DST law changes in Chile and Mexico (state of Quintana Roo).
Historical changes for Iceland.
Rule ChileAQ 2010 only - Apr Sun>=1 3:00u 0 -
Rule ChileAQ 2011 only - May Sun>=2 3:00u 0 -
Rule ChileAQ 2011 only - Aug Sun>=16 4:00u 1:00 S
-Rule ChileAQ 2012 max - Apr Sun>=23 3:00u 0 -
-Rule ChileAQ 2012 max - Sep Sun>=2 4:00u 1:00 S
+Rule ChileAQ 2012 2015 - Apr Sun>=23 3:00u 0 -
+Rule ChileAQ 2012 2014 - Sep Sun>=2 4:00u 1:00 S
# Argentina - year-round bases
# Belgrano II, Confin Coast, -770227-0343737, since 1972-02-05
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Antarctica/Palmer 0 - zzz 1965
- -4:00 ArgAQ AR%sT 1969 Oct 5
+ -4:00 ArgAQ AR%sT 1969 Oct 5
-3:00 ArgAQ AR%sT 1982 May
- -4:00 ChileAQ CL%sT
+ -4:00 ChileAQ CL%sT 2015 Apr 26 3:00u
+ -3:00 - CLT
#
#
# McMurdo Station, Ross Island, since 1955-12
4:00 Azer AZ%sT
# Bahrain
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Asia/Bahrain 3:22:20 - LMT 1920 # Manamah
- 4:00 - GST 1972 Jun
- 3:00 - AST
+# See Asia/Qatar.
# Bangladesh
# From Alexander Krivenyshev (2009-05-13):
###############################################################################
# Kuwait
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Asia/Kuwait 3:11:56 - LMT 1950
- 3:00 - AST
+# See Asia/Riyadh.
# Laos
# See Asia/Bangkok.
5:45 - NPT # Nepal Time
# Oman
-
-# Milne says 3:54:24 was the meridian of the Muscat Tidal Observatory.
-
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Asia/Muscat 3:54:24 - LMT 1920
- 4:00 - GST
+# See Asia/Dubai.
# Pakistan
Zone Asia/Qatar 3:26:08 - LMT 1920 # Al Dawhah / Doha
4:00 - GST 1972 Jun
3:00 - AST
+Link Asia/Qatar Asia/Bahrain
# Saudi Arabia
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Riyadh 3:06:52 - LMT 1947 Mar 14
3:00 - AST
+Link Asia/Riyadh Asia/Aden # Yemen
+Link Asia/Riyadh Asia/Kuwait
# Singapore
# taken from Mok Ly Yng (2003-10-30)
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Dubai 3:41:12 - LMT 1920
4:00 - GST
+Link Asia/Dubai Asia/Muscat # Oman
# Uzbekistan
# Byalokoz 1919 says Uzbekistan was 4:27:53.
7:00 - ICT
# Yemen
-
-# Milne says 2:59:54 was the meridian of the saluting battery at Aden,
-# and that Yemen was at 1:55:56, the meridian of the Hagia Sophia.
-
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Asia/Aden 2:59:54 - LMT 1950
- 3:00 - AST
+# See Asia/Riyadh.
# and their old names. Many names changed in late 1993.
# Link TARGET LINK-NAME
-Link Africa/Asmara Africa/Asmera
+Link Africa/Nairobi Africa/Asmera
Link Africa/Abidjan Africa/Timbuktu
Link America/Argentina/Catamarca America/Argentina/ComodRivadavia
Link America/Adak America/Atka
2:35:32 - AMT 1890 # Asmara Mean Time
2:35:20 - ADMT 1936 May 5 # Adis Dera MT
3:00 - EAT
+Link Africa/Asmara Africa/Asmera
# Mali (southern)
Zone Africa/Bamako -0:32:00 - LMT 1912
12:00 NZ NZ%sT
Link Antarctica/McMurdo Antarctica/South_Pole
+# Yemen
+# Milne says 2:59:54 was the meridian of the saluting battery at Aden,
+# and that Yemen was at 1:55:56, the meridian of the Hagia Sophia.
+Zone Asia/Aden 2:59:54 - LMT 1950
+ 3:00 - AST
+
+# Bahrain
+Zone Asia/Bahrain 3:22:20 - LMT 1920 # Manamah
+ 4:00 - GST 1972 Jun
+ 3:00 - AST
+
# India
#
# From Paul Eggert (2014-09-06):
5:00 - KAST 1980 May
8:00 PRC C%sT
+# Kuwait
+Zone Asia/Kuwait 3:11:56 - LMT 1950
+ 3:00 - AST
+
+
+# Oman
+# Milne says 3:54:24 was the meridian of the Muscat Tidal Observatory.
+Zone Asia/Muscat 3:54:24 - LMT 1920
+ 4:00 - GST
+
# India
# From Paul Eggert (2014-08-11), after a heads-up from Stephen Colebourne:
# According to a Portuguese decree (1911-05-26)
#
# AT4 of 1883 - The Statutory Time et cetera Act 1883 -
# LMT Location - 54.1508N -4.4814E - Tynwald Hill ( Manx parliament )
-Zone Europe/Isle_of_Man -0:17:55 - LMT 1883 March 30 0:00s
+Zone Europe/Isle_of_Man -0:17:55 - LMT 1883 Mar 30 0:00s
0:00 GB-Eire %s 1968 Oct 27
1:00 - BST 1971 Oct 31 2:00u
0:00 GB-Eire %s 1996
# might be a reference to the Julian calendar as opposed to Gregorian, or it
# might mean something else (???).
#
-# From Paul Eggert (2006-03-22):
-# The Iceland Almanak, Shanks & Pottenger, and Whitman disagree on many points.
-# We go with the Almanak, except for one claim from Shanks & Pottenger, namely
-# that Reykavik was 21W57 from 1837 to 1908, local mean time before that.
+# From Paul Eggert (2014-11-22):
+# The information below is taken from the 1988 Almanak; see
+# http://www.almanak.hi.is/klukkan.html
#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule Iceland 1917 1918 - Feb 19 23:00 1:00 S
+Rule Iceland 1917 1919 - Feb 19 23:00 1:00 S
Rule Iceland 1917 only - Oct 21 1:00 0 -
-Rule Iceland 1918 only - Nov 16 1:00 0 -
+Rule Iceland 1918 1919 - Nov 16 1:00 0 -
+Rule Iceland 1921 only - Mar 19 23:00 1:00 S
+Rule Iceland 1921 only - Jun 23 1:00 0 -
Rule Iceland 1939 only - Apr 29 23:00 1:00 S
-Rule Iceland 1939 only - Nov 29 2:00 0 -
+Rule Iceland 1939 only - Oct 29 2:00 0 -
Rule Iceland 1940 only - Feb 25 2:00 1:00 S
-Rule Iceland 1940 only - Nov 3 2:00 0 -
-Rule Iceland 1941 only - Mar 2 1:00s 1:00 S
-Rule Iceland 1941 only - Nov 2 1:00s 0 -
-Rule Iceland 1942 only - Mar 8 1:00s 1:00 S
-Rule Iceland 1942 only - Oct 25 1:00s 0 -
+Rule Iceland 1940 1941 - Nov Sun>=2 1:00s 0 -
+Rule Iceland 1941 1942 - Mar Sun>=2 1:00s 1:00 S
# 1943-1946 - first Sunday in March until first Sunday in winter
Rule Iceland 1943 1946 - Mar Sun>=1 1:00s 1:00 S
-Rule Iceland 1943 1948 - Oct Sun>=22 1:00s 0 -
+Rule Iceland 1942 1948 - Oct Sun>=22 1:00s 0 -
# 1947-1967 - first Sunday in April until first Sunday in winter
Rule Iceland 1947 1967 - Apr Sun>=1 1:00s 1:00 S
-# 1949 Oct transition delayed by 1 week
+# 1949 and 1967 Oct transitions delayed by 1 week
Rule Iceland 1949 only - Oct 30 1:00s 0 -
Rule Iceland 1950 1966 - Oct Sun>=22 1:00s 0 -
Rule Iceland 1967 only - Oct 29 1:00s 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Atlantic/Reykjavik -1:27:24 - LMT 1837
- -1:27:48 - RMT 1908 # Reykjavik Mean Time?
+Zone Atlantic/Reykjavik -1:28 - LMT 1908
-1:00 Iceland IS%sT 1968 Apr 7 1:00s
0:00 - GMT
Leap 2005 Dec 31 23:59:60 + S
Leap 2008 Dec 31 23:59:60 + S
Leap 2012 Jun 30 23:59:60 + S
+Leap 2015 Jun 30 23:59:60 + S
+
+# Updated through IERS Bulletin C49
+# File expires on: 28 December 2015
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 1945 only - Sep lastSun 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
# Mexico
-# From Paul Eggert (2001-03-05):
+# 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.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/
+# 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.)
# 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.
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Mexico 1939 only - Feb 5 0:00 1:00 D
Rule Mexico 1939 only - Jun 25 0:00 0 S
Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
-6:00 - CST 1981 Dec 23
-5:00 Mexico E%sT 1998 Aug 2 2:00
- -6:00 Mexico C%sT
+ -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 0:01:32
-6:00 - CST 1981 Dec 23
# DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC)
# http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf
+# From Juan Correa (2015-01-28):
+# ... today the Ministry of Energy announced that Chile will drop DST, will keep
+# "summer time" (UTC -3 / UTC -5) all year round....
+# http://www.minenergia.cl/ministerio/noticias/generales/ministerio-de-energia-anuncia.html
+
# NOTE: ChileAQ rules for Antarctic bases are stored separately in the
# 'antarctica' file.
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 S
-Rule Chile 2012 max - Apr Sun>=23 3:00u 0 -
-Rule Chile 2012 max - Sep Sun>=2 4:00u 1:00 S
+Rule Chile 2012 2015 - Apr Sun>=23 3:00u 0 -
+Rule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 S
# IATA SSIM anomalies: (1992-02) says 1992-03-14;
# (1996-09) says 1998-03-08. Ignore these.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-4:00 - CLT 1919 Jul 1 # Chile Time
-4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
-5:00 Chile CL%sT 1947 May 22 # Chile Time
- -4:00 Chile CL%sT
+ -4:00 Chile CL%sT 2015 Apr 26 3:00u
+ -3:00 - CLT
Zone Pacific/Easter -7:17:44 - LMT 1890
-7:17:28 - EMT 1932 Sep # Easter Mean Time
- -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter Time
- -6:00 Chile EAS%sT
+ -7:00 Chile EAS%sT 1982 Mar 13 3:00u # Easter Time
+ -6:00 Chile EAS%sT 2015 Apr 26 3:00u
+ -5:00 - EAST
#
# Salas y Gómez Island is uninhabited.
# Other Chilean locations, including Juan Fernández Is, Desventuradas Is,
MV +0410+07330 Indian/Maldives
MW -1547+03500 Africa/Blantyre
MX +1924-09909 America/Mexico_City Central Time - most locations
-MX +2105-08646 America/Cancun Central Time - Quintana Roo
+MX +2105-08646 America/Cancun Eastern Standard Time - Quintana Roo
MX +2058-08937 America/Merida Central Time - Campeche, Yucatan
MX +2540-10019 America/Monterrey Mexican Central Time - Coahuila, Durango, Nuevo Leon, Tamaulipas away from US border
MX +2550-09730 America/Matamoros US Central Time - Coahuila, Durango, Nuevo Leon, Tamaulipas near US border
MU -2010+05730 Indian/Mauritius
MV +0410+07330 Indian/Maldives
MX +1924-09909 America/Mexico_City Central Time - most locations
-MX +2105-08646 America/Cancun Central Time - Quintana Roo
+MX +2105-08646 America/Cancun Eastern Standard Time - Quintana Roo
MX +2058-08937 America/Merida Central Time - Campeche, Yucatán
MX +2540-10019 America/Monterrey Mexican Central Time - Coahuila, Durango, Nuevo León, Tamaulipas away from US border
MX +2550-09730 America/Matamoros US Central Time - Coahuila, Durango, Nuevo León, Tamaulipas near US border
CHUT 36000
CKT -36000
CLST -10800 D
-CLT -14400
+CLT -10800
COT -18000
CST -18000
CST -21600
DAVT 25200
DDUT 36000
EASST -18000 D
-EAST -21600
+EAST -18000
EAT 10800
ECT -18000
EDT -14400 D
# - CDT: Cuba Central Daylight Time (America)
# - CDT: Canada Central Daylight Time (America)
CDT -18000 D # Central Daylight Time
- # (America/Cancun)
# (America/Chicago)
# (America/Menominee)
# (America/Merida)
# (America/Rainy_River)
# (America/Rankin_Inlet)
# (America/Winnipeg)
-CLST -10800 D # Chile Summer Time
+CLST -10800 D # Chile Summer Time (obsolete)
# (America/Santiago)
# (Antarctica/Palmer)
-CLT -14400 # Chile Time
+CLT America/Santiago # Chile Time
# (America/Santiago)
# (Antarctica/Palmer)
COT -18000 # Columbia Time (not in zic)
# - CST: China Standard Time (Asia)
# - CST: Cuba Central Standard Time (America)
CST -21600 # Central Standard Time (America)
- # (America/Cancun)
# (America/Chicago)
# (America/Menominee)
# (America/Merida)
# Other timezones:
# - EST: Eastern Standard Time (Australia)
EST -18000 # Eastern Standard Time (America)
+ # (America/Cancun)
# (America/Cayman)
# (America/Coral_Harbour)
# (America/Detroit)
AWST 28800 # Australian Western Standard Time
# (Antarctica/Casey)
# (Australia/Perth)
-CLST -10800 D # Chile Summer Time
+CLST -10800 D # Chile Summer Time (obsolete)
# (America/Santiago)
# (Antarctica/Palmer)
-CLT -14400 # Chile Time
+CLT America/Santiago # Chile Time
# (America/Santiago)
# (Antarctica/Palmer)
DAVT Antarctica/Davis # Davis Time (Antarctica)
# - CDT: Cuba Central Daylight Time (America)
# - CDT: Canada Central Daylight Time (America)
CDT -18000 D # Central Daylight Time
- # (America/Cancun)
# (America/Chicago)
# (America/Menominee)
# (America/Merida)
# (America/Rainy_River)
# (America/Rankin_Inlet)
# (America/Winnipeg)
-CLST -10800 D # Chile Summer Time
+CLST -10800 D # Chile Summer Time (obsolete)
# (America/Santiago)
# (Antarctica/Palmer)
-CLT -14400 # Chile Time
+CLT America/Santiago # Chile Time
# (America/Santiago)
# (Antarctica/Palmer)
# CONFLICT! CST is not unique
# - CST: China Standard Time (Asia)
# - CST: Cuba Central Standard Time (America)
CST -21600 # Central Standard Time (America)
- # (America/Cancun)
# (America/Chicago)
# (America/Menominee)
# (America/Merida)
# Other timezones:
# - EST: Eastern Standard Time (Australia)
EST -18000 # Eastern Standard Time (America)
+ # (America/Cancun)
# (America/Cayman)
# (America/Coral_Harbour)
# (America/Detroit)