zone at the last transition from
# daylight-saving to standard time (on Nov. 7, 2010):
# https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html

# From Andy Lipscomb (2011-01-24):
# ...according to the Census Bureau, the largest city is Beulah (although
# it's commonly referred to as Beulah-Hazen, with Hazen being the next
# largest city in Mercer County).  Google Maps places Beulah's city hall
# at 47° 15' 51" N, 101° 46' 40" W, which yields an offset of 6h47'07".

Zone America/North_Dakota/Beulah -6:47:07 - LMT	1883 Nov 18 19:00u
			-7:00	US	M%sT	2010 Nov  7  2:00
			-6:00	US	C%sT

# US mountain time, represented by Denver
#
# Colorado, far western Kansas, Montana, western
# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
# New Mexico, southwestern North Dakota,
# western South Dakota, far western Texas (El Paso County, Hudspeth County,
# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
#
# From Paul Eggert (2018-10-25):
# On 1921-03-04 federal law placed all of Texas into the central time zone.
# However, El Paso ignored the law for decades and continued to observe
# mountain time, on the grounds that that's what they had always done
# and they weren't about to let the federal government tell them what to do.
# Eventually the federal government gave in and changed the law on
# 1970-04-10 to match what El Paso was actually doing.  Although
# that's slightly after our 1970 cutoff, there is no need to create a
# separate zone for El Paso since they were ignoring the law anyway.  See:
# Long T. El Pasoans were time rebels, fought to stay in Mountain zone.
# El Paso Times. 2018-10-24 06:40 -06.
# https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
Rule	Denver	1920	1921	-	Mar	lastSun	2:00	1:00	D
Rule	Denver	1920	only	-	Oct	lastSun	2:00	0	S
Rule	Denver	1921	only	-	May	22	2:00	0	S
Rule	Denver	1965	1966	-	Apr	lastSun	2:00	1:00	D
Rule	Denver	1965	1966	-	Oct	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Denver	-6:59:56 -	LMT	1883 Nov 18 19:00u
			-7:00	US	M%sT	1920
			-7:00	Denver	M%sT	1942
			-7:00	US	M%sT	1946
			-7:00	Denver	M%sT	1967
			-7:00	US	M%sT

# US Pacific time, represented by Los Angeles
#
# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
# north of the Salmon River, and the towns of Burgdorf and Warren),
# Nevada (except West Wendover), Oregon (except the northern ¾ of
# Malheur county), and Washington

# From Paul Eggert (2016-08-20):
# In early February 1948, in response to California's electricity shortage,
# PG&E changed power frequency from 60 to 59.5 Hz during daylight hours,
# causing electric clocks to lose six minutes per day.  (This did not change
# legal time, and is not part of the data here.)  See:
# Ross SA. An energy crisis from the past: Northern California in 1948.
# Working Paper No. 8, Institute of Governmental Studies, UC Berkeley,
# 1973-11.  https://escholarship.org/uc/item/8x22k30c
#
# In another measure to save electricity, DST was instituted from 1948-03-14
# at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move
# the fallback transition earlier.  See pages 3-4 of:
# http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf
#
# In response:
#
#   Governor Warren received a torrent of objecting mail, and it is not too much
#   to speculate that the objections to Daylight Saving Time were one important
#   factor in the defeat of the Dewey-Warren Presidential ticket in California.
#     -- Ross, p 25
#
# On December 8 the governor exercised the option, setting the date to January 1
# (LA Times 1948-12-09).  The transition time was 02:00 (LA Times 1949-01-01).
#
# Despite the controversy, in 1949 California voters approved Proposition 12,
# which established DST from April's last Sunday at 01:00 until September's
# last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed
# the fall-back date to October's last Sunday. See:
# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props
# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
Rule	CA	1948	only	-	Mar	14	2:01	1:00	D
Rule	CA	1949	only	-	Jan	 1	2:00	0	S
Rule	CA	1950	1966	-	Apr	lastSun	1:00	1:00	D
Rule	CA	1950	1961	-	Sep	lastSun	2:00	0	S
Rule	CA	1962	1966	-	Oct	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Los_Angeles -7:52:58 -	LMT	1883 Nov 18 20:00u
			-8:00	US	P%sT	1946
			-8:00	CA	P%sT	1967
			-8:00	US	P%sT

# Alaska
# AK%sT is the modern abbreviation for -09 per USNO.
#
# From Paul Eggert (2017-06-15):
# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
# On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the
# Russian forts and fleet at Sitka fired salutes to mark the ceremony of
# formal transfer.  See the Sacramento Daily Union (1867-11-14), p 3, col 2.
# https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1
# Sitka workers did not change their calendars until Sunday, 1867-10-20,
# and so celebrated two Sundays that week.  See: Ahllund T (tr Hallamaa P).
# From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25.
# http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf
# Include only the time zone part of this transition, ignoring the switch
# from Julian to Gregorian, since we can't represent the Julian calendar.
#
# As far as we know, of the locations mentioned below only Sitka was
# permanently inhabited in 1867 by anyone using either calendar.
# (Yakutat was colonized by the Russians in 1799, but the settlement was
# destroyed in 1805 by a Yakutat-kon war party.)  Many of Alaska's inhabitants
# were unaware of the US acquisition of Alaska, much less of any calendar or
# time change.  However, the Russian-influenced part of Alaska did observe
# Russian time, and it is more accurate to model this than to ignore it.
# The database format requires an exact transition time; use the Russian
# salute as a somewhat-arbitrary time for the formal transfer of control for
# all of Alaska.  Sitka's UTC offset is -9:01:13; adjust its 15:30 to the
# local times of other Alaskan locations so that they change simultaneously.

# From Paul Eggert (2014-07-18):
# One opinion of the early 1980s turmoil in Alaska over time zones and
# daylight saving time appeared as graffiti on a Juneau airport wall:
# "Welcome to Juneau.  Please turn your watch back to the 19th century."
# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01.
# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html
#
# Steve Ferguson (2011-01-31) referred to the following source:
# Norris F. Keeping time in Alaska: national directives, local response.
# Alaska History 2001;16(1-2).
# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/

# From Arthur David Olson (2011-02-01):
# Here's database-relevant material from the 2001 "Alaska History" article:
#
# On September 20 [1979]...DOT...officials decreed that on April 27,
# 1980, Juneau and other nearby communities would move to Yukon Time.
# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on
# Pacific Time.
#
# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the
# Department's September 1979 decision. Juneau and other communities in
# northern Southeast reverted to Pacific Time on October 26.
#
# On October 28 [1983]...the Metlakatla Indian Community Council voted
# unanimously to keep the reservation on Pacific Time.
#
# According to DOT official Joanne Petrie, Indian reservations are not
# bound to follow time zones imposed by neighboring jurisdictions.
#
# (The last is consistent with how the database now handles the Navajo
# Nation.)

# From Arthur David Olson (2011-02-09):
# I just spoke by phone with a staff member at the Metlakatla Indian
# Community office (using contact information available at
# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla
# It's shortly after 1:00 here on the east coast of the United States;
# the staffer said it was shortly after 10:00 there. When I asked whether
# that meant they were on Pacific time, they said no - they were on their
# own time. I asked about daylight saving; they said it wasn't used. I
# did not inquire about practices in the past.

# From Arthur David Olson (2011-08-17):
# For lack of better information, assume that Metlakatla's
# abandonment of use of daylight saving resulted from the 1983 vote.

# From Steffen Thorsen (2015-11-09):
# It seems Metlakatla did go off PST on Sunday, November 1, changing
# their time to AKST and are going to follow Alaska's DST, switching
# between AKST and AKDT from now on....
# https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/

# From Ryan Stanley (2018-11-06):
# The Metlakatla community in Alaska has decided not to change its
# clock back an hour starting on November 4th, 2018 (day before yesterday).
# They will be gmtoff=-28800 year-round.
# https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/

# From Paul Eggert (2018-12-16):
# In a 2018-12-11 special election, Metlakatla voted to go back to
# Alaska time (including daylight saving time) starting next year.
# https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/
#
# From Ryan Stanley (2019-01-11):
# The community will be changing back on the 20th of this month...
# From Tim Parenti (2019-01-11):
# Per an announcement on the Metlakatla community's official Facebook page, the
# "fall back" will be on Sunday 2019-01-20 at 02:00:
# https://www.facebook.com/141055983004923/photos/607150969728753/
# So they won't be waiting for Alaska to join them on 2019-03-10, but will
# rather change their clocks twice in seven weeks.

# From Paul Eggert (2023-01-23):
# America/Adak is for the Aleutian Islands that are part of Alaska
# and are west of 169.5° W.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Juneau	 15:02:19 -	LMT	1867 Oct 19 15:33:32
			 -8:57:41 -	LMT	1900 Aug 20 12:00
			 -8:00	-	PST	1942
			 -8:00	US	P%sT	1946
			 -8:00	-	PST	1969
			 -8:00	US	P%sT	1980 Apr 27  2:00
			 -9:00	US	Y%sT	1980 Oct 26  2:00
			 -8:00	US	P%sT	1983 Oct 30  2:00
			 -9:00	US	Y%sT	1983 Nov 30
			 -9:00	US	AK%sT
Zone America/Sitka	 14:58:47 -	LMT	1867 Oct 19 15:30
			 -9:01:13 -	LMT	1900 Aug 20 12:00
			 -8:00	-	PST	1942
			 -8:00	US	P%sT	1946
			 -8:00	-	PST	1969
			 -8:00	US	P%sT	1983 Oct 30  2:00
			 -9:00	US	Y%sT	1983 Nov 30
			 -9:00	US	AK%sT
Zone America/Metlakatla	 15:13:42 -	LMT	1867 Oct 19 15:44:55
			 -8:46:18 -	LMT	1900 Aug 20 12:00
			 -8:00	-	PST	1942
			 -8:00	US	P%sT	1946
			 -8:00	-	PST	1969
			 -8:00	US	P%sT	1983 Oct 30  2:00
			 -8:00	-	PST	2015 Nov  1  2:00
			 -9:00	US	AK%sT	2018 Nov  4  2:00
			 -8:00	-	PST	2019 Jan 20  2:00
			 -9:00	US	AK%sT
Zone America/Yakutat	 14:41:05 -	LMT	1867 Oct 19 15:12:18
			 -9:18:55 -	LMT	1900 Aug 20 12:00
			 -9:00	-	YST	1942
			 -9:00	US	Y%sT	1946
			 -9:00	-	YST	1969
			 -9:00	US	Y%sT	1983 Nov 30
			 -9:00	US	AK%sT
Zone America/Anchorage	 14:00:24 -	LMT	1867 Oct 19 14:31:37
			 -9:59:36 -	LMT	1900 Aug 20 12:00
			-10:00	-	AST	1942
			-10:00	US	A%sT	1967 Apr
			-10:00	-	AHST	1969
			-10:00	US	AH%sT	1983 Oct 30  2:00
			 -9:00	US	Y%sT	1983 Nov 30
			 -9:00	US	AK%sT
Zone America/Nome	 12:58:22 -	LMT	1867 Oct 19 13:29:35
			-11:01:38 -	LMT	1900 Aug 20 12:00
			-11:00	-	NST	1942
			-11:00	US	N%sT	1946
			-11:00	-	NST	1967 Apr
			-11:00	-	BST	1969
			-11:00	US	B%sT	1983 Oct 30  2:00
			 -9:00	US	Y%sT	1983 Nov 30
			 -9:00	US	AK%sT
Zone America/Adak	 12:13:22 -	LMT	1867 Oct 19 12:44:35
			-11:46:38 -	LMT	1900 Aug 20 12:00
			-11:00	-	NST	1942
			-11:00	US	N%sT	1946
			-11:00	-	NST	1967 Apr
			-11:00	-	BST	1969
			-11:00	US	B%sT	1983 Oct 30  2:00
			-10:00	US	AH%sT	1983 Nov 30
			-10:00	US	H%sT
# The following switches don't make our 1970 cutoff.
#
# Kiska observed Tokyo date and time during Japanese occupation from
# 1942-06-06 to 1943-07-29, and similarly for Attu from 1942-06-07 to
# 1943-05-29 (all dates American).  Both islands are now uninhabited.
#
# Shanks writes that part of southwest Alaska (e.g. Aniak)
# switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
# and another part (e.g. Akiak) made the same switch five weeks later.
#
# From David Flater (2004-11-09):
# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
# Historic Preservation Commission, provided this information, which
# suggests that Unalaska deviated from statutory time from early 1967
# possibly until 1983:
#
#  Minutes of the Unalaska City Council Meeting, January 10, 1967:
#  "Except for St. Paul and Akutan, Unalaska is the only important
#  location not on Alaska Standard Time.  The following resolution was
#  made by William Robinson and seconded by Henry Swanson: Be it
#  resolved that the City of Unalaska hereby goes to Alaska Standard
#  Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
#  January 14, Alaska Standard Time.)  This resolution was passed with
#  three votes for and one against."

# Hawaii

# From Arthur David Olson (2010-12-09):
# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225
# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,
# the article is available at
# https://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf
# and indicates that standard time was adopted effective noon, January
# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight
# saving for the period between the last Sunday of each April and the
# last Sunday of each September, but less than a month later repealed the
# act," (page 220), that year-round daylight saving time was in effect
# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for
# when clocks changed) and that clocks were changed by 30 minutes
# effective the second Sunday of June, 1947 (page 219, with no time of
# day given for when clocks changed). A footnote for the 1933 changes
# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933)
# and Act 163 (approved 21 May 1933)."

# From Arthur David Olson (2011-01-19):
# The following is from "Laws of the Territory of Hawaii Passed by the
# Seventeenth Legislature: Regular Session 1933," available (as of
# 2011-01-19) at American University's Pence Law Library. Page 85: "Act
# 90...At 2 o'clock ante meridian of the last Sunday in April of each
# year, the standard time of this Territory shall be advanced one
# hour...This Act shall take effect upon its approval. Approved this 26th
# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of
# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is
# hereby repealed...This Act shall take effect upon its approval, upon
# which date the standard time of this Territory shall be restored to
# that existing immediately prior to the taking effect of said Act 90.
# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor
# of the Territory of Hawaii."
#
# Note that 1933-05-21 was a Sunday.
# We're left to guess the time of day when Act 163 was approved; guess noon.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Pacific/Honolulu	-10:31:26 -	LMT	1896 Jan 13 12:00
			-10:30	-	HST	1933 Apr 30  2:00
			-10:30	1:00	HDT	1933 May 21 12:00
			-10:30	US	H%sT	1947 Jun  8  2:00
			-10:00	-	HST

# Now we turn to US areas that have diverged from the consensus since 1970.

# Arizona mostly uses MST.

# From Paul Eggert (2002-10-20):
#
# The information in the rest of this paragraph is derived from the
# Daylight Saving Time web page
# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23)
# maintained by the Arizona State Library, Archives and Public Records.
# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
# time, but by federal law railroads, airlines, bus lines, military
# personnel, and some engaged in interstate commerce continued to
# observe war (i.e., daylight saving) time.  The 1944-03-17 Phoenix
# Gazette says that was the date the law changed, and that 04-01 was
# the date the state's clocks would change.  In 1945 the State of
# Arizona used standard time all year, again with exceptions only as
# mandated by federal law.  Arizona observed DST in 1967, but Arizona
# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
#
# Shanks says the 1944 experiment came to an end on 1944-03-17.
# Go with the Arizona State Library instead.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Phoenix	-7:28:18 -	LMT	1883 Nov 18 19:00u
			-7:00	US	M%sT	1944 Jan  1  0:01
			-7:00	-	MST	1944 Apr  1  0:01
			-7:00	US	M%sT	1944 Oct  1  0:01
			-7:00	-	MST	1967
			-7:00	US	M%sT	1968 Mar 21
			-7:00	-	MST

# From Arthur David Olson (1988-02-13):
# A writer from the Inter Tribal Council of Arizona, Inc.,
# notes in private correspondence dated 1987-12-28 that "Presently, only the
# Navajo Nation participates in the Daylight Saving Time policy, due to its
# large size and location in three states."  (The "only" means that other
# tribal nations don't use DST.)
#
# From Paul Eggert (2013-08-26):
# See America/Denver for a zone appropriate for the Navajo Nation.

# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
# Teton, Twin Falls, Valley, Washington counties, and the southern
# quarter of Idaho county) and eastern Oregon (most of Malheur County)
# switched four weeks late in 1974.
#
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Boise	-7:44:49 -	LMT	1883 Nov 18 20:00u
			-8:00	US	P%sT	1923 May 13  2:00
			-7:00	US	M%sT	1974
			-7:00	-	MST	1974 Feb  3  2:00
			-7:00	US	M%sT

# Indiana
#
# For a map of Indiana's time zone regions, see:
# https://en.wikipedia.org/wiki/Time_in_Indiana
#
# From Paul Eggert (2018-11-30):
# A brief but entertaining history of time in Indiana describes a 1949 debate
# in the Indiana House where city legislators (who favored "fast time")
# tussled with farm legislators (who didn't) over a bill to outlaw DST:
#  "Lacking enough votes, the city faction tries to filibuster until time runs
#   out on the session at midnight, but rural champion Rep. Herbert Copeland,
#   R-Madison, leans over the gallery railing and forces the official clock
#   back to 9 p.m., breaking it in the process.  The clock sticks on 9 as the
#   debate rages on into the night.  The filibuster finally dies out and the
#   bill passes, while outside the chamber, clocks read 3:30 a.m.  In the end,
#   it doesn't matter which side won.  The law has no enforcement powers and
#   is simply ignored by fast-time communities."
# How Indiana went from 'God's time' to split zones and daylight-saving.
# Indianapolis Star. 2018-11-27 14:58 -05.
# https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/
#
# From Paul Eggert (2007-08-17):
# Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
# with the following exceptions:
#
# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
#   Vanderburgh, and Warrick counties have been like America/Chicago.
#
# - Dearborn and Ohio counties have been like America/New_York.
#
# - Clark, Floyd, and Harrison counties have been like
#   America/Kentucky/Louisville.
#
# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
#   and Switzerland counties have their own time zone histories as noted below.
#
# Shanks partitioned Indiana into 345 regions, each with its own time history,
# and wrote "Even newspaper reports present contradictory information."
# Those Hoosiers!  Such a flighty and changeable people!
# Fortunately, most of the complexity occurred before our cutoff date of 1970.
#
# Other than Indianapolis, the Indiana place names are so nondescript
# that they would be ambiguous if we left them at the 'America' level.
# So we reluctantly put them all in a subdirectory 'America/Indiana'.

# From Paul Eggert (2014-06-26):
# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana
# says "DOT is relocating the time zone boundary in Indiana to move Starke,
# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
# Eastern Time Zone to the Central Time Zone.... The effective date of
# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the
# changeover date from standard time to Daylight Saving Time."
# Strictly speaking, this meant the affected counties changed their
# clocks twice that night, but this obviously was in error.  The intent
# was that 01:59:59 EST be followed by 02:00:00 CDT.

# From Gwillim Law (2007-02-10):
# The Associated Press has been reporting that Pulaski County, Indiana is
# going to switch from Central to Eastern Time on March 11, 2007....
# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
Rule Indianapolis 1941	only	-	Jun	22	2:00	1:00	D
Rule Indianapolis 1941	1954	-	Sep	lastSun	2:00	0	S
Rule Indianapolis 1946	1954	-	Apr	lastSun	2:00	1:00	D
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 18:00u
			-6:00	US	C%sT	1920
			-6:00 Indianapolis C%sT	1942
			-6:00	US	C%sT	1946
			-6:00 Indianapolis C%sT	1955 Apr 24  2:00
			-5:00	-	EST	1957 Sep 29  2:00
			-6:00	-	CST	1958 Apr 27  2:00
			-5:00	-	EST	1969
			-5:00	US	E%sT	1971
			-5:00	-	EST	2006
			-5:00	US	E%sT
#
# Eastern Crawford County, Indiana, left its clocks alone in 1974,
# as well as from 1976 through 2005.
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
Rule	Marengo	1951	only	-	Apr	lastSun	2:00	1:00	D
Rule	Marengo	1951	only	-	Sep	lastSun	2:00	0	S
Rule	Marengo	1954	1960	-	Apr	lastSun	2:00	1:00	D
Rule	Marengo	1954	1960	-	Sep	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Marengo -5:45:23 -	LMT	1883 Nov 18 18:00u
			-6:00	US	C%sT	1951
			-6:00	Marengo	C%sT	1961 Apr 30  2:00
			-5:00	-	EST	1969
			-5:00	US	E%sT	1974 Jan  6  2:00
			-6:00	1:00	CDT	1974 Oct 27  2:00
			-5:00	US	E%sT	1976
			-5:00	-	EST	2006
			-5:00	US	E%sT
#
# Daviess, Dubois, Knox, and Martin Counties, Indiana,
# switched from eastern to central time in April 2006, then switched back
# in November 2007.
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
Rule Vincennes	1946	only	-	Apr	lastSun	2:00	1:00	D
Rule Vincennes	1946	only	-	Sep	lastSun	2:00	0	S
Rule Vincennes	1953	1954	-	Apr	lastSun	2:00	1:00	D
Rule Vincennes	1953	1959	-	Sep	lastSun	2:00	0	S
Rule Vincennes	1955	only	-	May	 1	0:00	1:00	D
Rule Vincennes	1956	1963	-	Apr	lastSun	2:00	1:00	D
Rule Vincennes	1960	only	-	Oct	lastSun	2:00	0	S
Rule Vincennes	1961	only	-	Sep	lastSun	2:00	0	S
Rule Vincennes	1962	1963	-	Oct	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Vincennes -5:50:07 - LMT	1883 Nov 18 18:00u
			-6:00	US	C%sT	1946
			-6:00 Vincennes	C%sT	1964 Apr 26  2:00
			-5:00	-	EST	1969
			-5:00	US	E%sT	1971
			-5:00	-	EST	2006 Apr  2  2:00
			-6:00	US	C%sT	2007 Nov  4  2:00
			-5:00	US	E%sT
#
# Perry County, Indiana, switched from eastern to central time in April 2006.
# From Alois Treindl (2019-07-09):
# The Indianapolis News, Friday 27 October 1967 states that Perry County
# returned to CST.  It went again to EST on 27 April 1969, as documented by the
# Indianapolis star of Saturday 26 April.
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
Rule Perry	1955	only	-	May	 1	0:00	1:00	D
Rule Perry	1955	1960	-	Sep	lastSun	2:00	0	S
Rule Perry	1956	1963	-	Apr	lastSun	2:00	1:00	D
Rule Perry	1961	1963	-	Oct	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Tell_City -5:47:03 - LMT	1883 Nov 18 18:00u
			-6:00	US	C%sT	1946
			-6:00 Perry	C%sT	1964 Apr 26  2:00
			-5:00	-	EST	1967 Oct 29  2:00
			-6:00	US	C%sT	1969 Apr 27  2:00
			-5:00	US	E%sT	1971
			-5:00	-	EST	2006 Apr  2  2:00
			-6:00	US	C%sT
#
# Pike County, Indiana moved from central to eastern time in 1977,
# then switched back in 2006, then switched back again in 2007.
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
Rule	Pike	1955	only	-	May	 1	0:00	1:00	D
Rule	Pike	1955	1960	-	Sep	lastSun	2:00	0	S
Rule	Pike	1956	1964	-	Apr	lastSun	2:00	1:00	D
Rule	Pike	1961	1964	-	Oct	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Petersburg -5:49:07 - LMT	1883 Nov 18 18:00u
			-6:00	US	C%sT	1955
			-6:00	Pike	C%sT	1965 Apr 25  2:00
			-5:00	-	EST	1966 Oct 30  2:00
			-6:00	US	C%sT	1977 Oct 30  2:00
			-5:00	-	EST	2006 Apr  2  2:00
			-6:00	US	C%sT	2007 Nov  4  2:00
			-5:00	US	E%sT
#
# Starke County, Indiana moved from central to eastern time in 1991,
# then switched back in 2006.
# From Arthur David Olson (1991-10-28):
# An article on page A3 of the Sunday, 1991-10-27 Washington Post
# notes that Starke County switched from Central time to Eastern time as of
# 1991-10-27.
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
Rule	Starke	1947	1961	-	Apr	lastSun	2:00	1:00	D
Rule	Starke	1947	1954	-	Sep	lastSun	2:00	0	S
Rule	Starke	1955	1956	-	Oct	lastSun	2:00	0	S
Rule	Starke	1957	1958	-	Sep	lastSun	2:00	0	S
Rule	Starke	1959	1961	-	Oct	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Knox -5:46:30 -	LMT	1883 Nov 18 18:00u
			-6:00	US	C%sT	1947
			-6:00	Starke	C%sT	1962 Apr 29  2:00
			-5:00	-	EST	1963 Oct 27  2:00
			-6:00	US	C%sT	1991 Oct 27  2:00
			-5:00	-	EST	2006 Apr  2  2:00
			-6:00	US	C%sT
#
# Pulaski County, Indiana, switched from eastern to central time in
# April 2006 and then switched back in March 2007.
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
Rule	Pulaski	1946	1960	-	Apr	lastSun	2:00	1:00	D
Rule	Pulaski	1946	1954	-	Sep	lastSun	2:00	0	S
Rule	Pulaski	1955	1956	-	Oct	lastSun	2:00	0	S
Rule	Pulaski	1957	1960	-	Sep	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Winamac -5:46:25 - LMT	1883 Nov 18 18:00u
			-6:00	US	C%sT	1946
			-6:00	Pulaski	C%sT	1961 Apr 30  2:00
			-5:00	-	EST	1969
			-5:00	US	E%sT	1971
			-5:00	-	EST	2006 Apr  2  2:00
			-6:00	US	C%sT	2007 Mar 11  2:00
			-5:00	US	E%sT
#
# Switzerland County, Indiana, did not observe DST from 1973 through 2005.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Vevay -5:40:16 -	LMT	1883 Nov 18 18:00u
			-6:00	US	C%sT	1954 Apr 25  2:00
			-5:00	-	EST	1969
			-5:00	US	E%sT	1973
			-5:00	-	EST	2006
			-5:00	US	E%sT

# From Paul Eggert (2018-03-20):
# The Louisville & Nashville Railroad's 1883-11-18 change occurred at
# 10:00 old local time; train were supposed to come to a standstill
# for precisely 18 minutes.  See Bartky Fig. 1 (page 50).  It is not
# clear how this matched civil time in Louisville, so for now continue
# to assume Louisville switched at noon new local time, like New York.
#
# From Michael Deckers (2019-08-06):
# From the contemporary source given by Alois Treindl,
# the switch in Louisville on 1946-04-28 was on 00:01
# From Paul Eggert (2019-08-26):
# That source was the Louisville Courier-Journal, 1946-04-27, p 4.
# Shanks gives 02:00 for all 20th-century transition times in Louisville.
# Evidently this is wrong for spring 1946.  Although also likely wrong
# for other dates, we have no data.
#
# Part of Kentucky left its clocks alone in 1974.
# This also includes Clark, Floyd, and Harrison counties in Indiana.
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
Rule Louisville	1921	only	-	May	1	2:00	1:00	D
Rule Louisville	1921	only	-	Sep	1	2:00	0	S
Rule Louisville	1941	only	-	Apr	lastSun	2:00	1:00	D
Rule Louisville	1941	only	-	Sep	lastSun	2:00	0	S
Rule Louisville	1946	only	-	Apr	lastSun	0:01	1:00	D
Rule Louisville	1946	only	-	Jun	2	2:00	0	S
Rule Louisville	1950	1961	-	Apr	lastSun	2:00	1:00	D
Rule Louisville	1950	1955	-	Sep	lastSun	2:00	0	S
Rule Louisville	1956	1961	-	Oct	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Kentucky/Louisville -5:43:02 - LMT	1883 Nov 18 18:00u
			-6:00	US	C%sT	1921
			-6:00 Louisville C%sT	1942
			-6:00	US	C%sT	1946
			-6:00 Louisville C%sT	1961 Jul 23  2:00
			-5:00	-	EST	1968
			-5:00	US	E%sT	1974 Jan  6  2:00
			-6:00	1:00	CDT	1974 Oct 27  2:00
			-5:00	US	E%sT
#
# Wayne County, Kentucky
#
# From Lake Cumberland LIFE
# http://www.lake-cumberland.com/life/archive/news990129time.shtml
# (1999-01-29) via WKYM-101.7:
# Clinton County has joined Wayne County in asking the DoT to change from
# the Central to the Eastern time zone....  The Wayne County government made
# the same request in December.  And while Russell County officials have not
# taken action, the majority of respondents to a poll conducted there in
# August indicated they would like to change to "fast time" also.
# The three Lake Cumberland counties are the farthest east of any U.S.
# location in the Central time zone.
#
# From Rich Wales (2000-08-29):
# After prolonged debate, and despite continuing deep differences of opinion,
# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
# (-0500) time.  They won't "fall back" this year.  See Sara Shipley,
# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
#
# From Paul Eggert (2001-07-16):
# The final rule was published in the
# Federal Register 65, 160 (2000-08-17), pp 50154-50158.
# https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm
#
Zone America/Kentucky/Monticello -5:39:24 - LMT	1883 Nov 18 18:00u
			-6:00	US	C%sT	1946
			-6:00	-	CST	1968
			-6:00	US	C%sT	2000 Oct 29  2:00
			-5:00	US	E%sT


# From Rives McDow (2000-08-30):
# Here ... are all the changes in the US since 1985.
# Kearny County, KS (put all of county on central;
#	previously split between MST and CST) ... 1990-10
# Starke County, IN (from CST to EST) ... 1991-10
# Oliver County, ND (from MST to CST) ... 1992-10
# West Wendover, NV (from PST TO MST) ... 1999-10
# Wayne County, KY (from CST to EST) ... 2000-10
#
# From Paul Eggert (2001-07-17):
# We don't know where the line used to be within Kearny County, KS,
# so omit that change for now.
# See America/Indiana/Knox for the Starke County, IN change.
# See America/North_Dakota/Center for the Oliver County, ND change.
# West Wendover, NV officially switched from Pacific to mountain time on
# 1999-10-31.  See the
# Federal Register 64, 203 (1999-10-21), pp 56705-56707.
# https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm
# However, the Federal Register says that West Wendover already operated
# on mountain time, and the rule merely made this official;
# hence a separate tz entry is not needed.

# Michigan
#
# From Bob Devine (1988-01-28):
# Michigan didn't observe DST from 1968 to 1973.
#
# From Paul Eggert (1999-03-31):
# Shanks writes that Michigan started using standard time on 1885-09-18,
# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
# that Detroit kept
#
#	local time until 1900 when the City Council decreed that clocks should
#	be put back twenty-eight minutes to Central Standard Time.  Half the
#	city obeyed, half refused.  After considerable debate, the decision
#	was rescinded and the city reverted to Sun time.  A derisive offer to
#	erect a sundial in front of the city hall was referred to the
#	Committee on Sewers.  Then, in 1905, Central time was adopted
#	by city vote.
#
# This story is too entertaining to be false, so go with Howse over Shanks.
#
# From Paul Eggert (2001-03-06):
# Garland (1927) writes "Cleveland and Detroit advanced their clocks
# one hour in 1914."  This change is not in Shanks.  We have no more
# info, so omit this for now.
#
# From Paul Eggert (2019-07-06):
# Due to a complicated set of legal maneuvers, in 1967 Michigan did
# not start daylight saving time when the rest of the US did.
# Instead, it began DST on Jun 14 at 00:01.  This was big news:
# the Detroit Free Press reported it at the top of Page 1 on
# 1967-06-14, in an article "State Adjusting to Switch to Fast Time"
# by Gary Blonston, above an article about Thurgood Marshall's
# confirmation to the US Supreme Court.  Although Shanks says Detroit
# observed DST until 1967-10-29 00:01, that time of day seems to be
# incorrect, as the Free Press later said DST ended in Michigan at the
# same time as the rest of the US.  Also, although Shanks reports no DST in
# Detroit in 1968, it did observe DST that year; in the November 1968
# election Michigan voters narrowly repealed DST, effective 1969.
#
# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
Rule	Detroit	1948	only	-	Apr	lastSun	2:00	1:00	D
Rule	Detroit	1948	only	-	Sep	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Detroit	-5:32:11 -	LMT	1905
			-6:00	-	CST	1915 May 15  2:00
			-5:00	-	EST	1942
			-5:00	US	E%sT	1946
			-5:00	Detroit	E%sT	1967 Jun 14  0:01
			-5:00	US	E%sT	1969
			-5:00	-	EST	1973
			-5:00	US	E%sT	1975
			-5:00	-	EST	1975 Apr 27  2:00
			-5:00	US	E%sT
#
# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
# switched from EST to CST/CDT in 1973.
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
Rule Menominee	1946	only	-	Apr	lastSun	2:00	1:00	D
Rule Menominee	1946	only	-	Sep	lastSun	2:00	0	S
Rule Menominee	1966	only	-	Apr	lastSun	2:00	1:00	D
Rule Menominee	1966	only	-	Oct	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Menominee	-5:50:27 -	LMT	1885 Sep 18 12:00
			-6:00	US	C%sT	1946
			-6:00 Menominee	C%sT	1969 Apr 27  2:00
			-5:00	-	EST	1973 Apr 29  2:00
			-6:00	US	C%sT

# Navassa
# administered by the US Fish and Wildlife Service
# claimed by US under the provisions of the 1856 Guano Islands Act
# also claimed by Haiti
# occupied 1857/1900 by the Navassa Phosphate Co
# US lighthouse 1917/1996-09
# currently uninhabited
# see Mark Fineman, "An Isle Rich in Guano and Discord",
# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
# Jimmy Skaggs, _The Great Guano Rush_ (1994).

################################################################################


# From Paul Eggert (2017-02-10):
#
# Unless otherwise specified, the source for data through 1990 is:
# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
# San Diego: ACS Publications, Inc. (2003).
# Unfortunately this book contains many errors and cites no sources.
#
# Many years ago Gwillim Law wrote that a good source
# for time zone data was the International Air Transport
# Association's Standard Schedules Information Manual (IATA SSIM),
# published semiannually.  Law sent in several helpful summaries
# of the IATA's data after 1990.  Except where otherwise noted,
# IATA SSIM is the source for entries after 1990.
#
# Other sources occasionally used include:
#
#	Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
#	<https://www.jstor.org/stable/1774359>.
#
#	Pearce C. The Great Daylight Saving Time Controversy.
#	Australian Ebook Publisher. 2017. ISBN 978-1-925516-96-8.
#
#	Edward W. Whitman, World Time Differences,
#	Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
#	which I found in the UCLA library.
#
#	William Willett, The Waste of Daylight, 19th edition
#	<http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
#	[PDF] (1914-03)
#
# For the 1911/1912 establishment of standard time in French possessions, see:
# Société Française de Physique, Recueil de constantes physiques (1913),
# page 752, 18b.
#
# See the 'europe' file for Greenland.

# Canada

# From Alain LaBonté (1994-11-14):
# I post here the time zone abbreviations standardized in Canada
# for both English and French in the CAN/CSA-Z234.4-89 standard....
#
#	UTC	Standard time	Daylight saving time
#	offset	French	English	French	English
#	-2:30	-	-	HAT	NDT
#	-3	-	-	HAA	ADT
#	-3:30	HNT	NST	-	-
#	-4	HNA	AST	HAE	EDT
#	-5	HNE	EST	HAC	CDT
#	-6	HNC	CST	HAR	MDT
#	-7	HNR	MST	HAP	PDT
#	-8	HNP	PST	HAY	YDT
#	-9	HNY	YST	-	-
#
#	HN: Heure Normale	ST: Standard Time
#	HA: Heure Avancée	DT: Daylight saving Time
#
#	A: de l'Atlantique	Atlantic
#	C: du Centre		Central
#	E: de l'Est		Eastern
#	M:			Mountain
#	N:			Newfoundland
#	P: du Pacifique		Pacific
#	R: des Rocheuses
#	T: de Terre-Neuve
#	Y: du Yukon		Yukon
#
# From Paul Eggert (1994-11-22):
# Alas, this sort of thing must be handled by localization software.

# Unless otherwise specified, the data entries for Canada are all from Shanks
# & Pottenger.

# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
# 2007-03-01):
# The British Columbia government announced yesterday that it will
# adjust daylight savings next year to align with changes in the
# U.S. and the rest of Canada....
# https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm
# ...
# Nova Scotia
# Daylight saving time will be extended by four weeks starting in 2007....
# https://www.novascotia.ca/just/regulations/rg2/2006/ma1206.pdf
#
# [For New Brunswick] the new legislation dictates that the time change is to
# be done at 02:00 instead of 00:01.
# https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
# ...
# Manitoba has traditionally changed the clock every fall at 03:00.
# As of 2006, the transition is to take place one hour earlier at 02:00.
# https://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
# ...
# [Alberta, Ontario, Quebec] will follow US rules.
# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
# ...
# P.E.I. will follow US rules....
# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
# ...
# Province of Newfoundland and Labrador....
# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
# ...
# Yukon
# https://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
# ...
# N.W.T. will follow US rules.  Whoever maintains the government web site
# does not seem to believe in bookmarks.  To see the news release, click the
# following link and search for "Daylight Savings Time Change".  Press the
# "Daylight Savings Time Change" link; it will fire off a popup using
# JavaScript.
# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
# ...
# Nunavut
# An amendment to the Interpretation Act was registered on February 19/2007....
# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf

# From Paul Eggert (2014-10-18):
# H. David Matthews and Mary Vincent's map
# "It's about TIME", _Canadian Geographic_ (September-October 1998)
# https://web.archive.org/web/19990827055050/https://canadiangeographic.ca/SO98/geomap.htm
# contains detailed boundaries for regions observing nonstandard
# time and daylight saving time arrangements in Canada circa 1998.
#
# National Research Council Canada maintains info about time zones and DST.
# https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html
# https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5
# Its unofficial information is often taken from Matthews and Vincent.

# From Paul Eggert (2006-06-27):
# For now, assume all of DST-observing Canada will fall into line with the
# new US DST rules,

# From Chris Walton (2011-12-01)
# In the first of Tammy Hardwick's articles
# http://www.ilovecreston.com/?p=articles&t=spec&ar=260
# she quotes the Friday November 1/1918 edition of the Creston Review.
# The quote includes these two statements:
# 'Sunday the CPR went back to the old system of time...'
# '... The daylight saving scheme was dropped all over Canada at the same time,'
# These statements refer to a transition from daylight time to standard time
# that occurred nationally on Sunday October 27/1918.  This transition was
# also documented in the Saturday October 26/1918 edition of the Toronto Star.

# In light of that evidence, we alter the date from the earlier believed
# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day
# than Thursday) in all Canadian rulesets.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Canada	1918	only	-	Apr	14	2:00	1:00	D
Rule	Canada	1918	only	-	Oct	27	2:00	0	S
Rule	Canada	1942	only	-	Feb	 9	2:00	1:00	W # War
Rule	Canada	1945	only	-	Aug	14	23:00u	1:00	P # Peace
Rule	Canada	1945	only	-	Sep	30	2:00	0	S
Rule	Canada	1974	1986	-	Apr	lastSun	2:00	1:00	D
Rule	Canada	1974	2006	-	Oct	lastSun	2:00	0	S
Rule	Canada	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
Rule	Canada	2007	max	-	Mar	Sun>=8	2:00	1:00	D
Rule	Canada	2007	max	-	Nov	Sun>=1	2:00	0	S


# Newfoundland and Labrador

# From Paul Eggert (2017-10-14):
# Legally Labrador should observe Newfoundland time; see:
# McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07
# http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/
# Matthews and Vincent (1998) write that the only part of Labrador
# that follows the rules is the southeast corner, including Port Hope
# Simpson and Mary's Harbour, but excluding, say, Black Tickle.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	StJohns	1917	only	-	Apr	 8	2:00	1:00	D
Rule	StJohns	1917	only	-	Sep	17	2:00	0	S
# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
Rule	StJohns	1919	only	-	May	 5	23:00	1:00	D
Rule	StJohns	1919	only	-	Aug	12	23:00	0	S
# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
Rule	StJohns	1920	1935	-	May	Sun>=1	23:00	1:00	D
Rule	StJohns	1920	1935	-	Oct	lastSun	23:00	0	S
# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
# Pottenger.
Rule	StJohns	1936	1941	-	May	Mon>=9	0:00	1:00	D
Rule	StJohns	1936	1941	-	Oct	Mon>=2	0:00	0	S
# Whitman gives the following transitions:
# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
# but go with Shanks & Pottenger and assume they used Canadian rules.
# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
# Apr 30 - Sep 24; go with Shanks & Pottenger.
Rule	StJohns	1946	1950	-	May	Sun>=8	2:00	1:00	D
Rule	StJohns	1946	1950	-	Oct	Sun>=2	2:00	0	S
Rule	StJohns	1951	1986	-	Apr	lastSun	2:00	1:00	D
Rule	StJohns	1951	1959	-	Sep	lastSun	2:00	0	S
Rule	StJohns	1960	1986	-	Oct	lastSun	2:00	0	S
# From Paul Eggert (2000-10-02):
# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
# at 00:01 local time.  For now, assume it started in 1987.

# From Michael Pelley (2011-09-12):
# We received today, Monday, September 12, 2011, notification that the
# changes to the Newfoundland Standard Time Act have been proclaimed.
# The change in the Act stipulates that the change from Daylight Savings
# Time to Standard Time and from Standard Time to Daylight Savings Time
# now occurs at 2:00AM.
# ...
# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm
# ...
# MICHAEL PELLEY  |  Manager of Enterprise Architecture - Solution Delivery
# Office of the Chief Information Officer
# Executive Council
# Government of Newfoundland & Labrador

Rule	StJohns	1987	only	-	Apr	Sun>=1	0:01	1:00	D
Rule	StJohns	1987	2006	-	Oct	lastSun	0:01	0	S
Rule	StJohns	1988	only	-	Apr	Sun>=1	0:01	2:00	DD
Rule	StJohns	1989	2006	-	Apr	Sun>=1	0:01	1:00	D
Rule	StJohns	2007	2011	-	Mar	Sun>=8	0:01	1:00	D
Rule	StJohns	2007	2010	-	Nov	Sun>=1	0:01	0	S
#
# St John's has an apostrophe, but POSIX file names can't have apostrophes.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/St_Johns	-3:30:52 -	LMT	1884
			-3:30:52 StJohns N%sT	1918
			-3:30:52 Canada	N%sT	1919
			-3:30:52 StJohns N%sT	1935 Mar 30
			-3:30	StJohns	N%sT	1942 May 11
			-3:30	Canada	N%sT	1946
			-3:30	StJohns	N%sT	2011 Nov
			-3:30	Canada	N%sT

# most of east Labrador

# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Goose_Bay	-4:01:40 -	LMT	1884 # Happy Valley-Goose Bay
			-3:30:52 -	NST	1918
			-3:30:52 Canada N%sT	1919
			-3:30:52 -	NST	1935 Mar 30
			-3:30	-	NST	1936
			-3:30	StJohns	N%sT	1942 May 11
			-3:30	Canada	N%sT	1946
			-3:30	StJohns	N%sT	1966 Mar 15  2:00
			-4:00	StJohns	A%sT	2011 Nov
			-4:00	Canada	A%sT


# west Labrador, Nova Scotia, Prince Edward I,
# Îles-de-la-Madeleine, Listuguj reserve

# From Brian Inglis (2015-07-20):
# From the historical weather station records available at:
# https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
# Sydney shares the same time history as Glace Bay, so was
# likely to be the same across the island....
# Sydney, as the capital and most populous location, or Cape Breton, would
# have been better names for the zone had we known this in 1996.

# From Paul Eggert (2015-07-20):
# Shanks & Pottenger write that since 1970 most of this region has been like
# Halifax.  Many locales did not observe peacetime DST until 1972;
# the Cape Breton area, represented by Glace Bay, is the largest we know of
# (Glace Bay was perhaps not the best name choice but no point changing now).
# Shanks & Pottenger also write that Liverpool, NS was the only town
# in Canada to observe DST in 1971 but not 1970; for now we'll assume
# this is a typo.

# From Jeffery Nichols (2020-01-09):
# America/Halifax ... also applies to Îles-de-la-Madeleine and the Listuguj
# reserve in Quebec. Officially, this came into effect on January 1, 2007
# (Legal Time Act, CQLR c T-5.1), but the legislative debates surrounding that
# bill say that it is "accommodating the customs and practices" of those
# regions, which suggests that they have always been in-line with Halifax.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Halifax	1916	only	-	Apr	 1	0:00	1:00	D
Rule	Halifax	1916	only	-	Oct	 1	0:00	0	S
Rule	Halifax	1920	only	-	May	 9	0:00	1:00	D
Rule	Halifax	1920	only	-	Aug	29	0:00	0	S
Rule	Halifax	1921	only	-	May	 6	0:00	1:00	D
Rule	Halifax	1921	1922	-	Sep	 5	0:00	0	S
Rule	Halifax	1922	only	-	Apr	30	0:00	1:00	D
Rule	Halifax	1923	1925	-	May	Sun>=1	0:00	1:00	D
Rule	Halifax	1923	only	-	Sep	 4	0:00	0	S
Rule	Halifax	1924	only	-	Sep	15	0:00	0	S
Rule	Halifax	1925	only	-	Sep	28	0:00	0	S
Rule	Halifax	1926	only	-	May	16	0:00	1:00	D
Rule	Halifax	1926	only	-	Sep	13	0:00	0	S
Rule	Halifax	1927	only	-	May	 1	0:00	1:00	D
Rule	Halifax	1927	only	-	Sep	26	0:00	0	S
Rule	Halifax	1928	1931	-	May	Sun>=8	0:00	1:00	D
Rule	Halifax	1928	only	-	Sep	 9	0:00	0	S
Rule	Halifax	1929	only	-	Sep	 3	0:00	0	S
Rule	Halifax	1930	only	-	Sep	15	0:00	0	S
Rule	Halifax	1931	1932	-	Sep	Mon>=24	0:00	0	S
Rule	Halifax	1932	only	-	May	 1	0:00	1:00	D
Rule	Halifax	1933	only	-	Apr	30	0:00	1:00	D
Rule	Halifax	1933	only	-	Oct	 2	0:00	0	S
Rule	Halifax	1934	only	-	May	20	0:00	1:00	D
Rule	Halifax	1934	only	-	Sep	16	0:00	0	S
Rule	Halifax	1935	only	-	Jun	 2	0:00	1:00	D
Rule	Halifax	1935	only	-	Sep	30	0:00	0	S
Rule	Halifax	1936	only	-	Jun	 1	0:00	1:00	D
Rule	Halifax	1936	only	-	Sep	14	0:00	0	S
Rule	Halifax	1937	1938	-	May	Sun>=1	0:00	1:00	D
Rule	Halifax	1937	1941	-	Sep	Mon>=24	0:00	0	S
Rule	Halifax	1939	only	-	May	28	0:00	1:00	D
Rule	Halifax	1940	1941	-	May	Sun>=1	0:00	1:00	D
Rule	Halifax	1946	1949	-	Apr	lastSun	2:00	1:00	D
Rule	Halifax	1946	1949	-	Sep	lastSun	2:00	0	S
Rule	Halifax	1951	1954	-	Apr	lastSun	2:00	1:00	D
Rule	Halifax	1951	1954	-	Sep	lastSun	2:00	0	S
Rule	Halifax	1956	1959	-	Apr	lastSun	2:00	1:00	D
Rule	Halifax	1956	1959	-	Sep	lastSun	2:00	0	S
Rule	Halifax	1962	1973	-	Apr	lastSun	2:00	1:00	D
Rule	Halifax	1962	1973	-	Oct	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Halifax	-4:14:24 -	LMT	1902 Jun 15
			-4:00	Halifax	A%sT	1918
			-4:00	Canada	A%sT	1919
			-4:00	Halifax	A%sT	1942 Feb  9  2:00s
			-4:00	Canada	A%sT	1946
			-4:00	Halifax	A%sT	1974
			-4:00	Canada	A%sT
Zone America/Glace_Bay	-3:59:48 -	LMT	1902 Jun 15
			-4:00	Canada	A%sT	1953
			-4:00	Halifax	A%sT	1954
			-4:00	-	AST	1972
			-4:00	Halifax	A%sT	1974
			-4:00	Canada	A%sT

# New Brunswick

# From Paul Eggert (2007-01-31):
# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
# says they changed at 00:01 through 2006, and
# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
# clear that this was the case since at least 1993.
# For now, assume it started in 1993.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Moncton	1933	1935	-	Jun	Sun>=8	1:00	1:00	D
Rule	Moncton	1933	1935	-	Sep	Sun>=8	1:00	0	S
Rule	Moncton	1936	1938	-	Jun	Sun>=1	1:00	1:00	D
Rule	Moncton	1936	1938	-	Sep	Sun>=1	1:00	0	S
Rule	Moncton	1939	only	-	May	27	1:00	1:00	D
Rule	Moncton	1939	1941	-	Sep	Sat>=21	1:00	0	S
Rule	Moncton	1940	only	-	May	19	1:00	1:00	D
Rule	Moncton	1941	only	-	May	 4	1:00	1:00	D
Rule	Moncton	1946	1972	-	Apr	lastSun	2:00	1:00	D
Rule	Moncton	1946	1956	-	Sep	lastSun	2:00	0	S
Rule	Moncton	1957	1972	-	Oct	lastSun	2:00	0	S
Rule	Moncton	1993	2006	-	Apr	Sun>=1	0:01	1:00	D
Rule	Moncton	1993	2006	-	Oct	lastSun	0:01	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Moncton	-4:19:08 -	LMT	1883 Dec  9
			-5:00	-	EST	1902 Jun 15
			-4:00	Canada	A%sT	1933
			-4:00	Moncton	A%sT	1942
			-4:00	Canada	A%sT	1946
			-4:00	Moncton	A%sT	1973
			-4:00	Canada	A%sT	1993
			-4:00	Moncton	A%sT	2007
			-4:00	Canada	A%sT

# Quebec

# From Paul Eggert (2020-01-10):
# See America/Toronto for most of Quebec, including Montreal.
# See America/Halifax for the Îles de la Madeleine and the Listuguj reserve.
# See America/Puerto_Rico for east of Natashquan.

# Ontario

# From Mark Brader (2003-07-26):
# [According to the Toronto Star] Orillia, Ontario, adopted DST
# effective Saturday, 1912-06-22, 22:00; the article mentions that
# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
# have already done so.  In Orillia DST was to run until Saturday,
# 1912-08-31 (no time mentioned), but it was met with considerable
# hostility from certain segments of the public, and was revoked after
# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but
# presumably that should be -07-06.  (1912-06-19, -07-12; also letters
# earlier in June).
#
# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
#
# From Paul Eggert (2017-07-08):
# For more on Orillia, see: Daubs K. Bold attempt at daylight saving
# time became a comic failure in Orillia. Toronto Star 2017-07-08.
# https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html
# From Paul Eggert (2025-03-20):
# Also see the 1912-06-17 front page of The Evening Sunbeam,
# reproduced in: Richardson M. "Daylight saving was a confusing
# time in Orillia" in the 2025-03-15 Orillia Matters. Richardson writes,
# "The first Sunday after the switch was made, [DST proponent and
# Orillia mayor William Sword] Frost walked into church an hour late.
# This became a symbol of the downfall of daylight saving in Orillia."
# The mayor became known as "Daylight Bill".
# https://www.orilliamatters.com/local-news/column-daylight-saving-was-a-confusing-time-in-orillia-10377529

# From Mark Brader (2010-03-06):
#
# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom
# right corner of page 1, it says that Toronto will return to standard
# time at 2 am Sunday morning (which agrees with the database), and that:
#
#     The one-hour setback will go into effect throughout most of Ontario,
#     except in areas like Windsor which remains on standard time all year.
#
# ... I don't know if Windsor began observing DST when Detroit did,
# or in 1974, or on some other date.
#
# By the way, the article continues by noting that:
#
#     Some cities in the United States have pushed the deadline back
#     three weeks and will change over from daylight saving in October.

# From Chris Walton (2024-01-09):
# The [Toronto] changes in 1947, 1948, and 1949 took place at 2:00 a.m. local
# time instead of midnight....  Toronto Daily Star - ...
# April 2, 1947 - Page 39 ... April 7, 1948 - Page 13 ...
# April 2, 1949 - Page 1 ... April 7, 1949 - Page 24 ...
# November 25, 1949 - Page 52 ... April 21, 1950 - Page 14 ...
# September 19, 1950 - Page 46 ... September 20, 1950 - Page 3 ...
# November 24, 1950 - Page 21

# From Arthur David Olson (2010-07-17):
#
# "Standard Time and Time Zones in Canada" appeared in
# The Journal of The Royal Astronomical Society of Canada,
# volume 26, number 2 (February 1932) and, as of 2010-07-17,
# was available at
# http://adsabs.harvard.edu/full/1932JRASC..26...49S
#
# It includes the text below (starting on page 57):
#
#   A list of the places in Canada using daylight saving time would
# require yearly revision. From information kindly furnished by
# the provincial governments and by the postmasters in many cities
# and towns, it is found that the following places used daylight sav-
# ing in 1930. The information for the province of Quebec is definite,
# for the other provinces only approximate:
#
#	Province	Daylight saving time used
# Prince Edward Island	Not used.
# Nova Scotia		In Halifax only.
# New Brunswick		In St. John only.
# Quebec		In the following places:
#			Montreal	Lachine
#			Quebec		Mont-Royal
#			Lévis		Iberville
#			St. Lambert	Cap de la Madelèine
#			Verdun		Loretteville
#			Westmount	Richmond
#			Outremont	St. Jérôme
#			Longueuil	Greenfield Park
#			Arvida		Waterloo
#			Chambly-Canton	Beaulieu
#			Melbourne	La Tuque
#			St. Théophile	Buckingham
# Ontario		Used generally in the cities and towns along
#			the southerly part of the province. Not
#			used in the northwesterly part.
# Manitoba		Not used.
# Saskatchewan		In Regina only.
# Alberta		Not used.
# British Columbia	Not used.
#
#   With some exceptions, the use of daylight saving may be said to be limited
# to those cities and towns lying between Quebec city and Windsor, Ont.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Toronto	1919	only	-	Mar	30	23:30	1:00	D
Rule	Toronto	1919	only	-	Oct	26	0:00	0	S
Rule	Toronto	1920	only	-	May	 2	2:00	1:00	D
Rule	Toronto	1920	only	-	Sep	26	0:00	0	S
Rule	Toronto	1921	only	-	May	15	2:00	1:00	D
Rule	Toronto	1921	only	-	Sep	15	2:00	0	S
Rule	Toronto	1922	1923	-	May	Sun>=8	2:00	1:00	D
# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
# was meant.
Rule	Toronto	1922	1926	-	Sep	Sun>=15	2:00	0	S
Rule	Toronto	1924	1927	-	May	Sun>=1	2:00	1:00	D
Rule	Toronto	1927	1937	-	Sep	Sun>=25	2:00	0	S
Rule	Toronto	1928	1937	-	Apr	Sun>=25	2:00	1:00	D
Rule	Toronto	1938	1940	-	Apr	lastSun	2:00	1:00	D
Rule	Toronto	1938	1939	-	Sep	lastSun	2:00	0	S
Rule	Toronto	1945	1948	-	Sep	lastSun	2:00	0	S
Rule	Toronto	1946	1973	-	Apr	lastSun	2:00	1:00	D
Rule	Toronto	1949	1950	-	Nov	lastSun	2:00	0	S
Rule	Toronto	1951	1956	-	Sep	lastSun	2:00	0	S
# Shanks & Pottenger say Toronto ended DST a week early in 1971,
# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
# is wrong, and that he had confirmed it by checking the 1971-10-30
# Toronto Star, which said that DST was ending 1971-10-31 as usual.
Rule	Toronto	1957	1973	-	Oct	lastSun	2:00	0	S

# The Bahamas match Toronto since 1970.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Toronto	-5:17:32 -	LMT	1895
			-5:00	Canada	E%sT	1919
			-5:00	Toronto	E%sT	1942 Feb  9  2:00s
			-5:00	Canada	E%sT	1946
			-5:00	Toronto	E%sT	1974
			-5:00	Canada	E%sT
# For Atikokan see America/Panama.


# Manitoba

# From Rob Douglas (2006-04-06):
# the old Manitoba Time Act - as amended by Bill 2, assented to
# March 27, 1987 ... said ...
# "between two o'clock Central Standard Time in the morning of
# the first Sunday of April of each year and two o'clock Central
# Standard Time in the morning of the last Sunday of October next
# following, one hour in advance of Central Standard Time."...
# I believe that the English legislation [of the old time act] had
# been assented to (March 22, 1967)....
# Also, as far as I can tell, there was no order-in-council varying
# the time of Daylight Saving Time for 2005 and so the provisions of
# the 1987 version would apply - the changeover was at 2:00 Central
# Standard Time (i.e. not until 3:00 Central Daylight Time).

# From Paul Eggert (2006-04-10):
# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
# starting 1966.  Since 02:00s is clearly correct for 1967 on, assume
# it was also 02:00s in 1966.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Winn	1916	only	-	Apr	23	0:00	1:00	D
Rule	Winn	1916	only	-	Sep	17	0:00	0	S
Rule	Winn	1918	only	-	Apr	14	2:00	1:00	D
Rule	Winn	1918	only	-	Oct	27	2:00	0	S
Rule	Winn	1937	only	-	May	16	2:00	1:00	D
Rule	Winn	1937	only	-	Sep	26	2:00	0	S
Rule	Winn	1942	only	-	Feb	 9	2:00	1:00	W # War
Rule	Winn	1945	only	-	Aug	14	23:00u	1:00	P # Peace
Rule	Winn	1945	only	-	Sep	lastSun	2:00	0	S
Rule	Winn	1946	only	-	May	12	2:00	1:00	D
Rule	Winn	1946	only	-	Oct	13	2:00	0	S
Rule	Winn	1947	1949	-	Apr	lastSun	2:00	1:00	D
Rule	Winn	1947	1949	-	Sep	lastSun	2:00	0	S
Rule	Winn	1950	only	-	May	 1	2:00	1:00	D
Rule	Winn	1950	only	-	Sep	30	2:00	0	S
Rule	Winn	1951	1960	-	Apr	lastSun	2:00	1:00	D
Rule	Winn	1951	1958	-	Sep	lastSun	2:00	0	S
Rule	Winn	1959	only	-	Oct	lastSun	2:00	0	S
Rule	Winn	1960	only	-	Sep	lastSun	2:00	0	S
Rule	Winn	1963	only	-	Apr	lastSun	2:00	1:00	D
Rule	Winn	1963	only	-	Sep	22	2:00	0	S
Rule	Winn	1966	1986	-	Apr	lastSun	2:00s	1:00	D
Rule	Winn	1966	2005	-	Oct	lastSun	2:00s	0	S
Rule	Winn	1987	2005	-	Apr	Sun>=1	2:00s	1:00	D
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Winnipeg	-6:28:36 -	LMT	1887 Jul 16
			-6:00	Winn	C%sT	2006
			-6:00	Canada	C%sT


# Saskatchewan

# From Mark Brader (2003-07-26):
# The first actual adoption of DST in Canada was at the municipal
# level.  As the [Toronto] Star put it (1912-06-07), "While people
# elsewhere have long been talking of legislation to save daylight,
# the city of Moose Jaw [Saskatchewan] has acted on its own hook."
# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
# presumably late evening, as below), and would run until "the end of
# the summer".  The discrepancy between municipal time and railroad
# time was noted.

# From Paul Eggert (2003-07-27):
# Willett (1914-03) notes that DST "has been in operation ... in the
# City of Moose Jaw, Saskatchewan, for one year."

# From Paul Eggert (2019-07-25):
# Pearce's book says Regina observed DST in 1914-1917.  No dates and times,
# unfortunately.  It also says that in 1914 Saskatoon observed DST
# from 1 June to 6 July, and that DST was also tried out in Davidson,
# Melfort, and Prince Albert.

# From Paul Eggert (2006-03-22):
# Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
# Other western towns (e.g. Lloydminster) are like Edmonton.
# Matthews and Vincent (1998) write that Denare Beach and Creighton
# are like Winnipeg, in violation of Saskatchewan law.

# From W. Jones (1992-11-06):
# The. . .below is based on information I got from our law library, the
# provincial archives, and the provincial Community Services department.
# A precise history would require digging through newspaper archives, and
# since you didn't say what you wanted, I didn't bother.
#
# Saskatchewan is split by a time zone meridian (105W) and over the years
# the boundary became pretty ragged as communities near it reevaluated
# their affiliations in one direction or the other.  In 1965 a provincial
# referendum favoured legislating common time practices.
#
# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
# Saskatchewan 1978) was proclaimed, and established that the eastern
# part of Saskatchewan would use CST year round, that districts in
# northwest Saskatchewan would by default follow CST but could opt to
# follow Mountain Time rules (thus 1 hour difference in the winter and
# zero in the summer), and that districts in southwest Saskatchewan would
# by default follow MT but could opt to follow CST.
#
# It took a few years for the dust to settle (I know one story of a town
# on one time zone having its school in another, such that a mom had to
# serve her family lunch in two shifts), but presently it seems that only
# a few towns on the border with Alberta (e.g. Lloydminster) follow MT
# rules any more; all other districts appear to have used CST year round
# since sometime in the 1960s.

# From Chris Walton (2006-06-26):
# The Saskatchewan time act which was last updated in 1996 is about 30 pages
# long and rather painful to read.
# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Regina	1918	only	-	Apr	14	2:00	1:00	D
Rule	Regina	1918	only	-	Oct	27	2:00	0	S
Rule	Regina	1930	1934	-	May	Sun>=1	0:00	1:00	D
Rule	Regina	1930	1934	-	Oct	Sun>=1	0:00	0	S
Rule	Regina	1937	1941	-	Apr	Sun>=8	0:00	1:00	D
Rule	Regina	1937	only	-	Oct	Sun>=8	0:00	0	S
Rule	Regina	1938	only	-	Oct	Sun>=1	0:00	0	S
Rule	Regina	1939	1941	-	Oct	Sun>=8	0:00	0	S
Rule	Regina	1942	only	-	Feb	 9	2:00	1:00	W # War
Rule	Regina	1945	only	-	Aug	14	23:00u	1:00	P # Peace
Rule	Regina	1945	only	-	Sep	lastSun	2:00	0	S
Rule	Regina	1946	only	-	Apr	Sun>=8	2:00	1:00	D
Rule	Regina	1946	only	-	Oct	Sun>=8	2:00	0	S
Rule	Regina	1947	1957	-	Apr	lastSun	2:00	1:00	D
Rule	Regina	1947	1957	-	Sep	lastSun	2:00	0	S
Rule	Regina	1959	only	-	Apr	lastSun	2:00	1:00	D
Rule	Regina	1959	only	-	Oct	lastSun	2:00	0	S
#
Rule	Swift	1957	only	-	Apr	lastSun	2:00	1:00	D
Rule	Swift	1957	only	-	Oct	lastSun	2:00	0	S
Rule	Swift	1959	1961	-	Apr	lastSun	2:00	1:00	D
Rule	Swift	1959	only	-	Oct	lastSun	2:00	0	S
Rule	Swift	1960	1961	-	Sep	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Regina	-6:58:36 -	LMT	1905 Sep
			-7:00	Regina	M%sT	1960 Apr lastSun  2:00
			-6:00	-	CST
Zone America/Swift_Current -7:11:20 -	LMT	1905 Sep
			-7:00	Canada	M%sT	1946 Apr lastSun  2:00
			-7:00	Regina	M%sT	1950
			-7:00	Swift	M%sT	1972 Apr lastSun  2:00
			-6:00	-	CST


# Alberta

# From Alois Treindl (2019-07-19):
# There was no DST in Alberta in 1967... Calgary Herald, 29 April 1967.
# 1969, no DST, from Edmonton Journal 18 April 1969
#
# From Paul Eggert (2019-07-25):
# Pearce's book says that Alberta's 1948 Daylight Saving Act required
# Mountain Standard Time without DST, and that "anyone who broke that law
# could be fined up to $25 and costs".  There seems to be no record of
# anybody paying the fine.  The law was not changed until an August 1971
# plebiscite reinstituted DST in 1972.  This story is also mentioned in:
# Boyer JP. Forcing Choice: The Risky Reward of Referendums. Dundum. 2017.
# ISBN 978-1459739123.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Edm	1918	1919	-	Apr	Sun>=8	2:00	1:00	D
Rule	Edm	1918	only	-	Oct	27	2:00	0	S
Rule	Edm	1919	only	-	May	27	2:00	0	S
Rule	Edm	1920	1923	-	Apr	lastSun	2:00	1:00	D
Rule	Edm	1920	only	-	Oct	lastSun	2:00	0	S
Rule	Edm	1921	1923	-	Sep	lastSun	2:00	0	S
Rule	Edm	1942	only	-	Feb	 9	2:00	1:00	W # War
Rule	Edm	1945	only	-	Aug	14	23:00u	1:00	P # Peace
Rule	Edm	1945	only	-	Sep	lastSun	2:00	0	S
Rule	Edm	1947	only	-	Apr	lastSun	2:00	1:00	D
Rule	Edm	1947	only	-	Sep	lastSun	2:00	0	S
Rule	Edm	1972	1986	-	Apr	lastSun	2:00	1:00	D
Rule	Edm	1972	2006	-	Oct	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Edmonton	-7:33:52 -	LMT	1906 Sep
			-7:00	Edm	M%sT	1987
			-7:00	Canada	M%sT


# British Columbia

# From Paul Eggert (2006-03-22):
# Shanks & Pottenger write that since 1970 most of this region has
# been like Vancouver.
# Dawson Creek uses MST.  Much of east BC is like Edmonton.

# From Matt Johnson (2015-09-21):
# Fort Nelson, BC, Canada will cancel DST this year.  So while previously they
# were aligned with America/Vancouver, they're now aligned with
# America/Dawson_Creek.
# http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html
#
# From Tim Parenti (2015-09-23):
# This requires a new zone for the Northern Rockies Regional Municipality,
# America/Fort_Nelson.  The resolution of 2014-12-08 was reached following a
# 2014-11-15 poll with nearly 75% support.  Effectively, the municipality has
# been on MST (-0700) like Dawson Creek since it advanced its clocks on
# 2015-03-08.
#
# From Paul Eggert (2019-07-25):
# Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver.
# Alois Treindl confirmed this on 07-22, citing the 1946-04-27 Vancouver Daily
# Province.  He also cited the 1946-09-28 Victoria Daily Times, which said
# that Vancouver, Victoria, etc. "change at midnight Saturday"; for now,
# guess they meant 02:00 Sunday since 02:00 was common practice in Vancouver.
#
# Early Vancouver, Volume Four, by Major J.S. Matthews, V.D., 2011 edition
# says that a 1922 plebiscite adopted DST, but a 1923 plebiscite rejected it.
# http://former.vancouver.ca/ctyclerk/archives/digitized/EarlyVan/SearchEarlyVan/Vol4pdf/MatthewsEarlyVancouverVol4_DaylightSavings.pdf
# A catalog entry for a newspaper clipping seems to indicate that Vancouver
# observed DST in 1941 from 07-07 through 09-27; see
# https://searcharchives.vancouver.ca/daylight-saving-1918-starts-again-july-7-1941-start-d-s-sept-27-end-of-d-s-1941
# We have no further details, so omit them for now.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Vanc	1918	only	-	Apr	14	2:00	1:00	D
Rule	Vanc	1918	only	-	Oct	27	2:00	0	S
Rule	Vanc	1942	only	-	Feb	 9	2:00	1:00	W # War
Rule	Vanc	1945	only	-	Aug	14	23:00u	1:00	P # Peace
Rule	Vanc	1945	only	-	Sep	30	2:00	0	S
Rule	Vanc	1946	1986	-	Apr	lastSun	2:00	1:00	D
Rule	Vanc	1946	only	-	Sep	29	2:00	0	S
Rule	Vanc	1947	1961	-	Sep	lastSun	2:00	0	S
Rule	Vanc	1962	2006	-	Oct	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Vancouver	-8:12:28 -	LMT	1884
			-8:00	Vanc	P%sT	1987
			-8:00	Canada	P%sT
Zone America/Dawson_Creek -8:00:56 -	LMT	1884
			-8:00	Canada	P%sT	1947
			-8:00	Vanc	P%sT	1972 Aug 30  2:00
			-7:00	-	MST
Zone America/Fort_Nelson	-8:10:47 -	LMT	1884
			-8:00	Vanc	P%sT	1946
			-8:00	-	PST	1947
			-8:00	Vanc	P%sT	1987
			-8:00	Canada	P%sT	2015 Mar  8  2:00
			-7:00	-	MST
# For Creston see America/Phoenix.

# Northwest Territories, Nunavut, Yukon

# From Chris Walton (2022-11-06):
# Whitehorse Star - Thursday April 22, 1965 - page 1
# title: DST Starts Monday ...
# https://www.newspapers.com/image/578587481/
# The title of this first article is wrong and/or misleading.
# Also, the start time shown in the  article is vague; it simply says "after
# midnight" when it probably should have stated 2:00a.m....
#
# Whitehorse Star - Monday October 25, 1965 - page 15 ...
# https://www.newspapers.com/image/578589147/
# The 1965 Yukon Council minutes can be found here:
# http://assets.yukonarchives.ca/PER_YG_06_1965_C20_S02_v1.pdf
# ... I do not currently believe that NWT touched any of its clocks in 1965....
#
# Whitehorse Star - Thursday Feb 24,1966 - page 2
# title: It's Time for YDT ...
# https://www.newspapers.com/image/578575979/ ...
# America/Whitehorse as a permanent change from UTC-9(YST) to
# UTC-8(PST) at 00:00 on Sunday February 27, 1966....
#
# Whitehorse Star - Friday April 28,1972 - page 6
# title: Daylight Saving Time for N.W.T....
# https://www.newspapers.com/image/578701610/ ...
# Nunavut and NWT zones ... DST starting in 1972.... Start and End ...
# should be the same as the rest of Canada
#
#
# From Paul Eggert (2022-11-06):
# For now, assume Yukon's 1965-04-22 spring forward was 00:00 -> 02:00, as this
# seems likely than 02:00 -> 04:00 and matches "after midnight".

# From Paul Eggert (2006-03-22):
# Dawson switched to PST in 1973.  Inuvik switched to MST in 1979.
# Mathew Englander (1996-10-07) gives the following refs:
#	* 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
#	c. 7 defines Yukon standard time as UTC-9....
#	see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
#	[https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html]
#	* C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
#	* O.I.C. 1980/02 established DST.
#	* O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.

# From Brian Inglis (2015-04-14):
#
# I tried to trace the history of Yukon time and found the following
# regulations, giving the reference title and URL if found, regulation name,
# and relevant quote if available.  Each regulation specifically revokes its
# predecessor.  The final reference is to the current Interpretation Act
# authorizing and resulting from these regulatory changes.
#
# Only recent regulations were retrievable via Yukon government site search or
# index, and only some via Canadian legal sources.  Other sources used include
# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS
# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and
# 1970 quoted below; each article includes current extracts from provincial
# and territorial ST and DST regulations at the end, summaries and details of
# standard times and daylight saving time at many locations across Canada,
# with time zone maps, tables and calculations for Canadian Sunrise, Sunset,
# and LMST; they also cover many countries and global locations, with a chart
# and table showing current Universal Time offsets, and may be useful as
# another source of information for 1970 and earlier.
#
# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
#   pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
#   http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75:
#   Yukon Interpretation Ordinance
#   Yukon standard time is the local mean time at the one hundred and
#   thirty-fifth meridian.
#
# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
#   JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
#   (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
#   Yukon Interpretation Ordinance, 1955, Chap. 16.
#
#     (1) Subject to this section, standard time shall be reckoned as nine
#     hours behind Greenwich Time and called Yukon Standard Time.
#
#     (2) Notwithstanding subsection (1), the Commissioner may make regulations
#     varying the manner of reckoning standard time.
#
# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
#   [no online source found]
#
# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
#   Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
#   http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon
#   Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
#
#     1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
#     Territory on 27th January, 1966, is hereby revoked.
#
#     2. Yukon (East) Standard Time as defined by section 36 of the
#     Interpretation Ordinance from and after mid-night on the 28th day of May,
#     1967 shall be reckoned in the same manner as Pacific Standard Time, that
#     is to say, eight hours behind Greenwich Time in the area of the Yukon
#     Territory lying east of the 138th degree longitude west.
#
#     3. In the remainder of the Territory, lying west of the 138th degree
#     longitude west, Yukon (West) Standard Time shall be reckoned as nine
#     hours behind Greenwich Time.
#
# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
#   https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
#   C.O. 1973/214 INTERPRETATION ACT ...
#
#     1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
#     revoked.
#
#     2. Yukon Standard Time as defined by section 36 of the Interpretation
#     Act from and after midnight on the twenty-eighth day of October, 1973
#     shall be reckoned in the same manner as Pacific Standard Time, that is
#     to say eight hours behind Greenwich Time.
#
# * O.I.C. 1980/02 INTERPRETATION ACT
#   https://mm.icann.org/pipermail/tz/attachments/20201125/d5adc93b/CAYTOIC1980-02DST1980-01-04-0001.pdf
#
# * Yukon Daylight Saving Time, YOIC 1987/56
#   https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
#   O.I.C. 1987/056 INTERPRETATION ACT ...
#
#   In every year between
#     (a) two o'clock in the morning in the first Sunday in April, and
#     (b) two o'clock in the morning in the last Sunday in October,
#   Standard Time shall be reckoned as seven hours behind Greenwich Time and
#   called Yukon Daylight Saving Time.
#   ...
#   Dated ... 9th day of March, A.D., 1987.
#
# * Yukon Daylight Saving Time 2006, YOIC 2006/127
#   https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
#   O.I.C. 2006/127 INTERPRETATION ACT ...
#
#     1. In Yukon each year the time for general purposes shall be 7 hours
#     behind Greenwich mean time during the period commencing at two o'clock
#     in the forenoon on the second Sunday of March and ending at two o'clock
#     in the forenoon on the first Sunday of November and shall be called
#     Yukon Daylight Saving Time.
#
#     2. Order-in-Council 1987/56 is revoked.
#
#     3. This order comes into force January 1, 2007.
#
# * Interpretation Act, RSY 2002, c 125
# https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html

# From Chris Walton (2022-11-06):
# The 5th edition of the Atlas of Canada contains a time zone map that
# shows both legislated and observed time zone boundaries.
# All communities on Baffin Island are shown to be observing Eastern time.
# The date on the map is 1984.
# https://ftp.maps.canada.ca/pub/nrcan_rncan/raster/atlas_5_ed/eng/other/referencemaps/mcr4056.pdf

# From Rives McDow (1999-09-04):
# Nunavut ... moved ... to incorporate the whole territory into one time zone.
# Nunavut moves to single time zone Oct. 31
# http://www.nunatsiaq.com/nunavut/nvt90903_13.html

# From Paul Eggert (1999-09-20):
# Basic Facts: The New Territory
# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html
# (1999) reports that ... Coral Harbour does not observe DST.

# From Paul Eggert (2000-10-02):
# Matthews and Vincent (1998) say the following, but we lack histories
# for these potential new Zones.
#
# The Canadian Forces station at Alert uses Eastern Time while the
# handful of residents at the Eureka weather station [in the Central
# zone] skip daylight savings.  Baffin Island, which is crossed by the
# Central, Eastern and Atlantic Time zones only uses Eastern Time.
# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
# Central Time and Southampton Island [in the Central zone] is not
# required to use daylight savings.

# From <http://www.nunatsiaqonline.ca/archives/nunavut001130/nvt21110_02.html>
# Nunavut now has two time zones (2000-11-10):
# The Nunavut government would allow its employees in Kugluktuk and
# Cambridge Bay to operate on central time year-round, putting them
# one hour behind the rest of Nunavut for six months during the winter.
# At the end of October the two communities had rebelled against
# Nunavut's unified time zone, refusing to shift to eastern time with
# the rest of the territory for the winter.  Cambridge Bay remained on
# central time, while Kugluktuk, even farther west, reverted to
# mountain time, which they had used before the advent of Nunavut's
# unified time zone in 1999.
#
# From Rives McDow (2001-01-20), quoting the Nunavut government:
# The preceding decision came into effect at midnight, Saturday Nov 4, 2000.

# From Paul Eggert (2000-12-04):
# Let's just keep track of the official times for now.

# From Rives McDow (2001-03-07):
# The premier of Nunavut has issued a ministerial statement advising
# that effective 2001-04-01, the territory of Nunavut will revert
# back to three time zones (mountain, central, and eastern).  Of the
# cities in Nunavut, Coral Harbor is the only one that I know of that
# has said it will not observe dst, staying on EST year round.  I'm
# checking for more info, and will get back to you if I come up with
# more.
# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]

# From Gwillim Law (2005-05-21):
# According to ...
# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
# (from a 1998 Canadian Geographic article), the de facto and de jure time
# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
# round.  Using Google, it's easy to find other websites that confirm this.
# I wasn't able to find how far back this time regimen goes, but since it
# predates the creation of Nunavut, it probably goes back many years....
# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
#
# From Paul Eggert (2014-10-17):
# For lack of better information, assume that Southampton Island observed
# daylight saving only during wartime.  Gwillim Law's email also
# mentioned maps now maintained by National Research Council Canada;
# see above for an up-to-date link.

# From Chris Walton (2007-03-01):
# ... the community of Resolute (located on Cornwallis Island in
# Nunavut) moved from Central Time to Eastern Time last November.
# Basically the community did not change its clocks at the end of
# daylight saving....
# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html

# From Chris Walton (2011-03-21):
# Back in 2007 I initiated the creation of a new "zone file" for Resolute
# Bay. Resolute Bay is a small community located about 900km north of
# the Arctic Circle. The zone file was required because Resolute Bay had
# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007.
#
# According to new information which I received last week, Resolute Bay
# went back to using UTC-6 in the winter of 2007-2008...
#
# On March 11/2007 most of Canada went onto daylight saving. On March
# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I
# talked to somebody that was both knowledgeable and helpful. I was able
# to confirm that Resolute Bay was still operating on UTC-5. It was
# explained to me that Resolute Bay had been on the Eastern Time zone
# (EST) in the winter, and was now back on the Central Time zone (CDT).
# i.e. the time zone had changed twice in the last year but the clocks
# had not moved. The residents had to know which time zone they were in
# so they could follow the correct TV schedule...
#
# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I
# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature
# of the phone call, I decided to seek out an alternate source of
# information. I found an e-mail address for somebody by the name of
# Stephanie Adams whose job was listed as "Inns North Support Officer for
# Arctic Co-operatives." I was under the impression that Stephanie lived
# and worked in Resolute Bay...
#
# On March 14/2011 I phoned the hamlet office again. I was told that
# Resolute Bay had been using Central Standard Time over the winter of
# 2010-2011 and that the clocks had therefore been moved one hour ahead
# on March 13/2011. The person I talked to was aware that Resolute Bay
# had previously experimented with Eastern Standard Time but he could not
# tell me when the practice had stopped.
#
# On March 17/2011 I searched the Web to find an e-mail address of
# somebody that might be able to tell me exactly when Resolute Bay went
# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz
# used to be the mayor of Resolute Bay and he apparently owns half the
# businesses including "South Camp Inn." This website has some info on
# Aziz:
# http://www.uphere.ca/node/493
#
# I sent Aziz an e-mail asking when Resolute Bay had stopped using
# Eastern Standard Time.
#
# Aziz responded quickly with this: "hi, The time was not changed for the
# 1 year only, the following year, the community went back to the old way
# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in
# the winter Zulu plus 6 hrs"
#
# This of course conflicted with everything I had ascertained in November 2008.
#
# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz
# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You
# may want to check with the weather office in Resolute Bay or do a
# search on the weather through Env. Canada. web site"
#
# If I had realized the Stephanie did not live in Resolute Bay I would
# never have contacted her.  I now believe that all the information I
# obtained in November 2008 should be ignored...
# I apologize for reporting incorrect information in 2008.

# From Tim Parenti (2020-03-05):
# The government of Yukon announced [yesterday] the cessation of seasonal time
# changes.  "After clocks are pushed ahead one hour on March 8, the territory
# will remain on [UTC-07].  ... [The government] found 93 per cent of
# respondents wanted to end seasonal time changes and, of that group, 70 per
# cent wanted 'permanent Pacific Daylight Saving Time.'"
# https://www.cbc.ca/news/canada/north/yukon-end-daylight-saving-time-1.5486358
#
# Although the government press release prefers PDT, we prefer MST for
# consistency with nearby Dawson Creek, Creston, and Fort Nelson.
# https://yukon.ca/en/news/yukon-end-seasonal-time-change

# From Andrew G. Smith (2020-09-24):
# Yukon has completed its regulatory change to be on UTC -7 year-round....
# http://www.gov.yk.ca/legislation/regs/oic2020_125.pdf
# What we have done is re-defined Yukon Standard Time, as we are
# authorized to do under section 33 of our Interpretation Act:
# http://www.gov.yk.ca/legislation/acts/interpretation_c.pdf
#
# From Paul Eggert (2020-09-24):
# tzdb uses the obsolete YST abbreviation for standard time in Yukon through
# about 1970, and uses PST for standard time in Yukon since then.  Consistent
# with that, use MST for -07, the new standard time in Yukon effective Nov. 1.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	NT_YK	1918	only	-	Apr	14	2:00	1:00	D
Rule	NT_YK	1918	only	-	Oct	27	2:00	0	S
Rule	NT_YK	1919	only	-	May	25	2:00	1:00	D
Rule	NT_YK	1919	only	-	Nov	 1	0:00	0	S
Rule	NT_YK	1942	only	-	Feb	 9	2:00	1:00	W # War
Rule	NT_YK	1945	only	-	Aug	14	23:00u	1:00	P # Peace
Rule	NT_YK	1945	only	-	Sep	30	2:00	0	S
Rule	NT_YK	1972	1986	-	Apr	lastSun	2:00	1:00	D
Rule	NT_YK	1972	2006	-	Oct	lastSun	2:00	0	S
Rule	NT_YK	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
Rule	Yukon	1965	only	-	Apr	lastSun	0:00	2:00	DD
Rule	Yukon	1965	only	-	Oct	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
# formerly Frobisher Bay
Zone America/Iqaluit	0	-	-00	1942 Aug # Frobisher Bay est.
			-5:00	NT_YK	E%sT	1999 Oct 31  2:00
			-6:00	Canada	C%sT	2000 Oct 29  2:00
			-5:00	Canada	E%sT
# aka Qausuittuq
Zone America/Resolute	0	-	-00	1947 Aug 31 # Resolute founded
			-6:00	NT_YK	C%sT	2000 Oct 29  2:00
			-5:00	-	EST	2001 Apr  1  3:00
			-6:00	Canada	C%sT	2006 Oct 29  2:00
			-5:00	-	EST	2007 Mar 11  3:00
			-6:00	Canada	C%sT
# aka Kangiqiniq
Zone America/Rankin_Inlet 0	-	-00	1957 # Rankin Inlet founded
			-6:00	NT_YK	C%sT	2000 Oct 29  2:00
			-5:00	-	EST	2001 Apr  1  3:00
			-6:00	Canada	C%sT
# aka Iqaluktuuttiaq
Zone America/Cambridge_Bay 0	-	-00	1920 # trading post est.?
			-7:00	NT_YK	M%sT	1999 Oct 31  2:00
			-6:00	Canada	C%sT	2000 Oct 29  2:00
			-5:00	-	EST	2000 Nov  5  0:00
			-6:00	-	CST	2001 Apr  1  3:00
			-7:00	Canada	M%sT
Zone America/Inuvik	0	-	-00	1953 # Inuvik founded
			-8:00	NT_YK	P%sT	1979 Apr lastSun  2:00
			-7:00	NT_YK	M%sT	1980
			-7:00	Canada	M%sT
Zone America/Whitehorse	-9:00:12 -	LMT	1900 Aug 20
			-9:00	NT_YK	Y%sT	1965
			-9:00	Yukon	Y%sT	1966 Feb 27  0:00
			-8:00	-	PST	1980
			-8:00	Canada	P%sT	2020 Nov  1
			-7:00	-	MST
Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
			-9:00	NT_YK	Y%sT	1965
			-9:00	Yukon	Y%sT	1973 Oct 28  0:00
			-8:00	-	PST	1980
			-8:00	Canada	P%sT	2020 Nov  1
			-7:00	-	MST


###############################################################################

# Mexico

# From Paul Eggert (2014-12-07):
# The Investigation and Analysis Service of the
# Mexican Library of Congress (MLoC) has published a
# history of Mexican local time (in Spanish)
# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm
#
# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
# (In all cases we go with the MLoC.)
# S&P report that Baja was at -8:00 in 1922/1923.
# S&P say the 1930 transition in Baja was 1930-11-16.
# S&P report no DST during summer 1931.
# S&P report a transition at 1932-03-30 23:00, not 1932-04-01.

# From Gwillim Law (2001-02-20):
# There are some other discrepancies between the Decrees page and the
# tz database.  I think they can best be explained by supposing that
# the researchers who prepared the Decrees page failed to find some of
# the relevant documents.

# From Heitor David Pinto (2024-08-04):
# In 1931, the decree implementing DST specified that it would take
# effect on 30 April....
# https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192270&pagina=2&seccion=1
#
# In 1981, the decree changing Campeche, Yucatán and Quintana Roo to UTC-5
# specified that it would enter into force on 26 December 1981 at 2:00....
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4705667&fecha=23/12/1981&cod_diario=202796
#
# In 1982, the decree returning Campeche and Yucatán to UTC-6 specified that
# it would enter into force on 2 November 1982 at 2:00....
# https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=205689&pagina=3&seccion=0
#
# Quintana Roo changed to UTC-6 on 4 January 1983 at 0:00, and again
# to UTC-5 on 26 October 1997 at 2:00....
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4787355&fecha=28/12/1982&cod_diario=206112
# https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=209559&pagina=15&seccion=0
#
# Durango, Coahuila, Nuevo León and Tamaulipas were set to UTC-7 on 1 January
# 1922, and changed to UTC-6 on 10 June 1927.  Then Durango, Coahuila and
# Nuevo León (but not Tamaulipas) returned to UTC-7 on 15 November 1930,
# observed DST in 1931, and changed again to UTC-6 on 1 April 1932....
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4441846&fecha=29/12/1921&cod_diario=187468
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4491963&fecha=15/11/1930&cod_diario=190835
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4418437&fecha=21/01/1932&cod_diario=185588
#
# ... the ... 10 June 1927 ... decree only said 10 June 1927, without
# specifying a time, so I suppose that it should be considered at 0:00.
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920
#
# In 1942, the decree changing Baja California, Baja California Sur, Sonora,
# Sinaloa and Nayarit to UTC-7 was published on 24 April, but it said that it
# would apply from 1 April, so it's unclear when the change actually
# occurred. The database currently shows 24 April 1942.
# https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192203&pagina=2&seccion=1
#
# Baja California Sur, Sonora, Sinaloa and Nayarit never used UTC-8.  The ...
# 14 January 1949 ... change [to UTC-8] only occurred in Baja California.
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309
#
# In 1945, the decree changing Baja California to UTC-8 specified that it
# would take effect on the third day from its publication.
# It was published on 12 November, so it would take effect on 15 November....
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4555049&fecha=12/11/1945&cod_diario=194763
#
# In 1948, the decree changing Baja California to UTC-7 specified that it
# would take effect on "this date".  The decree was made on 13 March,
# but published on 5 April, so it's unclear when the change actually occurred.
# The database currently shows 5 April 1948.
# https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=188624&pagina=2&seccion=0
#
# In 1949, the decree changing Baja California to UTC-8 was published on 13
# January, but it said that it would apply from 1 January, so it's unclear when
# the change actually occurred.  The database currently shows 14 January 1949.
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309
#
# Baja California also observed UTC-7 from 1 May to 24 September 1950,
# from 29 April to 30 September 1951 at 2:00,
# and from 27 April to 28 September 1952 at 2:00....
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4600403&fecha=29/04/1950&cod_diario=197505
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4623553&fecha=23/09/1950&cod_diario=198805
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4469444&fecha=27/04/1951&cod_diario=189317
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4533868&fecha=10/03/1952&cod_diario=193465
#
# All changes in Baja California from 1948 to 1952 match those in California,
# on the same dates or with a difference of one day.
# So it may be easier to implement these changes as DST with rule CA
# during this whole period.
#
# From Paul Eggert (2024-08-18):
# For now, maintain the slightly-different history for Baja California,
# as we have no information on whether 1948/1952 clocks in Tijuana followed
# the decrees or followed San Diego.

# From Alan Perry (1996-02-15):
# A guy from our Mexico subsidiary finally found the Presidential Decree
# outlining the timezone changes in Mexico.
#
# ------------- Begin Forwarded Message -------------
#
# I finally got my hands on the Official Presidential Decree that sets up the
# rules for the DST changes. The rules are:
#
# 1. The country is divided in 3 timezones:
#    - Baja California Norte (the Mexico/BajaNorte TZ)
#    - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
#    - The rest of the country (the Mexico/General TZ)
#
# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
#    at 2:00 AM, the times in each zone are as follows:
#    BajaNorte: GMT+7
#    BajaSur:   GMT+6
#    General:   GMT+5
#
# 3. The rest of the year, the times are as follows:
#    BajaNorte: GMT+8
#    BajaSur:   GMT+7
#    General:   GMT+6
#
# The Decree was published in Mexico's Official Newspaper on January 4th.
#
# -------------- End Forwarded Message --------------
# From Paul Eggert (1996-06-12):
# For an English translation of the decree, see
# "Diario Oficial: Time Zone Changeover" (1996-01-04).
# http://mexico-travel.com/extra/timezone_eng.html

# From Rives McDow (1998-10-08):
# The State of Quintana Roo has reverted back to central STD and DST times
# (i.e. UTC -0600 and -0500 as of 1998-08-02).

# From Rives McDow (2000-01-10):
# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
# zone 5 hours from the International Date Line, and will not observe daylight
# savings time so as to stay on the same time zone as the southern part of
# Arizona year round.

# From Jesper Nørgaard, translating
# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
# In Oaxaca, the 55.000 teachers from the Section 22 of the National
# Syndicate of Education Workers, refuse to apply daylight saving each
# year, so that the more than 10,000 schools work at normal hour the
# whole year.

# From Gwillim Law (2001-01-19):
# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
# (translated):...
# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
# that Summer Time will be reduced from seven to five months, starting
# this year....
# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001
# [translated], says "summer time will ... take effect on the first Sunday
# in May, and end on the last Sunday of September.

# From Arthur David Olson (2001-01-25):
# The 2001-01-24 traditional Washington Post contained the page one
# story "Timely Issue Divides Mexicans."...
# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
# ... Mexico City Mayor López Obrador "...is threatening to keep
# Mexico City and its 20 million residents on a different time than
# the rest of the country..." In particular, López Obrador would abolish
# observation of Daylight Saving Time.

# Official statute published by the Energy Department
# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre
# (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
# and Sonora with no DST.  This was reported by Jesper Nørgaard (2001-02-03).

# From Paul Eggert (2001-03-03):
#
# https://www.latimes.com/archives/la-xpm-2001-mar-03-mn-32561-story.html
# James F. Smith writes in today's LA Times
# * Sonora will continue to observe standard time.
# * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that
#   the Federal District will not adopt DST.
# * 4 of 16 district leaders announced they'll ignore the decree.
# * The decree does not affect federal-controlled facilities including
#   the airport, banks, hospitals, and schools.
#
# For now we'll assume that the Federal District will bow to federal rules.

# From Jesper Nørgaard (2001-04-01):
# I found some references to the Mexican application of daylight
# saving, which modifies what I had already sent you, stating earlier
# that a number of northern Mexican states would go on daylight
# saving. The modification reverts this to only cover Baja California
# (Norte), while all other states (except Sonora, who has no daylight
# saving all year) will follow the original decree of president
# Vicente Fox, starting daylight saving May 6, 2001 and ending
# September 30, 2001.
# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp>
# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)

# From Reuters (2001-09-04):
# Mexico's Supreme Court on Tuesday declared that daylight savings was
# unconstitutional in Mexico City, creating the possibility the
# capital will be in a different time zone from the rest of the nation
# next year....  The Supreme Court's ruling takes effect at 2:00
# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
# standard time. "This is so residents of the Federal District are not
# subject to unexpected time changes," a statement from the court said.

# From Jesper Nørgaard Welen (2002-03-12):
# ... consulting my local grocery store(!) and my coworkers, they all insisted
# that a new decision had been made to reinstate US style DST in Mexico....
# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
# confirms this.  Sonora as usual is the only state where DST is not applied.

# From Steffen Thorsen (2009-12-28):
#
# Steffen Thorsen wrote:
# > Mexico's House of Representatives has approved a proposal for northern
# > Mexico's border cities to share the same daylight saving schedule as
# > the United States.
# Now this has passed both the Congress and the Senate, so starting from
# 2010, some border regions will be the same:
# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/
# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939
# (Spanish)
#
# Could not find the new law text, but the proposed law text changes are here:
# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf
# (Gaceta Parlamentaria)
#
# There is also a list of the votes here:
# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
#
# Our page:
# https://www.timeanddate.com/news/time/north-mexico-dst-change.html

# From Arthur David Olson (2010-01-20):
# The page
# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
# includes this text:
# En los municipios fronterizos de Tijuana y Mexicali en Baja California;
# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila;
# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en
# Tamaulipas, la aplicación de este horario estacional surtirá efecto
# desde las dos horas del segundo domingo de marzo y concluirá a las dos
# horas del primer domingo de noviembre.
# En los municipios fronterizos que se encuentren ubicados en la franja
# fronteriza norte en el territorio comprendido entre la línea
# internacional y la línea paralela ubicada a una distancia de veinte
# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el
# interior del país, la aplicación de este horario estacional surtirá
# efecto desde las dos horas del segundo domingo de marzo y concluirá a
# las dos horas del primer domingo de noviembre.

# From Steffen Thorsen (2014-12-08), translated by Gwillim Law:
# The Mexican state of Quintana Roo will likely change to EST in 2015.
#
# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo
# "With this change, the time conflict that has existed between the municipios
# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an
# end. The latter declared itself in rebellion 15 years ago when a time change
# was initiated in Mexico, and since then it has refused to change its time
# zone along with the rest of the country."
#
# From Steffen Thorsen (2015-01-14), translated by Gwillim Law:
# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html
# "...the new time zone will come into effect at two o'clock on the first Sunday
# of February, when we will have to advance the clock one hour from its current
# time..."
# Also, the new zone will not use DST.
#
# From Carlos Raúl Perasso (2015-02-02):
# The decree that modifies the Mexican Hour System Law has finally
# been published at the Diario Oficial de la Federación
# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015
# It establishes 5 zones for Mexico:
# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W,
#    includes most of Mexico, excluding what's mentioned below.
# 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the
#    states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía
#    de Banderas which lies in Central Zone); Sinaloa and Sonora.
# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the
#    state of Baja California.
# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
#    of Quintana Roo.
# 5- The islands, reefs and keys shall take their timezone from the
#    longitude they are located at.

# From Paul Eggert (2022-10-28):
# The new Mexican law was published today:
# https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022
# This abolishes DST except where US DST rules are observed,
# and in addition changes all of Chihuahua to -06 with no DST.

# From Heitor David Pinto (2022-11-28):
# Now the northern [municipios] want to have the same time zone as the
# respective neighboring cities in the US, for example Juárez in UTC-7 with
# DST, matching El Paso, and Ojinaga in UTC-6 with DST, matching Presidio....
# the president authorized the publication of the decree for November 29,
# so the time change would occur on November 30 at 0:00.
# http://puentelibre.mx/noticia/ciudad_juarez_cambio_horario_noviembre_2022/

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Mexico	1931	only	-	Apr	30	0:00	1:00	D
Rule	Mexico	1931	only	-	Oct	1	0:00	0	S
Rule	Mexico	1939	only	-	Feb	5	0:00	1:00	D
Rule	Mexico	1939	only	-	Jun	25	0:00	0	S
Rule	Mexico	1940	only	-	Dec	9	0:00	1:00	D
Rule	Mexico	1941	only	-	Apr	1	0:00	0	S
Rule	Mexico	1943	only	-	Dec	16	0:00	1:00	W # War
Rule	Mexico	1944	only	-	May	1	0:00	0	S
Rule	Mexico	1950	only	-	Feb	12	0:00	1:00	D
Rule	Mexico	1950	only	-	Jul	30	0:00	0	S
Rule	Mexico	1996	2000	-	Apr	Sun>=1	2:00	1:00	D
Rule	Mexico	1996	2000	-	Oct	lastSun	2:00	0	S
Rule	Mexico	2001	only	-	May	Sun>=1	2:00	1:00	D
Rule	Mexico	2001	only	-	Sep	lastSun	2:00	0	S
Rule	Mexico	2002	2022	-	Apr	Sun>=1	2:00	1:00	D
Rule	Mexico	2002	2022	-	Oct	lastSun	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
# Quintana Roo; represented by Cancún
Zone America/Cancun	-5:47:04 -	LMT	1922 Jan  1  6:00u
			-6:00	-	CST	1981 Dec 26  2:00
			-5:00	-	EST	1983 Jan  4  0:00
			-6:00	Mexico	C%sT	1997 Oct 26  2:00
			-5:00	Mexico	E%sT	1998 Aug  2  2:00
			-6:00	Mexico	C%sT	2015 Feb  1  2:00
			-5:00	-	EST
# Campeche, Yucatán; represented by Mérida
Zone America/Merida	-5:58:28 -	LMT	1922 Jan  1  6:00u
			-6:00	-	CST	1981 Dec 26  2:00
			-5:00	-	EST	1982 Nov  2  2:00
			-6:00	Mexico	C%sT
# Coahuila, Nuevo León, Tamaulipas (near US border)
# This includes the following municipios:
#   in Coahuila: Acuña, Allende, Guerrero, Hidalgo, Jiménez, Morelos, Nava,
#     Ocampo, Piedras Negras, Villa Unión, Zaragoza
#   in Nuevo León: Anáhuac
#   in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo,
#     Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros.
# https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022
Zone America/Matamoros	-6:30:00 -	LMT	1922 Jan  1  6:00u
			-6:00	-	CST	1988
			-6:00	US	C%sT	1989
			-6:00	Mexico	C%sT	2010
			-6:00	US	C%sT
# Durango; Coahuila, Nuevo León, Tamaulipas (away from US border)
Zone America/Monterrey	-6:41:16 -	LMT	1922 Jan  1  6:00u
			-7:00	-	MST	1927 Jun 10
			-6:00	-	CST	1930 Nov 15
			-7:00	Mexico	M%sT	1932 Apr  1
			-6:00	-	CST	1988
			-6:00	US	C%sT	1989
			-6:00	Mexico	C%sT
# Central Mexico
Zone America/Mexico_City -6:36:36 -	LMT	1922 Jan  1  7:00u
			-7:00	-	MST	1927 Jun 10
			-6:00	-	CST	1930 Nov 15
			-7:00	Mexico	M%sT	1932 Apr  1
			-6:00	Mexico	C%sT	2001 Sep 30  2:00
			-6:00	-	CST	2002 Feb 20
			-6:00	Mexico	C%sT
# Chihuahua (near US border - western side)
# This includes the municipios of Janos, Ascensión, Juárez, Guadalupe, and
# Práxedis G Guerrero.
# http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf
Zone America/Ciudad_Juarez -7:05:56 -	LMT	1922 Jan  1  7:00u
			-7:00	-	MST	1927 Jun 10
			-6:00	-	CST	1930 Nov 15
			-7:00	Mexico	M%sT	1932 Apr  1
			-6:00	-	CST	1996
			-6:00	Mexico	C%sT	1998
			-6:00	-	CST	1998 Apr Sun>=1  3:00
			-7:00	Mexico	M%sT	2010
			-7:00	US	M%sT	2022 Oct 30  2:00
			-6:00	-	CST	2022 Nov 30  0:00
			-7:00	US	M%sT
# Chihuahua (near US border - eastern side)
# This includes the municipios of Coyame del Sotol, Ojinaga, and Manuel
# Benavides.
# http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf
Zone America/Ojinaga	-6:57:40 -	LMT	1922 Jan  1  7:00u
			-7:00	-	MST	1927 Jun 10
			-6:00	-	CST	1930 Nov 15
			-7:00	Mexico	M%sT	1932 Apr  1
			-6:00	-	CST	1996
			-6:00	Mexico	C%sT	1998
			-6:00	-	CST	1998 Apr Sun>=1  3:00
			-7:00	Mexico	M%sT	2010
			-7:00	US	M%sT	2022 Oct 30  2:00
			-6:00	-	CST	2022 Nov 30  0:00
			-6:00	US	C%sT
# Chihuahua (away from US border)
Zone America/Chihuahua	-7:04:20 -	LMT	1922 Jan  1  7:00u
			-7:00	-	MST	1927 Jun 10
			-6:00	-	CST	1930 Nov 15
			-7:00	Mexico	M%sT	1932 Apr  1
			-6:00	-	CST	1996
			-6:00	Mexico	C%sT	1998
			-6:00	-	CST	1998 Apr Sun>=1  3:00
			-7:00	Mexico	M%sT	2022 Oct 30  2:00
			-6:00	-	CST
# Sonora
Zone America/Hermosillo	-7:23:52 -	LMT	1922 Jan  1  7:00u
			-7:00	-	MST	1927 Jun 10
			-6:00	-	CST	1930 Nov 15
			-7:00	Mexico	M%sT	1932 Apr  1
			-6:00	-	CST	1942 Apr 24
			-7:00	-	MST	1996
			-7:00	Mexico	M%sT	1999
			-7:00	-	MST

# Baja California Sur, Nayarit (except Bahía de Banderas), Sinaloa
Zone America/Mazatlan	-7:05:40 -	LMT	1922 Jan  1  7:00u
			-7:00	-	MST	1927 Jun 10
			-6:00	-	CST	1930 Nov 15
			-7:00	Mexico	M%sT	1932 Apr  1
			-6:00	-	CST	1942 Apr 24
			-7:00	-	MST	1970
			-7:00	Mexico	M%sT

# Bahía de Banderas

# From Alexander Krivenyshev (2010-04-21):
# According to news, Bahía de Banderas (Mexican state of Nayarit)
# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to
# share the same time zone as nearby city Puerto Vallarta, Jalisco).
#
# (Spanish)
# Bahía de Banderas homologa su horario al del centro del
# país, a partir de este domingo
# http://www.nayarit.gob.mx/notes.asp?id=20748
#
# Bahía de Banderas homologa su horario con el del Centro del
# País
# http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50
#
# (English)
# Puerto Vallarta and Bahía de Banderas: One Time Zone
# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml
# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html
#
# "Mexico's Senate approved the amendments to the Mexican Schedule System that
# will allow Bahía de Banderas and Puerto Vallarta to share the same time
# zone ..."
# Baja California Sur, Nayarit, Sinaloa

# From Arthur David Olson (2010-05-01):
# Use "Bahia_Banderas" to keep the name to fourteen characters.

Zone America/Bahia_Banderas -7:01:00 -	LMT	1922 Jan  1  7:00u
			-7:00	-	MST	1927 Jun 10
			-6:00	-	CST	1930 Nov 15
			-7:00	Mexico	M%sT	1932 Apr  1
			-6:00	-	CST	1942 Apr 24
			-7:00	-	MST	1970
			-7:00	Mexico	M%sT	2010 Apr  4  2:00
			-6:00	Mexico	C%sT

# Baja California
Zone America/Tijuana	-7:48:04 -	LMT	1922 Jan  1  7:00u
			-7:00	-	MST	1924
			-8:00	-	PST	1927 Jun 10
			-7:00	-	MST	1930 Nov 15
			-8:00	-	PST	1931 Apr  1
			-8:00	1:00	PDT	1931 Sep 30
			-8:00	-	PST	1942 Apr 24
			-8:00	1:00	PWT	1945 Aug 14 23:00u
			-8:00	1:00	PPT	1945 Nov 15 # Peace
			-8:00	-	PST	1948 Apr  5
			-8:00	1:00	PDT	1949 Jan 14
			-8:00	-	PST	1950 May  1
			-8:00	1:00	PDT	1950 Sep 24
			-8:00	-	PST	1951 Apr 29  2:00
			-8:00	1:00	PDT	1951 Sep 30  2:00
			-8:00	-	PST	1952 Apr 27  2:00
			-8:00	1:00	PDT	1952 Sep 28  2:00
			-8:00	-	PST	1954
			-8:00	CA	P%sT	1961
			-8:00	-	PST	1976
			-8:00	US	P%sT	1996
			-8:00	Mexico	P%sT	2001
			-8:00	US	P%sT	2002 Feb 20
			-8:00	Mexico	P%sT	2010
			-8:00	US	P%sT
# From Paul Eggert (2006-03-22):
# Formerly there was an America/Ensenada zone, which differed from
# America/Tijuana only in that it did not observe DST from 1976
# through 1995.  This was as per Shanks (1999).  But Shanks & Pottenger say
# Ensenada did not observe DST from 1948 through 1975.  Guy Harris reports
# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and
# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
# DST-observance was a town-by-town matter back then.  This concerns
# data after 1970 so most likely there should be at least one Zone
# other than America/Tijuana for Baja, but it's not clear yet what its
# name or contents should be.
#
# From Paul Eggert (2015-10-08):
# Formerly there was an America/Santa_Isabel zone, but this appears to
# have come from a misreading of
# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
# It has been moved to the 'backward' file.
#
# From Paul Eggert (2022-10-28):
# Today's new law states that the entire state of Baja California
# follows US DST rules, which agrees with simplifications noted above.
#
#
# Revillagigedo Is
# no information

###############################################################################

# Barbados

# For 1899 Milne gives -3:58:29.2.

# From P Chan (2020-12-09 and 2020-12-11):
# Standard time of GMT-4 was adopted in 1911.
# Definition of Time Act, 1911 (1911-7) [1911-08-28]
# 1912, Laws of Barbados (5 v.), OCLC Number: 919801291, Vol. 4, Image No. 522
# 1944, Laws of Barbados (5 v.), OCLC Number: 84548697, Vol. 4, Image No. 122
# http://llmc.com/browse.aspx?type=2&coll=85&div=297
#
# DST was observed in 1942-44.
# Defence (Daylight Saving) Regulations, 1942, 1942-04-13
# Defence (Daylight Saving) (Repeal) Regulations, 1942, 1942-08-22
# Defence (Daylight Saving) Regulations, 1943, 1943-04-16
# Defence (Daylight Saving) (Repeal) Regulations, 1943, 1943-09-01
# Defence (Daylight Saving) Regulations, 1944, 1944-03-21
# [Defence (Daylight Saving) (Amendment) Regulations 1944, 1944-03-28]
# Defence (Daylight Saving) (Repeal) Regulations, 1944, 1944-08-30
#
# 1914-, Subsidiary Legis., Annual Vols. OCLC Number: 226290591
# 1942: Image Nos. 527-528, 555-556
# 1943: Image Nos. 178-179, 198
# 1944: Image Nos. 113-115, 129
# http://llmc.com/titledescfull.aspx?type=2&coll=85&div=297&set=98437
#
# From Tim Parenti (2021-02-20):
# The transitions below are derived from P Chan's sources, except that the 1977
# through 1980 transitions are from Shanks & Pottenger since we have no better
# data there.  Of particular note, the 1944 DST regulation only advanced the
# time to "exactly three and a half hours later than Greenwich mean time", as
# opposed to "three hours" in the 1942 and 1943 regulations.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Barb	1942	only	-	Apr	19	5:00u	1:00	D
Rule	Barb	1942	only	-	Aug	31	6:00u	0	S
Rule	Barb	1943	only	-	May	 2	5:00u	1:00	D
Rule	Barb	1943	only	-	Sep	 5	6:00u	0	S
Rule	Barb	1944	only	-	Apr	10	5:00u	0:30	-
Rule	Barb	1944	only	-	Sep	10	6:00u	0	S
Rule	Barb	1977	only	-	Jun	12	2:00	1:00	D
Rule	Barb	1977	1978	-	Oct	Sun>=1	2:00	0	S
Rule	Barb	1978	1980	-	Apr	Sun>=15	2:00	1:00	D
Rule	Barb	1979	only	-	Sep	30	2:00	0	S
Rule	Barb	1980	only	-	Sep	25	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
		#STDOFF	-3:58:29.2
Zone America/Barbados	-3:58:29 -	LMT	1911 Aug 28 # Bridgetown
			-4:00	Barb	A%sT	1944
			-4:00	Barb	AST/-0330 1945
			-4:00	Barb	A%sT

# Belize

# From P Chan (2020-11-03):
# Below are some laws related to the time in British Honduras/Belize:
#
# Definition of Time Ordinance, 1927 (No.4 of 1927) [1927-04-01]
# Ordinances of British Honduras Passed in the Year 1927, p 19-20
# https://books.google.com/books?id=LqEpAQAAMAAJ&pg=RA3-PA19
#
# Definition of Time (Amendment) Ordinance, 1942 (No. 5 of 1942) [1942-06-27]
# Ordinances of British Honduras Passed in the Year 1942, p 31-32
# https://books.google.com/books?id=h6MpAQAAMAAJ&pg=RA6-PA95-IA44
#
# Definition of Time Ordinance, 1945 (No. 19 of 1945) [1945-12-15]
# Ordinances of British Honduras Passed in the Year 1945, p 49-50
# https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA2-PP1
#
# Definition of Time Ordinance, 1947 (No. 1 of 1947) [1947-03-11]
# Ordinances of British Honduras Passed in the Year 1947, p 1-2
# https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA3-PA1
#
# Time (Definition of) Ordinance  (Chapter 180)
# The Laws of British Honduras in Force on the 15th Day of September, 1958 , Volume IV, p 2580
# https://books.google.com/books?id=v5QpAQAAMAAJ&pg=PA2580
#
# Time (Definition of) (Amendment) Ordinance, 1968 (No. 13 of 1968) [1968-08-03]
# https://books.google.com/books?id=xij7KEB_58wC&pg=RA1-PA428-IA9
#
# Definition of Time Act (Chapter 339)
# Law of Belize, Revised Edition 2000
# http://www.belizelaw.org/web/lawadmin/PDF%20files/cap339.pdf

# From Paul Eggert (2020-11-03):
# The transitions below are derived from P Chan's sources, except that the
# 1973 through 1983 transitions are from Shanks & Pottenger since we have
# no better data there.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Belize	1918	1941	-	Oct	Sat>=1	24:00	0:30	-0530
Rule	Belize	1919	1942	-	Feb	Sat>=8	24:00	0	CST
Rule	Belize	1942	only	-	Jun	27	24:00	1:00	CWT
Rule	Belize	1945	only	-	Aug	14	23:00u	1:00	CPT
Rule	Belize	1945	only	-	Dec	15	24:00	0	CST
Rule	Belize	1947	1967	-	Oct	Sat>=1	24:00	0:30	-0530
Rule	Belize	1948	1968	-	Feb	Sat>=8	24:00	0	CST
Rule	Belize	1973	only	-	Dec	 5	0:00	1:00	CDT
Rule	Belize	1974	only	-	Feb	 9	0:00	0	CST
Rule	Belize	1982	only	-	Dec	18	0:00	1:00	CDT
Rule	Belize	1983	only	-	Feb	12	0:00	0	CST
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	America/Belize	-5:52:48 -	LMT	1912 Apr  1
			-6:00	Belize	%s

# Bermuda

# From Paul Eggert (2022-07-27):
# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
# Bermuda dockyard, Ireland I.  This agrees with standard offset given in the
# Daylight Saving Act, 1917 cited below.
# It is not known when this time became standard for Bermuda; guess 1890.
# The transition to -04 was specified by:
# 1930: The Time Zone Act, 1929 (1929: No. 39) [1929-11-08]
# https://books.google.com/books?id=7tdMAQAAIAAJ&pg=RA54-PP1

# From P Chan (2020-11-20):
# Most of the information can be found online from the Bermuda National
# Library - Digital Collection which includes The Royal Gazette (RG) until 1957
# https://bnl.contentdm.oclc.org/digital/
# I will cite the ID.  For example, [10000] means
# https://bnl.contentdm.oclc.org/digital/collection/BermudaNP02/id/10000
#
# 1917: Apr 5 midnight to Sep 30 midnight
# Daylight Saving Act, 1917 (1917 No. 13) [1917-04-02]
# Bermuda Acts and Resolves 1917, p 37-38
# https://books.google.com/books?id=M-lCAQAAMAAJ&pg=PA36-IA2
# RG, 1917-04-04, p 6 [42340] gives the spring forward date.
#
# 1918: Apr 13 midnight to Sep 15 midnight
# Daylight Saving Act, 1918 (1918 No. 9) [1918-04-06]
# Bermuda Acts and Resolves 1917, p 13
# https://books.google.com/books?id=K-lCAQAAMAAJ&pg=RA1-PA7
#
# Note that local mean time was still used before 1930.
#
# During WWII, DST was introduced by Defence Regulations
# 1942: Jan 11 02:00 to Oct 18 02:00 [113646], [115726]
# 1943: Mar 21 02:00 to Oct 31 02:00 [116704], [118193]
# 1944: Mar 12 02:00 to Nov 5 02:00 [119225], [121593]
# 1945: Mar 11 02:00 to Nov 4 02:00 [122369], [124461]
# RG, 1942-01-08, p 2, 1942-10-12, p 2 , 1943-03-06, p 2, 1943-09-03, p 1,
# 1944-02-29, p 6, 1944-09-20, p 2, 1945-02-13, p 2, 1945-11-03, p 1
#
# In 1946, the House of Assembly rejected DST twice. [128686], [128076]
# RG, 1946-03-16 p 1,1946-04-13 p 1
#
# 1947: third Sunday in May 02:00 to second Sunday in September 02:00
# DST in 1947 was defined in the Daylight Saving Act, 1947 (1947: No. 12)
# which expired at the end of the year.  [125784] ,[132405], [144454], [138226]
# RG, 1947-02-27, p 1, 1947-05-15, p 1, 1947-09-13, p 1, 1947-12-30, p 1
#
# 1948-1952: fourth Sunday in May 02:00 to first Sunday in September 02:00
# DST in 1948 was defined in the Daylight Saving Act, 1948 (1948 : No. 12)
# which was set to expired at the end of the year but it was extended until
# the end of 1952 and was not further extended.
# [129802], [139403], [146008], [135240], [144330], [139049], [143309],
# [148271], [149773], [153589], [153802], [155924]
# RG, 1948-04-13, p 1, 1948-05-22, p 1, 1948-09-04, p 1, 1949-05-21, p1,
# 1949-09-03, p 1, 1950-05-27 p 1, 1950-09-02, p 1, 1951-05-27, p 1,
# 1951-09-01, p 1, 1952-05-23, p 1, 1952-09-26, p 1, 1952-12-21, p 8
#
# In 1953-1955, the House of Assembly rejected DST each year. [158996],
# [162620], [166720] RG, 1953-05-02, p 1, 1954-04-01 p 1, 1955-03-12, p 1
#
# 1956: fourth Sunday in May 02:00 to last Sunday in October 02:00
# Time Zone (Seasonal Variation) Act, 1956 (1956: No.44) [1956-05-25]
# Bermuda Public Acts 1956, p 331-332
# https://books.google.com/books?id=Xs1AlmD_cEwC&pg=PA63
#
# The extension of the Act was rejected by the House of Assembly. [176218]
# RG, 1956-12-13, p 1
#
# From the Chronological Table of Public and Private Acts up to 1985, it seems
# that there does not exist other Acts related to DST before 1973.
# https://books.google.com/books?id=r9hMAQAAIAAJ&pg=RA23-PA1
# Public Acts of the Legislature of the Islands of Bermuda, Together with
# Statutory Instruments in Force Thereunder, Vol VII

# From Dan Jones, reporting in The Royal Gazette (2006-06-26):
# Next year, however, clocks in the US will go forward on the second Sunday
# in March, until the first Sunday in November.  And, after the Time Zone
# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
# Friday, the same thing will happen in Bermuda.
# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Bermuda	1917	only	-	Apr	 5	24:00	1:00	-
Rule	Bermuda	1917	only	-	Sep	30	24:00	0	-
Rule	Bermuda	1918	only	-	Apr	13	24:00	1:00	-
Rule	Bermuda	1918	only	-	Sep	15	24:00	0	S
Rule	Bermuda	1942	only	-	Jan	11	 2:00	1:00	D
Rule	Bermuda	1942	only	-	Oct	18	 2:00	0	S
Rule	Bermuda	1943	only	-	Mar	21	 2:00	1:00	D
Rule	Bermuda	1943	only	-	Oct	31	 2:00	0	S
Rule	Bermuda	1944	1945	-	Mar	Sun>=8	 2:00	1:00	D
Rule	Bermuda	1944	1945	-	Nov	Sun>=1	 2:00	0	S
Rule	Bermuda	1947	only	-	May	Sun>=15	 2:00	1:00	D
Rule	Bermuda	1947	only	-	Sep	Sun>=8	 2:00	0	S
Rule	Bermuda	1948	1952	-	May	Sun>=22	 2:00	1:00	D
Rule	Bermuda	1948	1952	-	Sep	Sun>=1	 2:00	0	S
Rule	Bermuda	1956	only	-	May	Sun>=22	 2:00	1:00	D
Rule	Bermuda	1956	only	-	Oct	lastSun	 2:00	0	S

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
		#STDOFF	-4:19:18.3
Zone Atlantic/Bermuda	-4:19:18 -	LMT	1890	# Hamilton
			-4:19:18 Bermuda BMT/BST 1930 Jan 1  2:00
			-4:00	Bermuda	A%sT	1974 Apr 28  2:00
			-4:00	Canada	A%sT	1976
			-4:00	US	A%sT

# Costa Rica

# Milne gives -5:36:13.3 as San José mean time.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	CR	1979	1980	-	Feb	lastSun	0:00	1:00	D
Rule	CR	1979	1980	-	Jun	Sun>=1	0:00	0	S
Rule	CR	1991	1992	-	Jan	Sat>=15	0:00	1:00	D
# IATA SSIM (1991-09) says the following was at 1:00;
# go with Shanks & Pottenger.
Rule	CR	1991	only	-	Jul	 1	0:00	0	S
Rule	CR	1992	only	-	Mar	15	0:00	0	S
# There are too many San Josés elsewhere, so we'll use 'Costa Rica'.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
		#STDOFF	-5:36:13.3
Zone America/Costa_Rica	-5:36:13 -	LMT	1890        # San José
			-5:36:13 -	SJMT	1921 Jan 15 # San José Mean Time
			-6:00	CR	C%sT
# Coco
# no information; probably like America/Costa_Rica

# Cuba

# From Paul Eggert (2013-02-21):
# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57
# for the port, and -5:30 for meteorological observations.
# For now, stick with Shanks & Pottenger.

# From Arthur David Olson (1999-03-29):
# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
# the Cuban National Team and the Baltimore Orioles was carried live on
# the Orioles Radio Network, including affiliate WTOP in Washington, DC.
# During the game, play-by-play announcer Jim Hunter noted that
# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
# Time today."  (The "two hour" remark referred to losing one hour of
# sleep on 1999-03-28 - when the announcers were in Cuba as it switched
# to DST - and one more hour on 1999-04-04 - when the announcers will have
# returned to Baltimore, which switches on that date.)

# From Steffen Thorsen (2013-11-11):
# DST start in Cuba in 2004 ... does not follow the same rules as the
# years before.  The correct date should be Sunday 2004-03-28 00:00 ...
# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html

# From Evert van der Veer via Steffen Thorsen (2004-10-28):
# Cuba is not going back to standard time this year.
# From Paul Eggert (2006-03-22):
# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
# says that it's due to a problem at the Antonio Guiteras
# thermoelectric plant, and says "This October there will be no return
# to normal hours (after daylight saving time)".
# For now, let's assume that it's a temporary measure.

# From Carlos A. Carnero Delgado (2005-11-12):
# This year (just like in 2004-2005) there's no change in time zone
# adjustment in Cuba.  We will stay in daylight saving time:
# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html

# From Jesper Nørgaard Welen (2006-10-21):
# An article in GRANMA INTERNACIONAL claims that Cuba will end
# the 3 years of permanent DST next weekend, see
# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
# "On Saturday night, October 28 going into Sunday, October 29, at 01:00,
# watches should be set back one hour - going back to 00:00 hours - returning
# to the normal schedule....

# From Paul Eggert (2007-03-02):
# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday,
# says Cuban clocks will advance at midnight on March 10.
# For lack of better information, assume Cuba will use US rules,
# except that it switches at midnight standard time as usual.
#
# From Steffen Thorsen (2007-10-25):
# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week
# earlier - on the last Sunday of October, just like in 2006.
#
# He supplied these references:
#
# http://www.prensalatina.com.mx/article.asp?ID={4CC32C1B-A9F7-42FB-8A07-8631AFC923AF}&language=ES
# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm
#
# From Alex Krivenyshev (2007-10-25):
# Here is also article from Granma (Cuba):
#
# Regirá el Horario Normal desde el próximo domingo 28 de octubre
# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html
#
# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html

# From Arthur David Olson (2008-03-09):
# I'm in Maryland which is now observing United States Eastern Daylight
# Time. At 9:44 local time I used RealPlayer to listen to
# http://media.enet.cu/radioreloj
# a Cuban information station, and heard
# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),
# indicating that Cuba is still on standard time.

# From Steffen Thorsen (2008-03-12):
# It seems that Cuba will start DST on Sunday, 2007-03-16...
# It was announced yesterday, according to this source (in Spanish):
# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
#
# Some more background information is posted here:
# https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
#
# The article also says that Cuba has been observing DST since 1963,
# while Shanks (and tzdata) has 1965 as the first date (except in the
# 1940's). Many other web pages in Cuba also claim that it has been
# observed since 1963, but with the exception of 1970 - an exception
# which is not present in tzdata/Shanks. So there is a chance we need to
# change some historic records as well.
#
# One example:
# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm

# From Jesper Nørgaard Welen (2008-03-13):
# The Cuban time change has just been confirmed on the most authoritative
# web site, the Granma.  Please check out
# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html
#
# Basically as expected after Steffen Thorsen's information, the change
# will take place midnight between Saturday and Sunday.

# From Arthur David Olson (2008-03-12):
# Assume Sun>=15 (third Sunday) going forward.

# From Alexander Krivenyshev (2009-03-04)
# According to the Radio Reloj - Cuba will start Daylight Saving Time on
# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-
# not on midnight March 14 / March 15 as previously thought.
#
# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html
# (in Spanish)

# From Arthur David Olson (2009-03-09)
# I listened over the Internet to
# http://media.enet.cu/readioreloj
# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the
# the time was announced as "diez cinco" - the same time as here, indicating
# that has indeed switched to DST. Assume second Sunday from 2009 forward.

# From Steffen Thorsen (2011-03-08):
# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00
# this year. Nothing about the end date known so far (if that has
# changed at all).
#
# Source:
# http://granma.co.cu/2011/03/08/nacional/artic01.html
#
# Our info:
# https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
#
# From Steffen Thorsen (2011-10-30)
# Cuba will end DST two weeks later this year. Instead of going back
# tonight, it has been delayed to 2011-11-13 at 01:00.
#
# One source (Spanish)
# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html
#
# Our page:
# https://www.timeanddate.com/news/time/cuba-time-changes-2011.html
#
# From Steffen Thorsen (2012-03-01)
# According to Radio Reloj, Cuba will start DST on Midnight between March
# 31 and April 1.
#
# Radio Reloj has the following info (Spanish):
# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril
#
# Our info on it:
# https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html

# From Steffen Thorsen (2012-11-03):
# Radio Reloj and many other sources report that Cuba is changing back
# to standard time on 2012-11-04:
# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre
# From Paul Eggert (2012-11-03):
# For now, assume the future rule is first Sunday in November.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Cuba	1928	only	-	Jun	10	0:00	1:00	D
Rule	Cuba	1928	only	-	Oct	10	0:00	0	S
Rule	Cuba	1940	1942	-	Jun	Sun>=1	0:00	1:00	D
Rule	Cuba	1940	1942	-	Sep	Sun>=1	0:00	0	S
Rule	Cuba	1945	1946	-	Jun	Sun>=1	0:00	1:00	D
Rule	Cuba	1945	1946	-	Sep	Sun>=1	0:00	0	S
Rule	Cuba	1965	only	-	Jun	1	0:00	1:00	D
Rule	Cuba	1965	only	-	Sep	30	0:00	0	S
Rule	Cuba	1966	only	-	May	29	0:00	1:00	D
Rule	Cuba	1966	only	-	Oct	2	0:00	0	S
Rule	Cuba	1967	only	-	Apr	8	0:00	1:00	D
Rule	Cuba	1967	1968	-	Sep	Sun>=8	0:00	0	S
Rule	Cuba	1968	only	-	Apr	14	0:00	1:00	D
Rule	Cuba	1969	1977	-	Apr	lastSun	0:00	1:00	D
Rule	Cuba	1969	1971	-	Oct	lastSun	0:00	0	S
Rule	Cuba	1972	1974	-	Oct	8	0:00	0	S
Rule	Cuba	1975	1977	-	Oct	lastSun	0:00	0	S
Rule	Cuba	1978	only	-	May	7	0:00	1:00	D
Rule	Cuba	1978	1990	-	Oct	Sun>=8	0:00	0	S
Rule	Cuba	1979	1980	-	Mar	Sun>=15	0:00	1:00	D
Rule	Cuba	1981	1985	-	May	Sun>=5	0:00	1:00	D
Rule	Cuba	1986	1989	-	Mar	Sun>=14	0:00	1:00	D
Rule	Cuba	1990	1997	-	Apr	Sun>=1	0:00	1:00	D
Rule	Cuba	1991	1995	-	Oct	Sun>=8	0:00s	0	S
Rule	Cuba	1996	only	-	Oct	 6	0:00s	0	S
Rule	Cuba	1997	only	-	Oct	12	0:00s	0	S
Rule	Cuba	1998	1999	-	Mar	lastSun	0:00s	1:00	D
Rule	Cuba	1998	2003	-	Oct	lastSun	0:00s	0	S
Rule	Cuba	2000	2003	-	Apr	Sun>=1	0:00s	1:00	D
Rule	Cuba	2004	only	-	Mar	lastSun	0:00s	1:00	D
Rule	Cuba	2006	2010	-	Oct	lastSun	0:00s	0	S
Rule	Cuba	2007	only	-	Mar	Sun>=8	0:00s	1:00	D
Rule	Cuba	2008	only	-	Mar	Sun>=15	0:00s	1:00	D
Rule	Cuba	2009	2010	-	Mar	Sun>=8	0:00s	1:00	D
Rule	Cuba	2011	only	-	Mar	Sun>=15	0:00s	1:00	D
Rule	Cuba	2011	only	-	Nov	13	0:00s	0	S
Rule	Cuba	2012	only	-	Apr	1	0:00s	1:00	D
Rule	Cuba	2012	max	-	Nov	Sun>=1	0:00s	0	S
Rule	Cuba	2013	max	-	Mar	Sun>=8	0:00s	1:00	D

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	America/Havana	-5:29:28 -	LMT	1890
			-5:29:36 -	HMT	1925 Jul 19 12:00 # Havana MT
			-5:00	Cuba	C%sT

# Dominican Republic

# From Steffen Thorsen (2000-10-30):
# Enrique Morales reported to me that the Dominican Republic has changed the
# time zone to Eastern Standard Time as of Sunday 29 at 2 am....
# http://www.listin.com.do/antes/261000/republica/princi.html

# From Paul Eggert (2000-12-04):
# That URL (2000-10-26, in Spanish) says they planned to use US-style DST.

# From Rives McDow (2000-12-01):
# Dominican Republic changed its mind and presidential decree on Tuesday,
# November 28, 2000, with a new decree.  On Sunday, December 3 at 1:00 AM the
# Dominican Republic will be reverting to 8 hours from the International Date
# Line, and will not be using DST in the foreseeable future.  The reason they
# decided to use DST was to be in synch with Puerto Rico, who was also going
# to implement DST.  When Puerto Rico didn't implement DST, the president
# decided to revert.


# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	DR	1966	only	-	Oct	30	0:00	1:00	EDT
Rule	DR	1967	only	-	Feb	28	0:00	0	EST
Rule	DR	1969	1973	-	Oct	lastSun	0:00	0:30	-0430
Rule	DR	1970	only	-	Feb	21	0:00	0	EST
Rule	DR	1971	only	-	Jan	20	0:00	0	EST
Rule	DR	1972	1974	-	Jan	21	0:00	0	EST
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Santo_Domingo -4:39:36 -	LMT	1890
			-4:40	-	SDMT	1933 Apr  1 12:00 # S. Dom. MT
			-5:00	DR	%s	1974 Oct 27
			-4:00	-	AST	2000 Oct 29  2:00
			-5:00	US	E%sT	2000 Dec  3  1:00
			-4:00	-	AST

# El Salvador

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Salv	1987	1988	-	May	Sun>=1	0:00	1:00	D
Rule	Salv	1987	1988	-	Sep	lastSun	0:00	0	S
# There are too many San Salvadors elsewhere, so use America/El_Salvador
# instead of America/San_Salvador.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/El_Salvador -5:56:48 -	LMT	1921 # San Salvador
			-6:00	Salv	C%sT

# Guatemala
#
# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
# Diario Co Latino, at
# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>,
# says in an article dated 2006-04-19 that the Guatemalan government had
# decided on that date to advance official time by 60 minutes, to lessen the
# impact of the elevated cost of oil....  Daylight saving time will last from
# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
# From Paul Eggert (2006-06-22):
# The Ministry of Energy and Mines, press release CP-15/2006
# (2006-04-19), says DST ends at 24:00.  See
# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Guat	1973	only	-	Nov	25	0:00	1:00	D
Rule	Guat	1974	only	-	Feb	24	0:00	0	S
Rule	Guat	1983	only	-	May	21	0:00	1:00	D
Rule	Guat	1983	only	-	Sep	22	0:00	0	S
Rule	Guat	1991	only	-	Mar	23	0:00	1:00	D
Rule	Guat	1991	only	-	Sep	 7	0:00	0	S
Rule	Guat	2006	only	-	Apr	30	0:00	1:00	D
Rule	Guat	2006	only	-	Oct	 1	0:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Guatemala	-6:02:04 -	LMT	1918 Oct 5
			-6:00	Guat	C%sT

# Haiti
# From Gwillim Law (2005-04-15):
# Risto O. Nykänen wrote me that Haiti is now on DST.
# I searched for confirmation, and I found a press release
# on the Web page of the Haitian Consulate in Chicago (2005-03-31),
# <http://www.haitianconsulate.org/time.doc>.  Translated from French, it says:
#
#  "The Prime Minister's Communication Office notifies the public in general
#   and the press in particular that, following a decision of the Interior
#   Ministry and the Territorial Collectivities [I suppose that means the
#   provinces], Haiti will move to Eastern Daylight Time in the night from next
#   Saturday the 2nd to Sunday the 3rd.
#
#  "Consequently, the Prime Minister's Communication Office wishes to inform
#   the population that the country's clocks will be set forward one hour
#   starting at midnight.  This provision will hold until the last Saturday in
#   October 2005.
#
#  "Port-au-Prince, March 31, 2005"
#
# From Steffen Thorsen (2006-04-04):
# I have been informed by users that Haiti observes DST this year like
# last year, so the current "only" rule for 2005 might be changed to a
# "max" rule or to last until 2006. (Who knows if they will observe DST
# next year or if they will extend their DST like US/Canada next year).
#
# I have found this article about it (in French):
# http://www.haitipressnetwork.com/news.cfm?articleID=7612
#
# The reason seems to be an energy crisis.

# From Stephen Colebourne (2007-02-22):
# Some IATA info: Haiti won't be having DST in 2007.

# From Steffen Thorsen (2012-03-11):
# According to several news sources, Haiti will observe DST this year,
# apparently using the same start and end date as USA/Canada.
# So this means they have already changed their time.
#
# http://www.alterpresse.org/spip.php?article12510
# http://radiovision2000haiti.net/home/?p=13253
#
# From Arthur David Olson (2012-03-11):
# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to
# 3:00 a.m. rather than the traditional Haitian jump at midnight.
# Assume a US-style fall back as well.

# From Steffen Thorsen (2013-03-10):
# It appears that Haiti is observing DST this year as well, same rules
# as US/Canada.  They did it last year as well, and it looks like they
# are going to observe DST every year now...
#
# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/
# http://www.canalplushaiti.net/?p=6714

# From Steffen Thorsen (2016-03-12):
# Jean Antoine, editor of www.haiti-reference.com informed us that Haiti
# are not going on DST this year.  Several other resources confirm this: ...
# https://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html
# https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/
# http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/

# From Steffen Thorsen (2017-03-12):
# We have received 4 mails from different people telling that Haiti
# has started DST again today, and this source seems to confirm that,
# I have not been able to find a more authoritative source:
# https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Haiti	1983	only	-	May	8	0:00	1:00	D
Rule	Haiti	1984	1987	-	Apr	lastSun	0:00	1:00	D
Rule	Haiti	1983	1987	-	Oct	lastSun	0:00	0	S
# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
# Go with IATA.
Rule	Haiti	1988	1997	-	Apr	Sun>=1	1:00s	1:00	D
Rule	Haiti	1988	1997	-	Oct	lastSun	1:00s	0	S
Rule	Haiti	2005	2006	-	Apr	Sun>=1	0:00	1:00	D
Rule	Haiti	2005	2006	-	Oct	lastSun	0:00	0	S
Rule	Haiti	2012	2015	-	Mar	Sun>=8	2:00	1:00	D
Rule	Haiti	2012	2015	-	Nov	Sun>=1	2:00	0	S
Rule	Haiti	2017	max	-	Mar	Sun>=8	2:00	1:00	D
Rule	Haiti	2017	max	-	Nov	Sun>=1	2:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Port-au-Prince -4:49:20 -	LMT	1890
			-4:49	-	PPMT	1917 Jan 24 12:00 # P-a-P MT
			-5:00	Haiti	E%sT

# Honduras
# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.

# From Paul Eggert (2006-05-05):
# worldtimezone.com reports a 2006-05-02 Spanish-language AP article
# saying Honduras will start using DST midnight Saturday, effective 4
# months until September.  La Tribuna reported today
# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
# of Honduras, refused to back down on this.

# From Jesper Nørgaard Welen (2006-08-08):
# It seems that Honduras has returned from DST to standard time this Monday at
# 00:00 hours (prolonging Sunday to 25 hours duration).
# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html

# From Paul Eggert (2006-08-08):
# Also see Diario El Heraldo, The country returns to standard time (2006-08-08).
# http://www.elheraldo.hn/nota.php?nid=54941&sec=12
# It mentions executive decree 18-2006.

# From Steffen Thorsen (2006-08-17):
# Honduras will observe DST from 2007 to 2009, exact dates are not
# published, I have located this authoritative source:
# http://www.presidencia.gob.hn/noticia.aspx?nId=47

# From Steffen Thorsen (2007-03-30):
# http://www.laprensahn.com/pais_nota.php?id04962=7386
# So it seems that Honduras will not enter DST this year....

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Hond	1987	1988	-	May	Sun>=1	0:00	1:00	D
Rule	Hond	1987	1988	-	Sep	lastSun	0:00	0	S
Rule	Hond	2006	only	-	May	Sun>=1	0:00	1:00	D
Rule	Hond	2006	only	-	Aug	Mon>=1	0:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Tegucigalpa -5:48:52 -	LMT	1921 Apr
			-6:00	Hond	C%sT
#
# Great Swan I ceded by US to Honduras in 1972

# Jamaica
# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
# unspecified official document, and says "This time is used throughout the
# island".  Go with Milne.
#
# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
# Lance Neita writes that Prime Minister Michael Manley decreed it January 5.
# Assume Neita meant Jan 6 02:00, the same as the US.  Neita also writes that
# Manley's supporters associated this act with Manley's nickname "Joshua"
# (recall that in the Bible the sun stood still at Joshua's request),
# and with the Rod of Correction which Manley said he had received from
# Haile Selassie, Emperor of Ethiopia.  See:
# Neita L. The politician in all of us. Jamaica Observer 2014-09-20
# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
#
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
		#STDOFF	-5:07:10.41
Zone	America/Jamaica	-5:07:10 -	LMT	1890        # Kingston
			-5:07:10 -	KMT	1912 Feb    # Kingston Mean Time
			-5:00	-	EST	1974
			-5:00	US	E%sT	1984
			-5:00	-	EST

# Martinique
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Martinique	-4:04:20 -      LMT	1890        # Fort-de-France
			-4:04:20 -	FFMT	1911 May  1 # Fort-de-France MT
			-4:00	-	AST	1980 Apr  6
			-4:00	1:00	ADT	1980 Sep 28
			-4:00	-	AST

# Nicaragua
#
# This uses Shanks & Pottenger for times before 2005.
#
# From Steffen Thorsen (2005-04-12):
# I've got reports from 8 different people that Nicaragua just started
# DST on Sunday 2005-04-10, in order to save energy because of
# expensive petroleum.  The exact end date for DST is not yet
# announced, only "September" but some sites also say "mid-September".
# Some background information is available on the President's official site:
# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
# The Decree, no 23-2005 is available here:
# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf
#
# From Paul Eggert (2005-05-01):
# The decree doesn't say anything about daylight saving, but for now let's
# assume that it is daylight saving....
#
# From Gwillim Law (2005-04-21):
# The Associated Press story on the time change, which can be found at
# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
# and elsewhere, says (fifth paragraph, translated from Spanish): "The last
# time that a change of clocks was applied to save energy was in the year 2000
# during the Arnoldo Alemán administration."...
# The northamerica file says that Nicaragua has been on UTC-6 continuously
# since December 1998.  I wasn't able to find any details of Nicaraguan time
# changes in 2000.  Perhaps a note could be added to the northamerica file, to
# the effect that we have indirect evidence that DST was observed in 2000.
#
# From Jesper Nørgaard Welen (2005-11-02):
# Nicaragua left DST the 2005-10-02 at 00:00 (local time).
# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
# (2005-09-26)
#
# From Jesper Nørgaard Welen (2006-05-05):
# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
# (my informal translation)
# By order of the president of the republic, Enrique Bolaños, Nicaragua
# advanced by sixty minutes their official time, yesterday at 2 in the
# morning, and will stay that way until 30th of September.
#
# From Jesper Nørgaard Welen (2006-09-30):
# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
# My informal translation runs:
# The natural sun time is restored in all the national territory, in that the
# time is returned one hour at 01:00 am of October 1 of 2006.
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Nic	1979	1980	-	Mar	Sun>=16	0:00	1:00	D
Rule	Nic	1979	1980	-	Jun	Mon>=23	0:00	0	S
Rule	Nic	2005	only	-	Apr	10	0:00	1:00	D
Rule	Nic	2005	only	-	Oct	Sun>=1	0:00	0	S
Rule	Nic	2006	only	-	Apr	30	2:00	1:00	D
Rule	Nic	2006	only	-	Oct	Sun>=1	1:00	0	S
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	America/Managua	-5:45:08 -	LMT	1890
			-5:45:12 -	MMT	1934 Jun 23 # Managua Mean Time?
			-6:00	-	CST	1973 May
			-5:00	-	EST	1975 Feb 16
			-6:00	Nic	C%sT	1992 Jan  1  4:00
			-5:00	-	EST	1992 Sep 24
			-6:00	-	CST	1993
			-5:00	-	EST	1997
			-6:00	Nic	C%sT

# Cayman Is
# Panama
#
# Atikokan and Coral Harbour, Canada, match Panama since 1970.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	America/Panama	-5:18:08 -	LMT	1890
			-5:19:36 -	CMT	1908 Apr 22 # Colón Mean Time
			-5:00	-	EST

# Anguilla
# Antigua & Barbuda
# Aruba
# Caribbean Netherlands
# Curaçao
# Dominica
# Grenada
# Guadeloupe
# Montserrat
# Puerto Rico
# St Barthélemy
# St Kitts-Nevis
# Sint Maarten / St Martin
# St Lucia
# St Vincent & the Grenadines
# Trinidad & Tobago
# Virgin Is (UK & US)
#
# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Puerto_Rico -4:24:25 -	LMT	1899 Mar 28 12:00 # San Juan
			-4:00	-	AST	1942 May  3
			-4:00	US	A%sT	1946
			-4:00	-	AST

# St Pierre and Miquelon
# There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Miquelon	-3:44:40 -	LMT	1911 Jun 15 # St Pierre
			-4:00	-	AST	1980 May
			-3:00	-	%z	1987
			-3:00	Canada	%z

# Turks and Caicos
#
# From Chris Dunn in
# https://bugs.debian.org/415007
# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
# daylight saving dates for time changes have been adjusted to match
# the recent U.S. change of dates.
#
# From Brian Inglis (2007-04-28):
# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
# rows before that there is an out of date entry for Oct:
# "Eastern Standard Times Begins 2007
# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
# indicating that the normal ET rules are followed.

# From Paul Eggert (2014-08-19):
# The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round.  See:
# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
# Model this as a switch from EST/EDT to AST ...
# From Chris Walton (2014-11-04):
# ... the TCI government appears to have delayed the switch to
# "permanent daylight saving time" by one year....
# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
#
# From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen:
# ... agreed to the reintroduction in TCI of Daylight Saving Time (DST)
# during the summer months and Standard Time, also known as Local
# Time, during the winter months with effect from April 2018 ...
# https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3
# From Paul Eggert (2017-08-26):
# The date of effect of the spring 2018 change appears to be March 11,
# which makes more sense.  See: Hamilton D. Time change back
# by March 2018 for TCI. Magnetic Media. 2017-08-25.
# http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/
#
# From P Chan (2020-11-27):
# Standard Time Declaration Order 2015 (L.N. 15/2015)
# http://online.fliphtml5.com/fizd/czin/#p=2
#
# Standard Time Declaration Order 2017 (L.N. 31/2017)
# http://online.fliphtml5.com/fizd/dmcu/#p=2
#
# From Tim Parenti (2020-12-05):
# Although L.N. 31/2017 reads that it "shall come into operation at 2:00 a.m.
# on 11th March 2018", a precise interpretation here poses some problems.  The
# order states that "the standard time to be observed throughout the Turks and
# Caicos Islands shall be the same time zone as the Eastern United States of
# America" and further clarifies "[f]or the avoidance of doubt" that it
# "applies to the Eastern Standard Time as well as any changes thereto for
# Daylight Saving Time."  However, as clocks in Turks and Caicos approached
# 02:00 -04, and thus the declared implementation time, it was still 01:00 EST
# (-05), as DST in the Eastern US would not start until an hour later.
#
# Since it is unlikely that those on the islands switched their clocks twice in
# the span of an hour, we assume instead that the adoption of EDT actually took
# effect once clocks in the Eastern US had sprung forward, from 03:00 -04.
# This discrepancy only affects the time zone abbreviation and DST flag for the
# intervening hour, not wall clock times, as -04 was maintained throughout.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Grand_Turk	-4:44:32 -	LMT	1890
		#STDOFF	-5:07:10.41
			-5:07:10 -	KMT	1912 Feb # Kingston Mean Time
			-5:00	-	EST	1979
			-5:00	US	E%sT	2015 Mar  8  2:00
			-4:00	-	AST	2018 Mar 11  3:00
			-5:00	US	E%sT

# Local Variables:
# coding: utf-8
# End:
# tzdb data for South America and environs

# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.

# This file is by no means authoritative; if you think you know better,
# go ahead and edit the file (and please send any changes to
# tz@iana.org for general use in the future).  For more, please see
# the file CONTRIBUTING in the tz distribution.

# From Paul Eggert (2016-12-05):
#
# Unless otherwise specified, the source for data through 1990 is:
# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
# San Diego: ACS Publications, Inc. (2003).
# Unfortunately this book contains many errors and cites no sources.
#
# Many years ago Gwillim Law wrote that a good source
# for time zone data was the International Air Transport
# Association's Standard Schedules Information Manual (IATA SSIM),
# published semiannually.  Law sent in several helpful summaries
# of the IATA's data after 1990.  Except where otherwise noted,
# IATA SSIM is the source for entries after 1990.
#
# For data circa 1899, a common source is:
# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
# https://www.jstor.org/stable/1774359
#
# These tables use numeric abbreviations like -03 and -0330 for
# integer hour and minute UT offsets.  Although earlier editions used
# alphabetic time zone abbreviations, these abbreviations were
# invented and did not reflect common practice.

###############################################################################

###############################################################################

# Argentina

# From Bob Devine (1988-01-28):
# Argentina: first Sunday in October to first Sunday in April since 1976.
# Double Summer time from 1969 to 1974.  Switches at midnight.

# From U. S. Naval Observatory (1988-01-19):
# ARGENTINA           3 H BEHIND   UTC

# From Hernan G. Otero (1995-06-26):
# I am sending modifications to the Argentine time zone table...
# AR was chosen because they are the ISO letters that represent Argentina.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Arg	1930	only	-	Dec	 1	0:00	1:00	-
Rule	Arg	1931	only	-	Apr	 1	0:00	0	-
Rule	Arg	1931	only	-	Oct	15	0:00	1:00	-
Rule	Arg	1932	1940	-	Mar	 1	0:00	0	-
Rule	Arg	1932	1939	-	Nov	 1	0:00	1:00	-
Rule	Arg	1940	only	-	Jul	 1	0:00	1:00	-
Rule	Arg	1941	only	-	Jun	15	0:00	0	-
Rule	Arg	1941	only	-	Oct	15	0:00	1:00	-
Rule	Arg	1943	only	-	Aug	 1	0:00	0	-
Rule	Arg	1943	only	-	Oct	15	0:00	1:00	-
Rule	Arg	1946	only	-	Mar	 1	0:00	0	-
Rule	Arg	1946	only	-	Oct	 1	0:00	1:00	-
Rule	Arg	1963	only	-	Oct	 1	0:00	0	-
Rule	Arg	1963	only	-	Dec	15	0:00	1:00	-
Rule	Arg	1964	1966	-	Mar	 1	0:00	0	-
Rule	Arg	1964	1966	-	Oct	15	0:00	1:00	-
Rule	Arg	1967	only	-	Apr	 2	0:00	0	-
Rule	Arg	1967	1968	-	Oct	Sun>=1	0:00	1:00	-
Rule	Arg	1968	1969	-	Apr	Sun>=1	0:00	0	-
Rule	Arg	1974	only	-	Jan	23	0:00	1:00	-
Rule	Arg	1974	only	-	May	 1	0:00	0	-
Rule	Arg	1988	only	-	Dec	 1	0:00	1:00	-
#
# From Hernan G. Otero (1995-06-26):
# These corrections were contributed by InterSoft Argentina S.A.,
# obtaining the data from the:
# Talleres de Hidrografía Naval Argentina
# (Argentine Naval Hydrography Institute)
Rule	Arg	1989	1993	-	Mar	Sun>=1	0:00	0	-
Rule	Arg	1989	1992	-	Oct	Sun>=15	0:00	1:00	-
#
# From Hernan G. Otero (1995-06-26):
# From this moment on, the law that mandated the daylight saving
# time corrections was derogated and no more modifications
# to the time zones (for daylight saving) are now made.
#
# From Rives McDow (2000-01-10):
# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
# which did not result in the switch of a time zone, as they stayed 9 hours
# from the International Date Line.
Rule	Arg	1999	only	-	Oct	Sun>=1	0:00	1:00	-
# From Paul Eggert (2007-12-28):
# DST was set to expire on March 5, not March 3, but since it was converted
# to standard time on March 3 it's more convenient for us to pretend that
# it ended on March 3.
Rule	Arg	2000	only	-	Mar	3	0:00	0	-
#
# From Peter Gradelski via Steffen Thorsen (2000-03-01):
# We just checked with our São Paulo office and they say the government of
# Argentina decided not to become one of the countries that go on or off DST.
# So Buenos Aires should be -3 hours from GMT at all times.
#
# From Fabián L. Arce Jofré (2000-04-04):
# The law that claimed DST for Argentina was derogated by President Fernando
# de la Rúa on March 2, 2000, because it would make people spend more energy
# in the winter time, rather than less.  The change took effect on March 3.
#
# From Mariano Absatz (2001-06-06):
# one of the major newspapers here in Argentina said that the 1999
# Timezone Law (which never was effectively applied) will (would?) be
# in effect.... The article is at
# http://ar.clarin.com/diario/2001-06-06/e-01701.htm
# ... The Law itself is "Ley No. 25155", sanctioned on 1999-08-25, enacted
# 1999-09-17, and published 1999-09-21.  The official publication is at:
# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
# Regretfully, you have to subscribe (and pay) for the on-line version....
#
# (2001-06-12):
# the timezone for Argentina will not change next Sunday.
# Apparently it will do so on Sunday 24th....
# http://ar.clarin.com/diario/2001-06-12/s-03501.htm
#
# (2001-06-25):
# Last Friday (yes, the last working day before the date of the change), the
# Senate annulled the 1999 law that introduced the changes later postponed.
# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
# It remains the vote of the Deputies..., but it will be the same....
# This kind of things had always been done this way in Argentina.
# We are still -03:00 all year round in all of the country.
#
# From Steffen Thorsen (2007-12-21):
# A user (Leonardo Chaim) reported that Argentina will adopt DST....
# all of the country (all Zone-entries) are affected.  News reports like
# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
# that Argentina will use DST next year as well, from October to
# March, although exact rules are not given.
#
# From Jesper Nørgaard Welen (2007-12-26)
# The last hurdle of Argentina DST is over, the proposal was approved in
# the lower chamber too (Diputados) with a vote 192 for and 2 against.
# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
# the original scanned proposal, where the dates and the zero hours are
# clear and unambiguous...This is the article about final approval:
# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
#
# From Paul Eggert (2007-12-22):
# For dates after mid-2008, the following rules are my guesses and
# are quite possibly wrong, but are more likely than no DST at all.

# From Alexander Krivenyshev (2008-09-05):
# As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
# Argentina will start DST on Sunday October 19, 2008.
#
# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)

# From Juan Manuel Docile in https://bugs.gentoo.org/240339 (2008-10-07)
# via Rodrigo Severo:
# Argentinian law No. 25.155 is no longer valid.
# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
# The new one is law No. 26.350
# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
# So there is no summer time in Argentina for now.

# From Mariano Absatz (2008-10-20):
# Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST
# in Argentina from 2008-10-19 until 2009-03-15.
# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
#

# Decree 1705/2008 excepting 12 Provinces from applying DST in the summer
# 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La
# Pampa, Neuquén, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego
# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
#
# Press release 235 dated Saturday October 18th, from the Government of the
# Province of Jujuy saying it will not apply DST either (even when it was not
# included in Decree 1705/2008).
# http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc

# From fullinet (2009-10-18):
# As announced in
# http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
# (an official .gob.ar) under title: "Sin Cambio de Hora"
# (English: "No hour change").
#
# "Por el momento, el Gobierno Nacional resolvió no modificar la hora
# oficial, decisión que estaba en estudio para su implementación el
# domingo 18 de octubre. Desde el Ministerio de Planificación se anunció
# que la Argentina hoy, en estas condiciones meteorológicas, no necesita
# la modificación del huso horario, ya que 2009 nos encuentra con
# crecimiento en la producción y distribución energética."

Rule	Arg	2007	only	-	Dec	30	0:00	1:00	-
Rule	Arg	2008	2009	-	Mar	Sun>=15	0:00	0	-
Rule	Arg	2008	only	-	Oct	Sun>=15	0:00	1:00	-

# From Mariano Absatz (2004-05-21):
# Today it was officially published that the Province of Mendoza is changing
# its timezone this winter... starting tomorrow night....
# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
# From Paul Eggert (2004-05-24):
# It's Law No. 7,210.  This change is due to a public power emergency, so for
# now we'll assume it's for this year only.
#
# From Paul Eggert (2018-01-31):
# Hora de verano para la República Argentina
# http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html
# says that standard time in Argentina from 1894-10-31
# to 1920-05-01 was -4:16:48.25.  Go with this more precise value
# over Shanks & Pottenger.  It is upward compatible with Milne, who
# says Córdoba time was -4:16:48.2.

#
# From Mariano Absatz (2004-06-05):
# These media articles from a major newspaper mostly cover the current state:
# http://www.lanacion.com.ar/04/05/27/de_604825.asp
# http://www.lanacion.com.ar/04/05/28/de_605203.asp
#
# The following eight (8) provinces pulled clocks back to UTC-04:00 at
# midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
# Apparently, all nine provinces would go back to UTC-03:00 at the same
# time in October 17th.
#
# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
# Tierra del Fuego, Tucumán.
#
# From Mariano Absatz (2004-06-14):
# ... this weekend, the Province of Tucumán decided it'd go back to UTC-03:00
# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
# annoyance with the change is much higher than the power savings obtained....
#
# From Gwillim Law (2004-06-14):
# http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
#     "The time change in Tierra del Fuego was a conflicted decision from
#   the start.  The government had decreed that the measure would take
#   effect on June 1, but a normative error forced the new time to begin
#   three days earlier, from a Saturday to a Sunday....
# Our understanding was that the change was originally scheduled to take place
# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
# provinces).  Sunday was May 30, only two days earlier.  So the article
# contains a contradiction.  I would give more credence to the Saturday/Sunday
# date than the "three days earlier" phrase, and conclude that Tierra del
# Fuego set its clocks back at 2004-05-30 00:00.
#
# From Steffen Thorsen (2004-10-05):
# The previous law 7210 which changed the province of Mendoza's time zone
# back in May have been modified slightly in a new law 7277, which set the
# new end date to 2004-09-26 (original date was 2004-10-17).
# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
#
# From Mariano Absatz (2004-10-05):
# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
# Sunday, May 30th and Monday, May 31st.  It changed back to UTC-03:00
# at midnight between Saturday, July 24th and Sunday, July 25th....
# http://www.sanjuan.gov.ar/prensa/archivo/000329.html
# http://www.sanjuan.gov.ar/prensa/archivo/000426.html
# http://www.sanjuan.gov.ar/prensa/archivo/000441.html

# From Alex Krivenyshev (2008-01-17):
# Here are articles that Argentina Province San Luis is planning to end DST
# as earlier as upcoming Monday January 21, 2008 or February 2008:
#
# Provincia argentina retrasa reloj y marca diferencia con resto del país
# (Argentine Province delayed clock and mark difference with the rest of the
# country)
# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
#
# Es inminente que en San Luis atrasen una hora los relojes
# (It is imminent in San Luis clocks one hour delay)
# https://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html
# http://www.worldtimezone.com/dst_news/dst_news_argentina02.html

# From Jesper Nørgaard Welen (2008-01-18):
# The page of the San Luis provincial government
# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
# confirms what Alex Krivenyshev has earlier sent to the tz
# emailing list about that San Luis plans to return to standard
# time much earlier than the rest of the country. It also
# confirms that upon request the provinces San Juan and Mendoza
# refused to follow San Luis in this change.
#
# The change is supposed to take place Monday the 21st at 0:00
# hours. As far as I understand it if this goes ahead, we need
# a new timezone for San Luis (although there are also documented
# independent changes in the southamerica file of San Luis in
# 1990 and 1991 which has not been confirmed).

# From Jesper Nørgaard Welen (2008-01-25):
# Unfortunately the below page has become defunct, about the San Luis
# time change. Perhaps because it now is part of a group of pages "Most
# important pages of 2008."
#
# You can use
# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
# instead it seems. Or use "Buscador" from the main page of the San Luis
# government, and fill in "huso" and click OK, and you will get 3 pages
# from which the first one is identical to the above.

# From Mariano Absatz (2008-01-28):
# I can confirm that the Province of San Luis (and so far only that
# province) decided to go back to UTC-3 effective midnight Jan 20th 2008
# (that is, Monday 21st at 0:00 is the time the clocks were delayed back
# 1 hour), and they intend to keep UTC-3 as their timezone all year round
# (that is, unless they change their mind any minute now).
#
# So we'll have to add yet another city to 'southamerica' (I think San
# Luis city is the mos populated city in the Province, so it'd be
# America/Argentina/San_Luis... of course I can't remember if San Luis's
# history of particular changes goes along with Mendoza or San Juan :-(
# (I only remember not being able to collect hard facts about San Luis
# back in 2004, when these provinces changed to UTC-4 for a few days, I
# mailed them personally and never got an answer).

# From Paul Eggert (2014-08-12):
# Unless otherwise specified, data entries are from Shanks & Pottenger through
# 1992, from the IATA otherwise.  As noted below, Shanks & Pottenger say that
# America/Cordoba split into 6 subregions during 1991/1992, one of which
# was America/San_Luis, but we haven't verified this yet so for now we'll
# keep America/Cordoba a single region rather than splitting it into the
# other 5 subregions.

# From Mariano Absatz (2009-03-13):
# Yesterday (with our usual 2-day notice) the Province of San Luis
# decided that next Sunday instead of "staying" @utc-03:00 they will go
# to utc-04:00 until the second Saturday in October...
#
# The press release is at
# http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
# (I couldn't find the decree, but www.sanluis.gov.ar
# is the official page for the Province Government.)
#
# There's also a note in only one of the major national papers ...
# http://www.lanacion.com.ar/nota.asp?nota_id=1107912
#
# The press release says [quick and dirty translation]:
# ... announced that next Sunday, at 00:00, Puntanos (the San Luis
# inhabitants) will have to turn back one hour their clocks
#
# Since then, San Luis will establish its own Province timezone. Thus,
# during 2009, this timezone change will run from 00:00 the third Sunday
# in March until 24:00 of the second Saturday in October.

# From Mariano Absatz (2009-10-16):
# ...the Province of San Luis is a case in itself.
#
# The Law at
# http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
# is ambiguous because establishes a calendar from the 2nd Sunday in
# October at 0:00 thru the 2nd Saturday in March at 24:00 and the
# complement of that starting on the 2nd Sunday of March at 0:00 and
# ending on the 2nd Saturday of March at 24:00.
#
# This clearly breaks every time the 1st of March or October is a Sunday.
#
# IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
# Sunday of October and March.
#
# The problem is that the changes in the rest of the Provinces that did
# change in 2007/2008, were made according to the Federal Law and Decrees
# that did so on the 3rd Sunday of October and March.
#
# In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
# (October 11th) at 0:00.
#
# So I guess a new set of rules, besides "Arg", must be made and the last
# America/Argentina/San_Luis entries should change to use these...
# ...

# From Alexander Krivenyshev (2010-04-09):
# According to news reports from El Diario de la República Province San
# Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time
# after April 11, 2010 - will continue to have same time as rest of
# Argentina (UTC-3) (no DST).
#
# Confirmaron la prórroga del huso horario de verano (Spanish)
# http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
# or (some English translation):
# http://www.worldtimezone.com/dst_news/dst_news_argentina08.html

# From Mariano Absatz (2010-04-12):
# yes...I can confirm this...and given that San Luis keeps calling
# UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
# rules...San Luis is still using "Western ARgentina Time" and it got
# stuck on Summer daylight savings time even though the summer is over.

# From Paul Eggert (2018-01-23):
# Perhaps San Luis operates on the legal fiction that it is at -04
# with perpetual daylight saving time, but ordinary usage typically seems to
# just say it's at -03; see, for example,
# https://es.wikipedia.org/wiki/Hora_oficial_argentina
# We've documented similar situations as being plain changes to
# standard time, so let's do that here too.  This does not change UTC
# offsets, only tm_isdst and the time zone abbreviations.  One minor
# plus is that this silences a zic complaint that there's no POSIX TZ
# setting for timestamps past 2038.

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
#
# Buenos Aires (BA), Capital Federal (CF),
Zone America/Argentina/Buenos_Aires -3:53:48 - LMT	1894 Oct 31
		#STDOFF	-4:16:48.25
			-4:16:48 -	CMT	1920 May    # Córdoba Mean Time
			-4:00	-	%z	1930 Dec
			-4:00	Arg	%z	1969 Oct  5
			-3:00	Arg	%z	1999 Oct  3
			-4:00	Arg	%z	2000 Mar  3
			-3:00	Arg	%z
#
# Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN),
# Chaco (CC), Formosa (FM), Santiago del Estero (SE)
#
# Shanks & Pottenger also make the following claims, which we haven't verified:
# - Formosa switched to -3:00 on 1991-01-07.
# - Misiones switched to -3:00 on 1990-12-29.
# - Chaco switched to -3:00 on 1991-01-04.
# - Santiago del Estero switched to -4:00 on 1991-04-01,
#   then to -3:00 on 1991-04-26.
#
		#STDOFF	       -4:16:48.25
Zone America/Argentina/Cordoba -4:16:48 - LMT	1894 Oct 31
			-4:16:48 -	CMT	1920 May
			-4:00	-	%z	1930 Dec
			-4:00	Arg	%z	1969 Oct  5
			-3:00	Arg	%z	1991 Mar  3
			-4:00	-	%z	1991 Oct 20
			-3:00	Arg	%z	1999 Oct  3
			-4:00	Arg	%z	2000 Mar  3
			-3:00	Arg	%z
#
# Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN)
Zone America/Argentina/Salta -4:21:40 - LMT	1894 Oct 31
		#STDOFF	-4:16:48.25
			-4:16:48 -	CMT	1920 May
			-4:00	-	%z	1930 Dec
			-4:00	Arg	%z	1969 Oct  5
			-3:00	Arg	%z	1991 Mar  3
			-4:00	-	%z	1991 Oct 20
			-3:00	Arg	%z	1999 Oct  3
			-4:00	Arg	%z	2000 Mar  3
			-3:00	Arg	%z	2008 Oct 18
			-3:00	-	%z
#
# Tucumán (TM)
Zone America/Argentina/Tucuman -4:20:52 - LMT	1894 Oct 31
		#STDOFF	-4:16:48.25
			-4:16:48 -	CMT	1920 May
			-4:00	-	%z	1930 Dec
			-4:00	Arg	%z	1969 Oct  5
			-3:00	Arg	%z	1991 Mar  3
			-4:00	-	%z	1991 Oct 20
			-3:00	Arg	%z	1999 Oct  3
			-4:00	Arg	%z	2000 Mar  3
			-3:00	-	%z	2004 Jun  1
			-4:00	-	%z	2004 Jun 13
			-3:00	Arg	%z
#
# La Rioja (LR)
Zone America/Argentina/La_Rioja -4:27:24 - LMT	1894 Oct 31
		#STDOFF	-4:16:48.25
			-4:16:48 -	CMT	1920 May
			-4:00	-	%z	1930 Dec
			-4:00	Arg	%z	1969 Oct  5
			-3:00	Arg	%z	1991 Mar  1
			-4:00	-	%z	1991 May  7
			-3:00	Arg	%z	1999 Oct  3
			-4:00	Arg	%z	2000 Mar  3
			-3:00	-	%z	2004 Jun  1
			-4:00	-	%z	2004 Jun 20
			-3:00	Arg	%z	2008 Oct 18
			-3:00	-	%z
#
# San Juan (SJ)
Zone America/Argentina/San_Juan -4:34:04 - LMT	1894 Oct 31
		#STDOFF	-4:16:48.25
			-4:16:48 -	CMT	1920 May
			-4:00	-	%z	1930 Dec
			-4:00	Arg	%z	1969 Oct  5
			-3:00	Arg	%z	1991 Mar  1
			-4:00	-	%z	1991 May  7
			-3:00	Arg	%z	1999 Oct  3
			-4:00	Arg	%z	2000 Mar  3
			-3:00	-	%z	2004 May 31
			-4:00	-	%z	2004 Jul 25
			-3:00	Arg	%z	2008 Oct 18
			-3:00	-	%z
#
# Jujuy (JY)
Zone America/Argentina/Jujuy -4:21:12 -	LMT	1894 Oct 31
		#STDOFF	-4:16:48.25
			-4:16:48 -	CMT	1920 May
			-4:00	-	%z	1930 Dec
			-4:00	Arg	%z	1969 Oct  5
			-3:00	Arg	%z	1990 Mar  4
			-4:00	-	%z	1990 Oct 28
			-4:00	1:00	%z	1991 Mar 17
			-4:00	-	%z	1991 Oct  6
			-3:00	1:00	%z	1992
			-3:00	Arg	%z	1999 Oct  3
			-4:00	Arg	%z	2000 Mar  3
			-3:00	Arg	%z	2008 Oct 18
			-3:00	-	%z
#
# Catamarca (CT), Chubut (CH)
Zone America/Argentina/Catamarca -4:23:08 - LMT	1894 Oct 31
		#STDOFF	-4:16:48.25
			-4:16:48 -	CMT	1920 May
			-4:00	-	%z	1930 Dec
			-4:00	Arg	%z	1969 Oct  5
			-3:00	Arg	%z	1991 Mar  3
			-4:00	-	%z	1991 Oct 20
			-3:00	Arg	%z	1999 Oct  3
			-4:00	Arg	%z	2000 Mar  3
			-3:00	-	%z	2004 Jun  1
			-4:00	-	%z	2004 Jun 20
			-3:00	Arg	%z	2008 Oct 18
			-3:00	-	%z
#
# Mendoza (MZ)
Zone America/Argentina/Mendoza -4:35:16 - LMT	1894 Oct 31
		#STDOFF	-4:16:48.25
			-4:16:48 -	CMT	1920 May
			-4:00	-	%z	1930 Dec
			-4:00	Arg	%z	1969 Oct  5
			-3:00	Arg	%z	1990 Mar  4
			-4:00	-	%z	1990 Oct 15
			-4:00	1:00	%z	1991 Mar  1
			-4:00	-	%z	1991 Oct 15
			-4:00	1:00	%z	1992 Mar  1
			-4:00	-	%z	1992 Oct 18
			-3:00	Arg	%z	1999 Oct  3
			-4:00	Arg	%z	2000 Mar  3
			-3:00	-	%z	2004 May 23
			-4:00	-	%z	2004 Sep 26
			-3:00	Arg	%z	2008 Oct 18
			-3:00	-	%z
#
# San Luis (SL)

Rule	SanLuis	2008	2009	-	Mar	Sun>=8	0:00	0	-
Rule	SanLuis	2007	2008	-	Oct	Sun>=8	0:00	1:00	-

Zone America/Argentina/San_Luis -4:25:24 - LMT	1894 Oct 31
		#STDOFF	-4:16:48.25
			-4:16:48 -	CMT	1920 May
			-4:00	-	%z	1930 Dec
			-4:00	Arg	%z	1969 Oct  5
			-3:00	Arg	%z	1990
			-3:00	1:00	%z	1990 Mar 14
			-4:00	-	%z	1990 Oct 15
			-4:00	1:00	%z	1991 Mar  1
			-4:00	-	%z	1991 Jun  1
			-3:00	-	%z	1999 Oct  3
			-4:00	1:00	%z	2000 Mar  3
			-3:00	-	%z	2004 May 31
			-4:00	-	%z	2004 Jul 25
			-3:00	Arg	%z	2008 Jan 21
			-4:00	SanLuis	%z	2009 Oct 11
			-3:00	-	%z
#
# Santa Cruz (SC)
Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT	1894 Oct 31
		#STDOFF	-4:16:48.25
			-4:16:48 -	CMT	1920 May
			-4:00	-	%z	1930 Dec
			-4:00	Arg	%z	1969 Oct  5
			-3:00	Arg	%z	1999 Oct  3
			-4:00	Arg	%z	2000 Mar  3
			-3:00	-	%z	2004 Jun  1
			-4:00	-	%z	2004 Jun 20
			-3:00	Arg	%z	2008 Oct 18
			-3:00	-	%z
#
# Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF)
Zone America/Argentina/Ushuaia -4:33:12 - LMT	1894 Oct 31
		#STDOFF	-4:16:48.25
			-4:16:48 -	CMT	1920 May
			-4:00	-	%z	1930 Dec
			-4:00	Arg	%z	1969 Oct  5
			-3:00	Arg	%z	1999 Oct  3
			-4:00	Arg	%z	2000 Mar  3
			-3:00	-	%z	2004 May 30
			-4:00	-	%z	2004 Jun 20
			-3:00	Arg	%z	2008 Oct 18
			-3:00	-	%z

# Bolivia
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	America/La_Paz	-4:32:36 -	LMT	1890
			-4:32:36 -	CMT	1931 Oct 15 # Calamarca MT
			-4:32:36 1:00	BST	1932 Mar 21 # Bolivia ST
			-4:00	-	%z

# Brazil

# From Paul Eggert (1993-11-18):
# The mayor of Rio recently attempted to change the time zone rules
# just in his city, in order to leave more summer time for the tourist trade.
# The rule change lasted only part of the day;
# the federal government refused to follow the city's rules, and business
# was in a chaos, so the mayor backed down that afternoon.

# From IATA SSIM (1996-02):
# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
# Santa Catarina (SC), Paraná (PR), São Paulo (SP), Rio de Janeiro (RJ),
# Espírito Santo (ES), Minas Gerais (MG), Bahia (BA), Goiás (GO),
# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
# [The last three states are new to this issue of the IATA SSIM.]

# From Gwillim Law (1996-10-07):
# Geography, history (Tocantins was part of Goiás until 1989), and other
# sources of time zone information lead me to believe that AL, SE, and TO were
# always in BR1, and so the only change was whether or not they observed DST....
# The earliest issue of the SSIM I have is 2/91.  Each issue from then until
# 9/95 says that DST is observed only in the ten states I quoted from 9/95,
# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
# (UTC-4)....  The other two time zones given for Brazil are BR3, which is
# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
# become part of the state of Pernambuco).  The boundary between BR1 and BR2
# has never been clearly stated.  They've simply been called East and West.
# However, some conclusions can be drawn from another IATA manual: the Airline
# Coding Directory, which lists close to 400 airports in Brazil.  For each
# airport it gives a time zone which is coded to the SSIM.  From that
# information, I'm led to conclude that the states of Amapá (AP), Ceará (CE),
# Maranhão (MA), Paraíba (PR), Pernambuco (PE), Piauí (PI), and Rio Grande do
# Norte (RN), and the eastern part of Pará (PA) are all in BR1 without DST.

# From Marcos Tadeu (1998-09-27):
# Brazilian official page <http://pcdsh01.on.br/verao1.html>

# From Jesper Nørgaard (2000-11-03):
# [For an official list of which regions in Brazil use which time zones, see:]
# http://pcdsh01.on.br/Fusbr.htm
# http://pcdsh01.on.br/Fusbrhv.htm

# From Celso Doria via David Madeo (2002-10-09):
# The reason for the delay this year has to do with elections in Brazil.
#
# Unlike in the United States, elections in Brazil are 100% computerized and
# the results are known almost immediately.  Yesterday, it was the first
# round of the elections when 115 million Brazilians voted for President,
# Governor, Senators, Federal Deputies, and State Deputies.  Nobody is
# counting (or re-counting) votes anymore and we know there will be a second
# round for the Presidency and also for some Governors.  The 2nd round will
# take place on October 27th.
#
# The reason why the DST will only begin November 3rd is that the thousands
# of electoral machines used cannot have their time changed, and since the
# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
# the Government decided to postpone DST, instead of changing the Constitution
# (maybe, for the next elections, it will be possible to change the clock)...

# From Rodrigo Severo (2004-10-04):
# It's just the biannual change made necessary by the much hyped, supposedly
# modern Brazilian ... voting machines which, apparently, can't deal
# with a time change between the first and the second rounds of the elections.

# From Steffen Thorsen (2007-09-20):
# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975

# From Paul Schulze (2008-06-24):
# ...by law number 11.662 of April 24, 2008 (published in the "Diario
# Oficial da União"...) in Brazil there are changes in the timezones,
# effective today (00:00am at June 24, 2008) as follows:
#
# a) The timezone UTC+5 is extinguished, with all the Acre state and the
# part of the Amazonas state that had this timezone now being put to the
# timezone UTC+4
# b) The whole Pará state now is put at timezone UTC+3, instead of just
# part of it, as was before.
#
# This change follows a proposal of senator Tiao Viana of Acre state, that
# proposed it due to concerns about open television channels displaying
# programs inappropriate to youths in the states that had the timezone
# UTC+5 too early in the night. In the occasion, some more corrections
# were proposed, trying to unify the timezones of any given state. This
# change modifies timezone rules defined in decree 2.784 of 18 June,
# 1913.

# From Rodrigo Severo (2008-06-24):
# Just correcting the URL:
# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
#
# As a result of the above Decree I believe the America/Rio_Branco
# timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
# be created to represent the...west side of the Pará State. I
# suggest this new timezone be called Santarem as the most
# important/populated city in the affected area.
#
# This new timezone would be the same as the Rio_Branco timezone up to
# the 2008/06/24 change which would be to UTC-3 instead of UTC-4.

# From Alex Krivenyshev (2008-06-24):
# This is a quick reference page for New and Old Brazil Time Zones map.
# http://www.worldtimezone.com/brazil-time-new-old.php
#
# - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05
# (state Acre and the part of the Amazonas will be UTC/GMT-04) - western
# part of Par state is moving to one timezone UTC-03 (from UTC-04).

# From Paul Eggert (2002-10-10):
# The official decrees referenced below are mostly taken from
# Decretos sobre o Horário de Verão no Brasil.
# http://pcdsh01.on.br/DecHV.html

# From Steffen Thorsen (2008-08-29):
# As announced by the government and many newspapers in Brazil late
# yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
# it will end on 2009-02-15 (current rule for Brazil is fine). Based on
# past years experience with the elections, there was a good chance that
# the start was postponed to November, but it did not happen this year.
#
# It has not yet been posted to http://pcdsh01.on.br/DecHV.html
#
# An official page about it:
# http://www.mme.gov.br/site/news/detail.do?newsId=16722
# Note that this link does not always work directly, but must be accessed
# by going to
# http://www.mme.gov.br/first
#
# One example link that works directly:
# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
# (Portuguese)
#
# We have a written a short article about it as well:
# https://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
#
# From Alexander Krivenyshev (2011-10-04):
# State Bahia will return to Daylight savings time this year after 8 years off.
# The announcement was made by Governor Jaques Wagner in an interview to a
# television station in Salvador.

# In Portuguese:
# http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html
# https://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html

# From Guilherme Bernardes Rodrigues (2011-10-07):
# There is news in the media, however there is still no decree about it.
# I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the
# official agency about time in Brazil, and she confirmed that the old rule is
# still in force.

# From Guilherme Bernardes Rodrigues (2011-10-14)
# It's official, the President signed a decree that includes Bahia in summer
# time.
#	 [ and in a second message (same day): ]
# I found the decree.
#
# DECRETO No. 7.584, DE 13 DE OUTUBRO DE 2011
# Link :
# http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6

# From Kelley Cook (2012-10-16):
# The governor of state of Bahia in Brazil announced on Thursday that
# due to public pressure, he is reversing the DST policy they implemented
# last year and will not be going to Summer Time on October 21st....
# http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia

# From Rodrigo Severo (2012-10-16):
# Tocantins state will have DST.
# https://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html

# From Steffen Thorsen (2013-09-20):
# Tocantins in Brazil is very likely not to observe DST from October....
# http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto
# We will keep this article updated when this is confirmed:
# https://www.timeanddate.com/news/time/brazil-starts-dst-2013.html

# From Steffen Thorsen (2013-10-17):
# https://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html
# Senator Jorge Viana announced that Acre will change time zone on November 10.
# He did not specify the time of the change, nor if western parts of Amazonas
# will change as well.
#
# From Paul Eggert (2013-10-17):
# For now, assume western Amazonas will change as well.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
# Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01)
# Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10)
Rule	Brazil	1931	only	-	Oct	 3	11:00	1:00	-
Rule	Brazil	1932	1933	-	Apr	 1	 0:00	0	-
Rule	Brazil	1932	only	-	Oct	 3	 0:00	1:00	-
# Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10)
# revoked DST.
# Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24)
# Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13)
Rule	Brazil	1949	1952	-	Dec	 1	 0:00	1:00	-
Rule	Brazil	1950	only	-	Apr	16	 1:00	0	-
Rule	Brazil	1951	1952	-	Apr	 1	 0:00	0	-
# Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24)
Rule	Brazil	1953	only	-	Mar	 1	 0:00	0	-
# Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30)
# revoked DST.
# Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18)
# established DST from 1963-10-23 00:00 to 1964-02-29 00:00
# in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
# Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03)
# extended the above decree to all of the national territory on 12-09.
Rule	Brazil	1963	only	-	Dec	 9	 0:00	1:00	-
# Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25)
# extended summer time by one day to 1964-03-01 00:00 (start of school).
Rule	Brazil	1964	only	-	Mar	 1	 0:00	0	-
# Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27)
Rule	Brazil	1965	only	-	Jan	31	 0:00	1:00	-
Rule	Brazil	1965	only	-	Mar	31	 0:00	0	-
# Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22)
Rule	Brazil	1965	only	-	Dec	 1	 0:00	1:00	-
# Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18)
Rule	Brazil	1966	1968	-	Mar	 1	 0:00	0	-
Rule	Brazil	1966	1967	-	Nov	 1	 0:00	1:00	-
# Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15)
# revoked DST.
# Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27)
Rule	Brazil	1985	only	-	Nov	 2	 0:00	1:00	-
# Decree 92,310 (1986-01-21)
# Decree 92,463 (1986-03-13)
Rule	Brazil	1986	only	-	Mar	15	 0:00	0	-
# Decree 93,316 (1986-10-01)
Rule	Brazil	1986	only	-	Oct	25	 0:00	1:00	-
Rule	Brazil	1987	only	-	Feb	14	 0:00	0	-
# Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22)
Rule	Brazil	1987	only	-	Oct	25	 0:00	1:00	-
Rule	Brazil	1988	only	-	Feb	 7	 0:00	0	-
# Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12)
# except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
Rule	Brazil	1988	only	-	Oct	16	 0:00	1:00	-
Rule	Brazil	1989	only	-	Jan	29	 0:00	0	-
# Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21)
# with the same exceptions
Rule	Brazil	1989	only	-	Oct	15	 0:00	1:00	-
Rule	Brazil	1990	only	-	Feb	11	 0:00	0	-
# Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17)
# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
# Decree 99,629 (1990-10-19) adds BA, MT.
Rule	Brazil	1990	only	-	Oct	21	 0:00	1:00	-
Rule	Brazil	1991	only	-	Feb	17	 0:00	0	-
# Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25)
# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
Rule	Brazil	1991	only	-	Oct	20	 0:00	1:00	-
Rule	Brazil	1992	only	-	Feb	 9	 0:00	0	-
# Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16)
# adopted by same states.
Rule	Brazil	1992	only	-	Oct	25	 0:00	1:00	-
Rule	Brazil	1993	only	-	Jan	31	 0:00	0	-
# Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28)
# adopted by same states, plus AM.
# Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22;
# web page corrected 2004-01-07) adopted by same states, minus AM.
# Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14)
# adopted by same states, plus MT and TO.
# Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13)
# adds AL, SE.
Rule	Brazil	1993	1995	-	Oct	Sun>=11	 0:00	1:00	-
Rule	Brazil	1994	1995	-	Feb	Sun>=15	 0:00	0	-
Rule	Brazil	1996	only	-	Feb	11	 0:00	0	-
# Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04)
# adopted by same states, minus AL, SE.
Rule	Brazil	1996	only	-	Oct	 6	 0:00	1:00	-
Rule	Brazil	1997	only	-	Feb	16	 0:00	0	-
# From Daniel C. Sobral (1998-02-12):
# In 1997, the DS began on October 6. The stated reason was that
# because international television networks ignored Brazil's policy on DS,
# they bought the wrong times on satellite for coverage of Pope's visit.
# This year, the ending date of DS was postponed to March 1
# to help dealing with the shortages of electric power.
#
# Decree 2,317 (1997-09-04), adopted by same states.
Rule	Brazil	1997	only	-	Oct	 6	 0:00	1:00	-
# Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG>
# (1998-02-10)
Rule	Brazil	1998	only	-	Mar	 1	 0:00	0	-
# Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11)
# adopted by the same states as before.
Rule	Brazil	1998	only	-	Oct	11	 0:00	1:00	-
Rule	Brazil	1999	only	-	Feb	21	 0:00	0	-
# Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif>
# (1999-08-23) adopted by same states.
# Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30)
# adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
Rule	Brazil	1999	only	-	Oct	 3	 0:00	1:00	-
Rule	Brazil	2000	only	-	Feb	27	 0:00	0	-
# Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06)
# adopted by the same states as before.
# Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13)
# repeals DST in PE and RR, effective 2000-10-15 00:00.
# Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17)
# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
# Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif>
# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
Rule	Brazil	2000	2001	-	Oct	Sun>=8	 0:00	1:00	-
Rule	Brazil	2001	2006	-	Feb	Sun>=15	 0:00	0	-
# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
# 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm>
Rule	Brazil	2002	only	-	Nov	 3	 0:00	1:00	-
# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
# 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm>
Rule	Brazil	2003	only	-	Oct	19	 0:00	1:00	-
# Decree 5,223 (2004-10-01) reestablishes DST in MT.
# 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm>
Rule	Brazil	2004	only	-	Nov	 2	 0:00	1:00	-
# Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19),
# adopted by the same states as before.
Rule	Brazil	2005	only	-	Oct	16	 0:00	1:00	-
# Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03),
# adopted by the same states as before.
Rule	Brazil	2006	only	-	Nov	 5	 0:00	1:00	-
Rule	Brazil	2007	only	-	Feb	25	 0:00	0	-
# Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26),
# adopted by the same states as before.
Rule	Brazil	2007	only	-	Oct	Sun>=8	 0:00	1:00	-
# From Frederico A. C. Neves (2008-09-10):
# According to this decree
# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
# 3rd Feb Sunday. There is an exception on the return date when this is
# the Carnival Sunday then the return date will be the next Sunday...
Rule	Brazil	2008	2017	-	Oct	Sun>=15	0:00	1:00	-
Rule	Brazil	2008	2011	-	Feb	Sun>=15	0:00	0	-
# Decree 7,584 <http://pcdsh01.on.br/HVdecreto7584_20111013.jpg> (2011-10-13)
# added Bahia.
Rule	Brazil	2012	only	-	Feb	Sun>=22	0:00	0	-
# Decree 7,826 <http://pcdsh01.on.br/HVdecreto7826_20121015.jpg> (2012-10-15)
# removed Bahia and added Tocantins.
# Decree 8,112 <http://pcdsh01.on.br/HVdecreto8112_20130930.JPG> (2013-09-30)
# removed Tocantins.
Rule	Brazil	2013	2014	-	Feb	Sun>=15	0:00	0	-
Rule	Brazil	2015	only	-	Feb	Sun>=22	0:00	0	-
Rule	Brazil	2016	2019	-	Feb	Sun>=15	0:00	0	-
# From Steffen Thorsen (2017-12-18):
# According to many media sources, next year's DST start in Brazil will move to
# the first Sunday of November
# ... https://www.timeanddate.com/news/time/brazil-delays-dst-2018.html
# From Steffen Thorsen (2017-12-20):
# http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2017/decreto/D9242.htm
# From Fábio Gomes (2018-10-04):
# The Brazilian president just announced a new change on this year DST.
# It was scheduled to start on November 4th and it was changed to November 18th.
# From Rodrigo Brüning Wessler (2018-10-15):
# The Brazilian government just announced that the change in DST was
# canceled....  Maybe the president Michel Temer also woke up one hour
# earlier today. :)
Rule	Brazil	2018	only	-	Nov	Sun>=1	0:00	1:00	-
# The last ruleset listed above says that the following states observed DST:
# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
#
# From Steffen Thorsen (2019-04-05):
# According to multiple sources the Brazilian president wants to get rid of DST.
# https://gmconline.com.br/noticias/politica/bolsonaro-horario-de-verao-deve-acabar-este-ano
# https://g1.globo.com/economia/noticia/2019/04/05/governo-anuncia-fim-do-horario-de-verao.ghtml
# From Marcus Diniz (2019-04-25):
# Brazil no longer has DST changes - decree signed today
# https://g1.globo.com/politica/noticia/2019/04/25/bolsonaro-assina-decreto-que-acaba-com-o-horario-de-verao.ghtml
# From Daniel Soares de Oliveira (2019-04-26):
# http://www.planalto.gov.br/ccivil_03/_Ato2019-2022/2019/Decreto/D9772.htm

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
#
# Fernando de Noronha (administratively part of PE)
Zone America/Noronha	-2:09:40 -	LMT	1914
			-2:00	Brazil	%z	1990 Sep 17
			-2:00	-	%z	1999 Sep 30
			-2:00	Brazil	%z	2000 Oct 15
			-2:00	-	%z	2001 Sep 13
			-2:00	Brazil	%z	2002 Oct  1
			-2:00	-	%z
# Other Atlantic islands have no permanent settlement.
# These include Trindade and Martim Vaz (administratively part of ES),
# Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE).
# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
# it also included the Penedos.
#
# Amapá (AP), east Pará (PA)
# East Pará includes Belém, Marabá, Serra Norte, and São Félix do Xingu.
# The division between east and west Pará is the river Xingu.
# In the north a very small part from the river Javary (now Jari I guess,
# the border with Amapá) to the Amazon, then to the Xingu.
Zone America/Belem	-3:13:56 -	LMT	1914
			-3:00	Brazil	%z	1988 Sep 12
			-3:00	-	%z
#
# west Pará (PA)
# West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém.
Zone America/Santarem	-3:38:48 -	LMT	1914
			-4:00	Brazil	%z	1988 Sep 12
			-4:00	-	%z	2008 Jun 24  0:00
			-3:00	-	%z
#
# Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN),
# Paraíba (PB)
Zone America/Fortaleza	-2:34:00 -	LMT	1914
			-3:00	Brazil	%z	1990 Sep 17
			-3:00	-	%z	1999 Sep 30
			-3:00	Brazil	%z	2000 Oct 22
			-3:00	-	%z	2001 Sep 13
			-3:00	Brazil	%z	2002 Oct  1
			-3:00	-	%z
#
# Pernambuco (PE) (except Atlantic islands)
Zone America/Recife	-2:19:36 -	LMT	1914
			-3:00	Brazil	%z	1990 Sep 17
			-3:00	-	%z	1999 Sep 30
			-3:00	Brazil	%z	2000 Oct 15
			-3:00	-	%z	2001 Sep 13
			-3:00	Brazil	%z	2002 Oct  1
			-3:00	-	%z
#
# Tocantins (TO)
Zone America/Araguaina	-3:12:48 -	LMT	1914
			-3:00	Brazil	%z	1990 Sep 17
			-3:00	-	%z	1995 Sep 14
			-3:00	Brazil	%z	2003 Sep 24
			-3:00	-	%z	2012 Oct 21
			-3:00	Brazil	%z	2013 Sep
			-3:00	-	%z
#
# Alagoas (AL), Sergipe (SE)
Zone America/Maceio	-2:22:52 -	LMT	1914
			-3:00	Brazil	%z	1990 Sep 17
			-3:00	-	%z	1995 Oct 13
			-3:00	Brazil	%z	1996 Sep  4
			-3:00	-	%z	1999 Sep 30
			-3:00	Brazil	%z	2000 Oct 22
			-3:00	-	%z	2001 Sep 13
			-3:00	Brazil	%z	2002 Oct  1
			-3:00	-	%z
#
# Bahia (BA)
# There are too many Salvadors elsewhere, so use America/Bahia instead
# of America/Salvador.
Zone America/Bahia	-2:34:04 -	LMT	1914
			-3:00	Brazil	%z	2003 Sep 24
			-3:00	-	%z	2011 Oct 16
			-3:00	Brazil	%z	2012 Oct 21
			-3:00	-	%z
#
# Goiás (GO), Distrito Federal (DF), Minas Gerais (MG),
# Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR),
# Santa Catarina (SC), Rio Grande do Sul (RS)
Zone America/Sao_Paulo	-3:06:28 -	LMT	1914
			-3:00	Brazil	%z	1963 Oct 23  0:00
			-3:00	1:00	%z	1964
			-3:00	Brazil	%z
#
# Mato Grosso do Sul (MS)
Zone America/Campo_Grande -3:38:28 -	LMT	1914
			-4:00	Brazil	%z
#
# Mato Grosso (MT)
Zone America/Cuiaba	-3:44:20 -	LMT	1914
			-4:00	Brazil	%z	2003 Sep 24
			-4:00	-	%z	2004 Oct  1
			-4:00	Brazil	%z
#
# Rondônia (RO)
Zone America/Porto_Velho -4:15:36 -	LMT	1914
			-4:00	Brazil	%z	1988 Sep 12
			-4:00	-	%z
#
# Roraima (RR)
Zone America/Boa_Vista	-4:02:40 -	LMT	1914
			-4:00	Brazil	%z	1988 Sep 12
			-4:00	-	%z	1999 Sep 30
			-4:00	Brazil	%z	2000 Oct 15
			-4:00	-	%z
#
# east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto
# The great circle line from Tabatinga to Porto Acre divides
# east from west Amazonas.
Zone America/Manaus	-4:00:04 -	LMT	1914
			-4:00	Brazil	%z	1988 Sep 12
			-4:00	-	%z	1993 Sep 28
			-4:00	Brazil	%z	1994 Sep 22
			-4:00	-	%z
#
# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
#	Eirunepé, Envira, Ipixuna
Zone America/Eirunepe	-4:39:28 -	LMT	1914
			-5:00	Brazil	%z	1988 Sep 12
			-5:00	-	%z	1993 Sep 28
			-5:00	Brazil	%z	1994 Sep 22
			-5:00	-	%z	2008 Jun 24  0:00
			-4:00	-	%z	2013 Nov 10
			-5:00	-	%z
#
# Acre (AC)
Zone America/Rio_Branco	-4:31:12 -	LMT	1914
			-5:00	Brazil	%z	1988 Sep 12
			-5:00	-	%z	2008 Jun 24  0:00
			-4:00	-	%z	2013 Nov 10
			-5:00	-	%z

# Chile

# From Paul Eggert (2022-03-15):
# Shanks & Pottenger says America/Santiago introduced standard time in
# 1890 and rounds its UT offset to 70W40; guess that in practice this
# was the same offset as in 1916-1919.  It also says Pacific/Easter
# standardized on 109W22 in 1890; assume this didn't change the clocks.
#
# Dates for America/Santiago from 1910 to 2004 are primarily from
# the following source, cited by Oscar van Vlijmen (2006-10-08):
# [1] Chile Law
# http://www.webexhibits.org/daylightsaving/chile.html
# This contains a copy of this official table:
# Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30)
# https://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm
# [1] needs several corrections, though.
#
# The first set of corrections is from:
# [2] History of the Official Time of Chile
# http://www.horaoficial.cl/ing/horaof_ing.html (retrieved 2012-03-06).  See:
# https://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html
# This is an English translation of:
# Historia de la hora oficial de Chile (retrieved 2012-10-24).  See:
# https://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm
# A fancier Spanish version (requiring mouse-clicking) is at:
# http://www.horaoficial.cl/historia_hora.php
# Conflicts between [1] and [2] were resolved as follows:
#
#  - [1] says the 1910 transition was Jan 1, [2] says Jan 10 and cites
#    Boletín No. 1, Aviso No. 1 (1910).  Go with [2].
#
#  - [1] says SMT was -4:42:45, [2] says Chile's official time from
#    1916 to 1919 was -4:42:46.3, the meridian of Chile's National
#    Astronomical Observatory (OAN), then located in what is now
#    Quinta Normal in Santiago.  Go with [1], as this matches the meridian
#    referred to by the relevant Chilean laws to this day.
#
#  - [1] says the 1918 transition was Sep 1, [2] says Sep 10 and cites
#    Boletín No. 22, Aviso No. 129/1918 (1918-08-23).  Go with [2].
#
#  - [1] does not give times for transitions; assume they occur
#    at midnight mainland time, the current common practice.  However,
#    go with [2]'s specification of 23:00 for the 1947-05-21 transition.
#
# Another correction to [1] is from Jesper Nørgaard Welen, who
# wrote (2006-10-08), "I think that there are some obvious mistakes in
# the suggested link from Oscar van Vlijmen,... for instance entry 66
# says that GMT-4 ended 1990-09-12 while entry 67 only begins GMT-3 at
# 1990-09-15 (they should have been 1990-09-15 and 1990-09-16
# respectively), but anyhow it clears up some doubts too."
#
# Data for Pacific/Easter from 1910 through 1967 come from Shanks &
# Pottenger.  After that, for lack of better info assume
# Pacific/Easter is always two hours behind America/Santiago;
# this is known to work for DST transitions starting in 2008 and
# may well be true for earlier transitions.

# From Tim Parenti (2022-07-06):
# For a brief period of roughly six weeks in 1946, DST was only observed on an
# emergency basis in specific regions of central Chile; namely, "the national
# territory between the provinces of Coquimbo and Concepción, inclusive".
# This was enacted by Decree 3,891, dated 1946-07-13, and took effect
# 1946-07-14 24:00, advancing these central regions to -03.
# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460715/#page/1
# The decree contemplated "[t]hat this advancement of the Official Time, even
# though it has been proposed for the cities of Santiago and Valparaíso only,
# must be agreed with that of other cities, due to the connection of various
# activities that require it, such as, for example, the operation of rail
# services".  It was originally set to expire after 30 days but was extended
# through 1946-08-31 by Decree 4,506, dated 1946-08-13.
# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460814/#page/1
#
# Law Number 8,522, promulgated 1946-08-27, reunified Chilean clocks at their
# new "Summer Time" of -04, reckoned as that of "the meridian of the
# Astronomical Observatory of Lo Espejo, advanced by 42 minutes and 45
# seconds".  Although this law specified the new Summer Time to start on 1
# September each year, a special "transitional article" started it a few days
# early, as soon as the law took effect.  As the law was to take force "from
# the date of its publication in the 'Diario Oficial', which happened the
# following day, presume the change took place in Santiago and its environs
# from 24:00 -03 to 23:00 -04 on Wednesday 1946-08-28.  Although this was a
# no-op for wall clocks in the north and south of the country, put their formal
# start to DST an hour later when they reached 24:00 -04.
# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460828/#page/1
# After a brief "Winter Time" stint at -05 beginning 1947-04-01, Law Number
# 8,777, promulgated 1947-05-17, established year-round -04 "from 23:00 on the
# second day after it is published in the 'Diario Oficial'."  It was published
# on Monday 1947-05-19 and so took effect from Wednesday 1947-05-21 23:00.
# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19470519/#page/1

# From Eduardo Krell (1995-10-19):
# The law says to switch to DST at midnight [24:00] on the second SATURDAY
# of October....  The law is the same for March and October.
# (1998-09-29):
# Because of the drought this year, the government decided to go into
# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
# (unless there's another dry season next year, I guess).

# From Julio I. Pacheco Troncoso (1999-03-18):
# Because of the same drought, the government decided to end DST later,
# on April 3, (one-time change).

# From Germán Poo-Caamaño (2008-03-03):
# Due to drought, Chile extends Daylight Time in three weeks.  This
# is one-time change (Saturday 3/29 at 24:00 for America/Santiago
# and Saturday 3/29 at 22:00 for Pacific/Easter)
# The Supreme Decree is located at
# http://www.shoa.cl/servicios/supremo316.pdf
#
# From José Miguel Garrido (2008-03-05):
# http://www.shoa.cl/noticias/2008/04hora/hora.htm

# From Angel Chiang (2010-03-04):
# Subject: DST in Chile exceptionally extended to 3 April due to earthquake
# http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
#
# From Arthur David Olson (2010-03-06):
# Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.

# From Glenn Eychaner (2011-03-28):
# http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
# In English:
# Chile's clocks will go back an hour this year on the 7th of May instead
# of this Saturday. They will go forward again the 3rd Saturday in
# August, not in October as they have since 1968.

# From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
# As stated in the website of the Chilean Energy Ministry
# http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
# The Chilean Government has decided to postpone the entrance into winter time
# (to leave DST) from March 11 2012 to April 28th 2012....
# Quote from the website communication:
#
# 6. For the year 2012, the dates of entry into winter time will be as follows:
# a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
# 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
# of the same day.
# b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is,
# at 23:59:59, instead of passing to 0:00, the time should be adjusted to be
# 01:00 on September 2.

# From Steffen Thorsen (2013-02-15):
# According to several news sources, Chile has extended DST this year,
# they will end DST later and start DST earlier than planned.  They
# hope to save energy.  The new end date is 2013-04-28 00:00 and new
# start date is 2013-09-08 00:00....
# http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm

# From José Miguel Garrido (2014-02-19):
# Today appeared in the Diario Oficial a decree amending the time change
# dates to 2014.
# DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC)
# DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC)
# From Tim Parenti (2025-03-22):
# Decreto 307 of 2014 of the Ministry of the Interior and Public Security,
# promulgated 2014-01-30 and published 2014-02-19:
# https://www.diariooficial.interior.gob.cl/media/2014/02/19/do-20140219.pdf#page=1
# https://www.bcn.cl/leychile/navegar?idNorma=1059557

# From Eduardo Romero Urra (2015-03-03):
# Today has been published officially that Chile will use the DST time
# permanently until March 25 of 2017
# From Tim Parenti (2025-03-22):
# Decreto 106 of 2015 of the Ministry of the Interior and Public Security,
# promulgated 2015-01-27 and published 2015-03-03:
# https://www.diariooficial.interior.gob.cl/media/2015/03/03/do-20150303.pdf#page=1
# https://www.bcn.cl/leychile/navegar?idNorma=1075157

# From Juan Correa (2016-03-18):
# The decree regarding DST has been published in today's Official Gazette...
# It does consider the second Saturday of May and August as the dates
# for the transition; and it lists DST dates until 2019, but I think
# this scheme will stick.
# From Paul Eggert (2016-03-18):
# The decree says transitions occur at 24:00; in practice this appears
# to mean 24:00 mainland time, not 24:00 local time, so that Easter
# Island is always two hours behind the mainland.
# From Tim Parenti (2025-03-22):
# Decreto 253 of 2016 of the Ministry of the Interior and Public Security,
# promulgated 2016-03-16 and published 2016-03-18.
# https://www.diariooficial.interior.gob.cl/media/2016/03/18/do-20160318.pdf#page=1
# https://www.bcn.cl/leychile/navegar?idNorma=1088502

# From Juan Correa (2016-12-04):
# Magallanes region ... will keep DST (UTC -3) all year round....
# http://www.soychile.cl/Santiago/Sociedad/2016/12/04/433428/Bachelet-firmo-el-decreto-para-establecer-un-horario-unico-para-la-Region-de-Magallanes.aspx
# From Tim Parenti (2025-03-22), via Deborah Goldsmith (2017-01-19):
# Decreto 1820 of 2016 of the Ministry of the Interior and Public Security,
# promulgated 2016-12-02 and published 2017-01-17:
# https://www.diariooficial.interior.gob.cl/publicaciones/2017/01/17/41660/01/1169626.pdf
# https://www.bcn.cl/leychile/Navegar?idNorma=1099217
# Model this as a change to standard offset effective 2016-12-04.

# From Juan Correa (2018-08-13):
# As of moments ago, the Ministry of Energy in Chile has announced the new
# schema for DST. ...  Announcement in video (in Spanish):
# https://twitter.com/MinEnergia/status/1029000399129374720
# From Yonathan Dossow (2018-08-13):
# The video says "first Saturday of September", we all know it means Sunday at
# midnight.
# From Tim Parenti (2018-08-13):
# Translating the captions on the video at 0:44-0:55, "We want to announce as
# Government that from 2019, Winter Time will be increased to 5 months, between
# the first Saturday of April and the first Saturday of September."
# At 2:08-2:20, "The Magallanes region will maintain its current time, as
# decided by the citizens during 2017, but our Government will promote a
# regional dialogue table to gather their opinion on this matter."
# https://twitter.com/MinEnergia/status/1029009354001973248
# "We will keep the new time policy unchanged for at least the next 4 years."
# So we extend the new rules on Saturdays at 24:00 mainland time indefinitely.
# From Tim Parenti (2025-03-22), via Juan Correa (2019-02-04):
# Decreto 1286 of 2018 of the Ministry of the Interior and Public Security,
# promulgated 2018-09-21 and published 2018-11-23:
# https://www.diariooficial.interior.gob.cl/publicaciones/2018/11/23/42212/01/1498738.pdf
# https://www.bcn.cl/leychile/Navegar?idNorma=1125760

# From Juan Correa (2022-04-02):
# I found there was a decree published last Thursday that will keep
# Magallanes region to UTC -3 "indefinitely".
# From Tim Parenti (2025-03-22):
# Decreto 143 of 2022 of the Ministry of the Interior and Public Security,
# promulgated 2022-03-29 and published 2022-03-31:
# https://www.diariooficial.interior.gob.cl/publicaciones/2022/03/31/43217-B/01/2108910.pdf
# https://www.bcn.cl/leychile/Navegar?idNorma=1174342

# From Juan Correa (2022-08-09):
# the Internal Affairs Ministry (Ministerio del Interior) informed DST
# for America/Santiago will start on midnight of September 11th;
# and will end on April 1st, 2023. Magallanes region (America/Punta_Arenas)
# will keep UTC -3 "indefinitely"...  This is because on September 4th
# we will have a voting whether to approve a new Constitution.
#
# From Tim Parenti (2025-03-22), via Eduardo Romero Urra (2022-08-17):
# Decreto 224 of 2022 of the Ministry of the Interior and Public Security,
# promulgated 2022-07-14 and published 2022-08-13:
# https://www.diariooficial.interior.gob.cl/publicaciones/2022/08/13/43327/01/2172567.pdf
# https://www.bcn.cl/leychile/navegar?idNorma=1179983
#
# From Paul Eggert (2022-08-17):
# Although the presidential decree stops at fall 2026, assume that
# similar DST rules will continue thereafter.

# From Paul Eggert (2025-01-15):
# Diario Regional Aysén's Sebastián Martel reports that 94% of Aysén
# citizens polled in November favored changing the rules from
# -04/-03-with-DST to -03 all year...
# https://www.diarioregionalaysen.cl/noticia/actualidad/2024/12/presentan-decision-que-gano-la-votacion-sobre-el-cambio-del-huso-horario-en-aysen
#
# From Yonathan Dossow (2025-03-20):
# [T]oday we have more confirmation of the change.  [Aysén] region will keep
# UTC-3 all year...
# https://www.cnnchile.com/pais/region-de-aysen-mantendra-horario-de-verano-todo-el-ano_20250320/
# https://www.latercera.com/nacional/noticia/tras-consulta-ciudadana-region-de-aysen-mantendra-el-horario-de-verano-durante-todo-el-ano/
# https://x.com/min_interior/status/1902692504270672098
#
# From Tim Parenti (2025-03-22), via Eduardo Romero Urra (2025-03-20):
# Decreto 93 of 2025 of the Ministry of the Interior and Public Security,
# promulgated 2025-03-11 and published 2025-03-20:
# https://www.diariooficial.interior.gob.cl/publicaciones/2025/03/20/44104/01/2624263.pdf
# https://www.bcn.cl/leychile/Navegar?idNorma=1211955
# Model this as a change to standard offset effective 2025-03-20.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Chile	1927	1931	-	Sep	 1	0:00	1:00	-
Rule	Chile	1928	1932	-	Apr	 1	0:00	0	-
Rule	Chile	1968	only	-	Nov	 3	4:00u	1:00	-
Rule	Chile	1969	only	-	Mar	30	3:00u	0	-
Rule	Chile	1969	only	-	Nov	23	4:00u	1:00	-
Rule	Chile	1970	only	-	Mar	29	3:00u	0	-
Rule	Chile	1971	only	-	Mar	14	3:00u	0	-
Rule	Chile	1970	1972	-	Oct	Sun>=9	4:00u	1:00	-
Rule	Chile	1972	1986	-	Mar	Sun>=9	3:00u	0	-
Rule	Chile	1973	only	-	Sep	30	4:00u	1:00	-
Rule	Chile	1974	1987	-	Oct	Sun>=9	4:00u	1:00	-
Rule	Chile	1987	only	-	Apr	12	3:00u	0	-
Rule	Chile	1988	1990	-	Mar	Sun>=9	3:00u	0	-
Rule	Chile	1988	1989	-	Oct	Sun>=9	4:00u	1:00	-
Rule	Chile	1990	only	-	Sep	16	4:00u	1:00	-
Rule	Chile	1991	1996	-	Mar	Sun>=9	3:00u	0	-
Rule	Chile	1991	1997	-	Oct	Sun>=9	4:00u	1:00	-
Rule	Chile	1997	only	-	Mar	30	3:00u	0	-
Rule	Chile	1998	only	-	Mar	Sun>=9	3:00u	0	-
Rule	Chile	1998	only	-	Sep	27	4:00u	1:00	-
Rule	Chile	1999	only	-	Apr	 4	3:00u	0	-
Rule	Chile	1999	2010	-	Oct	Sun>=9	4:00u	1:00	-
Rule	Chile	2000	2007	-	Mar	Sun>=9	3:00u	0	-
# N.B.: the end of March 29 in Chile is March 30 in Universal time,
# which is used below in specifying the transition.
Rule	Chile	2008	only	-	Mar	30	3:00u	0	-
Rule	Chile	2009	only	-	Mar	Sun>=9	3:00u	0	-
Rule	Chile	2010	only	-	Apr	Sun>=1	3:00u	0	-
Rule	Chile	2011	only	-	May	Sun>=2	3:00u	0	-
Rule	Chile	2011	only	-	Aug	Sun>=16	4:00u	1:00	-
Rule	Chile	2012	2014	-	Apr	Sun>=23	3:00u	0	-
Rule	Chile	2012	2014	-	Sep	Sun>=2	4:00u	1:00	-
Rule	Chile	2016	2018	-	May	Sun>=9	3:00u	0	-
Rule	Chile	2016	2018	-	Aug	Sun>=9	4:00u	1:00	-
Rule	Chile	2019	max	-	Apr	Sun>=2	3:00u	0	-
Rule	Chile	2019	2021	-	Sep	Sun>=2	4:00u	1:00	-
Rule	Chile	2022	only	-	Sep	Sun>=9	4:00u	1:00	-
Rule	Chile	2023	max	-	Sep	Sun>=2	4:00u	1:00	-
# IATA SSIM anomalies: (1992-02) says 1992-03-14;
# (1996-09) says 1998-03-08.  Ignore these.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Santiago	-4:42:45 -	LMT	1890
			-4:42:45 -	SMT	1910 Jan 10 # Santiago Mean Time
			-5:00	-	%z	1916 Jul  1
			-4:42:45 -	SMT	1918 Sep 10
			-4:00	-	%z	1919 Jul  1
			-4:42:45 -	SMT	1927 Sep  1
			-5:00	Chile	%z	1932 Sep  1
			-4:00	-	%z	1942 Jun  1
			-5:00	-	%z	1942 Aug  1
			-4:00	-	%z	1946 Jul 14 24:00
			-4:00	1:00	%z	1946 Aug 28 24:00 # central CL
			-5:00	1:00	%z	1947 Mar 31 24:00
			-5:00	-	%z	1947 May 21 23:00
			-4:00	Chile	%z
Zone America/Coyhaique	-4:48:16 -	LMT	1890
			-4:42:45 -	SMT	1910 Jan 10
			-5:00	-	%z	1916 Jul  1
			-4:42:45 -	SMT	1918 Sep 10
			-4:00	-	%z	1919 Jul  1
			-4:42:45 -	SMT	1927 Sep  1
			-5:00	Chile	%z	1932 Sep  1
			-4:00	-	%z	1942 Jun  1
			-5:00	-	%z	1942 Aug  1
			-4:00	-	%z	1946 Aug 28 24:00
			-5:00	1:00	%z	1947 Mar 31 24:00
			-5:00	-	%z	1947 May 21 23:00
			-4:00	Chile	%z	2025 Mar 20
			-3:00	-	%z
Zone America/Punta_Arenas -4:43:40 -	LMT	1890
			-4:42:45 -	SMT	1910 Jan 10
			-5:00	-	%z	1916 Jul  1
			-4:42:45 -	SMT	1918 Sep 10
			-4:00	-	%z	1919 Jul  1
			-4:42:45 -	SMT	1927 Sep  1
			-5:00	Chile	%z	1932 Sep  1
			-4:00	-	%z	1942 Jun  1
			-5:00	-	%z	1942 Aug  1
			-4:00	-	%z	1946 Aug 28 24:00
			-5:00	1:00	%z	1947 Mar 31 24:00
			-5:00	-	%z	1947 May 21 23:00
			-4:00	Chile	%z	2016 Dec  4
			-3:00	-	%z
Zone Pacific/Easter	-7:17:28 -	LMT	1890
			-7:17:28 -	EMT	1932 Sep    # Easter Mean Time
			-7:00	Chile	%z	1982 Mar 14 3:00u # Easter Time
			-6:00	Chile	%z
#
# Salas y Gómez Island is uninhabited.
# Other Chilean locations, including Juan Fernández Is, Desventuradas Is,
# and Antarctic bases, are like America/Santiago.

# Antarctic base using South American rules
# (See the file 'antarctica' for more.)
#
# Palmer, Anvers Island, since 1965 (moved 2 miles in 1968)
#
# From Ethan Dicks (1996-10-06):
# It keeps the same time as Punta Arenas, Chile, because, just like us
# and the South Pole, that's the other end of their supply line....
# I verified with someone who was there that since 1980,
# Palmer has followed Chile.  Prior to that, before the Falklands War,
# Palmer used to be supplied from Argentina.
#
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Antarctica/Palmer	0	-	-00	1965
			-4:00	Arg	%z	1969 Oct  5
			-3:00	Arg	%z	1982 May
			-4:00	Chile	%z	2016 Dec  4
			-3:00	-	%z

# Colombia

# Milne gives 4:56:16.4 for Bogotá time in 1899.  He writes,
# "A variation of fifteen minutes in the public clocks of Bogota is not rare."

# From Alois Treindl (2022-11-10):
# End of time change in Colombia 1993 ... should be 6 February 24h ...
# DECRETO 267 DE 1993
# https://www.suin-juriscol.gov.co/viewDocument.asp?ruta=Decretos/1061335

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	CO	1992	only	-	May	 3	 0:00	1:00	-
Rule	CO	1993	only	-	Feb	 6	24:00	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
		#STDOFF	-4:56:16.4
Zone	America/Bogota	-4:56:16 -	LMT	1884 Mar 13
			-4:56:16 -	BMT	1914 Nov 23 # Bogotá Mean Time
			-5:00	CO	%z
# Malpelo, Providencia, San Andres
# no information; probably like America/Bogota


# Ecuador
#
# Milne says the Central and South American Telegraph Company used -5:24:15.
#
# From Alois Treindl (2016-12-15):
# https://www.elcomercio.com/actualidad/hora-sixto-1993.html
# ... Whether the law applied also to Galápagos, I do not know.
# From Paul Eggert (2016-12-15):
# https://www.elcomercio.com/afull/modificacion-husohorario-ecuador-presidentes-decreto.html
# This says President Sixto Durán Ballén signed decree No. 285, which
# established DST from 1992-11-28 to 1993-02-05; it does not give transition
# times.  The people called it "hora de Sixto" ("Sixto hour").  The change did
# not go over well; a popular song "Qué hora es" by Jaime Guevara had lyrics
# that included "Amanecía en mitad de la noche, los guaguas iban a clase sin
# sol" ("It was dawning in the middle of the night, the buses went to class
# without sun").  Although Ballén's campaign slogan was "Ni un paso atrás"
# (Not one step back), the clocks went back in 1993 and the experiment was not
# repeated.  For now, assume transitions were at 00:00 local time country-wide.
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Ecuador	1992	only	-	Nov	28	0:00	1:00	-
Rule	Ecuador	1993	only	-	Feb	 5	0:00	0	-
#
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Guayaquil	-5:19:20 -	LMT	1890
			-5:14:00 -	QMT	1931 # Quito Mean Time
			-5:00	Ecuador	%z
Zone Pacific/Galapagos	-5:58:24 -	LMT	1931 # Puerto Baquerizo Moreno
			-5:00	-	%z	1986
			-6:00	Ecuador	%z

# Falklands

# From Paul Eggert (2006-03-22):
# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
# the IATA gives 1996-09-08.  Go with Shanks & Pottenger.

# From Falkland Islands Government Office, London (2001-01-22)
# via Jesper Nørgaard:
# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
# April 2001 and advance one hour to summer time at 2 am on Sunday 2
# September.  It is anticipated that the clocks will revert back at 2
# am on Sunday 21 April 2002 and advance to summer time at 2 am on
# Sunday 1 September.

# From Rives McDow (2001-02-13):
#
# I have communicated several times with people there, and the last
# time I had communications that was helpful was in 1998.  Here is
# what was said then:
#
# "The general rule was that Stanley used daylight saving and the Camp
# did not. However for various reasons many people in the Camp have
# started to use daylight saving (known locally as 'Stanley Time')
# There is no rule as to who uses daylight saving - it is a matter of
# personal choice and so it is impossible to draw a map showing who
# uses it and who does not. Any list would be out of date as soon as
# it was produced. This year daylight saving ended on April 18/19th
# and started again on September 12/13th.  I do not know what the rule
# is, but can find out if you like.  We do not change at the same time
# as UK or Chile."
#
# I did have in my notes that the rule was "Second Saturday in Sep at
# 0:00 until third Saturday in Apr at 0:00".  I think that this does
# not agree in some cases with Shanks; is this true?
#
# Also, there is no mention in the list that some areas in the
# Falklands do not use DST.  I have found in my communications there
# that these areas are on the western half of East Falkland and all of
# West Falkland.  Stanley is the only place that consistently observes
# DST.  Again, as in other places in the world, the farmers don't like
# it.  West Falkland is almost entirely sheep farmers.
#
# I know one lady there that keeps a list of which farm keeps DST and
# which doesn't each year.  She runs a shop in Stanley, and says that
# the list changes each year.  She uses it to communicate to her
# customers, catching them when they are home for lunch or dinner.

# From Paul Eggert (2001-03-05):
# For now, we'll just record the time in Stanley, since we have no
# better info.

# From Steffen Thorsen (2011-04-01):
# The Falkland Islands will not turn back clocks this winter, but stay on
# daylight saving time.
#
# One source:
# http://www.falklandnews.com/public/story.cfm?get=5914&source=3
#
# We have gotten this confirmed by a clerk of the legislative assembly:
# Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the
# third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3
# hours) on the first Sunday of September at 0200hrs.
#
# IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands
# will not revert to local mean time, but clocks will remain on Summer
# time (UTC/GMT - 3 hours) throughout the whole of 2011.  Any long term
# change to local time following the trial period will be notified.
#
# From Andrew Newman (2012-02-24)
# A letter from Justin McPhee, Chief Executive,
# Cable & Wireless Falkland Islands (dated 2012-02-22)
# states...
#   The current Atlantic/Stanley entry under South America expects the
#   clocks to go back to standard Falklands Time (FKT) on the 15th April.
#   The database entry states that in 2011 Stanley was staying on fixed
#   summer time on a trial basis only.  FIG need to contact IANA and/or
#   the maintainers of the database to inform them we're adopting
#   the same policy this year and suggest recommendations for future years.
#
# For now we will assume permanent -03 for the Falklands
# until advised differently (to apply for 2012 and beyond, after the 2011
# experiment was apparently successful.)
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Falk	1937	1938	-	Sep	lastSun	0:00	1:00	-
Rule	Falk	1938	1942	-	Mar	Sun>=19	0:00	0	-
Rule	Falk	1939	only	-	Oct	1	0:00	1:00	-
Rule	Falk	1940	1942	-	Sep	lastSun	0:00	1:00	-
Rule	Falk	1943	only	-	Jan	1	0:00	0	-
Rule	Falk	1983	only	-	Sep	lastSun	0:00	1:00	-
Rule	Falk	1984	1985	-	Apr	lastSun	0:00	0	-
Rule	Falk	1984	only	-	Sep	16	0:00	1:00	-
Rule	Falk	1985	2000	-	Sep	Sun>=9	0:00	1:00	-
Rule	Falk	1986	2000	-	Apr	Sun>=16	0:00	0	-
Rule	Falk	2001	2010	-	Apr	Sun>=15	2:00	0	-
Rule	Falk	2001	2010	-	Sep	Sun>=1	2:00	1:00	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Atlantic/Stanley	-3:51:24 -	LMT	1890
			-3:51:24 -	SMT	1912 Mar 12 # Stanley Mean Time
			-4:00	Falk	%z	1983 May
			-3:00	Falk	%z	1985 Sep 15
			-4:00	Falk	%z	2010 Sep  5  2:00
			-3:00	-	%z

# French Guiana
# For the 1911/1912 establishment of standard time in French possessions, see:
# Société Française de Physique, Recueil de constantes physiques (1913),
# page 752, 18b.
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Cayenne	-3:29:20 -	LMT	1911 Jul  1
			-4:00	-	%z	1967 Oct
			-3:00	-	%z

# Guyana

# From P Chan (2020-11-27):
# https://books.google.com/books?id=5-5CAQAAMAAJ&pg=SA1-PA547
# The Official Gazette of British Guiana. (New Series.) Vol. XL. July to
# December, 1915, p 1547, lists as several notes:
# "Local Mean Time 3 hours 52 mins. 39 secs. slow of Greenwich Mean Time
# (Georgetown.) From 1st August, 1911, British Guiana Standard Mean Time 4
# hours slow of Greenwich Mean Time, by notice in Official Gazette on 1st July,
# 1911.  From 1st March, 1915, British Guiana Standard Mean Time 3 hours 45
# mins. 0 secs. slow of Greenwich Mean Time, by notice in Official Gazette on
# 23rd January, 1915."
#
# https://parliament.gov.gy/documents/acts/10923-act_no._27_of_1975_-_interpretation_and_general_clauses_(amendment)_act_1975.pdf
# Interpretation and general clauses (Amendment) Act 1975 (Act No. 27 of 1975)
# [dated 1975-07-31]
# "This Act...shall come into operation on 1st August, 1975."
# "...where any expression of time occurs...the time referred to shall signify
# the standard time of Guyana which shall be three hours behind Greenwich Mean
# Time."
#
# Circular No. 10/1992 dated 1992-03-20
# https://dps.gov.gy/wp-content/uploads/2018/12/1992-03-20-Circular-010.pdf
# "...cabinet has decided that with effect from Sunday 29th March, 1992, Guyana
# Standard Time would be re-established at 01:00 hours by adjusting the hands
# of the clock back to 24:00 hours."
# Legislated in the Interpretation and general clauses (Amendment) Act 1992
# (Act No. 6 of 1992) [passed 1992-03-27, published 1992-04-18]
# https://parliament.gov.gy/documents/acts/5885-6_of_1992_interpretation_and_general_clauses_(amendment)_act_1992.pdf

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	America/Guyana	-3:52:39 -	LMT	1911 Aug  1 # Georgetown
			-4:00	-	%z	1915 Mar  1
			-3:45	-	%z	1975 Aug  1
			-3:00	-	%z	1992 Mar 29  1:00
			-4:00	-	%z

# Paraguay
#
# From Paul Eggert (2006-03-22):
# Shanks & Pottenger say that spring transitions are 01:00 -> 02:00,
# and autumn transitions are 00:00 -> 23:00.  Go with pre-1999
# editions of Shanks, and with the IATA, who say transitions occur at 00:00.
#
# From Waldemar Villamayor-Venialbo (2013-09-20):
# No time of the day is established for the adjustment, so people normally
# adjust their clocks at 0 hour of the given dates.
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Para	1975	1988	-	Oct	 1	0:00	1:00	-
Rule	Para	1975	1978	-	Mar	 1	0:00	0	-
Rule	Para	1979	1991	-	Apr	 1	0:00	0	-
Rule	Para	1989	only	-	Oct	22	0:00	1:00	-
Rule	Para	1990	only	-	Oct	 1	0:00	1:00	-
Rule	Para	1991	only	-	Oct	 6	0:00	1:00	-
Rule	Para	1992	only	-	Mar	 1	0:00	0	-
Rule	Para	1992	only	-	Oct	 5	0:00	1:00	-
Rule	Para	1993	only	-	Mar	31	0:00	0	-
Rule	Para	1993	1995	-	Oct	 1	0:00	1:00	-
Rule	Para	1994	1995	-	Feb	lastSun	0:00	0	-
Rule	Para	1996	only	-	Mar	 1	0:00	0	-
# IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
# From Steffen Thorsen (2000-10-02):
# I have three independent reports that Paraguay changed to DST this Sunday
# (10-01).
#
# Translated by Gwillim Law (2001-02-27) from
# Noticias, a daily paper in Asunción, Paraguay (2000-10-01):
# http://www.diarionoticias.com.py/011000/nacional/naciona1.htm
# Starting at 0:00 today, the clock will be set forward 60 minutes, in
# fulfillment of Decree No. 7,273 of the Executive Power....  The time change
# system has been operating for several years.  Formerly there was a separate
# decree each year; the new law has the same effect, but permanently.  Every
# year, the time will change on the first Sunday of October; likewise, the
# clock will be set back on the first Sunday of March.
#
Rule	Para	1996	2001	-	Oct	Sun>=1	0:00	1:00	-
# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
Rule	Para	1997	only	-	Feb	lastSun	0:00	0	-
# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
Rule	Para	1998	2001	-	Mar	Sun>=1	0:00	0	-
# From Rives McDow (2002-02-28):
# A decree was issued in Paraguay (No. 16350) on 2002-02-26 that changed the
# dst method to be from the first Sunday in September to the first Sunday in
# April.
Rule	Para	2002	2004	-	Apr	Sun>=1	0:00	0	-
Rule	Para	2002	2003	-	Sep	Sun>=1	0:00	1:00	-
#
# From Jesper Nørgaard Welen (2005-01-02):
# There are several sources that claim that Paraguay made
# a timezone rule change in autumn 2004.
# From Steffen Thorsen (2005-01-05):
# Decree 1,867 (2004-03-05)
# From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13)
# http://www.presidencia.gov.py/decretos/D1867.pdf
Rule	Para	2004	2009	-	Oct	Sun>=15	0:00	1:00	-
Rule	Para	2005	2009	-	Mar	Sun>=8	0:00	0	-
# From Carlos Raúl Perasso (2010-02-18):
# By decree number 3958 issued yesterday
# http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
# Paraguay changes its DST schedule, postponing the March rule to April and
# modifying the October date. The decree reads:
# ...
# Art. 1. It is hereby established that from the second Sunday of the month of
# April of this year (2010), the official time is to be set back 60 minutes,
# and that on the first Sunday of the month of October, it is to be set
# forward 60 minutes, in all the territory of the Paraguayan Republic.
# ...
Rule	Para	2010	2024	-	Oct	Sun>=1	0:00	1:00	-
Rule	Para	2010	2012	-	Apr	Sun>=8	0:00	0	-
#
# From Steffen Thorsen (2013-03-07):
# Paraguay will end DST on 2013-03-24 00:00....
# http://www.ande.gov.py/interna.php?id=1075
#
# From Carlos Raúl Perasso (2013-03-15):
# The change in Paraguay is now final.  Decree number 10780
# http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf
# From Carlos Raúl Perasso (2014-02-28):
# Decree 1264 can be found at:
# http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf
#
# From Paul Eggert (2023-07-26):
# Transition dates are now set by Law No. 7115, not by presidential decree.
# https://www.abc.com.py/politica/2023/07/12/promulgacion-el-cambio-de-hora-sera-por-ley/
# From Carlos Raúl Perasso (2023-07-27):
# http://silpy.congreso.gov.py/descarga/ley-144138
Rule	Para	2013	2024	-	Mar	Sun>=22	0:00	0	-
#
# From Heitor David Pinto (2024-09-24):
# Today the Congress of Paraguay passed a bill to observe UTC-3 permanently....
# The text of the bill says that it would enter into force on the first
# Sunday in October 2024, the same date currently scheduled to start DST....
# https://silpy.congreso.gov.py/web/expediente/132531
# (2024-10-14):
# The president approved the law on 11 October 2024,
# and it was officially published on 14 October 2024.
# https://www.gacetaoficial.gov.py/index/detalle_publicacion/89723
# The text of the law says that it enters into force on the first
# Sunday in October 2024 (6 October 2024).  But the constitution
# prohibits retroactive effect, and the civil code says that laws
# enter into force on the day after their publication or on the day
# that they specify, and it also says that they don't have retroactive
# effect.  So I think that the time change on 6 October 2024 should
# still be considered as DST according to the previous law, and
# permanently UTC-3 from 15 October 2024 according to the new law....
# https://www.constituteproject.org/constitution/Paraguay_2011
# https://www.oas.org/dil/esp/codigo_civil_paraguay.pdf

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Asuncion	-3:50:40 -	LMT	1890
			-3:50:40 -	AMT	1931 Oct 10 # Asunción Mean Time
			-4:00	-	%z	1972 Oct
			-3:00	-	%z	1974 Apr
			-4:00	Para	%z	2024 Oct 15
			-3:00	-	%z

# Peru
#
# From Evelyn C. Leeper via Mark Brader (2003-10-26)
# <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>:
# When we were in Peru in 1985-1986, they apparently switched over
# sometime between December 29 and January 3 while we were on the Amazon.
#
# From Paul Eggert (2006-03-22):
# Shanks & Pottenger don't have this transition.  Assume 1986 was like 1987.

# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Peru	1938	only	-	Jan	 1	0:00	1:00	-
Rule	Peru	1938	only	-	Apr	 1	0:00	0	-
Rule	Peru	1938	1939	-	Sep	lastSun	0:00	1:00	-
Rule	Peru	1939	1940	-	Mar	Sun>=24	0:00	0	-
Rule	Peru	1986	1987	-	Jan	 1	0:00	1:00	-
Rule	Peru	1986	1987	-	Apr	 1	0:00	0	-
Rule	Peru	1990	only	-	Jan	 1	0:00	1:00	-
Rule	Peru	1990	only	-	Apr	 1	0:00	0	-
# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
Rule	Peru	1994	only	-	Jan	 1	0:00	1:00	-
Rule	Peru	1994	only	-	Apr	 1	0:00	0	-
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	America/Lima	-5:08:12 -	LMT	1890
			-5:08:36 -	LMT	1908 Jul 28 # Lima Mean Time?
			-5:00	Peru	%z

# South Georgia
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone Atlantic/South_Georgia -2:26:08 -	LMT	1890 # Grytviken
			-2:00	-	%z

# South Sandwich Is
# uninhabited; scientific personnel have wintered

# Suriname
# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone America/Paramaribo	-3:40:40 -	LMT	1911
			-3:40:52 -	PMT	1935     # Paramaribo Mean Time
			-3:40:36 -	PMT	1945 Oct    # The capital moved?
			-3:30	-	%z	1984 Oct
			-3:00	-	%z

# Uruguay
# From Paul Eggert (1993-11-18):
# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
#
# From Tim Parenti (2018-02-20), per Jeremie Bonjour (2018-01-31) and Michael
# Deckers (2018-02-20):
# ... At least they kept good records...
#
# http://www.armada.mil.uy/ContenidosPDFs/sohma/web/almanaque/almanaque_2018.pdf#page=36
# Page 36 of Almanaque 2018, published by the Oceanography, Hydrography, and
# Meteorology Service of the Uruguayan Navy, seems to give many transitions
# with greater clarity than we've had before.  It directly references many laws
# and decrees which are, in turn, referenced below.  They can be viewed in the
# public archives of the Diario Oficial (in Spanish) at
# http://www.impo.com.uy/diariooficial/
#
# Ley No. 3920 of 1908-06-10 placed the determination of legal time under the
# auspices of the National Institute for the Prediction of Time.  It is unclear
# exactly what offset was used during this period, though Ley No. 7200 of
# 1920-04-23 used the Observatory of the National Meteorological Institute in
# Montevideo (34° 54' 33" S, 56° 12' 45" W) as its reference meridian,
# retarding legal time by 15 minutes 9 seconds from 1920-04-30 24:00,
# resulting in UT-04.  Assume the corresponding LMT of UT-03:44:51 (given on
# page 725 of the Proceedings of the Second Pan-American Scientific Congress,
# 1915-1916) was in use, and merely became official from 1908-06-10.
# https://www.impo.com.uy/diariooficial/1908/06/18/12
# https://www.impo.com.uy/diariooficial/1920/04/27/9
#
# Ley No. 7594 of 1923-06-28 specified legal time as Observatory time advanced
# by 44 minutes 51 seconds (UT-03) "from 30 September to 31 March", and by 14
# minutes 51 seconds (UT-03:30) "the rest of the year"; a message from the
# National Council of Administration the same day, published directly below the
# law in the Diario Oficial, specified the first transition to be 1923-09-30
# 24:00.  This effectively established standard time at UT-03:30 with 30
# minutes DST.  Assume transitions at 24:00 on the specified days until Ley No.
# 7919 of 1926-03-05 ended this arrangement, repealing all "laws and other
# provisions which oppose" it, resulting in year-round UT-03:30; a Resolución
# of 1926-03-11 puts the final transition at 1926-03-31 24:00, the same as it
# would have been under the previous law.
# https://www.impo.com.uy/diariooficial/1923/07/02/2
# https://www.impo.com.uy/diariooficial/1926/03/10/2
# https://www.impo.com.uy/diariooficial/1926/03/18/2
#
# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
Rule	Uruguay	1923	1925	-	Oct	 1	 0:00	0:30	-
Rule	Uruguay	1924	1926	-	Apr	 1	 0:00	0	-
# From Tim Parenti (2018-02-15):
# http://www.impo.com.uy/diariooficial/1933/10/27/6
#
# It appears Ley No. 9122 of 1933 was never published as such in the Diario
# Oficial, but instead appeared as Document 26 in the Diario on Friday
# 1933-10-27 as a decree made Monday 1933-10-23 and filed under the Ministry of
# National Defense.  It reinstituted a DST of 30 minutes (to UT-03) "from the
# last Sunday of October...until the last Saturday of March."  In accordance
# with this provision, the first transition was explicitly specified in Article
# 2 of the decree as Saturday 1933-10-28 at 24:00; that is, Sunday 1933-10-29
# at 00:00.  Assume transitions at 00:00 Sunday throughout.
#
# Departing from the matter-of-fact nature of previous timekeeping laws, the
# 1933 decree "consider[s] the advantages of...the advance of legal time":
#
#   "Whereas: The measure adopted by almost all nations at the time of the last
#    World War still persists in North America and Europe, precisely because of
#    the economic, hygienic, and social advantages derived from such an
#    emergency measure...
#
#    Whereas: The advance of the legal time during the summer seasons, by
#    displacing social activity near sunrise, favors the citizen populations
#    and especially the society that creates and works..."
#
# It further specified that "necessary measures" be taken to ensure that
# "public spectacles finish, in general, before [01:00]."
Rule	Uruguay	1933	1938	-	Oct	lastSun	 0:00	0:30	-
Rule	Uruguay	1934	1941	-	Mar	lastSat	24:00	0	-
# From Tim Parenti (2018-02-15):
# Most of the Rules below, and their contemporaneous Zone lines, have been
# updated simply to match the Almanaque 2018.  Although the document does not
# list exact transition times, midnight transitions were already present in our
# data here for all transitions through 2004-09, and this is both consistent
# with prior transitions and verified in several decrees marked below between
# 1939-09 and 2004-09, wherein the relevant text was typically of the form:
#
#   "From 0 hours on [date], the legal time of the entire Republic will be...
#
#    In accordance with [the preceding], on [previous date] at 24 hours, all
#    clocks throughout the Republic will be [advanced/retarded] by..."
#
# It is possible that there is greater specificity to be found for the Rules
# below, but it is buried in no fewer than 40 different decrees individually
# referenced by the Almanaque for the period from 1939-09 to 2014-09.
# Four-fifths of these were promulgated less than two weeks before taking
# effect; more than half within a week and none more than 5 weeks.  Only the
# handful with comments below have been checked with any thoroughness.
Rule	Uruguay	1939	only	-	Oct	 1	 0:00	0:30	-
Rule	Uruguay	1940	only	-	Oct	27	 0:00	0:30	-
# From Tim Parenti (2018-02-15):
# Decreto 1145 of the Ministry of National Defense, dated 1941-07-26, specified
# UT-03 from Friday 1941-08-01 00:00, citing an "urgent...need to save fuel".
# http://www.impo.com.uy/diariooficial/1941/08/04/1
Rule	Uruguay	1941	only	-	Aug	 1	 0:00	0:30	-
# From Tim Parenti (2018-02-15):
# Decreto 1866 of the Ministry of National Defense, dated 1942-12-09, specified
# further advancement (to UT-02:30) from Sunday 1942-12-13 24:00.  Since clocks
# never went back to UT-03:30 thereafter, this is modeled as advancing standard
# time by 30 minutes to UT-03, while retaining 30 minutes of DST.
# http://www.impo.com.uy/diariooficial/1942/12/16/3
Rule	Uruguay	1942	only	-	Dec	14	 0:00	0:30	-
Rule	Uruguay	1943	only	-	Mar	14	 0:00	0	-
Rule	Uruguay	1959	only	-	May	24	 0:00	0:30	-
Rule	Uruguay	1959	only	-	Nov	15	 0:00	0	-
Rule	Uruguay	1960	only	-	Jan	17	 0:00	1:00	-
Rule	Uruguay	1960	only	-	Mar	 6	 0:00	0	-
Rule	Uruguay	1965	only	-	Apr	 4	 0:00	1:00	-
Rule	Uruguay	1965	only	-	Sep	26	 0:00	0	-
# From Tim Parenti (2018-02-15):
# Decreto 321/968 of 1968-05-25, citing emergency drought measures decreed the
# day before, brought clocks forward 30 minutes from Monday 1968-05-27 00:00.
# http://www.impo.com.uy/diariooficial/1968/05/30/5
Rule	Uruguay	1968	only	-	May	27	 0:00	0:30	-
Rule	Uruguay	1968	only	-	Dec	 1	 0:00	0	-
# From Tim Parenti (2018-02-15):
# Decreto 188/970 of 1970-04-23 instituted restrictions on electricity
# consumption "as a consequence of the current rainfall regime in the country".
# Articles 13 and 14 advanced clocks by an hour from Saturday 1970-04-25 00:00.
# http://www.impo.com.uy/diariooficial/1970/04/29/4
Rule	Uruguay	1970	only	-	Apr	25	 0:00	1:00	-
Rule	Uruguay	1970	only	-	Jun	14	 0:00	0	-
Rule	Uruguay	1972	only	-	Apr	23	 0:00	1:00	-
Rule	Uruguay	1972	only	-	Jul	16	 0:00	0	-
# From Tim Parenti (2018-02-15):
# Decreto 29/974 of 1974-01-11, citing "the international rise in the price of
# oil", advanced clocks by 90 minutes (to UT-01:30).  Decreto 163/974 of
# 1974-03-04 returned 60 of those minutes (to UT-02:30), and the remaining 30
# minutes followed in Decreto 679/974 of 1974-08-29.
# http://www.impo.com.uy/diariooficial/1974/01/22/11
# http://www.impo.com.uy/diariooficial/1974/03/14/3
# http://www.impo.com.uy/diariooficial/1974/09/04/6
Rule	Uruguay	1974	only	-	Jan	13	 0:00	1:30	-
Rule	Uruguay	1974	only	-	Mar	10	 0:00	0:30	-
Rule	Uruguay	1974	only	-	Sep	 1	 0:00	0	-
Rule	Uruguay	1974	only	-	Dec	22	 0:00	1:00	-
Rule	Uruguay	1975	only	-	Mar	30	 0:00	0	-
Rule	Uruguay	1976	only	-	Dec	19	 0:00	1:00	-
Rule	Uruguay	1977	only	-	Mar	 6	 0:00	0	-
Rule	Uruguay	1977	only	-	Dec	 4	 0:00	1:00	-
Rule	Uruguay	1978	1979	-	Mar	Sun>=1	 0:00	0	-
Rule	Uruguay	1978	only	-	Dec	17	 0:00	1:00	-
Rule	Uruguay	1979	only	-	Apr	29	 0:00	1:00	-
Rule	Uruguay	1980	only	-	Mar	16	 0:00	0	-
# From Tim Parenti (2018-02-15):
# Decreto 725/987 of 1987-12-04 cited "better use of national tourist
# attractions" to advance clocks one hour from Monday 1987-12-14 00:00.
# http://www.impo.com.uy/diariooficial/1988/01/25/1
Rule	Uruguay	1987	only	-	Dec	14	 0:00	1:00	-
Rule	Uruguay	1988	only	-	Feb	28	 0:00	0	-
Rule	Uruguay	1988	only	-	Dec	11	 0:00	1:00	-
Rule	Uruguay	1989	only	-	Mar	 5	 0:00	0	-
Rule	Uruguay	1989	only	-	Oct	29	 0:00	1:00	-
Rule	Uruguay	1990	only	-	Feb	25	 0:00	0	-
# From Tim Parenti (2018-02-15), per Paul Eggert (1999-11-04):
# IATA agrees as below for 1990-10 through 1993-02.  Per Almanaque 2018, the
# 1992/1993 season appears to be the first in over half a century where DST
# both began and ended pursuant to the same decree.
Rule	Uruguay	1990	1991	-	Oct	Sun>=21	 0:00	1:00	-
Rule	Uruguay	1991	1992	-	Mar	Sun>=1	 0:00	0	-
Rule	Uruguay	1992	only	-	Oct	18	 0:00	1:00	-
Rule	Uruguay	1993	only	-	Feb	28	 0:00	0	-
# From Eduardo Cota (2004-09-20):
# The Uruguayan government has decreed a change in the local time....
# From Tim Parenti (2018-02-15):
# Decreto 328/004 of 2004-09-15.
# http://www.impo.com.uy/diariooficial/2004/09/23/documentos.pdf#page=1
Rule	Uruguay	2004	only	-	Sep	19	 0:00	1:00	-
# From Steffen Thorsen (2005-03-11):
# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
# save energy ... it was postponed two weeks....
# From Tim Parenti (2018-02-15):
# This 2005 postponement is not in Almanaque 2018.  Go with the contemporaneous
# reporting, which is confirmed by Decreto 107/005 of 2005-03-10 amending
# Decreto 328/004:
# http://www.impo.com.uy/diariooficial/2005/03/15/documentos.pdf#page=1
# The original decree specified a transition of 2005-03-12 24:00, but the new
# one specified 2005-03-27 02:00.
Rule	Uruguay	2005	only	-	Mar	27	 2:00	0	-
# From Eduardo Cota (2005-09-27):
# ...from 2005-10-09 at 02:00 local time, until 2006-03-12 at 02:00 local time,
# official time in Uruguay will be at GMT -2.
# From Tim Parenti (2018-02-15):
# Decreto 318/005 of 2005-09-19.
# http://www.impo.com.uy/diariooficial/2005/09/23/documentos.pdf#page=1
Rule	Uruguay	2005	only	-	Oct	 9	 2:00	1:00	-
Rule	Uruguay	2006	2015	-	Mar	Sun>=8	 2:00	0	-
# From Tim Parenti (2018-02-15), per Jesper Nørgaard Welen (2006-09-06):
# Decreto 311/006 of 2006-09-04 established regular DST from the first Sunday
# of October at 02:00 through the second Sunday of March at 02:00.  Almanaque
# 2018 appears to have a few typoed dates through this period; ignore them.
# http://www.impo.com.uy/diariooficial/2006/09/08/documentos.pdf#page=1
Rule	Uruguay	2006	2014	-	Oct	Sun>=1	 2:00	1:00	-
# From Steffen Thorsen (2015-06-30):
# ... it looks like they will not be using DST the coming summer:
# http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787
# http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/
# From Paul Eggert (2015-06-30):
# Apparently restaurateurs complained that DST caused people to go to the beach
# instead of out to dinner.
# From Pablo Camargo (2015-07-13):
# http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf
# From Tim Parenti (2018-02-15):
# Decreto 178/015 of 2015-06-29; repeals Decreto 311/006.

# This Zone can be simplified once we assume zic %z.
Zone America/Montevideo	-3:44:51 -	LMT	1908 Jun 10
			-3:44:51 -	MMT	1920 May  1 # Montevideo MT
			-4:00	-	%z	1923 Oct  1
			-3:30	Uruguay	%z	1942 Dec 14
			-3:00	Uruguay	%z	1960
			-3:00	Uruguay	%z	1968
			-3:00	Uruguay	%z	1970
			-3:00	Uruguay	%z	1974
			-3:00	Uruguay	%z	1974 Mar 10
			-3:00	Uruguay	%z	1974 Dec 22
			-3:00	Uruguay	%z

# Venezuela
#
# From Paul Eggert (2015-07-28):
# For the 1965 transition see Gaceta Oficial No. 27.619 (1964-12-15), p 205.533
# http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf
#
# From John Stainforth (2007-11-28):
# ... the change for Venezuela originally expected for 2007-12-31 has
# been brought forward to 2007-12-09.  The official announcement was
# published today in the "Gaceta Oficial de la República Bolivariana
# de Venezuela, número 38.819" (official document for all laws or
# resolution publication)
# http://www.globovision.com/news.php?nid=72208

# From Alexander Krivenyshev (2016-04-15):
# https://actualidad.rt.com/actualidad/204758-venezuela-modificar-huso-horario-sequia-elnino
#
# From Paul Eggert (2016-04-15):
# Clocks advance 30 minutes on 2016-05-01 at 02:30....
# "'Venezuela's new time-zone: hours without light, hours without water,
# hours of presidential broadcasts, hours of lines,' quipped comedian
# Jean Mary Curró ...". See: Cawthorne A, Kai D. Venezuela scraps
# half-hour time difference set by Chavez. Reuters 2016-04-15 14:50 -0400
# https://www.reuters.com/article/us-venezuela-timezone-idUSKCN0XC2BE
#
# From Matt Johnson (2016-04-20):
# ... published in the official Gazette [2016-04-18], here:
# http://historico.tsj.gob.ve/gaceta_ext/abril/1842016/E-1842016-4551.pdf

# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
Zone	America/Caracas	-4:27:44 -	LMT	1890
			-4:27:40 -	CMT	1912 Feb 12 # Caracas Mean Time?
			-4:30	-	%z	1965 Jan  1  0:00
			-4:00	-	%z	2007 Dec  9  3:00
			-4:30	-	%z	2016 May  1  2:30
			-4:00	-	%z
# tzdb data for System V rules (this file is obsolete)

# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.

# Old rules, should the need arise.
# No attempt is made to handle Newfoundland, since it cannot be expressed
# using the System V "TZ" scheme (half-hour offset), or anything outside
# North America (no support for non-standard DST start/end dates), nor
# the changes in the DST rules in the US after 1976 (which occurred after
# the old rules were written).
#
# If you need the old rules, uncomment ## lines.
# Compile this *without* leap second correction for true conformance.

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	SystemV	min	1973	-	Apr	lastSun	2:00	1:00	D
Rule	SystemV	min	1973	-	Oct	lastSun	2:00	0	S
Rule	SystemV	1974	only	-	Jan	6	2:00	1:00	D
Rule	SystemV	1974	only	-	Nov	lastSun	2:00	0	S
Rule	SystemV	1975	only	-	Feb	23	2:00	1:00	D
Rule	SystemV	1975	only	-	Oct	lastSun	2:00	0	S
Rule	SystemV	1976	max	-	Apr	lastSun	2:00	1:00	D
Rule	SystemV	1976	max	-	Oct	lastSun	2:00	0	S

# Zone	NAME		STDOFF	RULES/SAVE	FORMAT	[UNTIL]
## Zone	SystemV/AST4ADT	-4:00	SystemV		A%sT
## Zone	SystemV/EST5EDT	-5:00	SystemV		E%sT
## Zone	SystemV/CST6CDT	-6:00	SystemV		C%sT
## Zone	SystemV/MST7MDT	-7:00	SystemV		M%sT
## Zone	SystemV/PST8PDT	-8:00	SystemV		P%sT
## Zone	SystemV/YST9YDT	-9:00	SystemV		Y%sT
## Zone	SystemV/AST4	-4:00	-		AST
## Zone	SystemV/EST5	-5:00	-		EST
## Zone	SystemV/CST6	-6:00	-		CST
## Zone	SystemV/MST7	-7:00	-		MST
## Zone	SystemV/PST8	-8:00	-		PST
## Zone	SystemV/YST9	-9:00	-		YST
## Zone	SystemV/HST10	-10:00	-		HST
#!/usr/bin/ksh
#
# This file and its contents are supplied under the terms of the
# Common Development and Distribution License ("CDDL"), version 1.0.
# You may only use this file in accordance with the terms of version
# 1.0 of the CDDL.
#
# A full copy of the text of the CDDL should have accompanied this
# source. A copy of the CDDL is also available via the Internet at
# http://www.illumos.org/license/CDDL.

# Copyright 2021 OmniOS Community Edition (OmniOSce) Association.

set -o errexit -o pipefail
trap 'echo Error occured at line $LINENO' ERR

if [[ ! -v CODEMGR_WS ]] || (($# < 1)); then
	cat <<- EOM
This script should be run within a bldenv by issuing 'make update' in
\$CODEMGR_WS/usr/src/data/zoneinfo
	EOM
	exit 1
fi

MANIFEST=$CODEMGR_WS/usr/src/pkg/manifests/system-data-zoneinfo.p5m
PREFIX=usr/share/lib/zoneinfo

if [[ ! -f "$MANIFEST" ]]; then
	echo "Could not find $MANIFEST"
	exit 1
fi

function find_cmd {
	typeset cmd="$1"
	typeset var=$(echo $cmd | tr '[:lower:]' '[:upper:]')
	typeset -n path="$var"
	path=$(whence -fp "$cmd")
	if (($? != 0)) || [ ! -x "$path" ]; then
		echo "Cannot find executable '$cmd' in PATH"
		exit 1
	fi
}

# This script uses a few commands which are not part of illumos and are
# expected to be available in the path.
find_cmd pkgfmt

typeset -A links
typeset -A targets
for f in "$@"; do
	if [[ ! -r "$f" ]]; then
		echo "Could not read $f"
		exit 1
	fi
	echo "+++ Processing input file $f"
	grep '^Link' "$f" | tr -s '[:space:]' | \
	    while IFS=$' \t' read _ tgt src _; do

		osrc=$src
		targets[$tgt]=1

		printf "    %20s => %s\n" $src $tgt

		while [[ $src == */* && ${src%%/*} == ${tgt%%/*} ]]; do
			src=${src#*/}
			tgt=${tgt#*/}
		done

		# On no matches, grep -o exits non-zero, hence the || true to
		# satisfy the shell's errexit option.
		sslashes=$(echo $src | grep -o / | wc -l || true)
		r=
		while ((sslashes-- > 0)); do
			r+="../"
		done
		links[$osrc]="$r$tgt"
	done
done

tmpf1=`mktemp`
tmpf2=`mktemp`
trap 'rm -f $tmpf1 $tmpf2' EXIT
[[ -n "$tmpf1" && -f "$tmpf1" ]]
[[ -n "$tmpf2" && -f "$tmpf2" ]]

cp $MANIFEST $tmpf1
$PKGFMT -u $tmpf1

echo "+++ Removing existing hardlinks from manifest"
egrep -v "^hardlink " $tmpf1 > $tmpf2
mv $tmpf2 $tmpf1

echo "+++ Removing existing targets from manifest"
for i in "${!links[@]}" "${!targets[@]}"; do
	egrep -v "^file path=$PREFIX/$i\$" $tmpf1 > $tmpf2
	mv $tmpf2 $tmpf1
done

echo "+++ Adding new entries to manifest"
{
	for i in "${!targets[@]}"; do
		echo "file path=$PREFIX/$i"
	done
	for i in "${!links[@]}"; do
		echo "hardlink path=$PREFIX/$i target=${links[$i]}"
	done
} >> $tmpf1

echo "+++ Formatting manifest"
$PKGFMT -fv2 $tmpf1

mv $tmpf1 $MANIFEST

# tzdb timezone descriptions (deprecated version)
#
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
#
# From Paul Eggert (2021-09-20):
# This file is intended as a backward-compatibility aid for older programs.
# New programs should use zone1970.tab.  This file is like zone1970.tab (see
# zone1970.tab's comments), but with the following additional restrictions:
#
# 1.  This file contains only ASCII characters.
# 2.  The first data column contains exactly one country code.
#
# Because of (2), each row stands for an area that is the intersection
# of a region identified by a country code and of a timezone where civil
# clocks have agreed since 1970; this is a narrower definition than
# that of zone1970.tab.
#
# Unlike zone1970.tab, a row's third column can be a Link from
# 'backward' instead of a Zone.
#
# This table is intended as an aid for users, to help them select timezones
# appropriate for their practical needs.  It is not intended to take or
# endorse any position on legal or territorial claims.
#
#country-
#code	coordinates	TZ			comments
AD	+4230+00131	Europe/Andorra
AE	+2518+05518	Asia/Dubai
AF	+3431+06912	Asia/Kabul
AG	+1703-06148	America/Antigua
AI	+1812-06304	America/Anguilla
AL	+4120+01950	Europe/Tirane
AM	+4011+04430	Asia/Yerevan
AO	-0848+01314	Africa/Luanda
AQ	-7750+16636	Antarctica/McMurdo	New Zealand time - McMurdo, South Pole
AQ	-6617+11031	Antarctica/Casey	Casey
AQ	-6835+07758	Antarctica/Davis	Davis
AQ	-6640+14001	Antarctica/DumontDUrville	Dumont-d'Urville
AQ	-6736+06253	Antarctica/Mawson	Mawson
AQ	-6448-06406	Antarctica/Palmer	Palmer
AQ	-6734-06808	Antarctica/Rothera	Rothera
AQ	-690022+0393524	Antarctica/Syowa	Syowa
AQ	-720041+0023206	Antarctica/Troll	Troll
AQ	-7824+10654	Antarctica/Vostok	Vostok
AR	-3436-05827	America/Argentina/Buenos_Aires	Buenos Aires (BA, CF)
AR	-3124-06411	America/Argentina/Cordoba	Argentina (most areas: CB, CC, CN, ER, FM, MN, SE, SF)
AR	-2447-06525	America/Argentina/Salta	Salta (SA, LP, NQ, RN)
AR	-2411-06518	America/Argentina/Jujuy	Jujuy (JY)
AR	-2649-06513	America/Argentina/Tucuman	Tucuman (TM)
AR	-2828-06547	America/Argentina/Catamarca	Catamarca (CT), Chubut (CH)
AR	-2926-06651	America/Argentina/La_Rioja	La Rioja (LR)
AR	-3132-06831	America/Argentina/San_Juan	San Juan (SJ)
AR	-3253-06849	America/Argentina/Mendoza	Mendoza (MZ)
AR	-3319-06621	America/Argentina/San_Luis	San Luis (SL)
AR	-5138-06913	America/Argentina/Rio_Gallegos	Santa Cruz (SC)
AR	-5448-06818	America/Argentina/Ushuaia	Tierra del Fuego (TF)
AS	-1416-17042	Pacific/Pago_Pago
AT	+4813+01620	Europe/Vienna
AU	-3133+15905	Australia/Lord_Howe	Lord Howe Island
AU	-5430+15857	Antarctica/Macquarie	Macquarie Island
AU	-4253+14719	Australia/Hobart	Tasmania
AU	-3749+14458	Australia/Melbourne	Victoria
AU	-3352+15113	Australia/Sydney	New South Wales (most areas)
AU	-3157+14127	Australia/Broken_Hill	New South Wales (Yancowinna)
AU	-2728+15302	Australia/Brisbane	Queensland (most areas)
AU	-2016+14900	Australia/Lindeman	Queensland (Whitsunday Islands)
AU	-3455+13835	Australia/Adelaide	South Australia
AU	-1228+13050	Australia/Darwin	Northern Territory
AU	-3157+11551	Australia/Perth	Western Australia (most areas)
AU	-3143+12852	Australia/Eucla	Western Australia (Eucla)
AW	+1230-06958	America/Aruba
AX	+6006+01957	Europe/Mariehamn
AZ	+4023+04951	Asia/Baku
BA	+4352+01825	Europe/Sarajevo
BB	+1306-05937	America/Barbados
BD	+2343+09025	Asia/Dhaka
BE	+5050+00420	Europe/Brussels
BF	+1222-00131	Africa/Ouagadougou
BG	+4241+02319	Europe/Sofia
BH	+2623+05035	Asia/Bahrain
BI	-0323+02922	Africa/Bujumbura
BJ	+0629+00237	Africa/Porto-Novo
BL	+1753-06251	America/St_Barthelemy
BM	+3217-06446	Atlantic/Bermuda
BN	+0456+11455	Asia/Brunei
BO	-1630-06809	America/La_Paz
BQ	+120903-0681636	America/Kralendijk
BR	-0351-03225	America/Noronha	Atlantic islands
BR	-0127-04829	America/Belem	Para (east), Amapa
BR	-0343-03830	America/Fortaleza	Brazil (northeast: MA, PI, CE, RN, PB)
BR	-0803-03454	America/Recife	Pernambuco
BR	-0712-04812	America/Araguaina	Tocantins
BR	-0940-03543	America/Maceio	Alagoas, Sergipe
BR	-1259-03831	America/Bahia	Bahia
BR	-2332-04637	America/Sao_Paulo	Brazil (southeast: GO, DF, MG, ES, RJ, SP, PR, SC, RS)
BR	-2027-05437	America/Campo_Grande	Mato Grosso do Sul
BR	-1535-05605	America/Cuiaba	Mato Grosso
BR	-0226-05452	America/Santarem	Para (west)
BR	-0846-06354	America/Porto_Velho	Rondonia
BR	+0249-06040	America/Boa_Vista	Roraima
BR	-0308-06001	America/Manaus	Amazonas (east)
BR	-0640-06952	America/Eirunepe	Amazonas (west)
BR	-0958-06748	America/Rio_Branco	Acre
BS	+2505-07721	America/Nassau
BT	+2728+08939	Asia/Thimphu
BW	-2439+02555	Africa/Gaborone
BY	+5354+02734	Europe/Minsk
BZ	+1730-08812	America/Belize
CA	+4734-05243	America/St_Johns	Newfoundland, Labrador (SE)
CA	+4439-06336	America/Halifax	Atlantic - NS (most areas), PE
CA	+4612-05957	America/Glace_Bay	Atlantic - NS (Cape Breton)
CA	+4606-06447	America/Moncton	Atlantic - New Brunswick
CA	+5320-06025	America/Goose_Bay	Atlantic - Labrador (most areas)
CA	+5125-05707	America/Blanc-Sablon	AST - QC (Lower North Shore)
CA	+4339-07923	America/Toronto	Eastern - ON & QC (most areas)
CA	+6344-06828	America/Iqaluit	Eastern - NU (most areas)
CA	+484531-0913718	America/Atikokan	EST - ON (Atikokan), NU (Coral H)
CA	+4953-09709	America/Winnipeg	Central - ON (west), Manitoba
CA	+744144-0944945	America/Resolute	Central - NU (Resolute)
CA	+624900-0920459	America/Rankin_Inlet	Central - NU (central)
CA	+5024-10439	America/Regina	CST - SK (most areas)
CA	+5017-10750	America/Swift_Current	CST - SK (midwest)
CA	+5333-11328	America/Edmonton	Mountain - AB, BC(E), NT(E), SK(W)
CA	+690650-1050310	America/Cambridge_Bay	Mountain - NU (west)
CA	+682059-1334300	America/Inuvik	Mountain - NT (west)
CA	+4906-11631	America/Creston	MST - BC (Creston)
CA	+5546-12014	America/Dawson_Creek	MST - BC (Dawson Cr, Ft St John)
CA	+5848-12242	America/Fort_Nelson	MST - BC (Ft Nelson)
CA	+6043-13503	America/Whitehorse	MST - Yukon (east)
CA	+6404-13925	America/Dawson	MST - Yukon (west)
CA	+4916-12307	America/Vancouver	Pacific - BC (most areas)
CC	-1210+09655	Indian/Cocos
CD	-0418+01518	Africa/Kinshasa	Dem. Rep. of Congo (west)
CD	-1140+02728	Africa/Lubumbashi	Dem. Rep. of Congo (east)
CF	+0422+01835	Africa/Bangui
CG	-0416+01517	Africa/Brazzaville
CH	+4723+00832	Europe/Zurich
CI	+0519-00402	Africa/Abidjan
CK	-2114-15946	Pacific/Rarotonga
CL	-3327-07040	America/Santiago	most of Chile
CL	-4534-07204	America/Coyhaique	Aysen Region
CL	-5309-07055	America/Punta_Arenas	Magallanes Region
CL	-2709-10926	Pacific/Easter	Easter Island
CM	+0403+00942	Africa/Douala
CN	+3114+12128	Asia/Shanghai	Beijing Time
CN	+4348+08735	Asia/Urumqi	Xinjiang Time
CO	+0436-07405	America/Bogota
CR	+0956-08405	America/Costa_Rica
CU	+2308-08222	America/Havana
CV	+1455-02331	Atlantic/Cape_Verde
CW	+1211-06900	America/Curacao
CX	-1025+10543	Indian/Christmas
CY	+3510+03322	Asia/Nicosia	most of Cyprus
CY	+3507+03357	Asia/Famagusta	Northern Cyprus
CZ	+5005+01426	Europe/Prague
DE	+5230+01322	Europe/Berlin	most of Germany
DE	+4742+00841	Europe/Busingen	Busingen
DJ	+1136+04309	Africa/Djibouti
DK	+5540+01235	Europe/Copenhagen
DM	+1518-06124	America/Dominica
DO	+1828-06954	America/Santo_Domingo
DZ	+3647+00303	Africa/Algiers
EC	-0210-07950	America/Guayaquil	Ecuador (mainland)
EC	-0054-08936	Pacific/Galapagos	Galapagos Islands
EE	+5925+02445	Europe/Tallinn
EG	+3003+03115	Africa/Cairo
EH	+2709-01312	Africa/El_Aaiun
ER	+1520+03853	Africa/Asmara
ES	+4024-00341	Europe/Madrid	Spain (mainland)
ES	+3553-00519	Africa/Ceuta	Ceuta, Melilla
ES	+2806-01524	Atlantic/Canary	Canary Islands
ET	+0902+03842	Africa/Addis_Ababa
FI	+6010+02458	Europe/Helsinki
FJ	-1808+17825	Pacific/Fiji
FK	-5142-05751	Atlantic/Stanley
FM	+0725+15147	Pacific/Chuuk	Chuuk/Truk, Yap
FM	+0658+15813	Pacific/Pohnpei	Pohnpei/Ponape
FM	+0519+16259	Pacific/Kosrae	Kosrae
FO	+6201-00646	Atlantic/Faroe
FR	+4852+00220	Europe/Paris
GA	+0023+00927	Africa/Libreville
GB	+513030-0000731	Europe/London
GD	+1203-06145	America/Grenada
GE	+4143+04449	Asia/Tbilisi
GF	+0456-05220	America/Cayenne
GG	+492717-0023210	Europe/Guernsey
GH	+0533-00013	Africa/Accra
GI	+3608-00521	Europe/Gibraltar
GL	+6411-05144	America/Nuuk	most of Greenland
GL	+7646-01840	America/Danmarkshavn	National Park (east coast)
GL	+7029-02158	America/Scoresbysund	Scoresbysund/Ittoqqortoormiit
GL	+7634-06847	America/Thule	Thule/Pituffik
GM	+1328-01639	Africa/Banjul
GN	+0931-01343	Africa/Conakry
GP	+1614-06132	America/Guadeloupe
GQ	+0345+00847	Africa/Malabo
GR	+3758+02343	Europe/Athens
GS	-5416-03632	Atlantic/South_Georgia
GT	+1438-09031	America/Guatemala
GU	+1328+14445	Pacific/Guam
GW	+1151-01535	Africa/Bissau
GY	+0648-05810	America/Guyana
HK	+2217+11409	Asia/Hong_Kong
HN	+1406-08713	America/Tegucigalpa
HR	+4548+01558	Europe/Zagreb
HT	+1832-07220	America/Port-au-Prince
HU	+4730+01905	Europe/Budapest
ID	-0610+10648	Asia/Jakarta	Java, Sumatra
ID	-0002+10920	Asia/Pontianak	Borneo (west, central)
ID	-0507+11924	Asia/Makassar	Borneo (east, south), Sulawesi/Celebes, Bali, Nusa Tengarra, Timor (west)
ID	-0232+14042	Asia/Jayapura	New Guinea (West Papua / Irian Jaya), Malukus/Moluccas
IE	+5320-00615	Europe/Dublin
IL	+314650+0351326	Asia/Jerusalem
IM	+5409-00428	Europe/Isle_of_Man
IN	+2232+08822	Asia/Kolkata
IO	-0720+07225	Indian/Chagos
IQ	+3321+04425	Asia/Baghdad
IR	+3540+05126	Asia/Tehran
IS	+6409-02151	Atlantic/Reykjavik
IT	+4154+01229	Europe/Rome
JE	+491101-0020624	Europe/Jersey
JM	+175805-0764736	America/Jamaica
JO	+3157+03556	Asia/Amman
JP	+353916+1394441	Asia/Tokyo
KE	-0117+03649	Africa/Nairobi
KG	+4254+07436	Asia/Bishkek
KH	+1133+10455	Asia/Phnom_Penh
KI	+0125+17300	Pacific/Tarawa	Gilbert Islands
KI	-0247-17143	Pacific/Kanton	Phoenix Islands
KI	+0152-15720	Pacific/Kiritimati	Line Islands
KM	-1141+04316	Indian/Comoro
KN	+1718-06243	America/St_Kitts
KP	+3901+12545	Asia/Pyongyang
KR	+3733+12658	Asia/Seoul
KW	+2920+04759	Asia/Kuwait
KY	+1918-08123	America/Cayman
KZ	+4315+07657	Asia/Almaty	most of Kazakhstan
KZ	+4448+06528	Asia/Qyzylorda	Qyzylorda/Kyzylorda/Kzyl-Orda
KZ	+5312+06337	Asia/Qostanay	Qostanay/Kostanay/Kustanay
KZ	+5017+05710	Asia/Aqtobe	Aqtobe/Aktobe
KZ	+4431+05016	Asia/Aqtau	Mangghystau/Mankistau
KZ	+4707+05156	Asia/Atyrau	Atyrau/Atirau/Gur'yev
KZ	+5113+05121	Asia/Oral	West Kazakhstan
LA	+1758+10236	Asia/Vientiane
LB	+3353+03530	Asia/Beirut
LC	+1401-06100	America/St_Lucia
LI	+4709+00931	Europe/Vaduz
LK	+0656+07951	Asia/Colombo
LR	+0618-01047	Africa/Monrovia
LS	-2928+02730	Africa/Maseru
LT	+5441+02519	Europe/Vilnius
LU	+4936+00609	Europe/Luxembourg
LV	+5657+02406	Europe/Riga
LY	+3254+01311	Africa/Tripoli
MA	+3339-00735	Africa/Casablanca
MC	+4342+00723	Europe/Monaco
MD	+4700+02850	Europe/Chisinau
ME	+4226+01916	Europe/Podgorica
MF	+1804-06305	America/Marigot
MG	-1855+04731	Indian/Antananarivo
MH	+0709+17112	Pacific/Majuro	most of Marshall Islands
MH	+0905+16720	Pacific/Kwajalein	Kwajalein
MK	+4159+02126	Europe/Skopje
ML	+1239-00800	Africa/Bamako
MM	+1647+09610	Asia/Yangon
MN	+4755+10653	Asia/Ulaanbaatar	most of Mongolia
MN	+4801+09139	Asia/Hovd	Bayan-Olgii, Hovd, Uvs
MO	+221150+1133230	Asia/Macau
MP	+1512+14545	Pacific/Saipan
MQ	+1436-06105	America/Martinique
MR	+1806-01557	Africa/Nouakchott
MS	+1643-06213	America/Montserrat
MT	+3554+01431	Europe/Malta
MU	-2010+05730	Indian/Mauritius
MV	+0410+07330	Indian/Maldives
MW	-1547+03500	Africa/Blantyre
MX	+1924-09909	America/Mexico_City	Central Mexico
MX	+2105-08646	America/Cancun	Quintana Roo
MX	+2058-08937	America/Merida	Campeche, Yucatan
MX	+2540-10019	America/Monterrey	Durango; Coahuila, Nuevo Leon, Tamaulipas (most areas)
MX	+2550-09730	America/Matamoros	Coahuila, Nuevo Leon, Tamaulipas (US border)
MX	+2838-10605	America/Chihuahua	Chihuahua (most areas)
MX	+3144-10629	America/Ciudad_Juarez	Chihuahua (US border - west)
MX	+2934-10425	America/Ojinaga	Chihuahua (US border - east)
MX	+2313-10625	America/Mazatlan	Baja California Sur, Nayarit (most areas), Sinaloa
MX	+2048-10515	America/Bahia_Banderas	Bahia de Banderas
MX	+2904-11058	America/Hermosillo	Sonora
MX	+3232-11701	America/Tijuana	Baja California
MY	+0310+10142	Asia/Kuala_Lumpur	Malaysia (peninsula)
MY	+0133+11020	Asia/Kuching	Sabah, Sarawak
MZ	-2558+03235	Africa/Maputo
NA	-2234+01706	Africa/Windhoek
NC	-2216+16627	Pacific/Noumea
NE	+1331+00207	Africa/Niamey
NF	-2903+16758	Pacific/Norfolk
NG	+0627+00324	Africa/Lagos
NI	+1209-08617	America/Managua
NL	+5222+00454	Europe/Amsterdam
NO	+5955+01045	Europe/Oslo
NP	+2743+08519	Asia/Kathmandu
NR	-0031+16655	Pacific/Nauru
NU	-1901-16955	Pacific/Niue
NZ	-3652+17446	Pacific/Auckland	most of New Zealand
NZ	-4357-17633	Pacific/Chatham	Chatham Islands
OM	+2336+05835	Asia/Muscat
PA	+0858-07932	America/Panama
PE	-1203-07703	America/Lima
PF	-1732-14934	Pacific/Tahiti	Society Islands
PF	-0900-13930	Pacific/Marquesas	Marquesas Islands
PF	-2308-13457	Pacific/Gambier	Gambier Islands
PG	-0930+14710	Pacific/Port_Moresby	most of Papua New Guinea
PG	-0613+15534	Pacific/Bougainville	Bougainville
PH	+143512+1205804	Asia/Manila
PK	+2452+06703	Asia/Karachi
PL	+5215+02100	Europe/Warsaw
PM	+4703-05620	America/Miquelon
PN	-2504-13005	Pacific/Pitcairn
PR	+182806-0660622	America/Puerto_Rico
PS	+3130+03428	Asia/Gaza	Gaza Strip
PS	+313200+0350542	Asia/Hebron	West Bank
PT	+3843-00908	Europe/Lisbon	Portugal (mainland)
PT	+3238-01654	Atlantic/Madeira	Madeira Islands
PT	+3744-02540	Atlantic/Azores	Azores
PW	+0720+13429	Pacific/Palau
PY	-2516-05740	America/Asuncion
QA	+2517+05132	Asia/Qatar
RE	-2052+05528	Indian/Reunion
RO	+4426+02606	Europe/Bucharest
RS	+4450+02030	Europe/Belgrade
RU	+5443+02030	Europe/Kaliningrad	MSK-01 - Kaliningrad
RU	+554521+0373704	Europe/Moscow	MSK+00 - Moscow area
# The obsolescent zone.tab format cannot represent Europe/Simferopol well.
# Put it in RU section and list as UA.  See "territorial claims" above.
# Programs should use zone1970.tab instead; see above.
UA	+4457+03406	Europe/Simferopol	Crimea
RU	+5836+04939	Europe/Kirov	MSK+00 - Kirov
RU	+4844+04425	Europe/Volgograd	MSK+00 - Volgograd
RU	+4621+04803	Europe/Astrakhan	MSK+01 - Astrakhan
RU	+5134+04602	Europe/Saratov	MSK+01 - Saratov
RU	+5420+04824	Europe/Ulyanovsk	MSK+01 - Ulyanovsk
RU	+5312+05009	Europe/Samara	MSK+01 - Samara, Udmurtia
RU	+5651+06036	Asia/Yekaterinburg	MSK+02 - Urals
RU	+5500+07324	Asia/Omsk	MSK+03 - Omsk
RU	+5502+08255	Asia/Novosibirsk	MSK+04 - Novosibirsk
RU	+5322+08345	Asia/Barnaul	MSK+04 - Altai
RU	+5630+08458	Asia/Tomsk	MSK+04 - Tomsk
RU	+5345+08707	Asia/Novokuznetsk	MSK+04 - Kemerovo
RU	+5601+09250	Asia/Krasnoyarsk	MSK+04 - Krasnoyarsk area
RU	+5216+10420	Asia/Irkutsk	MSK+05 - Irkutsk, Buryatia
RU	+5203+11328	Asia/Chita	MSK+06 - Zabaykalsky
RU	+6200+12940	Asia/Yakutsk	MSK+06 - Lena River
RU	+623923+1353314	Asia/Khandyga	MSK+06 - Tomponsky, Ust-Maysky
RU	+4310+13156	Asia/Vladivostok	MSK+07 - Amur River
RU	+643337+1431336	Asia/Ust-Nera	MSK+07 - Oymyakonsky
RU	+5934+15048	Asia/Magadan	MSK+08 - Magadan
RU	+4658+14242	Asia/Sakhalin	MSK+08 - Sakhalin Island
RU	+6728+15343	Asia/Srednekolymsk	MSK+08 - Sakha (E), N Kuril Is
RU	+5301+15839	Asia/Kamchatka	MSK+09 - Kamchatka
RU	+6445+17729	Asia/Anadyr	MSK+09 - Bering Sea
RW	-0157+03004	Africa/Kigali
SA	+2438+04643	Asia/Riyadh
SB	-0932+16012	Pacific/Guadalcanal
SC	-0440+05528	Indian/Mahe
SD	+1536+03232	Africa/Khartoum
SE	+5920+01803	Europe/Stockholm
SG	+0117+10351	Asia/Singapore
SH	-1555-00542	Atlantic/St_Helena
SI	+4603+01431	Europe/Ljubljana
SJ	+7800+01600	Arctic/Longyearbyen
SK	+4809+01707	Europe/Bratislava
SL	+0830-01315	Africa/Freetown
SM	+4355+01228	Europe/San_Marino
SN	+1440-01726	Africa/Dakar
SO	+0204+04522	Africa/Mogadishu
SR	+0550-05510	America/Paramaribo
SS	+0451+03137	Africa/Juba
ST	+0020+00644	Africa/Sao_Tome
SV	+1342-08912	America/El_Salvador
SX	+180305-0630250	America/Lower_Princes
SY	+3330+03618	Asia/Damascus
SZ	-2618+03106	Africa/Mbabane
TC	+2128-07108	America/Grand_Turk
TD	+1207+01503	Africa/Ndjamena
TF	-492110+0701303	Indian/Kerguelen
TG	+0608+00113	Africa/Lome
TH	+1345+10031	Asia/Bangkok
TJ	+3835+06848	Asia/Dushanbe
TK	-0922-17114	Pacific/Fakaofo
TL	-0833+12535	Asia/Dili
TM	+3757+05823	Asia/Ashgabat
TN	+3648+01011	Africa/Tunis
TO	-210800-1751200	Pacific/Tongatapu
TR	+4101+02858	Europe/Istanbul
TT	+1039-06131	America/Port_of_Spain
TV	-0831+17913	Pacific/Funafuti
TW	+2503+12130	Asia/Taipei
TZ	-0648+03917	Africa/Dar_es_Salaam
UA	+5026+03031	Europe/Kyiv	most of Ukraine
UG	+0019+03225	Africa/Kampala
UM	+2813-17722	Pacific/Midway	Midway Islands
UM	+1917+16637	Pacific/Wake	Wake Island
US	+404251-0740023	America/New_York	Eastern (most areas)
US	+421953-0830245	America/Detroit	Eastern - MI (most areas)
US	+381515-0854534	America/Kentucky/Louisville	Eastern - KY (Louisville area)
US	+364947-0845057	America/Kentucky/Monticello	Eastern - KY (Wayne)
US	+394606-0860929	America/Indiana/Indianapolis	Eastern - IN (most areas)
US	+384038-0873143	America/Indiana/Vincennes	Eastern - IN (Da, Du, K, Mn)
US	+410305-0863611	America/Indiana/Winamac	Eastern - IN (Pulaski)
US	+382232-0862041	America/Indiana/Marengo	Eastern - IN (Crawford)
US	+382931-0871643	America/Indiana/Petersburg	Eastern - IN (Pike)
US	+384452-0850402	America/Indiana/Vevay	Eastern - IN (Switzerland)
US	+415100-0873900	America/Chicago	Central (most areas)
US	+375711-0864541	America/Indiana/Tell_City	Central - IN (Perry)
US	+411745-0863730	America/Indiana/Knox	Central - IN (Starke)
US	+450628-0873651	America/Menominee	Central - MI (Wisconsin border)
US	+470659-1011757	America/North_Dakota/Center	Central - ND (Oliver)
US	+465042-1012439	America/North_Dakota/New_Salem	Central - ND (Morton rural)
US	+471551-1014640	America/North_Dakota/Beulah	Central - ND (Mercer)
US	+394421-1045903	America/Denver	Mountain (most areas)
US	+433649-1161209	America/Boise	Mountain - ID (south), OR (east)
US	+332654-1120424	America/Phoenix	MST - AZ (except Navajo)
US	+340308-1181434	America/Los_Angeles	Pacific
US	+611305-1495401	America/Anchorage	Alaska (most areas)
US	+581807-1342511	America/Juneau	Alaska - Juneau area
US	+571035-1351807	America/Sitka	Alaska - Sitka area
US	+550737-1313435	America/Metlakatla	Alaska - Annette Island
US	+593249-1394338	America/Yakutat	Alaska - Yakutat
US	+643004-1652423	America/Nome	Alaska (west)
US	+515248-1763929	America/Adak	Alaska - western Aleutians
US	+211825-1575130	Pacific/Honolulu	Hawaii
UY	-345433-0561245	America/Montevideo
UZ	+3940+06648	Asia/Samarkand	Uzbekistan (west)
UZ	+4120+06918	Asia/Tashkent	Uzbekistan (east)
VA	+415408+0122711	Europe/Vatican
VC	+1309-06114	America/St_Vincent
VE	+1030-06656	America/Caracas
VG	+1827-06437	America/Tortola
VI	+1821-06456	America/St_Thomas
VN	+1045+10640	Asia/Ho_Chi_Minh
VU	-1740+16825	Pacific/Efate
WF	-1318-17610	Pacific/Wallis
WS	-1350-17144	Pacific/Apia
YE	+1245+04512	Asia/Aden
YT	-1247+04514	Indian/Mayotte
ZA	-2615+02800	Africa/Johannesburg
ZM	-1525+02817	Africa/Lusaka
ZW	-1750+03103	Africa/Harare
# tz zone descriptions (deprecated version)
#
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
#
# From Paul Eggert (2021-09-20):
# This file is intended as a backward-compatibility aid for older programs.
# New programs should use zone1970.tab.  This file is like zone1970.tab (see
# zone1970.tab's comments), but with the following additional restrictions:
#
# 1.  This file contains only ASCII characters.
# 2.  The first data column contains exactly one country code.
#
# Because of (2), each row stands for an area that is the intersection
# of a region identified by a country code and of a timezone where civil
# clocks have agreed since 1970; this is a narrower definition than
# that of zone1970.tab.
#
# Unlike zone1970.tab, a row's third column can be a Link from
# 'backward' instead of a Zone.
#
# This table is intended as an aid for users, to help them select timezones
# appropriate for their practical needs.  It is not intended to take or
# endorse any position on legal or territorial claims.
#
#
# NOTE -- This is the special version of zone.tab, which is used by libzoneinfo.
# This file can go away once libzoneinfo is deprecated.
#
# This file contains a table with the following columns:
# 1.  ISO 3166 2-character country code.  See the file `iso3166.tab'.
# 2.  Latitude and longitude of the zone's principal location
#     in ISO 6709 sign-degrees-minutes-seconds format,
#     either +-DDMM+-DDDMM or +-DDMMSS+-DDDMMSS,
#     first latitude (+ is north), then longitude (+ is east).
# 3.  Zone name used in value of TZ environment variable.
# 4.  Canonical timezone name (now deprecated by the hardlinks in the real
#     zoneinfo), or a '-' if not needed.
# 5.  Comments; present if and only if the country has multiple rows.
#
#
# Columns are separated by a single tab.
# The table is sorted first by country, then an order within the country that
# (1) makes some geographical sense, and
# (2) puts the most populous zones first, where that does not contradict (1).
#
# Lines beginning with `#' are comments.
#
#country-
#code	coordinates	TZ			comments
AD	+4230+00131	Europe/Andorra	-
AE	+2518+05518	Asia/Dubai	-
AF	+3431+06912	Asia/Kabul	-
AG	+1703-06148	America/Antigua	-
AI	+1812-06304	America/Anguilla	-
AL	+4120+01950	Europe/Tirane	-
AM	+4011+04430	Asia/Yerevan	-
AO	-0848+01314	Africa/Luanda	-
AQ	-7750+16636	Antarctica/McMurdo	-	New Zealand time - McMurdo, South Pole
AQ	-6617+11031	Antarctica/Casey	-	Casey
AQ	-6835+07758	Antarctica/Davis	-	Davis
AQ	-6640+14001	Antarctica/DumontDUrville	-	Dumont-d'Urville
AQ	-6736+06253	Antarctica/Mawson	-	Mawson
AQ	-6448-06406	Antarctica/Palmer	-	Palmer
AQ	-6734-06808	Antarctica/Rothera	-	Rothera
AQ	-690022+0393524	Antarctica/Syowa	-	Syowa
AQ	-720041+0023206	Antarctica/Troll	-	Troll
AQ	-7824+10654	Antarctica/Vostok	-	Vostok
AR	-3436-05827	America/Argentina/Buenos_Aires	America/Buenos_Aires	Buenos Aires (BA, CF)
AR	-3124-06411	America/Argentina/Cordoba	-	Argentina (most areas: CB, CC, CN, ER, FM, MN, SE, SF)
AR	-2447-06525	America/Argentina/Salta	-	Salta (SA, LP, NQ, RN)
AR	-2411-06518	America/Argentina/Jujuy	America/Jujuy	Jujuy (JY)
AR	-2649-06513	America/Argentina/Tucuman	-	Tucuman (TM)
AR	-2828-06547	America/Argentina/Catamarca	America/Catamarca	Catamarca (CT), Chubut (CH)
AR	-2926-06651	America/Argentina/La_Rioja	-	La Rioja (LR)
AR	-3132-06831	America/Argentina/San_Juan	-	San Juan (SJ)
AR	-3253-06849	America/Argentina/Mendoza	America/Mendoza	Mendoza (MZ)
AR	-3319-06621	America/Argentina/San_Luis	-	San Luis (SL)
AR	-5138-06913	America/Argentina/Rio_Gallegos	-	Santa Cruz (SC)
AR	-5448-06818	America/Argentina/Ushuaia	-	Tierra del Fuego (TF)
AS	-1416-17042	Pacific/Pago_Pago	US/Samoa
AT	+4813+01620	Europe/Vienna	-
AU	-3133+15905	Australia/Lord_Howe	Australia/LHI	Lord Howe Island
AU	-5430+15857	Antarctica/Macquarie	-	Macquarie Island
AU	-4253+14719	Australia/Hobart	-	Tasmania
AU	-3749+14458	Australia/Melbourne	Australia/Victoria	Victoria
AU	-3352+15113	Australia/Sydney	-	New South Wales (most areas)
AU	-3157+14127	Australia/Broken_Hill	-	New South Wales (Yancowinna)
AU	-2728+15302	Australia/Brisbane	-	Queensland (most areas)
AU	-2016+14900	Australia/Lindeman	-	Queensland (Whitsunday Islands)
AU	-3455+13835	Australia/Adelaide	Australia/South	South Australia
AU	-1228+13050	Australia/Darwin	Australia/North	Northern Territory
AU	-3157+11551	Australia/Perth	-	Western Australia (most areas)
AU	-3143+12852	Australia/Eucla	-	Western Australia (Eucla)
AW	+1230-06958	America/Aruba	-
AX	+6006+01957	Europe/Mariehamn	-
AZ	+4023+04951	Asia/Baku	-
BA	+4352+01825	Europe/Sarajevo	-
BB	+1306-05937	America/Barbados	-
BD	+2343+09025	Asia/Dhaka	-
BE	+5050+00420	Europe/Brussels	-
BF	+1222-00131	Africa/Ouagadougou	-
BG	+4241+02319	Europe/Sofia	-
BH	+2623+05035	Asia/Bahrain	-
BI	-0323+02922	Africa/Bujumbura	-
BJ	+0629+00237	Africa/Porto-Novo	-
BL	+1753-06251	America/St_Barthelemy	-
BM	+3217-06446	Atlantic/Bermuda	-
BN	+0456+11455	Asia/Brunei	-
BO	-1630-06809	America/La_Paz	-
BQ	+120903-0681636	America/Kralendijk	-
BR	-0351-03225	America/Noronha	Brazil/DeNoronha	Atlantic islands
BR	-0127-04829	America/Belem	-	Para (east), Amapa
BR	-0343-03830	America/Fortaleza	-	Brazil (northeast: MA, PI, CE, RN, PB)
BR	-0803-03454	America/Recife	-	Pernambuco
BR	-0712-04812	America/Araguaina	-	Tocantins
BR	-0940-03543	America/Maceio	-	Alagoas, Sergipe
BR	-1259-03831	America/Bahia	-	Bahia
BR	-2332-04637	America/Sao_Paulo	-	Brazil (southeast: GO, DF, MG, ES, RJ, SP, PR, SC, RS)
BR	-2027-05437	America/Campo_Grande	-	Mato Grosso do Sul
BR	-1535-05605	America/Cuiaba	-	Mato Grosso
BR	-0226-05452	America/Santarem	-	Para (west)
BR	-0846-06354	America/Porto_Velho	-	Rondonia
BR	+0249-06040	America/Boa_Vista	-	Roraima
BR	-0308-06001	America/Manaus	-	Amazonas (east)
BR	-0640-06952	America/Eirunepe	-	Amazonas (west)
BR	-0958-06748	America/Rio_Branco	Brazil/Acre	Acre
BS	+2505-07721	America/Nassau	-
BT	+2728+08939	Asia/Thimphu	-
BW	-2439+02555	Africa/Gaborone	-
BY	+5354+02734	Europe/Minsk	-
BZ	+1730-08812	America/Belize	-
CA	+4734-05243	America/St_Johns	-	Newfoundland, Labrador (SE)
CA	+4439-06336	America/Halifax	-	Atlantic - NS (most areas), PE
CA	+4612-05957	America/Glace_Bay	-	Atlantic - NS (Cape Breton)
CA	+4606-06447	America/Moncton	-	Atlantic - New Brunswick
CA	+5320-06025	America/Goose_Bay	-	Atlantic - Labrador (most areas)
CA	+5125-05707	America/Blanc-Sablon	-	AST - QC (Lower North Shore)
CA	+4339-07923	America/Toronto	-	Eastern - ON & QC (most areas)
CA	+6344-06828	America/Iqaluit	-	Eastern - NU (most areas)
CA	+484531-0913718	America/Atikokan	-	EST - ON (Atikokan), NU (Coral H)
CA	+4953-09709	America/Winnipeg	-	Central - ON (west), Manitoba
CA	+744144-0944945	America/Resolute	-	Central - NU (Resolute)
CA	+624900-0920459	America/Rankin_Inlet	-	Central - NU (central)
CA	+5024-10439	America/Regina	-	CST - SK (most areas)
CA	+5017-10750	America/Swift_Current	-	CST - SK (midwest)
CA	+5333-11328	America/Edmonton	-	Mountain - AB, BC(E), NT(E), SK(W)
CA	+690650-1050310	America/Cambridge_Bay	-	Mountain - NU (west)
CA	+682059-1334300	America/Inuvik	-	Mountain - NT (west)
CA	+4906-11631	America/Creston	-	MST - BC (Creston)
CA	+5546-12014	America/Dawson_Creek	-	MST - BC (Dawson Cr, Ft St John)
CA	+5848-12242	America/Fort_Nelson	-	MST - BC (Ft Nelson)
CA	+6043-13503	America/Whitehorse	-	MST - Yukon (east)
CA	+6404-13925	America/Dawson	-	MST - Yukon (west)
CA	+4916-12307	America/Vancouver	-	Pacific - BC (most areas)
CC	-1210+09655	Indian/Cocos	-
CD	-0418+01518	Africa/Kinshasa	-	Dem. Rep. of Congo (west)
CD	-1140+02728	Africa/Lubumbashi	-	Dem. Rep. of Congo (east)
CF	+0422+01835	Africa/Bangui	-
CG	-0416+01517	Africa/Brazzaville	-
CH	+4723+00832	Europe/Zurich	-
CI	+0519-00402	Africa/Abidjan	-
CK	-2114-15946	Pacific/Rarotonga	-
CL	-3327-07040	America/Santiago	-	most of Chile
CL	-4534-07204	America/Coyhaique	-	Aysen Region
CL	-5309-07055	America/Punta_Arenas	-	Magallanes Region
CL	-2709-10926	Pacific/Easter	Chile/EasterIsland	Easter Island
CM	+0403+00942	Africa/Douala	-
CN	+3114+12128	Asia/Shanghai	-	Beijing Time
CN	+4348+08735	Asia/Urumqi	-	Xinjiang Time
CO	+0436-07405	America/Bogota	-
CR	+0956-08405	America/Costa_Rica	-
CU	+2308-08222	America/Havana	-
CV	+1455-02331	Atlantic/Cape_Verde	-
CW	+1211-06900	America/Curacao	-
CX	-1025+10543	Indian/Christmas	-
CY	+3510+03322	Asia/Nicosia	-	most of Cyprus
CY	+3507+03357	Asia/Famagusta	-	Northern Cyprus
CZ	+5005+01426	Europe/Prague	-
DE	+5230+01322	Europe/Berlin	-	most of Germany
DE	+4742+00841	Europe/Busingen	-	Busingen
DJ	+1136+04309	Africa/Djibouti	-
DK	+5540+01235	Europe/Copenhagen	-
DM	+1518-06124	America/Dominica	-
DO	+1828-06954	America/Santo_Domingo	-
DZ	+3647+00303	Africa/Algiers	-
EC	-0210-07950	America/Guayaquil	-	Ecuador (mainland)
EC	-0054-08936	Pacific/Galapagos	-	Galapagos Islands
EE	+5925+02445	Europe/Tallinn	-
EG	+3003+03115	Africa/Cairo	Egypt
EH	+2709-01312	Africa/El_Aaiun	-
ER	+1520+03853	Africa/Asmara	-
ES	+4024-00341	Europe/Madrid	-	Spain (mainland)
ES	+3553-00519	Africa/Ceuta	-	Ceuta, Melilla
ES	+2806-01524	Atlantic/Canary	-	Canary Islands
ET	+0902+03842	Africa/Addis_Ababa	-
FI	+6010+02458	Europe/Helsinki	-
FJ	-1808+17825	Pacific/Fiji	-
FK	-5142-05751	Atlantic/Stanley	-
FM	+0725+15147	Pacific/Chuuk	-	Chuuk/Truk, Yap
FM	+0658+15813	Pacific/Pohnpei	-	Pohnpei/Ponape
FM	+0519+16259	Pacific/Kosrae	-	Kosrae
FO	+6201-00646	Atlantic/Faroe	-
FR	+4852+00220	Europe/Paris	-
GA	+0023+00927	Africa/Libreville	-
GB	+513030-0000731	Europe/London	GB
GD	+1203-06145	America/Grenada	-
GE	+4143+04449	Asia/Tbilisi	-
GF	+0456-05220	America/Cayenne	-
GG	+492717-0023210	Europe/Guernsey	-
GH	+0533-00013	Africa/Accra	-
GI	+3608-00521	Europe/Gibraltar	-
GL	+6411-05144	America/Nuuk	-	most of Greenland
GL	+7646-01840	America/Danmarkshavn	-	National Park (east coast)
GL	+7029-02158	America/Scoresbysund	-	Scoresbysund/Ittoqqortoormiit
GL	+7634-06847	America/Thule	-	Thule/Pituffik
GM	+1328-01639	Africa/Banjul	-
GN	+0931-01343	Africa/Conakry	-
GP	+1614-06132	America/Guadeloupe	-
GQ	+0345+00847	Africa/Malabo	-
GR	+3758+02343	Europe/Athens	-
GS	-5416-03632	Atlantic/South_Georgia	-
GT	+1438-09031	America/Guatemala	-
GU	+1328+14445	Pacific/Guam	-
GW	+1151-01535	Africa/Bissau	-
GY	+0648-05810	America/Guyana	-
HK	+2217+11409	Asia/Hong_Kong	Hongkong
HN	+1406-08713	America/Tegucigalpa	-
HR	+4548+01558	Europe/Zagreb	-
HT	+1832-07220	America/Port-au-Prince	-
HU	+4730+01905	Europe/Budapest	-
ID	-0610+10648	Asia/Jakarta	-	Java, Sumatra
ID	-0002+10920	Asia/Pontianak	-	Borneo (west, central)
ID	-0507+11924	Asia/Makassar	-	Borneo (east, south), Sulawesi/Celebes, Bali, Nusa Tengarra, Timor (west)
ID	-0232+14042	Asia/Jayapura	-	New Guinea (West Papua / Irian Jaya), Malukus/Moluccas
IE	+5320-00615	Europe/Dublin	Eire
IL	+314650+0351326	Asia/Jerusalem	Israel
IM	+5409-00428	Europe/Isle_of_Man	-
IN	+2232+08822	Asia/Kolkata	-
IO	-0720+07225	Indian/Chagos	-
IQ	+3321+04425	Asia/Baghdad	-
IR	+3540+05126	Asia/Tehran	Iran
IS	+6409-02151	Atlantic/Reykjavik	Iceland
IT	+4154+01229	Europe/Rome	-
JE	+491101-0020624	Europe/Jersey	-
JM	+175805-0764736	America/Jamaica	-
JO	+3157+03556	Asia/Amman	-
JP	+353916+1394441	Asia/Tokyo	Japan
KE	-0117+03649	Africa/Nairobi	-
KG	+4254+07436	Asia/Bishkek	-
KH	+1133+10455	Asia/Phnom_Penh	-
KI	+0125+17300	Pacific/Tarawa	-	Gilbert Islands
KI	-0247-17143	Pacific/Kanton	-	Phoenix Islands
KI	+0152-15720	Pacific/Kiritimati	-	Line Islands
KM	-1141+04316	Indian/Comoro	-
KN	+1718-06243	America/St_Kitts	-
KP	+3901+12545	Asia/Pyongyang	-
KR	+3733+12658	Asia/Seoul	ROK
KW	+2920+04759	Asia/Kuwait	-
KY	+1918-08123	America/Cayman	-
KZ	+4315+07657	Asia/Almaty	-	most of Kazakhstan
KZ	+4448+06528	Asia/Qyzylorda	-	Qyzylorda/Kyzylorda/Kzyl-Orda
KZ	+5312+06337	Asia/Qostanay	-	Qostanay/Kostanay/Kustanay
KZ	+5017+05710	Asia/Aqtobe	-	Aqtobe/Aktobe
KZ	+4431+05016	Asia/Aqtau	-	Mangghystau/Mankistau
KZ	+4707+05156	Asia/Atyrau	-	Atyrau/Atirau/Gur'yev
KZ	+5113+05121	Asia/Oral	-	West Kazakhstan
LA	+1758+10236	Asia/Vientiane	-
LB	+3353+03530	Asia/Beirut	-
LC	+1401-06100	America/St_Lucia	-
LI	+4709+00931	Europe/Vaduz	-
LK	+0656+07951	Asia/Colombo	-
LR	+0618-01047	Africa/Monrovia	-
LS	-2928+02730	Africa/Maseru	-
LT	+5441+02519	Europe/Vilnius	-
LU	+4936+00609	Europe/Luxembourg	-
LV	+5657+02406	Europe/Riga	-
LY	+3254+01311	Africa/Tripoli	Libya
MA	+3339-00735	Africa/Casablanca	-
MC	+4342+00723	Europe/Monaco	-
MD	+4700+02850	Europe/Chisinau	-
ME	+4226+01916	Europe/Podgorica	-
MF	+1804-06305	America/Marigot	-
MG	-1855+04731	Indian/Antananarivo	-
MH	+0709+17112	Pacific/Majuro	-	most of Marshall Islands
MH	+0905+16720	Pacific/Kwajalein	Kwajalein
MK	+4159+02126	Europe/Skopje	-
ML	+1239-00800	Africa/Bamako	-
MM	+1647+09610	Asia/Yangon	-
MN	+4755+10653	Asia/Ulaanbaatar	-	most of Mongolia
MN	+4801+09139	Asia/Hovd	-	Bayan-Olgiy, Govi-Altai, Hovd, Uvs, Zavkhan
MO	+221150+1133230	Asia/Macau	Asia/Macao
MP	+1512+14545	Pacific/Saipan	-
MQ	+1436-06105	America/Martinique	-
MR	+1806-01557	Africa/Nouakchott	-
MS	+1643-06213	America/Montserrat	-
MT	+3554+01431	Europe/Malta	-
MU	-2010+05730	Indian/Mauritius	-
MV	+0410+07330	Indian/Maldives	-
MW	-1547+03500	Africa/Blantyre	-
MX	+1924-09909	America/Mexico_City	-	Central Mexico
MX	+2105-08646	America/Cancun	-	Quintana Roo
MX	+2058-08937	America/Merida	-	Campeche, Yucatan
MX	+2540-10019	America/Monterrey	-	Durango; Coahuila, Nuevo Leon, Tamaulipas (most areas)
MX	+2550-09730	America/Matamoros	-	Coahuila, Nuevo Leon, Tamaulipas (US border)
MX	+2838-10605	America/Chihuahua	-	Chihuahua (most areas)
MX	+3144-10629	America/Ciudad_Juarez	-	Chihuahua (US border - west)
MX	+2934-10425	America/Ojinaga	-	Chihuahua (US border - east)
MX	+2313-10625	America/Mazatlan	-	Baja California Sur, Nayarit (most areas), Sinaloa
MX	+2048-10515	America/Bahia_Banderas	-	Bahia de Banderas
MX	+2904-11058	America/Hermosillo	-	Sonora
MX	+3232-11701	America/Tijuana	-	Baja California
MY	+0310+10142	Asia/Kuala_Lumpur	-	Malaysia (peninsula)
MY	+0133+11020	Asia/Kuching	-	Sabah, Sarawak
MZ	-2558+03235	Africa/Maputo	-
NA	-2234+01706	Africa/Windhoek	-
NC	-2216+16627	Pacific/Noumea	-
NE	+1331+00207	Africa/Niamey	-
NF	-2903+16758	Pacific/Norfolk	-
NG	+0627+00324	Africa/Lagos	-
NI	+1209-08617	America/Managua	-
NL	+5222+00454	Europe/Amsterdam	-
NO	+5955+01045	Europe/Oslo	-
NP	+2743+08519	Asia/Kathmandu	-
NR	-0031+16655	Pacific/Nauru	-
NU	-1901-16955	Pacific/Niue	-
NZ	-3652+17446	Pacific/Auckland	-	most of New Zealand
NZ	-4357-17633	Pacific/Chatham	-	Chatham Islands
OM	+2336+05835	Asia/Muscat	-
PA	+0858-07932	America/Panama	-
PE	-1203-07703	America/Lima	-
PF	-1732-14934	Pacific/Tahiti	-	Society Islands
PF	-0900-13930	Pacific/Marquesas	-	Marquesas Islands
PF	-2308-13457	Pacific/Gambier	-	Gambier Islands
PG	-0930+14710	Pacific/Port_Moresby	-	most of Papua New Guinea
PG	-0613+15534	Pacific/Bougainville	-	Bougainville
PH	+143512+1205804	Asia/Manila	-
PK	+2452+06703	Asia/Karachi	-
PL	+5215+02100	Europe/Warsaw	Poland
PM	+4703-05620	America/Miquelon	-
PN	-2504-13005	Pacific/Pitcairn	-
PR	+182806-0660622	America/Puerto_Rico	-
PS	+3130+03428	Asia/Gaza	-	Gaza Strip
PS	+313200+0350542	Asia/Hebron	-	West Bank
PT	+3843-00908	Europe/Lisbon	-	Portugal (mainland)
PT	+3238-01654	Atlantic/Madeira	-	Madeira Islands
PT	+3744-02540	Atlantic/Azores	-	Azores
PW	+0720+13429	Pacific/Palau	-
PY	-2516-05740	America/Asuncion	-
QA	+2517+05132	Asia/Qatar	-
RE	-2052+05528	Indian/Reunion	-
RO	+4426+02606	Europe/Bucharest	-
RS	+4450+02030	Europe/Belgrade	-
RU	+5443+02030	Europe/Kaliningrad	-	MSK-01 - Kaliningrad
RU	+554521+0373704	Europe/Moscow	-	MSK+00 - Moscow area
RU	+5836+04939	Europe/Kirov	-	MSK+00 - Kirov
RU	+4844+04425	Europe/Volgograd	-	MSK+00 - Volgograd
RU	+4621+04803	Europe/Astrakhan	-	MSK+01 - Astrakhan
RU	+5134+04602	Europe/Saratov	-	MSK+01 - Saratov
RU	+5420+04824	Europe/Ulyanovsk	-	MSK+01 - Ulyanovsk
RU	+5312+05009	Europe/Samara	-	MSK+01 - Samara, Udmurtia
RU	+5651+06036	Asia/Yekaterinburg	-	MSK+02 - Urals
RU	+5500+07324	Asia/Omsk	-	MSK+03 - Omsk
RU	+5502+08255	Asia/Novosibirsk	-	MSK+04 - Novosibirsk
RU	+5322+08345	Asia/Barnaul	-	MSK+04 - Altai
RU	+5630+08458	Asia/Tomsk	-	MSK+04 - Tomsk
RU	+5345+08707	Asia/Novokuznetsk	-	MSK+04 - Kemerovo
RU	+5601+09250	Asia/Krasnoyarsk	-	MSK+04 - Krasnoyarsk area
RU	+5216+10420	Asia/Irkutsk	-	MSK+05 - Irkutsk, Buryatia
RU	+5203+11328	Asia/Chita	-	MSK+06 - Zabaykalsky
RU	+6200+12940	Asia/Yakutsk	-	MSK+06 - Lena River
RU	+623923+1353314	Asia/Khandyga	-	MSK+06 - Tomponsky, Ust-Maysky
RU	+4310+13156	Asia/Vladivostok	-	MSK+07 - Amur River
RU	+643337+1431336	Asia/Ust-Nera	-	MSK+07 - Oymyakonsky
RU	+5934+15048	Asia/Magadan	-	MSK+08 - Magadan
RU	+4658+14242	Asia/Sakhalin	-	MSK+08 - Sakhalin Island
RU	+6728+15343	Asia/Srednekolymsk	-	MSK+08 - Sakha (E), N Kuril Is
RU	+5301+15839	Asia/Kamchatka	-	MSK+09 - Kamchatka
RU	+6445+17729	Asia/Anadyr	-	MSK+09 - Bering Sea
RW	-0157+03004	Africa/Kigali	-
SA	+2438+04643	Asia/Riyadh	-
SB	-0932+16012	Pacific/Guadalcanal	-
SC	-0440+05528	Indian/Mahe	-
SD	+1536+03232	Africa/Khartoum	-
SE	+5920+01803	Europe/Stockholm	-
SG	+0117+10351	Asia/Singapore	Singapore
SH	-1555-00542	Atlantic/St_Helena	-
SI	+4603+01431	Europe/Ljubljana	-
SJ	+7800+01600	Arctic/Longyearbyen	-
SK	+4809+01707	Europe/Bratislava	-
SL	+0830-01315	Africa/Freetown	-
SM	+4355+01228	Europe/San_Marino	-
SN	+1440-01726	Africa/Dakar	-
SO	+0204+04522	Africa/Mogadishu	-
SR	+0550-05510	America/Paramaribo	-
SS	+0451+03137	Africa/Juba	-
ST	+0020+00644	Africa/Sao_Tome	-
SV	+1342-08912	America/El_Salvador	-
SX	+180305-0630250	America/Lower_Princes	-
SY	+3330+03618	Asia/Damascus	-
SZ	-2618+03106	Africa/Mbabane	-
TC	+2128-07108	America/Grand_Turk	-
TD	+1207+01503	Africa/Ndjamena	-
TF	-492110+0701303	Indian/Kerguelen	-
TG	+0608+00113	Africa/Lome	-
TH	+1345+10031	Asia/Bangkok	-
TJ	+3835+06848	Asia/Dushanbe	-
TK	-0922-17114	Pacific/Fakaofo	-
TL	-0833+12535	Asia/Dili	-
TM	+3757+05823	Asia/Ashgabat	-
TN	+3648+01011	Africa/Tunis	-
TO	-210800-1751200	Pacific/Tongatapu	-
TR	+4101+02858	Europe/Istanbul	Turkey
TT	+1039-06131	America/Port_of_Spain	-
TV	-0831+17913	Pacific/Funafuti	-
TW	+2503+12130	Asia/Taipei	-
TZ	-0648+03917	Africa/Dar_es_Salaam	-
UA	+5026+03031	Europe/Kyiv	-	most of Ukraine
# The obsolescent zone.tab format cannot represent Europe/Simferopol well.
# Upstream zoneinfo have put it in RU section but listed it as UA
# However, libzoneinfo relies on this file being sorted and so we place it in
# the UA section.
UA	+4457+03406	Europe/Simferopol	-	Crimea
UG	+0019+03225	Africa/Kampala	-
UM	+2813-17722	Pacific/Midway	-	Midway Islands
UM	+1917+16637	Pacific/Wake	-	Wake Island
US	+404251-0740023	America/New_York	-	Eastern (most areas)
US	+421953-0830245	America/Detroit	-	Eastern - MI (most areas)
US	+381515-0854534	America/Kentucky/Louisville	-	Eastern - KY (Louisville area)
US	+364947-0845057	America/Kentucky/Monticello	-	Eastern - KY (Wayne)
US	+394606-0860929	America/Indiana/Indianapolis	-	Eastern - IN (most areas)
US	+384038-0873143	America/Indiana/Vincennes	-	Eastern - IN (Da, Du, K, Mn)
US	+410305-0863611	America/Indiana/Winamac	-	Eastern - IN (Pulaski)
US	+382232-0862041	America/Indiana/Marengo	-	Eastern - IN (Crawford)
US	+382931-0871643	America/Indiana/Petersburg	-	Eastern - IN (Pike)
US	+384452-0850402	America/Indiana/Vevay	-	Eastern - IN (Switzerland)
US	+415100-0873900	America/Chicago	-	Central (most areas)
US	+375711-0864541	America/Indiana/Tell_City	-	Central - IN (Perry)
US	+411745-0863730	America/Indiana/Knox	-	Central - IN (Starke)
US	+450628-0873651	America/Menominee	-	Central - MI (Wisconsin border)
US	+470659-1011757	America/North_Dakota/Center	-	Central - ND (Oliver)
US	+465042-1012439	America/North_Dakota/New_Salem	-	Central - ND (Morton rural)
US	+471551-1014640	America/North_Dakota/Beulah	-	Central - ND (Mercer)
US	+394421-1045903	America/Denver	-	Mountain (most areas)
US	+433649-1161209	America/Boise	-	Mountain - ID (south), OR (east)
US	+332654-1120424	America/Phoenix	-	MST - AZ (except Navajo)
US	+340308-1181434	America/Los_Angeles	-	Pacific
US	+611305-1495401	America/Anchorage	-	Alaska (most areas)
US	+581807-1342511	America/Juneau	-	Alaska - Juneau area
US	+571035-1351807	America/Sitka	-	Alaska - Sitka area
US	+550737-1313435	America/Metlakatla	-	Alaska - Annette Island
US	+593249-1394338	America/Yakutat	-	Alaska - Yakutat
US	+643004-1652423	America/Nome	-	Alaska (west)
US	+515248-1763929	America/Adak	US/Aleutian	Alaska - western Aleutians
US	+211825-1575130	Pacific/Honolulu	US/Hawaii	Hawaii
UY	-345433-0561245	America/Montevideo	-
UZ	+3940+06648	Asia/Samarkand	-	Uzbekistan (west)
UZ	+4120+06918	Asia/Tashkent	-	Uzbekistan (east)
VA	+415408+0122711	Europe/Vatican	-
VC	+1309-06114	America/St_Vincent	-
VE	+1030-06656	America/Caracas	-
VG	+1827-06437	America/Tortola	-
VI	+1821-06456	America/St_Thomas	-
VN	+1045+10640	Asia/Ho_Chi_Minh	-
VU	-1740+16825	Pacific/Efate	-
WF	-1318-17610	Pacific/Wallis	-
WS	-1350-17144	Pacific/Apia	-
YE	+1245+04512	Asia/Aden	-
YT	-1247+04514	Indian/Mayotte	-
ZA	-2615+02800	Africa/Johannesburg	-
ZM	-1525+02817	Africa/Lusaka	-
ZW	-1750+03103	Africa/Harare	-
#!/bin/ksh
#
# This file and its contents are supplied under the terms of the
# Common Development and Distribution License ("CDDL"), version 1.0.
# You may only use this file in accordance with the terms of version
# 1.0 of the CDDL.
#
# A full copy of the text of the CDDL should have accompanied this
# source. A copy of the CDDL is also available via the Internet at
# http://www.illumos.org/license/CDDL.

# Copyright 2020 OmniOS Community Edition (OmniOSce) Association.

f=zone_sun.tab
proto=$ROOT/usr/share/lib/zoneinfo

if [[ ! -f "$f" ]]; then
	echo "Run from inside usr/src/data/zoneinfo"
	exit 1
fi

if [[ ! -d "$proto" ]]; then
	echo "No zoneinfo in $proto - run 'dmake install'"
	exit 1
fi

# First check that all of the referenced zone files exist in the proto
# area.

nawk -F'\t' '
	/^#/ { next }
	{
		print $3
		if ($4 != "-")
			print $4
	}
' $f | while read zone; do
	if [ ! -f $proto/$zone ]; then
		echo "Missing: $zone"
	fi
done

# Check that lines have between 3 and 5 fields

nawk -F'\t' '
	/^#/ { next }
	NF < 3 || NF > 5 { print NF, $0 }
' $f | while read line; do
	echo "Fields: $line"
done

# Check that field 5 does not point to a zone file. This could indicate a
# field in the wrong position.

nawk -F'\t' '
	/^#/ { next }
	NF > 4 { print $5 }
' $f | while read zone; do
	if [ -f "$proto/$zone" ]; then
		echo "Check: $zone"
	fi
done

# Check that the file is properly sorted

of=`mktemp`
nf=`mktemp`
nawk '/^#/ { next } { print $1 }' $f > $of
sort < $of > $nf
cmp -s $of $nf || echo "Bad sorting"
rm -f $of $nf