# the file CONTRIBUTING in the tz distribution.
-# From Paul Eggert (2014-10-31):
+# From Paul Eggert (2017-02-20):
#
# 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.
#
-# Gwillim Law writes that a good source
-# for recent time zone data is the International Air Transport
+# 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,
# A reliable and entertaining source about time zones is
# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
#
+# 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 +0:00 through +3:00, respectively,
-# but Mark R V Murray reports that
-# 'SAST' is the official abbreviation for +2:00 in the country of South Africa,
-# 'CAT' is commonly used for +2:00 in countries north of South Africa, and
-# 'WAT' is probably the best name for +1:00, as the common phrase for
+# 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".
-# He has heard of "Western Sahara Time" for +0:00 but can find no reference.
-#
-# To make things confusing, 'WAT' seems to have been used for -1:00 long ago;
-# I'd guess that this was because people needed _some_ name for -1:00,
-# and at the time, far west Africa was the only major land area in -1:00.
-# This usage is now obsolete, as the last use of -1:00 on the African
-# mainland seems to have been 1976 in Western Sahara.
-#
-# To summarize, the following abbreviations seem to have some currency:
-# -1:00 WAT West Africa Time (no longer used)
-# 0:00 GMT Greenwich Mean Time
-# 2:00 CAT Central Africa Time
-# 2:00 SAST South Africa Standard Time
-# and Murray suggests the following abbreviation:
-# 1:00 WAT West Africa Time
-# I realize that this leads to 'WAT' being used for both -1:00 and 1:00
-# for times before 1976, but this is the best I can think of
-# until we get more information.
+#
+# 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; corrections are welcome!
-# 2:00 WAST West Africa Summer Time
-# 2:30 BEAT British East Africa Time (no longer used)
-# 2:45 BEAUT British East Africa Unified Time (no longer used)
-# 3:00 CAST Central Africa Summer Time (no longer used)
-# 3:00 SAST South Africa Summer Time (no longer used)
-# 3:00 EAT East Africa Time
+# +02 WAST West Africa Summer Time
+# +03 CAST Central Africa Summer Time (no longer used)
+# +03 SAST South Africa Summer Time (no longer used)
+# +03 EAT East Africa Time
+# 'EAT' also seems to have caught on; the others are rare but are paired
+# with better-attested non-DST abbreviations.
# Algeria
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
# Cape Verde / Cabo Verde
#
-# Shanks gives 1907 for the transition to CVT.
+# Shanks gives 1907 for the transition to +02.
# Perhaps the 1911-05-26 Portuguese decree
-# http://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
+# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
# merely made it official?
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Atlantic/Cape_Verde -1:34:04 - LMT 1907 # Praia
- -2:00 - CVT 1942 Sep
- -2:00 1:00 CVST 1945 Oct 15
- -2:00 - CVT 1975 Nov 25 2:00
- -1:00 - CVT
+ -2:00 - -02 1942 Sep
+ -2:00 1:00 -01 1945 Oct 15
+ -2:00 - -02 1975 Nov 25 2:00
+ -1:00 - -01
# Central African Republic
# See Africa/Lagos.
Rule Ghana 1920 1942 - Dec 31 0:00 0 GMT
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Africa/Accra -0:00:52 - LMT 1918
- 0:00 Ghana %s
+ 0:00 Ghana GMT/+0020
# Guinea
# See Africa/Abidjan.
#
# Shanks gives 1911-05-26 for the transition to WAT,
# evidently confusing the date of the Portuguese decree
-# http://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
+# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
# with the date that it took effect, namely 1912-01-01.
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Africa/Bissau -1:02:20 - LMT 1912 Jan 1
- -1:00 - WAT 1975
+ -1:00 - -01 1975
0:00 - GMT
# Kenya
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Africa/Nairobi 2:27:16 - LMT 1928 Jul
3:00 - EAT 1930
- 2:30 - BEAT 1940
- 2:45 - BEAUT 1960
+ 2:30 - +0230 1940
+ 2:45 - +0245 1960
3:00 - EAT
Link Africa/Nairobi Africa/Addis_Ababa # Ethiopia
Link Africa/Nairobi Africa/Asmara # Eritrea
# See Africa/Johannesburg.
# Liberia
-# From Paul Eggert (2006-03-22):
-# In 1972 Liberia was the last country to switch
-# from a UTC offset that was not a multiple of 15 or 20 minutes.
-# Howse reports that it was in honor of their president's birthday.
-# Shank & Pottenger report the date as May 1, whereas Howse reports Jan;
-# go with Shanks & Pottenger.
-# For Liberia before 1972, Shanks & Pottenger report -0:44, whereas Howse and
-# Whitman each report -0:44:30; go with the more precise figure.
+#
+# 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 UTC 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 GMTOFF RULES FORMAT [UNTIL]
Zone Africa/Monrovia -0:43:08 - LMT 1882
-0:43:08 - MMT 1919 Mar # Monrovia Mean Time
- -0:44:30 - LRT 1972 May # Liberia Time
+ -0:44:30 - MMT 1972 Jan 7 # approximately MMT
0:00 - GMT
###############################################################################
Rule Mauritius 2009 only - Mar lastSun 2:00 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis
- 4:00 Mauritius MU%sT # Mauritius Time
+ 4:00 Mauritius +04/+05
# Agalega Is, Rodriguez
# no information; probably like Indian/Mauritius
# since most of it was then controlled by Morocco.
Zone Africa/El_Aaiun -0:52:48 - LMT 1934 Jan # El Aaiún
- -1:00 - WAT 1976 Apr 14
+ -1:00 - -01 1976 Apr 14
0:00 Morocco WE%sT
# Mozambique
#
# Shanks gives 1903-03-01 for the transition to CAT.
# Perhaps the 1911-05-26 Portuguese decree
-# http://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
+# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
# merely made it official?
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
# the country are close to 40 minutes earlier in sunrise than the rest
# of the country.
#
-# From Paul Eggert (2007-03-31):
-# Apparently the Caprivi Strip informally observes Botswana time, but
-# we have no details. In the meantime people there can use Africa/Gaborone.
+# 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.
+# http://www.namibian.com.na/51480/read/Time-change-divides-lawmakers
# RULE NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Namibia 1994 max - Sep Sun>=1 2:00 1:00 S
Rule Namibia 1995 max - Apr Sun>=1 2:00 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Africa/Windhoek 1:08:24 - LMT 1892 Feb 8
- 1:30 - SWAT 1903 Mar # SW Africa Time
+ 1:30 - +0130 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
# Réunion
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Indian/Reunion 3:41:52 - LMT 1911 Jun # Saint-Denis
- 4:00 - RET # Réunion Time
+ 4:00 - +04
#
# Crozet Islands also observes Réunion time; see the 'antarctica' file.
#
# Seychelles
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Indian/Mahe 3:41:48 - LMT 1906 Jun # Victoria
- 4:00 - SCT # Seychelles Time
+ 4:00 - +04
# From Paul Eggert (2001-05-30):
# Aldabra, Farquhar, and Desroches, originally dependencies of the
# Seychelles, were transferred to the British Indian Ocean Territory
# 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 have always used Santiago time; use TZ='America/Santiago'.
+# 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
# the file CONTRIBUTING in the tz distribution.
-# From Paul Eggert (2015-08-08):
+# From Paul Eggert (2017-01-13):
#
# 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.
#
-# Gwillim Law writes that a good source
-# for recent time zone data is the International Air Transport
+# 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,
# A reliable and entertaining source about time zones is
# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
#
-# I invented the abbreviations marked '*' in the following table;
-# the rest are from earlier versions of this file, or from other sources.
-# Corrections are welcome!
+# The following alphabetic abbreviations appear in these tables:
# std dst
# LMT Local Mean Time
# 2:00 EET EEST Eastern European Time
# 2:00 IST IDT Israel
-# 3:00 AST ADT Arabia*
-# 3:30 IRST IRDT Iran*
-# 4:00 GST Gulf*
# 5:30 IST India
-# 7:00 ICT Indochina, most times and locations*
# 7:00 WIB west Indonesia (Waktu Indonesia Barat)
# 8:00 WITA central Indonesia (Waktu Indonesia Tengah)
# 8:00 CST China
-# 8:00 IDT Indochina, 1943-45, 1947-55, 1960-75 (some locations)*
-# 8:00 JWST Western Standard Time (Japan, 1896/1937)*
-# 8:30 KST KDT Korea when at +0830*
-# 9:00 JCST Central Standard Time (Japan, 1896/1937)
+# 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
# 9:30 ACST Australian Central Standard Time
+# Otherwise, these tables typically use numeric abbreviations like +03
+# and +0330 for integer hour and minute UTC 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.
# 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). The names for time zones are guesses.
+# Worldwide Edition).
###############################################################################
# Afghanistan
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Kabul 4:36:48 - LMT 1890
- 4:00 - AFT 1945
- 4:30 - AFT
+ 4:00 - +04 1945
+ 4:30 - +0430
# Armenia
# From Paul Eggert (2006-03-22):
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Dhaka 6:01:40 - LMT 1890
5:53:20 - HMT 1941 Oct # Howrah Mean Time?
- 6:30 - BURT 1942 May 15 # Burma Time
- 5:30 - IST 1942 Sep
- 6:30 - BURT 1951 Sep 30
- 6:00 - DACT 1971 Mar 26 # Dacca Time
- 6:00 - BDT 2009
- 6:00 Dhaka BD%sT
+ 6:30 - +0630 1942 May 15
+ 5:30 - +0530 1942 Sep
+ 6:30 - +0630 1951 Sep 30
+ 6:00 - +06 2009
+ 6:00 Dhaka +06/+07
# Bhutan
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Thimphu 5:58:36 - LMT 1947 Aug 15 # or Thimbu
- 5:30 - IST 1987 Oct
- 6:00 - BTT # Bhutan Time
+ 5:30 - +0530 1987 Oct
+ 6:00 - +06
# British Indian Ocean Territory
# Whitman and the 1995 CIA time zone map say 5:00, but the
# then contained the Chagos Archipelago).
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Indian/Chagos 4:49:40 - LMT 1907
- 5:00 - IOT 1996 # BIOT Time
- 6:00 - IOT
+ 5:00 - +05 1996
+ 6:00 - +06
# Brunei
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Brunei 7:39:40 - LMT 1926 Mar # Bandar Seri Begawan
- 7:30 - BNT 1933
- 8:00 - BNT
+ 7:30 - +0730 1933
+ 8:00 - +08
# Burma / Myanmar
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Yangon 6:24:40 - LMT 1880 # or Rangoon
6:24:40 - RMT 1920 # Rangoon Mean Time?
- 6:30 - BURT 1942 May # Burma Time
- 9:00 - JST 1945 May 3
- 6:30 - MMT # Myanmar Time
+ 6:30 - +0630 1942 May
+ 9:00 - +09 1945 May 3
+ 6:30 - +0630
# Cambodia
# See Asia/Bangkok.
# (could be true), for the moment I am assuming that those two
# counties are mistakes in the astro.com data.
-# From Paul Eggert (2014-06-30):
+# From Paul Eggert (2017-01-05):
# Alois Treindl kindly sent me translations of the following two sources:
#
# (1)
# mainly observed in coastal areas), the five zones were:
#
# Changbai Time ("Long-white Time", Long-white = Heilongjiang area) UT +08:30
-# Asia/Harbin (currently a link to Asia/Shanghai)
+# 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
-# Asia/Shanghai
+# Now part of Asia/Shanghai.
# most of China
-# This currently represents most other zones as well,
-# as apparently these regions have been the same since 1970.
# Milne gives 8:05:43.2 for Xujiahui Observatory time; round to nearest.
# Guo says Shanghai switched to UT +08 "from the end of the 19th century".
#
-# Long-shu Time (probably due to Long and Shu being two names of the area) UT +07
-# Asia/Chongqing (currently a link to Asia/Shanghai)
+# 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; west Qinghai; and the Guangdong
+# 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
-# Asia/Urumqi
-# This currently represents Kunlun Time as well,
-# as apparently the two regions have been the same since 1970.
+# 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;
# Fukang, Kuitun, Kumukuli, Miquan, Qitai, and Turfan.
#
# Kunlun Time UT +05:30
-# Asia/Kashgar (currently a link to Asia/Urumqi)
+# 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,
# 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 - XJT
+ 6:00 - +06
# Hong Kong (Xianggang)
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
# Taipei or Taibei or T'ai-pei
Zone Asia/Taipei 8:06:00 - LMT 1896 Jan 1
- 8:00 - JWST 1937 Oct 1
+ 8:00 - CST 1937 Oct 1
9:00 - JST 1945 Sep 21 1:00
8:00 Taiwan C%sT
# Macau (Macao, Aomen)
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule Macau 1961 1962 - Mar Sun>=16 3:30 1:00 S
-Rule Macau 1961 1964 - Nov Sun>=1 3:30 0 -
-Rule Macau 1963 only - Mar Sun>=16 0:00 1:00 S
-Rule Macau 1964 only - Mar Sun>=16 3:30 1:00 S
-Rule Macau 1965 only - Mar Sun>=16 0:00 1:00 S
-Rule Macau 1965 only - Oct 31 0:00 0 -
-Rule Macau 1966 1971 - Apr Sun>=16 3:30 1:00 S
-Rule Macau 1966 1971 - Oct Sun>=16 3:30 0 -
-Rule Macau 1972 1974 - Apr Sun>=15 0:00 1:00 S
-Rule Macau 1972 1973 - Oct Sun>=15 0:00 0 -
-Rule Macau 1974 1977 - Oct Sun>=15 3:30 0 -
-Rule Macau 1975 1977 - Apr Sun>=15 3:30 1:00 S
-Rule Macau 1978 1980 - Apr Sun>=15 0:00 1:00 S
-Rule Macau 1978 1980 - Oct Sun>=15 0:00 0 -
+Rule Macau 1961 1962 - Mar Sun>=16 3:30 1:00 D
+Rule Macau 1961 1964 - Nov Sun>=1 3:30 0 S
+Rule Macau 1963 only - Mar Sun>=16 0:00 1:00 D
+Rule Macau 1964 only - Mar Sun>=16 3:30 1:00 D
+Rule Macau 1965 only - Mar Sun>=16 0:00 1:00 D
+Rule Macau 1965 only - Oct 31 0:00 0 S
+Rule Macau 1966 1971 - Apr Sun>=16 3:30 1:00 D
+Rule Macau 1966 1971 - Oct Sun>=16 3:30 0 S
+Rule Macau 1972 1974 - Apr Sun>=15 0:00 1:00 D
+Rule Macau 1972 1973 - Oct Sun>=15 0:00 0 S
+Rule Macau 1974 1977 - Oct Sun>=15 3:30 0 S
+Rule Macau 1975 1977 - Apr Sun>=15 3:30 1:00 D
+Rule Macau 1978 1980 - Apr Sun>=15 0:00 1:00 D
+Rule Macau 1978 1980 - Oct Sun>=15 0:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Macau 7:34:20 - LMT 1912 Jan 1
- 8:00 Macau MO%sT 1999 Dec 20 # return to China
- 8:00 PRC C%sT
+ 8:00 Macau C%sT
###############################################################################
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Dili 8:22:20 - LMT 1912 Jan 1
- 8:00 - TLT 1942 Feb 21 23:00 # E Timor Time
- 9:00 - JST 1945 Sep 23
- 9:00 - TLT 1976 May 3
- 8:00 - WITA 2000 Sep 17 0:00
- 9:00 - TLT
+ 8:00 - +08 1942 Feb 21 23:00
+ 9:00 - +09 1976 May 3
+ 8:00 - +08 2000 Sep 17 0:00
+ 9:00 - +09
# India
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Kolkata 5:53:28 - LMT 1880 # Kolkata
5:53:20 - HMT 1941 Oct # Howrah Mean Time?
- 6:30 - BURT 1942 May 15 # Burma Time
+ 6:30 - +0630 1942 May 15
5:30 - IST 1942 Sep
- 5:30 1:00 IST 1945 Oct 15
+ 5:30 1:00 +0630 1945 Oct 15
5:30 - IST
# The following are like Asia/Kolkata:
# Andaman Is
# 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 23:47:12 # Batavia
- 7:20 - JAVT 1932 Nov # Java Time
- 7:30 - WIB 1942 Mar 23
- 9:00 - JST 1945 Sep 23
- 7:30 - WIB 1948 May
- 8:00 - WIB 1950 May
- 7:30 - WIB 1964
+ 7:20 - +0720 1932 Nov
+ 7:30 - +0730 1942 Mar 23
+ 9:00 - +09 1945 Sep 23
+ 7:30 - +0730 1948 May
+ 8:00 - +08 1950 May
+ 7:30 - +0730 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 - WIB 1942 Jan 29
- 9:00 - JST 1945 Sep 23
- 7:30 - WIB 1948 May
- 8:00 - WIB 1950 May
- 7:30 - WIB 1964
+ 7:30 - +0730 1942 Jan 29
+ 9:00 - +09 1945 Sep 23
+ 7:30 - +0730 1948 May
+ 8:00 - +08 1950 May
+ 7:30 - +0730 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 - WITA 1942 Feb 9
- 9:00 - JST 1945 Sep 23
+ 8:00 - +08 1942 Feb 9
+ 9:00 - +09 1945 Sep 23
8:00 - WITA
# Maluku Islands, West Papua, Papua
Zone Asia/Jayapura 9:22:48 - LMT 1932 Nov
- 9:00 - WIT 1944 Sep 1
- 9:30 - ACST 1964
+ 9:00 - +09 1944 Sep 1
+ 9:30 - +0930 1964
9:00 - WIT
# Iran
# 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....
-# I have also changed the abbreviations to what is considered correct
-# here in Iran, IRST for regular time and IRDT for daylight saving time.
#
# From Roozbeh Pournader (2005-04-05):
# The text of the Iranian law, in effect since 1925, clearly mentions
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Tehran 3:25:44 - LMT 1916
3:25:44 - TMT 1946 # Tehran Mean Time
- 3:30 - IRST 1977 Nov
- 4:00 Iran IR%sT 1979
- 3:30 Iran IR%sT
+ 3:30 - +0330 1977 Nov
+ 4:00 Iran +04/+05 1979
+ 3:30 Iran +0330/+0430
# Iraq
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Baghdad 2:57:40 - LMT 1890
2:57:36 - BMT 1918 # Baghdad Mean Time?
- 3:00 - AST 1982 May
- 3:00 Iraq A%sT
+ 3:00 - +03 1982 May
+ 3:00 Iraq +03/+04
###############################################################################
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Tokyo 9:18:59 - LMT 1887 Dec 31 15:00u
- 9:00 - JST 1896 Jan 1
- 9:00 - JCST 1937 Oct 1
9:00 Japan J%sT
# Since 1938, all Japanese possessions have been like Asia/Tokyo.
# 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 Paul Eggert (2016-11-07):
+# 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 Paul Eggert (2016-12-06):
# The tables below reflect Golosunov's remarks, with exceptions as noted.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
6:00 - +06
# The following zone is like Asia/Qyzylorda except for being one
# hour earlier from 1991-09-29 to 1992-03-29. The 1991/2 rules for
-# Qostenay are unclear partly because of the 1997 Turgai
+# Qostanay are unclear partly because of the 1997 Turgai
# reorganization, so this zone is commented out for now.
#Zone Asia/Qostanay 4:14:20 - LMT 1924 May 2
# 4:00 - +04 1930 Jun 21
# Atyraū (KZ-ATY) 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
- 4:00 - +04 1930 Jun 21
+ 3:00 - +03 1930 Jun 21
5:00 - +05 1981 Oct 1
6:00 - +06 1982 Apr 1
5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s
# 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
- 4:00 - +04 1930 Jun 21
+ 3:00 - +03 1930 Jun 21
5:00 - +05 1981 Apr 1
5:00 1:00 +06 1981 Oct 1
6:00 - +06 1982 Apr 1
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Seoul 8:27:52 - LMT 1908 Apr 1
8:30 - KST 1912 Jan 1
- 9:00 - JCST 1937 Oct 1
9:00 - JST 1945 Sep 8
9:00 - KST 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 - JCST 1937 Oct 1
9:00 - JST 1945 Aug 24
9:00 - KST 2015 Aug 15 00:00
8:30 - KST
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Kuala_Lumpur 6:46:46 - LMT 1901 Jan 1
6:55:25 - SMT 1905 Jun 1 # Singapore M.T.
- 7:00 - MALT 1933 Jan 1 # Malaya Time
- 7:00 0:20 MALST 1936 Jan 1
- 7:20 - MALT 1941 Sep 1
- 7:30 - MALT 1942 Feb 16
- 9:00 - JST 1945 Sep 12
- 7:30 - MALT 1982 Jan 1
- 8:00 - MYT # Malaysia Time
+ 7:00 - +07 1933 Jan 1
+ 7:00 0:20 +0720 1936 Jan 1
+ 7:20 - +0720 1941 Sep 1
+ 7:30 - +0730 1942 Feb 16
+ 9:00 - +09 1945 Sep 12
+ 7:30 - +0730 1982 Jan 1
+ 8:00 - +08
# 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 GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Kuching 7:21:20 - LMT 1926 Mar
- 7:30 - BORT 1933 # Borneo Time
- 8:00 NBorneo BOR%sT 1942 Feb 16
- 9:00 - JST 1945 Sep 12
- 8:00 - BORT 1982 Jan 1
- 8:00 - MYT
+ 7:30 - +0730 1933
+ 8:00 NBorneo +08/+0820 1942 Feb 16
+ 9:00 - +09 1945 Sep 12
+ 8:00 - +08
# Maldives
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Indian/Maldives 4:54:00 - LMT 1880 # Male
4:54:00 - MMT 1960 # Male Mean Time
- 5:00 - MVT # Maldives Time
+ 5:00 - +05
# Mongolia
# 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 S
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 S
Rule Mongol 2001 2006 - Sep lastSat 2:00 0 -
Rule Mongol 2002 2006 - Mar lastSat 2:00 1:00 S
-Rule Mongol 2015 max - Mar lastSat 2:00 1:00 S
-Rule Mongol 2015 max - Sep lastSat 0:00 0 -
+Rule Mongol 2015 2016 - Mar lastSat 2:00 1:00 S
+Rule Mongol 2015 2016 - Sep lastSat 0:00 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
# Hovd, a.k.a. Chovd, Dund-Us, Dzhargalant, Khovd, Jirgalanta
Zone Asia/Hovd 6:06:36 - LMT 1905 Aug
- 6:00 - HOVT 1978 # Hovd Time
- 7:00 Mongol HOV%sT
+ 6:00 - +06 1978
+ 7:00 Mongol +07/+08
# Ulaanbaatar, a.k.a. Ulan Bataar, Ulan Bator, Urga
Zone Asia/Ulaanbaatar 7:07:32 - LMT 1905 Aug
- 7:00 - ULAT 1978 # Ulaanbaatar Time
- 8:00 Mongol ULA%sT
+ 7:00 - +07 1978
+ 8:00 Mongol +08/+09
# Choibalsan, a.k.a. Bajan Tümen, Bajan Tumen, Chojbalsan,
# Choybalsan, Sanbejse, Tchoibalsan
Zone Asia/Choibalsan 7:38:00 - LMT 1905 Aug
- 7:00 - ULAT 1978
- 8:00 - ULAT 1983 Apr
- 9:00 Mongol CHO%sT 2008 Mar 31 # Choibalsan Time
- 8:00 Mongol CHO%sT
+ 7:00 - +07 1978
+ 8:00 - +08 1983 Apr
+ 9:00 Mongol +09/+10 2008 Mar 31
+ 8:00 Mongol +08/+09
# Nepal
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Kathmandu 5:41:16 - LMT 1920
- 5:30 - IST 1986
- 5:45 - NPT # Nepal Time
+ 5:30 - +0530 1986
+ 5:45 - +0545
# Oman
# See Asia/Dubai.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Karachi 4:28:12 - LMT 1907
- 5:30 - IST 1942 Sep
- 5:30 1:00 IST 1945 Oct 15
- 5:30 - IST 1951 Sep 30
- 5:00 - KART 1971 Mar 26 # Karachi Time
+ 5:30 - +0530 1942 Sep
+ 5:30 1:00 +0630 1945 Oct 15
+ 5:30 - +0530 1951 Sep 30
+ 5:00 - +05 1971 Mar 26
5:00 Pakistan PK%sT # Pakistan Time
# Palestine
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Manila -15:56:00 - LMT 1844 Dec 31
8:04:00 - LMT 1899 May 11
- 8:00 Phil PH%sT 1942 May
- 9:00 - JST 1944 Nov
- 8:00 Phil PH%sT
+ 8:00 Phil +08/+09 1942 May
+ 9:00 - +09 1944 Nov
+ 8:00 Phil +08/+09
# Qatar
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Qatar 3:26:08 - LMT 1920 # Al Dawhah / Doha
- 4:00 - GST 1972 Jun
- 3:00 - AST
+ 4:00 - +04 1972 Jun
+ 3:00 - +03
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
+ 3:00 - +03
Link Asia/Riyadh Asia/Aden # Yemen
Link Asia/Riyadh Asia/Kuwait
# Zone NAME GMTOFF 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 - MALT 1933 Jan 1 # Malaya Time
- 7:00 0:20 MALST 1936 Jan 1
- 7:20 - MALT 1941 Sep 1
- 7:30 - MALT 1942 Feb 16
- 9:00 - JST 1945 Sep 12
- 7:30 - MALT 1965 Aug 9 # independence
- 7:30 - SGT 1982 Jan 1 # Singapore Time
- 8:00 - SGT
+ 7:00 - +07 1933 Jan 1
+ 7:00 0:20 +0720 1936 Jan 1
+ 7:20 - +0720 1941 Sep 1
+ 7:30 - +0730 1942 Feb 16
+ 9:00 - +09 1945 Sep 12
+ 7:30 - +0730 1982 Jan 1
+ 8:00 - +08
# Spratly Is
# no information
Zone Asia/Colombo 5:19:24 - LMT 1880
5:19:32 - MMT 1906 # Moratuwa Mean Time
5:30 - +0530 1942 Jan 5
- 5:30 0:30 +0530/+06 1942 Sep
- 5:30 1:00 +0530/+0630 1945 Oct 16 2:00
+ 5:30 0:30 +06 1942 Sep
+ 5:30 1:00 +0630 1945 Oct 16 2:00
5:30 - +0530 1996 May 25 0:00
6:30 - +0630 1996 Oct 26 0:30
6:00 - +06 2006 Apr 15 0:30
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Bangkok 6:42:04 - LMT 1880
6:42:04 - BMT 1920 Apr # Bangkok Mean Time
- 7:00 - ICT
+ 7:00 - +07
Link Asia/Bangkok Asia/Phnom_Penh # Cambodia
Link Asia/Bangkok Asia/Vientiane # Laos
# United Arab Emirates
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Dubai 3:41:12 - LMT 1920
- 4:00 - GST
+ 4:00 - +04
Link Asia/Dubai Asia/Muscat # Oman
# Uzbekistan
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Ho_Chi_Minh 7:06:40 - LMT 1906 Jul 1
- 7:06:30 - PLMT 1911 May 1
- 7:00 - ICT 1942 Dec 31 23:00
- 8:00 - IDT 1945 Mar 14 23:00
- 9:00 - JST 1945 Sep 2
- 7:00 - ICT 1947 Apr 1
- 8:00 - IDT 1955 Jul 1
- 7:00 - ICT 1959 Dec 31 23:00
- 8:00 - IDT 1975 Jun 13
- 7:00 - ICT
+ 7:06:30 - PLMT 1911 May 1 # Phù Liễn MT
+ 7:00 - +07 1942 Dec 31 23:00
+ 8:00 - +08 1945 Mar 14 23:00
+ 9:00 - +09 1945 Sep 2
+ 7:00 - +07 1947 Apr 1
+ 8:00 - +08 1955 Jul 1
+ 7:00 - +07 1959 Dec 31 23:00
+ 8:00 - +08 1975 Jun 13
+ 7:00 - +07
# Yemen
# See Asia/Riyadh.
8:00 Aus AW%sT 1943 Jul
8:00 AW AW%sT
Zone Australia/Eucla 8:35:28 - LMT 1895 Dec
- 8:45 Aus ACW%sT 1943 Jul
- 8:45 AW ACW%sT
+ 8:45 Aus +0845/+0945 1943 Jul
+ 8:45 AW +0845/+0945
# Queensland
#
Rule LH 2008 max - Oct Sun>=1 2:00 0:30 D
Zone Australia/Lord_Howe 10:36:20 - LMT 1895 Feb
10:00 - AEST 1981 Mar
- 10:30 LH LH%sT
+ 10:30 LH +1030/+1130 1985 Jul
+ 10:30 LH +1030/+11
# Australian miscellany
#
0 - -00 1948 Mar 25
10:00 Aus AE%sT 1967
10:00 AT AE%sT 2010 Apr 4 3:00
- 11:00 - MIST # Macquarie I Standard Time
+ 11:00 - +11
# Christmas
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Indian/Christmas 7:02:52 - LMT 1895 Feb
- 7:00 - CXT # Christmas Island Time
+ 7:00 - +07
# Cocos (Keeling) Is
# These islands were ruled by the Ross family from about 1830 to 1978.
# We don't know when standard time was introduced; for now, we guess 1900.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Indian/Cocos 6:27:40 - LMT 1900
- 6:30 - CCT # Cocos Islands Time
+ 6:30 - +0630
# Fiji
Rule Fiji 2015 max - Jan Sun>=15 3:00 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Fiji 11:55:44 - LMT 1915 Oct 26 # Suva
- 12:00 Fiji FJ%sT # Fiji Time
+ 12:00 Fiji +12/+13
# French Polynesia
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Gambier -8:59:48 - LMT 1912 Oct # Rikitea
- -9:00 - GAMT # Gambier Time
+ -9:00 - -09
Zone Pacific/Marquesas -9:18:00 - LMT 1912 Oct
- -9:30 - MART # Marquesas Time
+ -9:30 - -0930
Zone Pacific/Tahiti -9:58:16 - LMT 1912 Oct # Papeete
- -10:00 - TAHT # Tahiti Time
+ -10:00 - -10
# Clipperton (near North America) is administered from French Polynesia;
# it is uninhabited.
# Kiribati
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Tarawa 11:32:04 - LMT 1901 # Bairiki
- 12:00 - GILT # Gilbert Is Time
+ 12:00 - +12
Zone Pacific/Enderbury -11:24:20 - LMT 1901
- -12:00 - PHOT 1979 Oct # Phoenix Is Time
- -11:00 - PHOT 1995
- 13:00 - PHOT
+ -12:00 - -12 1979 Oct
+ -11:00 - -11 1995
+ 13:00 - +13
Zone Pacific/Kiritimati -10:29:20 - LMT 1901
- -10:40 - LINT 1979 Oct # Line Is Time
- -10:00 - LINT 1995
- 14:00 - LINT
+ -10:40 - -1040 1979 Oct
+ -10:00 - -10 1995
+ 14:00 - +14
# N Mariana Is
# See Pacific/Guam.
# Marshall Is
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Majuro 11:24:48 - LMT 1901
- 11:00 - MHT 1969 Oct # Marshall Islands Time
- 12:00 - MHT
+ 11:00 - +11 1969 Oct
+ 12:00 - +12
Zone Pacific/Kwajalein 11:09:20 - LMT 1901
- 11:00 - MHT 1969 Oct
- -12:00 - KWAT 1993 Aug 20 # Kwajalein Time
- 12:00 - MHT
+ 11:00 - +11 1969 Oct
+ -12:00 - -12 1993 Aug 20
+ 12:00 - +12
# Micronesia
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Chuuk 10:07:08 - LMT 1901
- 10:00 - CHUT # Chuuk Time
+ 10:00 - +10
Zone Pacific/Pohnpei 10:32:52 - LMT 1901 # Kolonia
- 11:00 - PONT # Pohnpei Time
+ 11:00 - +11
Zone Pacific/Kosrae 10:51:56 - LMT 1901
- 11:00 - KOST 1969 Oct # Kosrae Time
- 12:00 - KOST 1999
- 11:00 - KOST
+ 11:00 - +11 1969 Oct
+ 12:00 - +12 1999
+ 11:00 - +11
# Nauru
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Nauru 11:07:40 - LMT 1921 Jan 15 # Uaobe
- 11:30 - NRT 1942 Mar 15 # Nauru Time
- 9:00 - JST 1944 Aug 15
- 11:30 - NRT 1979 May
- 12:00 - NRT
+ 11:30 - +1130 1942 Mar 15
+ 9:00 - +09 1944 Aug 15
+ 11:30 - +1130 1979 May
+ 12:00 - +12
# New Caledonia
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule NC 1997 only - Mar 2 2:00s 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Noumea 11:05:48 - LMT 1912 Jan 13 # Nouméa
- 11:00 NC NC%sT
+ 11:00 NC +11/+12
###############################################################################
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 - CHAST 1946 Jan 1
- 12:45 Chatham CHA%sT
+ 12:15 - +1215 1946 Jan 1
+ 12:45 Chatham +1245/+1345
Link Pacific/Auckland Antarctica/McMurdo
Rule Cook 1979 1990 - Oct lastSun 0:00 0:30 HS
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Rarotonga -10:39:04 - LMT 1901 # Avarua
- -10:30 - CKT 1978 Nov 12 # Cook Is Time
- -10:00 Cook CK%sT
+ -10:30 - -1030 1978 Nov 12
+ -10:00 Cook -10/-0930
###############################################################################
# Niue
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Niue -11:19:40 - LMT 1901 # Alofi
- -11:20 - NUT 1951 # Niue Time
- -11:30 - NUT 1978 Oct 1
- -11:00 - NUT
+ -11:20 - -1120 1951
+ -11:30 - -1130 1978 Oct 1
+ -11:00 - -11
# Norfolk
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Norfolk 11:11:52 - LMT 1901 # Kingston
- 11:12 - NMT 1951 # Norfolk Mean Time
- 11:30 - NFT 1974 Oct 27 02:00 # Norfolk T.
- 11:30 1:00 NFST 1975 Mar 2 02:00
- 11:30 - NFT 2015 Oct 4 02:00
- 11:00 - NFT
+ 11:12 - +1112 1951
+ 11:30 - +1130 1974 Oct 27 02:00
+ 11:30 1:00 +1230 1975 Mar 2 02:00
+ 11:30 - +1130 2015 Oct 4 02:00
+ 11:00 - +11
# Palau (Belau)
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Palau 8:57:56 - LMT 1901 # Koror
- 9:00 - PWT # Palau Time
+ 9:00 - +09
# Papua New Guinea
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Port_Moresby 9:48:40 - LMT 1880
9:48:32 - PMMT 1895 # Port Moresby Mean Time
- 10:00 - PGT # Papua New Guinea Time
+ 10:00 - +10
#
# From Paul Eggert (2014-10-13):
# Base the Bougainville entry on the Arawa-Kieta region, which appears to have
# 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";
-# abbreviate this as BST. See:
+# 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 - PGT 1942 Jul
- 9:00 - JST 1945 Aug 21
- 10:00 - PGT 2014 Dec 28 2:00
- 11:00 - BST
+ 10:00 - +10 1942 Jul
+ 9:00 - +09 1945 Aug 21
+ 10:00 - +10 2014 Dec 28 2:00
+ 11:00 - +11
# Pitcairn
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Pitcairn -8:40:20 - LMT 1901 # Adamstown
- -8:30 - PNT 1998 Apr 27 0:00
- -8:00 - PST # Pitcairn Standard Time
+ -8:30 - -0830 1998 Apr 27 0:00
+ -8:00 - -08
# American Samoa
Zone Pacific/Pago_Pago 12:37:12 - LMT 1879 Jul 5
-11:22:48 - LMT 1911
- -11:00 - NST 1967 Apr # N=Nome
- -11:00 - BST 1983 Nov 30 # B=Bering
-11:00 - SST # S=Samoa
Link Pacific/Pago_Pago Pacific/Midway # in US minor outlying islands
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Apia 12:33:04 - LMT 1879 Jul 5
-11:26:56 - LMT 1911
- -11:30 - WSST 1950
- -11:00 WS S%sT 2011 Dec 29 24:00 # S=Samoa
- 13:00 WS WS%sT
+ -11:30 - -1130 1950
+ -11:00 WS -11/-10 2011 Dec 29 24:00
+ 13:00 WS +13/+14
# Solomon Is
# excludes Bougainville, for which see Papua New Guinea
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Guadalcanal 10:39:48 - LMT 1912 Oct # Honiara
- 11:00 - SBT # Solomon Is Time
+ 11:00 - +11
-# Tokelau Is
+# Tokelau
#
# From Gwillim Law (2011-12-29)
# A correspondent informed me that Tokelau, like Samoa, will be skipping
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Fakaofo -11:24:56 - LMT 1901
- -11:00 - TKT 2011 Dec 30 # Tokelau Time
- 13:00 - TKT
+ -11:00 - -11 2011 Dec 30
+ 13:00 - +13
# Tonga
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
# Tuvalu
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Funafuti 11:56:52 - LMT 1901
- 12:00 - TVT # Tuvalu Time
+ 12:00 - +12
# US minor outlying islands
# Johnston
#
-# From Paul Eggert (2014-03-11):
+# 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.
+# 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
# (2005), Herbert C. Bach writes,
# 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".
-#
-# See 'northamerica' for Pacific/Johnston.
# Kingman
# uninhabited
# Wake
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Wake 11:06:28 - LMT 1901
- 12:00 - WAKT # Wake Time
+ 12:00 - +12
# Vanuatu
Rule Vanuatu 1992 only - Oct Sun>=23 0:00 1:00 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Efate 11:13:16 - LMT 1912 Jan 13 # Vila
- 11:00 Vanuatu VU%sT # Vanuatu Time
+ 11:00 Vanuatu +11/+12
# Wallis and Futuna
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Wallis 12:15:20 - LMT 1901
- 12:00 - WFT # Wallis & Futuna Time
+ 12:00 - +12
###############################################################################
# the file CONTRIBUTING in the tz distribution.
-# From Paul Eggert (2014-10-31):
+# 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.
#
-# Gwillim Law writes that a good source
-# for recent time zone data is the International Air Transport
+# 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,
# A reliable and entertaining source about time zones is
# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
#
-# I invented the abbreviations marked '*' in the following table;
-# the rest are from earlier versions of this file, or from other sources.
+# The following abbreviations are from other sources.
# Corrections are welcome!
# std dst
# LMT Local Mean Time
# 8:00 AWST AWDT Western Australia
-# 8:45 ACWST ACWDT Central Western Australia*
-# 9:00 JST Japan
# 9:30 ACST ACDT Central Australia
# 10:00 AEST AEDT Eastern Australia
+# 10:00 GST Guam through 2000
# 10:00 ChST Chamorro
-# 10:30 LHST LHDT Lord Howe*
-# 11:00 BST Bougainville*
# 11:30 NZMT NZST New Zealand through 1945
# 12:00 NZST NZDT New Zealand 1946-present
-# 12:15 CHAST Chatham through 1945*
-# 12:45 CHAST CHADT Chatham 1946-present*
-# 13:00 WSST WSDT (western) Samoa 2011-present*
-# -11:30 WSST Western Samoa through 1950*
# -11:00 SST Samoa
# -10:00 HST Hawaii
-# - 8:00 PST Pitcairn*
#
# See the 'northamerica' file for Hawaii.
# See the 'southamerica' file for Easter I and the Galápagos Is.
Link Pacific/Chatham NZ-CHAT
Link America/Denver Navajo
Link Asia/Shanghai PRC
+Link Pacific/Honolulu Pacific/Johnston
Link Pacific/Pohnpei Pacific/Ponape
Link Pacific/Pago_Pago Pacific/Samoa
Link Pacific/Chuuk Pacific/Truk
# Mali (southern)
Zone Africa/Bamako -0:32:00 - LMT 1912
0:00 - GMT 1934 Feb 26
- -1:00 - WAT 1960 Jun 20
+ -1:00 - -01 1960 Jun 20
0:00 - GMT
# Central African Republic
# Gambia
Zone Africa/Banjul -1:06:36 - LMT 1912
-1:06:36 - BMT 1935 # Banjul Mean Time
- -1:00 - WAT 1964
+ -1:00 - -01 1964
0:00 - GMT
# Malawi
# Guinea
Zone Africa/Conakry -0:54:52 - LMT 1912
0:00 - GMT 1934 Feb 26
- -1:00 - WAT 1960
+ -1:00 - -01 1960
0:00 - GMT
# Senegal
Zone Africa/Dakar -1:09:44 - LMT 1912
- -1:00 - WAT 1941 Jun
+ -1:00 - -01 1941 Jun
0:00 - GMT
# Tanzania
Zone Africa/Dar_es_Salaam 2:37:08 - LMT 1931
3:00 - EAT 1948
- 2:45 - BEAUT 1961
+ 2:45 - +0245 1961
3:00 - EAT
# Djibouti
# The International Hydrographic Bulletin, 1932-33, p 63 says that
# Sierra Leone would advance its clocks by 20 minutes on 1933-10-01.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule SL 1935 1942 - Jun 1 0:00 0:40 SLST
-Rule SL 1935 1942 - Oct 1 0:00 0 WAT
-Rule SL 1957 1962 - Jun 1 0:00 1:00 SLST
+Rule SL 1935 1942 - Jun 1 0:00 0:40 -0020
+Rule SL 1935 1942 - Oct 1 0:00 0 -01
+Rule SL 1957 1962 - Jun 1 0:00 1:00 +01
Rule SL 1957 1962 - Sep 1 0:00 0 GMT
Zone Africa/Freetown -0:53:00 - LMT 1882
-0:53:00 - FMT 1913 Jun # Freetown Mean Time
-1:00 SL %s 1957
- 0:00 SL %s
+ 0:00 SL GMT/+01
# Botswana
# From Paul Eggert (2013-02-21):
# Uganda
Zone Africa/Kampala 2:09:40 - LMT 1928 Jul
3:00 - EAT 1930
- 2:30 - BEAT 1948
- 2:45 - BEAUT 1957
+ 2:30 - +0230 1948
+ 2:45 - +0245 1957
3:00 - EAT
# Rwanda
#
# Shanks gives 1911-05-26 for the transition to WAT,
# evidently confusing the date of the Portuguese decree
-# http://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
+# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
# with the date that it took effect, namely 1912-01-01.
#
Zone Africa/Luanda 0:52:56 - LMT 1892
- 0:52:04 - AOT 1912 Jan 1 # Angola Time
+ 0:52:04 - +005204 1912 Jan 1
1:00 - WAT
# Democratic Republic of the Congo (east)
# Somalia
Zone Africa/Mogadishu 3:01:28 - LMT 1893 Nov
3:00 - EAT 1931
- 2:30 - BEAT 1957
+ 2:30 - +0230 1957
3:00 - EAT
# Niger
Zone Africa/Niamey 0:08:28 - LMT 1912
- -1:00 - WAT 1934 Feb 26
+ -1:00 - -01 1934 Feb 26
0:00 - GMT 1960
1:00 - WAT
# Mauritania
Zone Africa/Nouakchott -1:03:48 - LMT 1912
0:00 - GMT 1934 Feb 26
- -1:00 - WAT 1960 Nov 28
+ -1:00 - -01 1960 Nov 28
0:00 - GMT
# Burkina Faso
# The name "Comodoro Rivadavia" exceeds the 14-byte POSIX limit.
Zone America/Argentina/ComodRivadavia -4:30:00 - LMT 1894 Oct 31
-4:16:48 - CMT 1920 May
- -4:00 - ART 1930 Dec
- -4:00 Arg AR%sT 1969 Oct 5
- -3:00 Arg AR%sT 1991 Mar 3
- -4:00 - WART 1991 Oct 20
- -3:00 Arg AR%sT 1999 Oct 3
- -4:00 Arg AR%sT 2000 Mar 3
- -3:00 - ART 2004 Jun 1
- -4:00 - WART 2004 Jun 20
- -3:00 - ART
+ -4:00 - -04 1930 Dec
+ -4:00 Arg -04/-03 1969 Oct 5
+ -3:00 Arg -03/-02 1991 Mar 3
+ -4:00 - -04 1991 Oct 20
+ -3:00 Arg -03/-02 1999 Oct 3
+ -4:00 Arg -04/-03 2000 Mar 3
+ -3:00 - -03 2004 Jun 1
+ -4:00 - -04 2004 Jun 20
+ -3:00 - -03
# Aruba
Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
- -4:30 - ANT 1965 # Netherlands Antilles Time
+ -4:30 - -0430 1965
-4:00 - AST
# Cayman Is
# Formosa (FM), La Pampa (LP), Chubut (CH)
Zone America/Rosario -4:02:40 - LMT 1894 Nov
-4:16:44 - CMT 1920 May
- -4:00 - ART 1930 Dec
- -4:00 Arg AR%sT 1969 Oct 5
- -3:00 Arg AR%sT 1991 Jul
- -3:00 - ART 1999 Oct 3 0:00
- -4:00 Arg AR%sT 2000 Mar 3 0:00
- -3:00 - ART
+ -4:00 - -04 1930 Dec
+ -4:00 Arg -04/-03 1969 Oct 5
+ -3:00 Arg -03/-02 1991 Jul
+ -3:00 - -03 1999 Oct 3 0:00
+ -4:00 Arg -04/-03 2000 Mar 3 0:00
+ -3:00 - -03
# St Kitts-Nevis
Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre
# 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
+ 3:00 - +03
# Bahrain
Zone Asia/Bahrain 3:22:20 - LMT 1920 # Manamah
- 4:00 - GST 1972 Jun
- 3:00 - AST
+ 4:00 - +04 1972 Jun
+ 3:00 - +03
# India
#
# counties Deqing, Enping, Kaiping, Luoding, Taishan, Xinxing,
# Yangchun, Yangjiang, Yu'nan, and Yunfu.
Zone Asia/Chongqing 7:06:20 - LMT 1928 # or Chungking
- 7:00 - LONT 1980 May # Long-shu Time
+ 7:00 - +07 1980 May
8:00 PRC C%sT
Link Asia/Chongqing Asia/Chungking
# October 1954, with exact date and time unspecified.
Zone Asia/Hanoi 7:03:24 - LMT 1906 Jul 1
7:06:30 - PLMT 1911 May 1
- 7:00 - ICT 1942 Dec 31 23:00
- 8:00 - IDT 1945 Mar 14 23:00
- 9:00 - JST 1945 Sep 2
- 7:00 - ICT 1947 Apr 1
- 8:00 - IDT 1954 Oct
- 7:00 - ICT
+ 7:00 - +07 1942 Dec 31 23:00
+ 8:00 - +08 1945 Mar 14 23:00
+ 9:00 - +09 1945 Sep 2
+ 7:00 - +07 1947 Apr 1
+ 8:00 - +08 1954 Oct
+ 7:00 - +07
# China
# Changbai Time ("Long-white Time", Long-white = Heilongjiang area)
# Heilongjiang (except Mohe county), Jilin
Zone Asia/Harbin 8:26:44 - LMT 1928 # or Haerbin
- 8:30 - CHAT 1932 Mar # Changbai Time
+ 8:30 - +0830 1932 Mar
8:00 - CST 1940
- 9:00 - CHAT 1966 May
- 8:30 - CHAT 1980 May
+ 9:00 - +09 1966 May
+ 8:30 - +0830 1980 May
8:00 PRC C%sT
# far west China
Zone Asia/Kashgar 5:03:56 - LMT 1928 # or Kashi or Kaxgar
- 5:30 - KAST 1940 # Kashgar Time
- 5:00 - KAST 1980 May
+ 5:30 - +0530 1940
+ 5:00 - +05 1980 May
8:00 PRC C%sT
# Kuwait
Zone Asia/Kuwait 3:11:56 - LMT 1950
- 3:00 - AST
+ 3:00 - +03
# 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
+ 4:00 - +04
# India
# From Paul Eggert (2014-08-11), after a heads-up from Stephen Colebourne:
# According to a Portuguese decree (1911-05-26)
-# http://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
+# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
# Portuguese India switched to UT +05 on 1912-01-01.
#Zone Asia/Panaji [not enough info to complete]
# transitions there.
Zone Asia/Phnom_Penh 6:59:40 - LMT 1906 Jul 1
7:06:30 - PLMT 1911 May 1
- 7:00 - ICT 1942 Dec 31 23:00
- 8:00 - IDT 1945 Mar 14 23:00
- 9:00 - JST 1945 Sep 2
- 7:00 - ICT 1947 Apr 1
- 8:00 - IDT 1953 Nov 9
- 7:00 - ICT
+ 7:00 - +07 1942 Dec 31 23:00
+ 8:00 - +08 1945 Mar 14 23:00
+ 9:00 - +09 1945 Sep 2
+ 7:00 - +07 1947 Apr 1
+ 8:00 - +08 1953 Nov 9
+ 7:00 - +07
# Israel
Zone Asia/Tel_Aviv 2:19:04 - LMT 1880
# this is probably wrong but it's better than guessing no transition.
Zone Asia/Vientiane 6:50:24 - LMT 1906 Jul 1
7:06:30 - PLMT 1911 May 1
- 7:00 - ICT 1942 Dec 31 23:00
- 8:00 - IDT 1945 Mar 14 23:00
- 9:00 - JST 1945 Sep 2
- 7:00 - ICT 1947 Apr 1
- 8:00 - IDT 1955 Apr 15
- 7:00 - ICT
+ 7:00 - +07 1942 Dec 31 23:00
+ 8:00 - +08 1945 Mar 14 23:00
+ 9:00 - +09 1945 Sep 2
+ 7:00 - +07 1947 Apr 1
+ 8:00 - +08 1955 Apr 15
+ 7:00 - +07
# Jan Mayen
# From Whitman:
-Zone Atlantic/Jan_Mayen -1:00 - EGT
+Zone Atlantic/Jan_Mayen -1:00 - -01
# St Helena
Zone Atlantic/St_Helena -0:22:48 - LMT 1890 # Jamestown
# " 3:00P Ar. MIDWAY ISLAND . . . . . . . . . M.L.T. Lv. 6:00A "
#
Zone Pacific/Midway -11:49:28 - LMT 1901
- -11:00 - NST 1956 Jun 3
- -11:00 1:00 NDT 1956 Sep 2
- -11:00 - NST 1967 Apr # N=Nome
- -11:00 - BST 1983 Nov 30 # B=Bering
- -11:00 - SST # S=Samoa
+ -11:00 - -11 1956 Jun 3
+ -11:00 1:00 -10 1956 Sep 2
+ -11:00 - -11
# N Mariana Is
Zone Pacific/Saipan -14:17:00 - LMT 1844 Dec 31
9:43:00 - LMT 1901
- 9:00 - MPT 1969 Oct # N Mariana Is Time
- 10:00 - MPT 2000 Dec 23
+ 9:00 - +09 1969 Oct
+ 10:00 - +10 2000 Dec 23
10:00 - ChST # Chamorro Standard Time
# the file CONTRIBUTING in the tz distribution.
-# From Paul Eggert (2014-10-31):
+# 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.
#
-# Gwillim Law writes that a good source
-# for recent time zone data is the International Air Transport
+# 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,
# History of Summer Time
#
# (1998-09-21, in Portuguese)
-
#
# I invented the abbreviations marked '*' in the following table;
-# the rest are from earlier versions of this file, or from other sources.
-# Corrections are welcome!
-# std dst 2dst
-# LMT Local Mean Time
-# -4:00 AST ADT Atlantic
-# -3:00 WGT WGST Western Greenland*
-# -1:00 EGT EGST Eastern Greenland*
-# 0:00 GMT BST BDST Greenwich, British Summer
-# 0:00 GMT IST Greenwich, Irish Summer
-# 0:00 WET WEST WEMT Western Europe
-# 0:19:32.13 AMT NST Amsterdam, Netherlands Summer (1835-1937)*
-# 0:20 NET NEST Netherlands (1937-1940)*
-# 1:00 BST British Standard (1968-1971)
-# 1:00 CET CEST CEMT Central Europe
-# 1:00:14 SET Swedish (1879-1899)*
-# 2:00 EET EEST Eastern Europe
-# 3:00 MSK MSD Moscow
+# 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
+# 0:19:32.13 AMT* NST* Amsterdam, Netherlands Summer (1835-1937)
+# 1:00 BST British Standard (1968-1971)
+# 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),
# The original six [EU members]: Belgium, France, (West) Germany, Italy,
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Europe/Dublin -0:25:00 - LMT 1880 Aug 2
- -0:25:21 - DMT 1916 May 21 2:00
+ -0:25:21 - DMT 1916 May 21 2:00 # Dublin MT
-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 2:00
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Danmarkshavn -1:14:40 - LMT 1916 Jul 28
- -3:00 - WGT 1980 Apr 6 2:00
- -3:00 EU WG%sT 1996
+ -3:00 - -03 1980 Apr 6 2:00
+ -3:00 EU -03/-02 1996
0:00 - GMT
Zone America/Scoresbysund -1:27:52 - LMT 1916 Jul 28 # Ittoqqortoormiit
- -2:00 - CGT 1980 Apr 6 2:00
- -2:00 C-Eur CG%sT 1981 Mar 29
- -1:00 EU EG%sT
+ -2:00 - -02 1980 Apr 6 2:00
+ -2:00 C-Eur -02/-01 1981 Mar 29
+ -1:00 EU -01/+00
Zone America/Godthab -3:26:56 - LMT 1916 Jul 28 # Nuuk
- -3:00 - WGT 1980 Apr 6 2:00
- -3:00 EU WG%sT
+ -3:00 - -03 1980 Apr 6 2:00
+ -3:00 EU -03/-02
Zone America/Thule -4:35:08 - LMT 1916 Jul 28 # Pituffik air base
-4:00 Thule A%sT
Rule Iceland 1967 only - Oct 29 1:00s 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Atlantic/Reykjavik -1:28 - LMT 1908
- -1:00 Iceland IS%sT 1968 Apr 7 1:00s
+ -1:00 Iceland -01/+00 1968 Apr 7 1:00s
0:00 - GMT
# Italy
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Europe/Amsterdam 0:19:32 - LMT 1835
0:19:32 Neth %s 1937 Jul 1
- 0:20 Neth NE%sT 1940 May 16 0:00 # Dutch Time
+ 0:20 Neth +0020/+0120 1940 May 16 0:00
1:00 C-Eur CE%sT 1945 Apr 2 2:00
1:00 Neth CE%sT 1977
1:00 EU CE%sT
0:00 W-Eur WE%sT 1992 Sep 27 1:00s
1:00 EU CE%sT 1996 Mar 31 1:00u
0:00 EU WE%sT
+# This Zone can be simplified once we assume zic %z.
Zone Atlantic/Azores -1:42:40 - LMT 1884 # Ponta Delgada
-1:54:32 - HMT 1912 Jan 1 # Horta Mean Time
- -2:00 Port AZO%sT 1966 Apr 3 2:00 # Azores Time
- -1:00 Port AZO%sT 1983 Sep 25 1:00s
- -1:00 W-Eur AZO%sT 1992 Sep 27 1:00s
+ -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 Apr 3 2:00
+ -1:00 Port -01/+00 1983 Sep 25 1:00s
+ -1:00 W-Eur -01/+00 1992 Sep 27 1:00s
0:00 EU WE%sT 1993 Mar 28 1:00u
- -1:00 EU AZO%sT
+ -1:00 EU -01/+00
+# This Zone can be simplified once we assume zic %z.
Zone Atlantic/Madeira -1:07:36 - LMT 1884 # Funchal
-1:07:36 - FMT 1912 Jan 1 # Funchal Mean Time
- -1:00 Port MAD%sT 1966 Apr 3 2:00 # Madeira Time
+ -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 Apr 3 2:00
0:00 Port WE%sT 1983 Sep 25 1:00s
0:00 EU WE%sT
3:00 - MSK
-# From Tim Parenti (2014-07-03):
-# Europe/Simferopol covers...
-# ** **** Crimea, Republic of
-# ** **** Sevastopol
+# 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
# See Europe/Belgrade.
# 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 1900-06-26 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 TYPE IN ON AT SAVE LETTER/S
-# For 1917-1919 Whitman gives Apr Sat>=1 - Oct Sat>=1;
-# go with Shanks & Pottenger.
-Rule Spain 1917 only - May 5 23:00s 1:00 S
-Rule Spain 1917 1919 - Oct 6 23:00s 0 -
-Rule Spain 1918 only - Apr 15 23:00s 1:00 S
-Rule Spain 1919 only - Apr 5 23:00s 1:00 S
-# Whitman gives 1921 Feb 28 - Oct 14; go with Shanks & Pottenger.
-Rule Spain 1924 only - Apr 16 23:00s 1:00 S
-# Whitman gives 1924 Oct 14; go with Shanks & Pottenger.
-Rule Spain 1924 only - Oct 4 23:00s 0 -
-Rule Spain 1926 only - Apr 17 23:00s 1:00 S
-# Whitman says no DST in 1929; go with Shanks & Pottenger.
-Rule Spain 1926 1929 - Oct Sat>=1 23:00s 0 -
-Rule Spain 1927 only - Apr 9 23:00s 1:00 S
-Rule Spain 1928 only - Apr 14 23:00s 1:00 S
-Rule Spain 1929 only - Apr 20 23:00s 1:00 S
-# Whitman gives 1937 Jun 16, 1938 Apr 16, 1940 Apr 13;
-# go with Shanks & Pottenger.
-Rule Spain 1937 only - May 22 23:00s 1:00 S
-Rule Spain 1937 1939 - Oct Sat>=1 23:00s 0 -
-Rule Spain 1938 only - Mar 22 23:00s 1:00 S
-Rule Spain 1939 only - Apr 15 23:00s 1:00 S
-Rule Spain 1940 only - Mar 16 23:00s 1:00 S
-# Whitman says no DST 1942-1945; go with Shanks & Pottenger.
-Rule Spain 1942 only - May 2 22:00s 2:00 M # Midsummer
-Rule Spain 1942 only - Sep 1 22:00s 1:00 S
-Rule Spain 1943 1946 - Apr Sat>=13 22:00s 2:00 M
-Rule Spain 1943 only - Oct 3 22:00s 1:00 S
-Rule Spain 1944 only - Oct 10 22:00s 1:00 S
-Rule Spain 1945 only - Sep 30 1:00 1:00 S
-Rule Spain 1946 only - Sep 30 0:00 0 -
+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 - Sep 30 1:00 0 -
-Rule Spain 1974 1975 - Apr Sat>=13 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 1978 - Apr 2 23:00 1:00 S
-Rule Spain 1978 only - Oct 1 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.
Rule SpainAfrica 1967 only - Jun 3 12:00 1:00 S
Rule SpainAfrica 1967 only - Oct 1 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 GMTOFF RULES FORMAT [UNTIL]
-Zone Europe/Madrid -0:14:44 - LMT 1901 Jan 1 0:00s
- 0:00 Spain WE%sT 1946 Sep 30
+Zone Europe/Madrid -0:14:44 - LMT 1900 Dec 31 23:45:16
+ 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
+Zone Africa/Ceuta -0:21:16 - LMT 1900 Dec 31 23:38:44
0:00 - WET 1918 May 6 23:00
0:00 1:00 WEST 1918 Oct 7 23:00
0:00 - WET 1924
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 - CANT 1946 Sep 30 1:00 # Canaries T
+ -1:00 - -01 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
# spelling, except omit the apostrophe as it is not allowed in
# portable Posix file names.
Zone Europe/Zaporozhye 2:20:40 - LMT 1880
- 2:20 - CUT 1924 May 2 # Central Ukraine T
+ 2:20 - +0220 1924 May 2
2:00 - EET 1930 Jun 21
3:00 - MSK 1941 Aug 25
1:00 C-Eur CE%sT 1943 Oct 25
Zone MST7MDT -7:00 US M%sT
Zone PST8PDT -8:00 US P%sT
-# From Bob Devine (1988-01-28):
-# ...Alaska (and Hawaii) had the timezone names changed in 1967.
-# old new
-# Pacific Standard Time(PST) -same-
-# Yukon Standard Time(YST) -same-
-# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST)
-# Nome Standard Time (NT) Bering Standard Time (BST)
-#
-# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
-# The YST zone now covers nearly all of the state, AHST just part
-# of the Aleutian islands. No DST.
-
-# From Paul Eggert (1995-12-19):
-# The tables below use 'NST', not 'NT', for Nome Standard Time.
-# I invented 'CAWT' for Central Alaska War Time.
-
# 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
# 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 (2000-01-08), following a 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".
# 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
-8:00 US P%sT
# Alaska
-# AK%sT is the modern abbreviation for -9:00 per USNO.
+# AK%sT is the modern abbreviation for -09 per USNO.
#
# From Paul Eggert (2001-05-30):
# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
-9:00 US AK%sT
Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18
-9:59:36 - LMT 1900 Aug 20 12:00
- -10:00 - CAT 1942
- -10:00 US CAT/CAWT 1945 Aug 14 23:00u
- -10:00 US CAT/CAPT 1946 # Peace
- -10:00 - CAT 1967 Apr
+ -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
-10:30 1:00 HDT 1945 Sep 30 2:00
-10:30 - HST 1947 Jun 8 2:00
-10:00 - HST
-Link Pacific/Honolulu Pacific/Johnston
# Now we turn to US areas that have diverged from the consensus since 1970.
################################################################################
-# From Paul Eggert (2014-10-31):
+# 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.
#
-# Gwillim Law writes that a good source
-# for recent time zone data is the International Air Transport
+# 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,
# Belize
# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD
-Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S
-Rule Belize 1973 only - Dec 5 0:00 1:00 D
-Rule Belize 1974 only - Feb 9 0:00 0 S
-Rule Belize 1982 only - Dec 18 0:00 1:00 D
-Rule Belize 1983 only - Feb 12 0:00 0 S
+Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 -0530
+Rule Belize 1919 1943 - Feb Sun>=9 0:00 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 GMTOFF RULES FORMAT [UNTIL]
Zone America/Belize -5:52:48 - LMT 1912 Apr
- -6:00 Belize C%sT
+ -6:00 Belize %s
# Bermuda
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule DR 1966 only - Oct 30 0:00 1:00 D
-Rule DR 1967 only - Feb 28 0:00 0 S
-Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD
-Rule DR 1970 only - Feb 21 0:00 0 S
-Rule DR 1971 only - Jan 20 0:00 0 S
-Rule DR 1972 1974 - Jan 21 0:00 0 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 GMTOFF 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 E%sT 1974 Oct 27
+ -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
# http://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 TYPE 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 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 GMTOFF 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
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
-4:00 - AST 1980 May
- -3:00 - PMST 1987 # Pierre & Miquelon Time
- -3:00 Canada PM%sT
+ -3:00 - -03 1987
+ -3:00 Canada -03/-02
# St Vincent and the Grenadines
# See America/Port_of_Spain.
# the file CONTRIBUTING in the tz distribution.
-# From Paul Eggert (2014-10-31):
+# 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.
#
-# Gwillim Law writes that a good source
-# for recent time zone data is the International Air Transport
+# 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,
# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
# http://www.jstor.org/stable/1774359
#
-# Earlier editions of these tables used the North American style (e.g. ARST and
-# ARDT for Argentine Standard and Daylight Time), but the following quote
-# suggests that it's better to use European style (e.g. ART and ARST).
-# I suggest the use of _Summer time_ instead of the more cumbersome
-# _daylight-saving time_. _Summer time_ seems to be in general use
-# in Europe and South America.
-# -- E O Cutler, _New York Times_ (1937-02-14), quoted in
-# H L Mencken, _The American Language: Supplement I_ (1960), p 466
-#
-# Earlier editions of these tables also used the North American style
-# for time zones in Brazil, but this was incorrect, as Brazilians say
-# "summer time". Reinaldo Goulart, a São Paulo businessman active in
-# the railroad sector, writes (1999-07-06):
-# The subject of time zones is currently a matter of discussion/debate in
-# Brazil. Let's say that "the Brasília time" is considered the
-# "official time" because Brasília is the capital city.
-# The other three time zones are called "Brasília time "minus one" or
-# "plus one" or "plus two". As far as I know there is no such
-# name/designation as "Eastern Time" or "Central Time".
-# So I invented the following (English-language) abbreviations for now.
-# Corrections are welcome!
-# std dst
-# -2:00 FNT FNST Fernando de Noronha
-# -3:00 BRT BRST Brasília
-# -4:00 AMT AMST Amazon
-# -5:00 ACT ACST Acre
+# These tables use numeric abbreviations like -03 and -0330 for
+# integer hour and minute UTC offsets. Although earlier editions used
+# alphabetic time zone abbreviations, these abbreviations were
+# invented and did not reflect common practice.
###############################################################################
#
# 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...
-#
-# I'm enclosing a patch that does what I say... regretfully, the San Luis
-# timezone must be called "WART/WARST" even when most of the time (like,
-# right now) WARST == ART... that is, since last Sunday, all the country
-# is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest
-# of the country calls it "ART".
# ...
# From Alexander Krivenyshev (2010-04-09):
# Buenos Aires (BA), Capital Federal (CF),
Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
-4:16:48 - CMT 1920 May # Córdoba Mean Time
- -4:00 - ART 1930 Dec
- -4:00 Arg AR%sT 1969 Oct 5
- -3:00 Arg AR%sT 1999 Oct 3
- -4:00 Arg AR%sT 2000 Mar 3
- -3:00 Arg AR%sT
+ -4:00 - -04 1930 Dec
+ -4:00 Arg -04/-03 1969 Oct 5
+ -3:00 Arg -03/-02 1999 Oct 3
+ -4:00 Arg -04/-03 2000 Mar 3
+ -3:00 Arg -03/-02
#
# Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN),
# Chaco (CC), Formosa (FM), Santiago del Estero (SE)
#
Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
-4:16:48 - CMT 1920 May
- -4:00 - ART 1930 Dec
- -4:00 Arg AR%sT 1969 Oct 5
- -3:00 Arg AR%sT 1991 Mar 3
- -4:00 - WART 1991 Oct 20
- -3:00 Arg AR%sT 1999 Oct 3
- -4:00 Arg AR%sT 2000 Mar 3
- -3:00 Arg AR%sT
+ -4:00 - -04 1930 Dec
+ -4:00 Arg -04/-03 1969 Oct 5
+ -3:00 Arg -03/-02 1991 Mar 3
+ -4:00 - -04 1991 Oct 20
+ -3:00 Arg -03/-02 1999 Oct 3
+ -4:00 Arg -04/-03 2000 Mar 3
+ -3:00 Arg -03/-02
#
# Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN)
Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
-4:16:48 - CMT 1920 May
- -4:00 - ART 1930 Dec
- -4:00 Arg AR%sT 1969 Oct 5
- -3:00 Arg AR%sT 1991 Mar 3
- -4:00 - WART 1991 Oct 20
- -3:00 Arg AR%sT 1999 Oct 3
- -4:00 Arg AR%sT 2000 Mar 3
- -3:00 Arg AR%sT 2008 Oct 18
- -3:00 - ART
+ -4:00 - -04 1930 Dec
+ -4:00 Arg -04/-03 1969 Oct 5
+ -3:00 Arg -03/-02 1991 Mar 3
+ -4:00 - -04 1991 Oct 20
+ -3:00 Arg -03/-02 1999 Oct 3
+ -4:00 Arg -04/-03 2000 Mar 3
+ -3:00 Arg -03/-02 2008 Oct 18
+ -3:00 - -03
#
# Tucumán (TM)
Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
-4:16:48 - CMT 1920 May
- -4:00 - ART 1930 Dec
- -4:00 Arg AR%sT 1969 Oct 5
- -3:00 Arg AR%sT 1991 Mar 3
- -4:00 - WART 1991 Oct 20
- -3:00 Arg AR%sT 1999 Oct 3
- -4:00 Arg AR%sT 2000 Mar 3
- -3:00 - ART 2004 Jun 1
- -4:00 - WART 2004 Jun 13
- -3:00 Arg AR%sT
+ -4:00 - -04 1930 Dec
+ -4:00 Arg -04/-03 1969 Oct 5
+ -3:00 Arg -03/-02 1991 Mar 3
+ -4:00 - -04 1991 Oct 20
+ -3:00 Arg -03/-02 1999 Oct 3
+ -4:00 Arg -04/-03 2000 Mar 3
+ -3:00 - -03 2004 Jun 1
+ -4:00 - -04 2004 Jun 13
+ -3:00 Arg -03/-02
#
# La Rioja (LR)
Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
-4:16:48 - CMT 1920 May
- -4:00 - ART 1930 Dec
- -4:00 Arg AR%sT 1969 Oct 5
- -3:00 Arg AR%sT 1991 Mar 1
- -4:00 - WART 1991 May 7
- -3:00 Arg AR%sT 1999 Oct 3
- -4:00 Arg AR%sT 2000 Mar 3
- -3:00 - ART 2004 Jun 1
- -4:00 - WART 2004 Jun 20
- -3:00 Arg AR%sT 2008 Oct 18
- -3:00 - ART
+ -4:00 - -04 1930 Dec
+ -4:00 Arg -04/-03 1969 Oct 5
+ -3:00 Arg -03/-02 1991 Mar 1
+ -4:00 - -04 1991 May 7
+ -3:00 Arg -03/-02 1999 Oct 3
+ -4:00 Arg -04/-03 2000 Mar 3
+ -3:00 - -03 2004 Jun 1
+ -4:00 - -04 2004 Jun 20
+ -3:00 Arg -03/-02 2008 Oct 18
+ -3:00 - -03
#
# San Juan (SJ)
Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
-4:16:48 - CMT 1920 May
- -4:00 - ART 1930 Dec
- -4:00 Arg AR%sT 1969 Oct 5
- -3:00 Arg AR%sT 1991 Mar 1
- -4:00 - WART 1991 May 7
- -3:00 Arg AR%sT 1999 Oct 3
- -4:00 Arg AR%sT 2000 Mar 3
- -3:00 - ART 2004 May 31
- -4:00 - WART 2004 Jul 25
- -3:00 Arg AR%sT 2008 Oct 18
- -3:00 - ART
+ -4:00 - -04 1930 Dec
+ -4:00 Arg -04/-03 1969 Oct 5
+ -3:00 Arg -03/-02 1991 Mar 1
+ -4:00 - -04 1991 May 7
+ -3:00 Arg -03/-02 1999 Oct 3
+ -4:00 Arg -04/-03 2000 Mar 3
+ -3:00 - -03 2004 May 31
+ -4:00 - -04 2004 Jul 25
+ -3:00 Arg -03/-02 2008 Oct 18
+ -3:00 - -03
#
# Jujuy (JY)
Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
-4:16:48 - CMT 1920 May
- -4:00 - ART 1930 Dec
- -4:00 Arg AR%sT 1969 Oct 5
- -3:00 Arg AR%sT 1990 Mar 4
- -4:00 - WART 1990 Oct 28
- -4:00 1:00 WARST 1991 Mar 17
- -4:00 - WART 1991 Oct 6
- -3:00 1:00 ARST 1992
- -3:00 Arg AR%sT 1999 Oct 3
- -4:00 Arg AR%sT 2000 Mar 3
- -3:00 Arg AR%sT 2008 Oct 18
- -3:00 - ART
+ -4:00 - -04 1930 Dec
+ -4:00 Arg -04/-03 1969 Oct 5
+ -3:00 Arg -03/-02 1990 Mar 4
+ -4:00 - -04 1990 Oct 28
+ -4:00 1:00 -03 1991 Mar 17
+ -4:00 - -04 1991 Oct 6
+ -3:00 1:00 -02 1992
+ -3:00 Arg -03/-02 1999 Oct 3
+ -4:00 Arg -04/-03 2000 Mar 3
+ -3:00 Arg -03/-02 2008 Oct 18
+ -3:00 - -03
#
# Catamarca (CT), Chubut (CH)
Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
-4:16:48 - CMT 1920 May
- -4:00 - ART 1930 Dec
- -4:00 Arg AR%sT 1969 Oct 5
- -3:00 Arg AR%sT 1991 Mar 3
- -4:00 - WART 1991 Oct 20
- -3:00 Arg AR%sT 1999 Oct 3
- -4:00 Arg AR%sT 2000 Mar 3
- -3:00 - ART 2004 Jun 1
- -4:00 - WART 2004 Jun 20
- -3:00 Arg AR%sT 2008 Oct 18
- -3:00 - ART
+ -4:00 - -04 1930 Dec
+ -4:00 Arg -04/-03 1969 Oct 5
+ -3:00 Arg -03/-02 1991 Mar 3
+ -4:00 - -04 1991 Oct 20
+ -3:00 Arg -03/-02 1999 Oct 3
+ -4:00 Arg -04/-03 2000 Mar 3
+ -3:00 - -03 2004 Jun 1
+ -4:00 - -04 2004 Jun 20
+ -3:00 Arg -03/-02 2008 Oct 18
+ -3:00 - -03
#
# Mendoza (MZ)
Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
-4:16:48 - CMT 1920 May
- -4:00 - ART 1930 Dec
- -4:00 Arg AR%sT 1969 Oct 5
- -3:00 Arg AR%sT 1990 Mar 4
- -4:00 - WART 1990 Oct 15
- -4:00 1:00 WARST 1991 Mar 1
- -4:00 - WART 1991 Oct 15
- -4:00 1:00 WARST 1992 Mar 1
- -4:00 - WART 1992 Oct 18
- -3:00 Arg AR%sT 1999 Oct 3
- -4:00 Arg AR%sT 2000 Mar 3
- -3:00 - ART 2004 May 23
- -4:00 - WART 2004 Sep 26
- -3:00 Arg AR%sT 2008 Oct 18
- -3:00 - ART
+ -4:00 - -04 1930 Dec
+ -4:00 Arg -04/-03 1969 Oct 5
+ -3:00 Arg -03/-02 1990 Mar 4
+ -4:00 - -04 1990 Oct 15
+ -4:00 1:00 -03 1991 Mar 1
+ -4:00 - -04 1991 Oct 15
+ -4:00 1:00 -03 1992 Mar 1
+ -4:00 - -04 1992 Oct 18
+ -3:00 Arg -03/-02 1999 Oct 3
+ -4:00 Arg -04/-03 2000 Mar 3
+ -3:00 - -03 2004 May 23
+ -4:00 - -04 2004 Sep 26
+ -3:00 Arg -03/-02 2008 Oct 18
+ -3:00 - -03
#
# San Luis (SL)
Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
-4:16:48 - CMT 1920 May
- -4:00 - ART 1930 Dec
- -4:00 Arg AR%sT 1969 Oct 5
- -3:00 Arg AR%sT 1990
- -3:00 1:00 ARST 1990 Mar 14
- -4:00 - WART 1990 Oct 15
- -4:00 1:00 WARST 1991 Mar 1
- -4:00 - WART 1991 Jun 1
- -3:00 - ART 1999 Oct 3
- -4:00 1:00 WARST 2000 Mar 3
- -3:00 - ART 2004 May 31
- -4:00 - WART 2004 Jul 25
- -3:00 Arg AR%sT 2008 Jan 21
- -4:00 SanLuis WAR%sT 2009 Oct 11
- -3:00 - ART
+ -4:00 - -04 1930 Dec
+ -4:00 Arg -04/-03 1969 Oct 5
+ -3:00 Arg -03/-02 1990
+ -3:00 1:00 -02 1990 Mar 14
+ -4:00 - -04 1990 Oct 15
+ -4:00 1:00 -03 1991 Mar 1
+ -4:00 - -04 1991 Jun 1
+ -3:00 - -03 1999 Oct 3
+ -4:00 1:00 -03 2000 Mar 3
+ -3:00 - -03 2004 May 31
+ -4:00 - -04 2004 Jul 25
+ -3:00 Arg -03/-02 2008 Jan 21
+ -4:00 SanLuis -04/-03 2009 Oct 11
+ -3:00 - -03
#
# Santa Cruz (SC)
Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
- -4:16:48 - CMT 1920 May # Córdoba Mean Time
- -4:00 - ART 1930 Dec
- -4:00 Arg AR%sT 1969 Oct 5
- -3:00 Arg AR%sT 1999 Oct 3
- -4:00 Arg AR%sT 2000 Mar 3
- -3:00 - ART 2004 Jun 1
- -4:00 - WART 2004 Jun 20
- -3:00 Arg AR%sT 2008 Oct 18
- -3:00 - ART
+ -4:16:48 - CMT 1920 May
+ -4:00 - -04 1930 Dec
+ -4:00 Arg -04/-03 1969 Oct 5
+ -3:00 Arg -03/-02 1999 Oct 3
+ -4:00 Arg -04/-03 2000 Mar 3
+ -3:00 - -03 2004 Jun 1
+ -4:00 - -04 2004 Jun 20
+ -3:00 Arg -03/-02 2008 Oct 18
+ -3:00 - -03
#
# Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF)
Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
- -4:16:48 - CMT 1920 May # Córdoba Mean Time
- -4:00 - ART 1930 Dec
- -4:00 Arg AR%sT 1969 Oct 5
- -3:00 Arg AR%sT 1999 Oct 3
- -4:00 Arg AR%sT 2000 Mar 3
- -3:00 - ART 2004 May 30
- -4:00 - WART 2004 Jun 20
- -3:00 Arg AR%sT 2008 Oct 18
- -3:00 - ART
+ -4:16:48 - CMT 1920 May
+ -4:00 - -04 1930 Dec
+ -4:00 Arg -04/-03 1969 Oct 5
+ -3:00 Arg -03/-02 1999 Oct 3
+ -4:00 Arg -04/-03 2000 Mar 3
+ -3:00 - -03 2004 May 30
+ -4:00 - -04 2004 Jun 20
+ -3:00 Arg -03/-02 2008 Oct 18
+ -3:00 - -03
# Aruba
Link America/Curacao America/Aruba
Zone America/La_Paz -4:32:36 - LMT 1890
-4:32:36 - CMT 1931 Oct 15 # Calamarca MT
-4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
- -4:00 - BOT # Bolivia Time
+ -4:00 - -04
# Brazil
#
# Fernando de Noronha (administratively part of PE)
Zone America/Noronha -2:09:40 - LMT 1914
- -2:00 Brazil FN%sT 1990 Sep 17
- -2:00 - FNT 1999 Sep 30
- -2:00 Brazil FN%sT 2000 Oct 15
- -2:00 - FNT 2001 Sep 13
- -2:00 Brazil FN%sT 2002 Oct 1
- -2:00 - FNT
+ -2:00 Brazil -02/-01 1990 Sep 17
+ -2:00 - -02 1999 Sep 30
+ -2:00 Brazil -02/-01 2000 Oct 15
+ -2:00 - -02 2001 Sep 13
+ -2:00 Brazil -02/-01 2002 Oct 1
+ -2:00 - -02
# 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).
# 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 BR%sT 1988 Sep 12
- -3:00 - BRT
+ -3:00 Brazil -03/-02 1988 Sep 12
+ -3:00 - -03
#
# west Pará (PA)
# West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém.
Zone America/Santarem -3:38:48 - LMT 1914
- -4:00 Brazil AM%sT 1988 Sep 12
- -4:00 - AMT 2008 Jun 24 0:00
- -3:00 - BRT
+ -4:00 Brazil -04/-03 1988 Sep 12
+ -4:00 - -04 2008 Jun 24 0:00
+ -3:00 - -03
#
# Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN),
# Paraíba (PB)
Zone America/Fortaleza -2:34:00 - LMT 1914
- -3:00 Brazil BR%sT 1990 Sep 17
- -3:00 - BRT 1999 Sep 30
- -3:00 Brazil BR%sT 2000 Oct 22
- -3:00 - BRT 2001 Sep 13
- -3:00 Brazil BR%sT 2002 Oct 1
- -3:00 - BRT
+ -3:00 Brazil -03/-02 1990 Sep 17
+ -3:00 - -03 1999 Sep 30
+ -3:00 Brazil -03/-02 2000 Oct 22
+ -3:00 - -03 2001 Sep 13
+ -3:00 Brazil -03/-02 2002 Oct 1
+ -3:00 - -03
#
# Pernambuco (PE) (except Atlantic islands)
Zone America/Recife -2:19:36 - LMT 1914
- -3:00 Brazil BR%sT 1990 Sep 17
- -3:00 - BRT 1999 Sep 30
- -3:00 Brazil BR%sT 2000 Oct 15
- -3:00 - BRT 2001 Sep 13
- -3:00 Brazil BR%sT 2002 Oct 1
- -3:00 - BRT
+ -3:00 Brazil -03/-02 1990 Sep 17
+ -3:00 - -03 1999 Sep 30
+ -3:00 Brazil -03/-02 2000 Oct 15
+ -3:00 - -03 2001 Sep 13
+ -3:00 Brazil -03/-02 2002 Oct 1
+ -3:00 - -03
#
# Tocantins (TO)
Zone America/Araguaina -3:12:48 - LMT 1914
- -3:00 Brazil BR%sT 1990 Sep 17
- -3:00 - BRT 1995 Sep 14
- -3:00 Brazil BR%sT 2003 Sep 24
- -3:00 - BRT 2012 Oct 21
- -3:00 Brazil BR%sT 2013 Sep
- -3:00 - BRT
+ -3:00 Brazil -03/-02 1990 Sep 17
+ -3:00 - -03 1995 Sep 14
+ -3:00 Brazil -03/-02 2003 Sep 24
+ -3:00 - -03 2012 Oct 21
+ -3:00 Brazil -03/-02 2013 Sep
+ -3:00 - -03
#
# Alagoas (AL), Sergipe (SE)
Zone America/Maceio -2:22:52 - LMT 1914
- -3:00 Brazil BR%sT 1990 Sep 17
- -3:00 - BRT 1995 Oct 13
- -3:00 Brazil BR%sT 1996 Sep 4
- -3:00 - BRT 1999 Sep 30
- -3:00 Brazil BR%sT 2000 Oct 22
- -3:00 - BRT 2001 Sep 13
- -3:00 Brazil BR%sT 2002 Oct 1
- -3:00 - BRT
+ -3:00 Brazil -03/-02 1990 Sep 17
+ -3:00 - -03 1995 Oct 13
+ -3:00 Brazil -03/-02 1996 Sep 4
+ -3:00 - -03 1999 Sep 30
+ -3:00 Brazil -03/-02 2000 Oct 22
+ -3:00 - -03 2001 Sep 13
+ -3:00 Brazil -03/-02 2002 Oct 1
+ -3:00 - -03
#
# 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 BR%sT 2003 Sep 24
- -3:00 - BRT 2011 Oct 16
- -3:00 Brazil BR%sT 2012 Oct 21
- -3:00 - BRT
+ -3:00 Brazil -03/-02 2003 Sep 24
+ -3:00 - -03 2011 Oct 16
+ -3:00 Brazil -03/-02 2012 Oct 21
+ -3:00 - -03
#
# 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 BR%sT 1963 Oct 23 0:00
- -3:00 1:00 BRST 1964
- -3:00 Brazil BR%sT
+ -3:00 Brazil -03/-02 1963 Oct 23 0:00
+ -3:00 1:00 -02 1964
+ -3:00 Brazil -03/-02
#
# Mato Grosso do Sul (MS)
Zone America/Campo_Grande -3:38:28 - LMT 1914
- -4:00 Brazil AM%sT
+ -4:00 Brazil -04/-03
#
# Mato Grosso (MT)
Zone America/Cuiaba -3:44:20 - LMT 1914
- -4:00 Brazil AM%sT 2003 Sep 24
- -4:00 - AMT 2004 Oct 1
- -4:00 Brazil AM%sT
+ -4:00 Brazil -04/-03 2003 Sep 24
+ -4:00 - -04 2004 Oct 1
+ -4:00 Brazil -04/-03
#
# Rondônia (RO)
Zone America/Porto_Velho -4:15:36 - LMT 1914
- -4:00 Brazil AM%sT 1988 Sep 12
- -4:00 - AMT
+ -4:00 Brazil -04/-03 1988 Sep 12
+ -4:00 - -04
#
# Roraima (RR)
Zone America/Boa_Vista -4:02:40 - LMT 1914
- -4:00 Brazil AM%sT 1988 Sep 12
- -4:00 - AMT 1999 Sep 30
- -4:00 Brazil AM%sT 2000 Oct 15
- -4:00 - AMT
+ -4:00 Brazil -04/-03 1988 Sep 12
+ -4:00 - -04 1999 Sep 30
+ -4:00 Brazil -04/-03 2000 Oct 15
+ -4:00 - -04
#
# 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 AM%sT 1988 Sep 12
- -4:00 - AMT 1993 Sep 28
- -4:00 Brazil AM%sT 1994 Sep 22
- -4:00 - AMT
+ -4:00 Brazil -04/-03 1988 Sep 12
+ -4:00 - -04 1993 Sep 28
+ -4:00 Brazil -04/-03 1994 Sep 22
+ -4:00 - -04
#
# 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 AC%sT 1988 Sep 12
- -5:00 - ACT 1993 Sep 28
- -5:00 Brazil AC%sT 1994 Sep 22
- -5:00 - ACT 2008 Jun 24 0:00
- -4:00 - AMT 2013 Nov 10
- -5:00 - ACT
+ -5:00 Brazil -05/-04 1988 Sep 12
+ -5:00 - -05 1993 Sep 28
+ -5:00 Brazil -05/-04 1994 Sep 22
+ -5:00 - -05 2008 Jun 24 0:00
+ -4:00 - -04 2013 Nov 10
+ -5:00 - -05
#
# Acre (AC)
Zone America/Rio_Branco -4:31:12 - LMT 1914
- -5:00 Brazil AC%sT 1988 Sep 12
- -5:00 - ACT 2008 Jun 24 0:00
- -4:00 - AMT 2013 Nov 10
- -5:00 - ACT
+ -5:00 Brazil -05/-04 1988 Sep 12
+ -5:00 - -05 2008 Jun 24 0:00
+ -4:00 - -04 2013 Nov 10
+ -5:00 - -05
# Chile
# to mean 24:00 mainland time, not 24:00 local time, so that Easter
# Island is always two hours behind the mainland.
+# 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 Deborah Goldsmith (2017-01-19):
+# http://www.diariooficial.interior.gob.cl/publicaciones/2017/01/17/41660/01/1169626.pdf
+# From Paul Eggert (2017-01-19):
+# The above says the Magallanes change expires 2019-05-11 at 24:00,
+# so in theory, they will revert to -04/-03 after that, which means
+# they will switch from -03 to -04 one hour after Santiago does that day.
+# For now, assume that they will not revert.
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Chile 1927 1931 - Sep 1 0:00 1:00 S
Rule Chile 1928 1932 - Apr 1 0:00 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Santiago -4:42:46 - LMT 1890
-4:42:46 - SMT 1910 Jan 10 # Santiago Mean Time
- -5:00 - CLT 1916 Jul 1 # Chile Time
+ -5:00 - -05 1916 Jul 1
-4:42:46 - SMT 1918 Sep 10
- -4:00 - CLT 1919 Jul 1
+ -4:00 - -04 1919 Jul 1
-4:42:46 - SMT 1927 Sep 1
- -5:00 Chile CL%sT 1932 Sep 1
- -4:00 - CLT 1942 Jun 1
- -5:00 - CLT 1942 Aug 1
- -4:00 - CLT 1946 Jul 15
- -4:00 1:00 CLST 1946 Sep 1 # central Chile
- -4:00 - CLT 1947 Apr 1
- -5:00 - CLT 1947 May 21 23:00
- -4:00 Chile CL%sT
+ -5:00 Chile -05/-04 1932 Sep 1
+ -4:00 - -04 1942 Jun 1
+ -5:00 - -05 1942 Aug 1
+ -4:00 - -04 1946 Jul 15
+ -4:00 1:00 -03 1946 Sep 1 # central Chile
+ -4:00 - -04 1947 Apr 1
+ -5:00 - -05 1947 May 21 23:00
+ -4:00 Chile -04/-03
+Zone America/Punta_Arenas -4:43:40 - LMT 1890
+ -4:42:46 - SMT 1910 Jan 10
+ -5:00 - -05 1916 Jul 1
+ -4:42:46 - SMT 1918 Sep 10
+ -4:00 - -04 1919 Jul 1
+ -4:42:46 - SMT 1927 Sep 1
+ -5:00 Chile -05/-04 1932 Sep 1
+ -4:00 - -04 1942 Jun 1
+ -5:00 - -05 1942 Aug 1
+ -4:00 - -04 1947 Apr 1
+ -5:00 - -05 1947 May 21 23:00
+ -4:00 Chile -04/-03 2016 Dec 4
+ -3:00 - -03
Zone Pacific/Easter -7:17:28 - LMT 1890
-7:17:28 - EMT 1932 Sep # Easter Mean Time
- -7:00 Chile EAS%sT 1982 Mar 14 3:00u # Easter Time
- -6:00 Chile EAS%sT
+ -7:00 Chile -07/-06 1982 Mar 14 3:00u # Easter Time
+ -6:00 Chile -06/-05
#
# Salas y Gómez Island is uninhabited.
# Other Chilean locations, including Juan Fernández Is, Desventuradas Is,
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Antarctica/Palmer 0 - -00 1965
- -4:00 Arg AR%sT 1969 Oct 5
- -3:00 Arg AR%sT 1982 May
- -4:00 Chile CL%sT
+ -4:00 Arg -04/-03 1969 Oct 5
+ -3:00 Arg -03/-02 1982 May
+ -4:00 Chile -04/-03 2016 Dec 4
+ -3:00 - -03
# Colombia
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Bogota -4:56:16 - LMT 1884 Mar 13
-4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time
- -5:00 CO CO%sT # Colombia Time
+ -5:00 CO -05/-04
# Malpelo, Providencia, San Andres
# no information; probably like America/Bogota
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad
- -4:30 - ANT 1965 # Netherlands Antilles Time
+ -4:30 - -0430 1965
-4:00 - AST
# From Arthur David Olson (2011-06-15):
#
# Milne says the Central and South American Telegraph Company used -5:24:15.
#
-# From Paul Eggert (2007-03-04):
-# Apparently Ecuador had a failed experiment with DST in 1992.
-# (2007-02-27) and
-# (2006-11-06) both
-# talk about "hora Sixto". Leave this alone for now, as we have no data.
+# From Alois Treindl (2016-12-15):
+# http://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):
+# http://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 TYPE IN ON AT SAVE LETTER/S
+Rule Ecuador 1992 only - Nov 28 0:00 1:00 S
+Rule Ecuador 1993 only - Feb 5 0:00 0 -
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Guayaquil -5:19:20 - LMT 1890
-5:14:00 - QMT 1931 # Quito Mean Time
- -5:00 - ECT # Ecuador Time
+ -5:00 Ecuador -05/-04
Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
- -5:00 - ECT 1986
- -6:00 - GALT # Galápagos Time
+ -5:00 - -05 1986
+ -6:00 Ecuador -06/-05
# Falklands
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Atlantic/Stanley -3:51:24 - LMT 1890
-3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
- -4:00 Falk FK%sT 1983 May # Falkland Is Time
- -3:00 Falk FK%sT 1985 Sep 15
- -4:00 Falk FK%sT 2010 Sep 5 2:00
- -3:00 - FKST
+ -4:00 Falk -04/-03 1983 May
+ -3:00 Falk -03/-02 1985 Sep 15
+ -4:00 Falk -04/-03 2010 Sep 5 2:00
+ -3:00 - -03
# French Guiana
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Cayenne -3:29:20 - LMT 1911 Jul
- -4:00 - GFT 1967 Oct # French Guiana Time
- -3:00 - GFT
+ -4:00 - -04 1967 Oct
+ -3:00 - -03
# Guyana
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
- -3:45 - GBGT 1966 May 26 # Br Guiana Time
- -3:45 - GYT 1975 Jul 31 # Guyana Time
- -3:00 - GYT 1991
+ -3:45 - -0345 1975 Jul 31
+ -3:00 - -03 1991
# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
- -4:00 - GYT
+ -4:00 - -04
# Paraguay
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Asuncion -3:50:40 - LMT 1890
-3:50:40 - AMT 1931 Oct 10 # Asunción Mean Time
- -4:00 - PYT 1972 Oct # Paraguay Time
- -3:00 - PYT 1974 Apr
- -4:00 Para PY%sT
+ -4:00 - -04 1972 Oct
+ -3:00 - -03 1974 Apr
+ -4:00 Para -04/-03
# Peru
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Lima -5:08:12 - LMT 1890
-5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
- -5:00 Peru PE%sT # Peru Time
+ -5:00 Peru -05/-04
# South Georgia
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
- -2:00 - GST # South Georgia Time
+ -2:00 - -02
# South Sandwich Is
# uninhabited; scientific personnel have wintered
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 - NEGT 1975 Nov 20 # Dutch Guiana Time
- -3:30 - SRT 1984 Oct # Suriname Time
- -3:00 - SRT
+ -3:30 - -0330 1984 Oct
+ -3:00 - -03
# Trinidad and Tobago
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
# [dated 2015-06-29; repeals Decree 311/006 dated 2006-09-04]
Rule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 S
Rule Uruguay 2007 2015 - Mar Sun>=8 2:00 0 -
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+
+# This Zone can be simplified once we assume zic %z.
Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
-3:44:44 - MMT 1920 May 1 # Montevideo MT
- -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
- -3:00 Uruguay UY%sT
+ -3:30 Uruguay -0330/-03 1942 Dec 14
+ -3:00 Uruguay -03/-02 1968
+ -3:00 Uruguay -03/-0230 1971
+ -3:00 Uruguay -03/-02 1974
+ -3:00 Uruguay -03/-0230 1974 Dec 22
+ -3:00 Uruguay -03/-02
# Venezuela
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Caracas -4:27:44 - LMT 1890
-4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
- -4:30 - VET 1965 Jan 1 0:00 # Venezuela T.
- -4:00 - VET 2007 Dec 9 3:00
- -4:30 - VET 2016 May 1 2:30
- -4:00 - VET
+ -4:30 - -0430 1965 Jan 1 0:00
+ -4:00 - -04 2007 Dec 9 3:00
+ -4:30 - -0430 2016 May 1 2:30
+ -4:00 - -04
+00 0
++00 0 D
+01 3600
+02 7200
+02 7200 D
+03 10800
++0330 12600
+04 14400
++0430 16200
++0430 16200 D
+05 18000
+0530 19800
++0545 20700
+06 21600
++0630 23400
+07 25200
+08 28800
++0845 31500
+09 32400
+10 36000
++1030 37800
+11 39600
++11 39600 D
+12 43200
++1245 45900
+13 46800
++13 46800 D
++1345 49500 D
+14 50400
+14 50400 D
-00 0
-01 -3600
-02 -7200
+-02 -7200 D
-03 -10800
+-03 -10800 D
-04 -14400
-05 -18000
+-05 -18000 D
-06 -21600
-07 -25200
-08 -28800
-09 -32400
+-0930 -34200
-10 -36000
-11 -39600
-12 -43200
ACDT 37800 D
ACST 34200
-ACT -18000
-ACWST 31500
ADT -10800 D
AEDT 39600 D
AEST 36000
-AFT 16200
AKDT -28800 D
AKST -32400
-AMST -10800 D
-AMT -14400
-ART -10800
AST -14400
-AST 10800
AWST 28800
-AZOST 0 D
-AZOT -3600
-BDT 21600
-BNT 28800
-BOT -14400
-BRST -7200 D
-BRT -10800
BST 3600 D
-BST 39600
-BTT 21600
CAT 7200
-CCT 23400
CDT -14400 D
CDT -18000 D
CEST 7200 D
CET 3600
-CHADT 49500 D
-CHAST 45900
-CHOST 32400 D
-CHOT 28800
-CHUT 36000
-CKT -36000
-CLST -10800 D
-CLT -14400
-COT -18000
CST -18000
CST -21600
CST 28800
-CVT -3600
-CXT 25200
ChST 36000
-EASST -18000 D
-EAST -21600
EAT 10800
-ECT -18000
EDT -14400 D
EEST 10800 D
EET 7200
-EGST 0 D
-EGT -3600
EST -18000
-FJST 46800 D
-FJT 43200
-FKST -10800
-FNT -7200
-GALT -21600
-GAMT -32400
-GFT -10800
-GILT 43200
GMT 0
-GST -7200
-GST 14400
-GYT -14400
HDT -32400 D
HKT 28800
-HOVST 28800 D
-HOVT 25200
HST -36000
-ICT 25200
IDT 10800 D
-IOT 21600
-IRDT 16200 D
-IRST 12600
IST 19800
IST 3600 D
IST 7200
JST 32400
-KOST 39600
KST 30600
KST 32400
-LHDT 39600 D
-LHST 37800
-LINT 50400
-MART -34200
MDT -21600 D
MEST 7200 D
MET 3600
-MHT 43200
-MIST 39600
-MMT 23400
MSK 10800
MST -25200
-MUT 14400
-MVT 18000
-MYT 28800
-NCT 39600
NDT -9000 D
-NFT 39600
-NPT 20700
-NRT 43200
NST -12600
-NUT -39600
NZDT 46800 D
NZST 43200
PDT -25200 D
-PET -18000
-PGT 36000
-PHOT 46800
-PHT 28800
PKT 18000
-PMDT -7200 D
-PMST -10800
-PONT 39600
PST -28800
-PWT 32400
-PYST -10800 D
-PYT -14400
-RET 14400
SAST 7200
-SBT 39600
-SCT 14400
-SGT 28800
-SRT -10800
SST -39600
-TAHT -36000
-TKT 46800
-TLT 32400
-TVT 43200
UCT 0
-ULAST 32400 D
-ULAT 28800
UTC 0
-UYT -10800
-VET -14400
-VUT 39600
-WAKT 43200
WAST 7200 D
WAT 3600
WEST 3600 D
WET 0
-WFT 43200
-WGST -7200 D
-WGT -10800
WIB 25200
WIT 32400
WITA 28800
-WSDT 50400 D
-WSST 46800
-XJT 21600
# Acre time is sometimes called Acre Standard Time (AST) which leads to a
# conflict with AST (see below at AST)
-ACT -18000 # Acre Time
- # (America/Eirunepe)
- # (America/Rio_Branco)
+ACT -18000 # Acre Time (obsolete)
# CONFLICT! ACST is not unique
# Other timezones:
# - ACST: Australian Central Standard Time
# CONFLICT! AMST is not unique
# Other timezones:
# - AMST: Armenia Summer Time (Asia)
-AMST -10800 D # Amazon Summer Time
- # (America/Campo_Grande)
- # (America/Cuiaba)
+AMST -10800 D # Amazon Summer Time (obsolete)
# CONFLICT! AMT is not unique
# Other timezones:
# - AMT: Armenia Time (Asia)
-AMT -14400 # Amazon Time
- # (America/Boa_Vista)
- # (America/Campo_Grande)
- # (America/Cuiaba)
- # (America/Manaus)
- # (America/Porto_Velho)
-ART America/Argentina/Buenos_Aires # Argentina Time
- # (America/Argentina/Buenos_Aires)
- # (America/Argentina/Cordoba)
- # (America/Argentina/Tucuman)
- # (America/Argentina/La_Rioja)
- # (America/Argentina/San_Juan)
- # (America/Argentina/Jujuy)
- # (America/Argentina/Catamarca)
- # (America/Argentina/Mendoza)
- # (America/Argentina/Rio_Gallegos)
- # (America/Argentina/Ushuaia)
-ARST America/Argentina/Buenos_Aires # Argentina Summer Time
+AMT -14400 # Amazon Time (obsolete)
+ART America/Argentina/Buenos_Aires # Argentina Time (obsolete)
+ARST America/Argentina/Buenos_Aires # Argentina Summer Time (obsolete)
# CONFLICT! AST is not unique
# Other timezones:
# - AST: Arabic Standard Time (Asia)
# (America/Thule)
# (America/Tortola)
# (Atlantic/Bermuda)
-BOT -14400 # Bolivia Time
- # (America/La_Paz)
+BOT -14400 # Bolivia Time (obsolete)
BRA -10800 # Brazil Time (not in IANA database)
-BRST -7200 D # Brasil Summer Time
- # (America/Sao_Paulo)
-BRT -10800 # Brasil Time
- # (America/Araguaina)
- # (America/Bahia)
- # (America/Belem)
- # (America/Fortaleza)
- # (America/Maceio)
- # (America/Recife)
- # (America/Sao_Paulo)
+BRST -7200 D # Brasil Summer Time (obsolete)
+BRT -10800 # Brasil Time (obsolete)
# CONFLICT! CDT is not unique
# Other timezones:
# - CDT: Central Daylight Time (America)
# (America/Rainy_River)
# (America/Rankin_Inlet)
# (America/Winnipeg)
-CLST -10800 D # Chile Summer Time
- # (America/Santiago)
- # (Antarctica/Palmer)
-CLT America/Santiago # Chile Time
- # (America/Santiago)
- # (Antarctica/Palmer)
-COT -18000 # Columbia Time (not in IANA database)
+CLST -10800 D # Chile Summer Time (obsolete)
+CLT America/Santiago # Chile Time (obsolete)
+COT -18000 # Columbia Time (obsolete)
# CONFLICT! CST is not unique
# Other timezones:
# - CST: Central Standard Time (Australia)
# (America/Regina)
# (America/Swift_Current)
# (America/Winnipeg)
-ECT -18000 # Ecuador Time
- # Eastern Caribbean Time
- # (America/Guayaquil)
+ECT -18000 # Ecuador Time (obsolete)
EDT -14400 D # Eastern Daylight Saving Time
# (America/Detroit)
# (America/Grand_Turk)
# (America/Pangnirtung)
# (America/Thunder_Bay)
# (America/Toronto)
-EGST 0 D # East Greenland Summer Time
- # (America/Scoresbysund)
-EGT -3600 # East Greenland Time (Svalbard & Jan Mayen)
- # (America/Scoresbysund)
+EGST 0 D # East Greenland Summer Time (obsolete)
+EGT -3600 # East Greenland Time (Svalbard & Jan Mayen) (obsolete)
# CONFLICT! EST is not unique
# Other timezones:
# - EST: Eastern Standard Time (Australia)
# (America/Pangnirtung)
# (America/Thunder_Bay)
# (America/Toronto)
-FNT -7200 # Fernando de Noronha Time
- # (America/Noronha)
-FNST -3600 D # Fernando de Noronha Summer Time (not in IANA database)
- # (America/Noronha)
-GFT -10800 # French Guiana Time
- # (America/Cayenne)
+FNT -7200 # Fernando de Noronha Time (obsolete)
+FNST -3600 D # Fernando de Noronha Summer Time (obsolete)
+GFT -10800 # French Guiana Time (obsolete)
GMT 0 # Greenwich Mean Time
# (Africa/Abidjan)
# (Africa/Bamako)
# (Etc/GMT)
# (Europe/Dublin)
# (Europe/London)
-GYT America/Guyana # Guyana Time
- # (America/Guyana)
+GYT America/Guyana # Guyana Time (obsolete)
HADT -32400 D # Hawaii-Aleutian Daylight Time (obsolete abbreviation)
# (America/Adak)
HAST -36000 # Hawaii-Aleutian Standard Time (obsolete abbreviation)
# (America/Tijuana)
# (America/Vancouver)
# (America/Whitehorse)
-PET -18000 # Peru Time (not in IANA database)
-PMDT -7200 D # Pierre & Miquelon Daylight Time
- # (America/Miquelon)
-PMST -10800 # Pierre & Miquelon Standard Time
- # (America/Miquelon)
+PET -18000 # Peru Time (obsolete)
+PMDT -7200 D # Pierre & Miquelon Daylight Time (obsolete)
+PMST -10800 # Pierre & Miquelon Standard Time (obsolete)
PST -28800 # Pacific Standard Time
# (America/Dawson)
# (America/Los_Angeles)
# (America/Vancouver)
# (America/Whitehorse)
# (Pacific/Pitcairn)
-PYST -10800 D # Paraguay Summer Time
- # (America/Asuncion)
-PYT America/Asuncion # Paraguay Time
- # (America/Asuncion)
-SRT America/Paramaribo # Suriname Time
- # (America/Paramaribo)
+PYST -10800 D # Paraguay Summer Time (obsolete)
+PYT America/Asuncion # Paraguay Time (obsolete)
+SRT America/Paramaribo # Suriname Time (obsolete)
UYST -7200 D # Uruguay Summer Time (obsolete)
- # (America/Montevideo)
-UYT -10800 # Uruguay Time
- # (America/Montevideo)
-VET America/Caracas # Venezuela Time
- # (America/Caracas)
-WGST -7200 D # Western Greenland Summer Time
- # (America/Godthab)
-WGT -10800 # West Greenland Time
- # (America/Godthab)
+UYT -10800 # Uruguay Time (obsolete)
+VET America/Caracas # Venezuela Time (obsolete)
+WGST -7200 D # Western Greenland Summer Time (obsolete)
+WGT -10800 # West Greenland Time (obsolete)
AWST 28800 # Australian Western Standard Time
# (Antarctica/Casey)
# (Australia/Perth)
-CLST -10800 D # Chile Summer Time
- # (America/Santiago)
- # (Antarctica/Palmer)
-CLT America/Santiago # Chile Time
- # (America/Santiago)
- # (Antarctica/Palmer)
+CLST -10800 D # Chile Summer Time (obsolete)
+CLT America/Santiago # Chile Time (obsolete)
DAVT Antarctica/Davis # Davis Time (Antarctica) (obsolete)
DDUT 36000 # Dumont-d`Urville Time (Antarctica) (obsolete)
MAWT Antarctica/Mawson # Mawson Time (Antarctica) (obsolete)
-MIST 39600 # Macquarie Island Time
- # (Antarctica/Macquarie)
+MIST 39600 # Macquarie Island Time (obsolete)
NZDT 46800 D # New Zealand Daylight Time
# (Antarctica/McMurdo)
# (Pacific/Auckland)
# src/timezone/tznames/Asia.txt
#
-AFT 16200 # Afghanistan Time
- # (Asia/Kabul)
+AFT 16200 # Afghanistan Time (obsolete)
ALMST 25200 D # Alma-Ata Summer Time (obsolete)
ALMT 21600 # Alma-Ata Time (obsolete)
# CONFLICT! AMST is not unique
# Other timezones:
# - AMST: Amazon Summer Time (America)
-AMST Asia/Yerevan # Armenia Summer Time
- # (Asia/Yerevan)
+AMST Asia/Yerevan # Armenia Summer Time (obsolete)
# CONFLICT! AMT is not unique
# Other timezones:
# - AMT: Amazon Time (America)
# - AST: Antigua Standard Time (America) same offset as Atlantic Standard Time
# - AST: Antilles Standard Time (America) same offset as Atlantic Standard Time
# - AST: Al Manamah Standard Time (Asia) same offset as Arabia Standard Time
-AST 10800 # Arabia Standard Time
- # (Asia/Aden)
- # (Asia/Baghdad)
- # (Asia/Bahrain)
- # (Asia/Kuwait)
- # (Asia/Qatar)
- # (Asia/Riyadh)
+AST 10800 # Arabia Standard Time (obsolete)
AZST Asia/Baku # Azerbaijan Summer Time (obsolete)
AZT Asia/Baku # Azerbaijan Time (obsolete)
-BDT 21600 # Bangladesh Time
- # (Asia/Dhaka)
-BNT 28800 # Brunei Darussalam Time
- # (Asia/Brunei)
+BDT 21600 # Bangladesh Time (obsolete)
+BNT 28800 # Brunei Darussalam Time (obsolete)
BORT 28800 # Borneo Time (Indonesia) (not in IANA database)
-BTT 21600 # Bhutan Time
- # (Asia/Thimphu)
+BTT 21600 # Bhutan Time (obsolete)
CCT 28800 # China Coastal Time (not in IANA database)
-CHOST Asia/Choibalsan # Choibalsan Summer Time
- # (Asia/Choibalsan)
-CHOT Asia/Choibalsan # Choibalsan Time
- # (Asia/Choibalsan)
+CHOST Asia/Choibalsan # Choibalsan Summer Time (obsolete)
+CHOT Asia/Choibalsan # Choibalsan Time (obsolete)
CIT 28800 # Central Indonesia Time (obsolete, WITA is now preferred)
# CONFLICT! CST is not unique
# Other timezones:
# CONFLICT! GST is not unique
# Other timezones:
# - GST: South Georgia Time (Atlantic)
-GST 14400 # Gulf Standard Time
- # (Asia/Dubai)
- # (Asia/Muscat)
-HKT 28800 # Hong Kong Time (not in IANA database)
-HOVST 28800 D # Hovd Summer Time
- # (Asia/Hovd)
-HOVT Asia/Hovd # Hovd Time
- # (Asia/Hovd)
-ICT 25200 # Indochina Time
- # (Asia/Bangkok)
- # (Asia/Phnom_Penh)
- # (Asia/Saigon)
- # (Asia/Vientiane)
+GST 14400 # Gulf Standard Time (obsolete)
+HKT 28800 # Hong Kong Time
+ # (Asia/Hong_Kong)
+HOVST 28800 D # Hovd Summer Time (obsolete)
+HOVT Asia/Hovd # Hovd Time (obsolete)
+ICT 25200 # Indochina Time (obsolete)
IDT 10800 D # Israel Daylight Time
# (Asia/Jerusalem)
-IRDT Asia/Tehran # Iran Daylight Time
- # (Asia/Tehran)
+IRDT Asia/Tehran # Iran Daylight Time (obsolete)
IRKST Asia/Irkutsk # Irkutsk Summer Time (obsolete)
IRKT Asia/Irkutsk # Irkutsk Time (obsolete)
-IRST Asia/Tehran # Iran Standard Time
- # (Asia/Tehran)
+IRST Asia/Tehran # Iran Standard Time (obsolete)
IRT 12600 # Iran Time (not in IANA database)
# CONFLICT! IST is not unique
# Other timezones:
LKT Asia/Colombo # Lanka Time (obsolete)
MAGST Asia/Magadan # Magadan Summer Time (obsolete)
MAGT Asia/Magadan # Magadan Time (obsolete)
-MMT 23400 # Myanmar Time
- # (Asia/Yangon)
-MYT 28800 # Malaysia Time
- # (Asia/Kuala_Lumpur)
- # (Asia/Kuching)
+MMT 23400 # Myanmar Time (obsolete)
+MYT 28800 # Malaysia Time (obsolete)
NOVST Asia/Novosibirsk # Novosibirsk Summer Time (obsolete)
NOVT Asia/Novosibirsk # Novosibirsk Time (obsolete)
-NPT 20700 # Nepal Time
- # (Asia/Katmandu)
+NPT 20700 # Nepal Time (obsolete)
OMSST Asia/Omsk # Omsk Summer Time (obsolete)
OMST Asia/Omsk # Omsk Time (obsolete)
ORAT Asia/Oral # Oral Time (obsolete)
PETST Asia/Kamchatka # Petropavlovsk-Kamchatski Summer Time (obsolete)
PETT Asia/Kamchatka # Petropavlovsk-Kamchatski Time (obsolete)
-PHT 28800 # Philippine Time
- # (Asia/Manila)
+PHT 28800 # Philippine Time (obsolete)
PKT 18000 # Pakistan Time
# (Asia/Karachi)
PKST 21600 D # Pakistan Summer Time
QYZT 21600 # Kizilorda Time (obsolete)
SAKST Asia/Sakhalin # Sakhalin Summer Time (obsolete)
SAKT Asia/Sakhalin # Sakhalin Time (obsolete)
-SGT Asia/Singapore # Singapore Time
- # (Asia/Singapore)
+SGT Asia/Singapore # Singapore Time (obsolete)
SRET 39600 # Srednekolymsk Time (obsolete)
TJT 18000 # Tajikistan Time (obsolete)
-TLT 32400 # East Timor Time
- # (Asia/Dili)
+TLT 32400 # East Timor Time (obsolete)
TMT Asia/Ashgabat # Turkmenistan Time (obsolete)
-ULAST 32400 D # Ulan Bator Summer Time
- # (Asia/Ulaanbaatar)
-ULAT Asia/Ulaanbaatar # Ulan Bator Time
- # (Asia/Ulaanbaatar)
-UZST 21600 D # Uzbekistan Summer Time
- # (Asia/Samarkand)
- # (Asia/Tashkent)
+ULAST 32400 D # Ulan Bator Summer Time (obsolete)
+ULAT Asia/Ulaanbaatar # Ulan Bator Time (obsolete)
+UZST 21600 D # Uzbekistan Summer Time (obsolete)
UZT 18000 # Uzbekistan Time (obsolete)
VLAST Asia/Vladivostok # Vladivostok Summer Time (obsolete)
VLAT Asia/Vladivostok # Vladivostok Time (obsolete)
# (Asia/Jayapura)
WITA 28800 # Waktu Indonesia Tengah
# (Asia/Makassar)
-XJT 21600 # Xinjiang Time
- # (Asia/Urumqi)
+XJT 21600 # Xinjiang Time (obsolete)
YAKST Asia/Yakutsk # Yakutsk Summer Time (obsolete)
YAKT Asia/Yakutsk # Yakutsk Time (obsolete)
YEKST 21600 D # Yekaterinburg Summer Time (obsolete)
# (America/Thule)
# (America/Tortola)
# (Atlantic/Bermuda)
-AZOST 0 D # Azores Summer Time
- # (Atlantic/Azores)
-AZOT -3600 # Azores Time
- # (Atlantic/Azores)
-CVT Atlantic/Cape_Verde # Cape Verde Time
- # (Atlantic/Cape_Verde)
-FKST Atlantic/Stanley # Falkland Islands Summer/Standard Time
- # (Atlantic/Stanley)
+AZOST 0 D # Azores Summer Time (obsolete)
+AZOT -3600 # Azores Time (obsolete)
+CVT Atlantic/Cape_Verde # Cape Verde Time (obsolete)
+FKST Atlantic/Stanley # Falkland Islands Summer/Standard Time (obsolete)
FKT Atlantic/Stanley # Falkland Islands Time (obsolete)
GMT 0 # Greenwich Mean Time
# (Africa/Abidjan)
# CONFLICT! GST is not unique
# Other timezones:
# - GST: Gulf Standard Time (Asia)
-GST -7200 # South Georgia Time (Atlantic)
- # (Atlantic/South_Georgia)
+GST -7200 # South Georgia Time (Atlantic) (obsolete)
WEST 3600 D # Western Europe Summer Time
# (Atlantic/Canary)
# (Atlantic/Faeroe)
# (Australia/Adelaide)
# (Australia/Broken_Hill)
# (Australia/Darwin)
-ACWST 31500 # Australian Central Western Standard Time
- # (Australia/Eucla)
+ACWST 31500 # Australian Central Western Standard Time (obsolete)
AESST 39600 D # Australia Eastern Summer Standard Time (not in IANA database)
AEDT 39600 D # Australian Eastern Daylight Time
# (Australia/Brisbane)
# Other timezones:
# - EST: Eastern Standard Time (America)
EST 36000 # Eastern Standard Time (not in IANA database)
-LHDT Australia/Lord_Howe # Lord Howe Daylight Time
- # (Australia/Lord_Howe)
-LHST 37800 # Lord Howe Standard Time
- # (Australia/Lord_Howe)
+LHDT Australia/Lord_Howe # Lord Howe Daylight Time (obsolete)
+LHST 37800 # Lord Howe Standard Time (obsolete)
LIGT 36000 # Melbourne, Australia (not in IANA database)
NZT 43200 # New Zealand Time (not in IANA database)
SADT 37800 D # South Australian Daylight-Saving Time (not in IANA database)
# Acre time is sometimes called Acre Standard Time (AST) which leads to a
# conflict with AST (see below at AST)
-ACT -18000 # Acre Time
- # (America/Eirunepe)
- # (America/Rio_Branco)
+ACT -18000 # Acre Time (obsolete)
AKDT -28800 D # Alaska Daylight Time
# (America/Anchorage)
# (America/Juneau)
# (America/Juneau)
# (America/Nome)
# (America/Yakutat)
-ART America/Argentina/Buenos_Aires # Argentina Time
- # (America/Argentina/Buenos_Aires)
- # (America/Argentina/Cordoba)
- # (America/Argentina/Tucuman)
- # (America/Argentina/La_Rioja)
- # (America/Argentina/San_Juan)
- # (America/Argentina/Jujuy)
- # (America/Argentina/Catamarca)
- # (America/Argentina/Mendoza)
- # (America/Argentina/Rio_Gallegos)
- # (America/Argentina/Ushuaia)
-ARST America/Argentina/Buenos_Aires # Argentina Summer Time
-BOT -14400 # Bolivia Time
- # (America/La_Paz)
+ART America/Argentina/Buenos_Aires # Argentina Time (obsolete)
+ARST America/Argentina/Buenos_Aires # Argentina Summer Time (obsolete)
+BOT -14400 # Bolivia Time (obsolete)
BRA -10800 # Brazil Time (not in IANA database)
-BRST -7200 D # Brasil Summer Time
- # (America/Sao_Paulo)
-BRT -10800 # Brasil Time
- # (America/Araguaina)
- # (America/Bahia)
- # (America/Belem)
- # (America/Fortaleza)
- # (America/Maceio)
- # (America/Recife)
- # (America/Sao_Paulo)
-COT -18000 # Columbia Time (not in IANA database)
+BRST -7200 D # Brasil Summer Time (obsolete)
+BRT -10800 # Brasil Time (obsolete)
+COT -18000 # Columbia Time (obsolete)
# CONFLICT! CDT is not unique
# Other timezones:
# - CDT: Mexico Central Daylight Time (America)
# (America/Rainy_River)
# (America/Rankin_Inlet)
# (America/Winnipeg)
-CLST -10800 D # Chile Summer Time
- # (America/Santiago)
- # (Antarctica/Palmer)
-CLT America/Santiago # Chile Time
- # (America/Santiago)
- # (Antarctica/Palmer)
+CLST -10800 D # Chile Summer Time (obsolete)
+CLT America/Santiago # Chile Time (obsolete)
# CONFLICT! CST is not unique
# Other timezones:
# - CST: Central Standard Time (Australia)
# (America/Pangnirtung)
# (America/Thunder_Bay)
# (America/Toronto)
-EGST 0 D # East Greenland Summer Time
- # (America/Scoresbysund)
-EGT -3600 # East Greenland Time (Svalbard & Jan Mayen)
- # (America/Scoresbysund)
+EGST 0 D # East Greenland Summer Time (obsolete)
+EGT -3600 # East Greenland Time (Svalbard & Jan Mayen) (obsolete)
# CONFLICT! EST is not unique
# Other timezones:
# - EST: Eastern Standard Time (Australia)
# (America/Pangnirtung)
# (America/Thunder_Bay)
# (America/Toronto)
-FNT -7200 # Fernando de Noronha Time
- # (America/Noronha)
-FNST -3600 D # Fernando de Noronha Summer Time (not in IANA database)
- # (America/Noronha)
-GFT -10800 # French Guiana Time
- # (America/Cayenne)
-GYT America/Guyana # Guyana Time
- # (America/Guyana)
+FNT -7200 # Fernando de Noronha Time (obsolete)
+FNST -3600 D # Fernando de Noronha Summer Time (obsolete)
+GFT -10800 # French Guiana Time (obsolete)
+GYT America/Guyana # Guyana Time (obsolete)
MDT -21600 D # Mexico Mountain Daylight Time
# Mountain Daylight Time
# (America/Boise)
# (America/Yellowknife)
NDT -9000 D # Newfoundland Daylight Time
# (America/St_Johns)
+# CONFLICT! NFT is not unique
+# Other timezones:
+# - NFT: Norfolk Time (Pacific)
+NFT -12600 # Newfoundland Time (not in IANA database)
NST -12600 # Newfoundland Standard Time
# (America/St_Johns)
-PET -18000 # Peru Time (not in IANA database)
+PET -18000 # Peru Time (obsolete)
PDT -25200 D # Pacific Daylight Time
# (America/Dawson)
# (America/Los_Angeles)
# (America/Tijuana)
# (America/Vancouver)
# (America/Whitehorse)
-PMDT -7200 D # Pierre & Miquelon Daylight Time
- # (America/Miquelon)
-PMST -10800 # Pierre & Miquelon Standard Time
- # (America/Miquelon)
+PMDT -7200 D # Pierre & Miquelon Daylight Time (obsolete)
+PMST -10800 # Pierre & Miquelon Standard Time (obsolete)
PST -28800 # Pacific Standard Time
# (America/Dawson)
# (America/Los_Angeles)
# (America/Vancouver)
# (America/Whitehorse)
# (Pacific/Pitcairn)
-PYST -10800 D # Paraguay Summer Time
- # (America/Asuncion)
-PYT America/Asuncion # Paraguay Time
- # (America/Asuncion)
+PYST -10800 D # Paraguay Summer Time (obsolete)
+PYT America/Asuncion # Paraguay Time (obsolete)
UYST -7200 D # Uruguay Summer Time (obsolete)
- # (America/Montevideo)
-UYT -10800 # Uruguay Time
- # (America/Montevideo)
-VET America/Caracas # Venezuela Time
- # (America/Caracas)
-WGST -7200 D # Western Greenland Summer Time
- # (America/Godthab)
-WGT -10800 # West Greenland Time
- # (America/Godthab)
+UYT -10800 # Uruguay Time (obsolete)
+VET America/Caracas # Venezuela Time (obsolete)
+WGST -7200 D # Western Greenland Summer Time (obsolete)
+WGT -10800 # West Greenland Time (obsolete)
#################### ANTARCTICA ####################
#################### ASIA ####################
-AFT 16200 # Afghanistan Time
- # (Asia/Kabul)
+AFT 16200 # Afghanistan Time (obsolete)
ALMT 21600 # Alma-Ata Time (obsolete)
ALMST 25200 D # Alma-Ata Summer Time (obsolete)
# CONFLICT! AMST is not unique
# Other timezones:
# - AMST: Amazon Summer Time (America)
-AMST Asia/Yerevan # Armenia Summer Time
- # (Asia/Yerevan)
+AMST Asia/Yerevan # Armenia Summer Time (obsolete)
# CONFLICT! AMT is not unique
# Other timezones:
# - AMT: Armenia Time (Asia)
-AMT -14400 # Amazon Time
- # (America/Boa_Vista)
- # (America/Campo_Grande)
- # (America/Cuiaba)
- # (America/Manaus)
- # (America/Porto_Velho)
+AMT -14400 # Amazon Time (obsolete)
ANAST Asia/Anadyr # Anadyr Summer Time (obsolete)
ANAT Asia/Anadyr # Anadyr Time (obsolete)
AZST Asia/Baku # Azerbaijan Summer Time (obsolete)
AZT Asia/Baku # Azerbaijan Time (obsolete)
-BDT 21600 # Bangladesh Time
- # (Asia/Dhaka)
-BNT 28800 # Brunei Darussalam Time
- # (Asia/Brunei)
+BDT 21600 # Bangladesh Time (obsolete)
+BNT 28800 # Brunei Darussalam Time (obsolete)
BORT 28800 # Borneo Time (Indonesia) (not in IANA database)
-BTT 21600 # Bhutan Time
- # (Asia/Thimphu)
+BTT 21600 # Bhutan Time (obsolete)
CCT 28800 # China Coastal Time (not in IANA database)
GEST Asia/Tbilisi # Georgia Summer Time (obsolete)
GET Asia/Tbilisi # Georgia Time (obsolete)
-HKT 28800 # Hong Kong Time (not in IANA database)
-ICT 25200 # Indochina Time
- # (Asia/Bangkok)
- # (Asia/Phnom_Penh)
- # (Asia/Saigon)
- # (Asia/Vientiane)
+HKT 28800 # Hong Kong Time
+ # (Asia/Hong_Kong)
+ICT 25200 # Indochina Time (obsolete)
IDT 10800 D # Israel Daylight Time
# (Asia/Jerusalem)
IRKST Asia/Irkutsk # Irkutsk Summer Time (obsolete)
LKT Asia/Colombo # Lanka Time (obsolete)
MAGST Asia/Magadan # Magadan Summer Time (obsolete)
MAGT Asia/Magadan # Magadan Time (obsolete)
-MMT 23400 # Myanmar Time
- # (Asia/Yangon)
-MYT 28800 # Malaysia Time
- # (Asia/Kuala_Lumpur)
- # (Asia/Kuching)
+MMT 23400 # Myanmar Time (obsolete)
+MYT 28800 # Malaysia Time (obsolete)
NOVST Asia/Novosibirsk # Novosibirsk Summer Time (obsolete)
NOVT Asia/Novosibirsk # Novosibirsk Time (obsolete)
-NPT 20700 # Nepal Time
- # (Asia/Katmandu)
+NPT 20700 # Nepal Time (obsolete)
OMSST Asia/Omsk # Omsk Summer Time (obsolete)
OMST Asia/Omsk # Omsk Time (obsolete)
PETST Asia/Kamchatka # Petropavlovsk-Kamchatski Summer Time (obsolete)
PETT Asia/Kamchatka # Petropavlovsk-Kamchatski Time (obsolete)
-PHT 28800 # Philippine Time
- # (Asia/Manila)
+PHT 28800 # Philippine Time (obsolete)
PKT 18000 # Pakistan Time
# (Asia/Karachi)
PKST 21600 D # Pakistan Summer Time
# (Asia/Karachi)
-SGT Asia/Singapore # Singapore Time
- # (Asia/Singapore)
+SGT Asia/Singapore # Singapore Time (obsolete)
TJT 18000 # Tajikistan Time (obsolete)
TMT Asia/Ashgabat # Turkmenistan Time (obsolete)
-ULAST 32400 D # Ulan Bator Summer Time
- # (Asia/Ulaanbaatar)
-ULAT Asia/Ulaanbaatar # Ulan Bator Time
- # (Asia/Ulaanbaatar)
-UZST 21600 D # Uzbekistan Summer Time
- # (Asia/Samarkand)
- # (Asia/Tashkent)
+ULAST 32400 D # Ulan Bator Summer Time (obsolete)
+ULAT Asia/Ulaanbaatar # Ulan Bator Time (obsolete)
+UZST 21600 D # Uzbekistan Summer Time (obsolete)
UZT 18000 # Uzbekistan Time (obsolete)
VLAST Asia/Vladivostok # Vladivostok Summer Time (obsolete)
VLAT Asia/Vladivostok # Vladivostok Time (obsolete)
-XJT 21600 # Xinjiang Time
- # (Asia/Urumqi)
+XJT 21600 # Xinjiang Time (obsolete)
YAKST Asia/Yakutsk # Yakutsk Summer Time (obsolete)
YAKT Asia/Yakutsk # Yakutsk Time (obsolete)
YEKST 21600 D # Yekaterinburg Summer Time (obsolete)
# (America/Thule)
# (America/Tortola)
# (Atlantic/Bermuda)
-AZOST 0 D # Azores Summer Time
- # (Atlantic/Azores)
-AZOT -3600 # Azores Time
- # (Atlantic/Azores)
-FKST Atlantic/Stanley # Falkland Islands Summer/Standard Time
- # (Atlantic/Stanley)
+AZOST 0 D # Azores Summer Time (obsolete)
+AZOT -3600 # Azores Time (obsolete)
+FKST Atlantic/Stanley # Falkland Islands Summer/Standard Time (obsolete)
FKT Atlantic/Stanley # Falkland Islands Time (obsolete)
#################### AUSTRALIA ####################
# (Australia/Adelaide)
# (Australia/Broken_Hill)
# (Australia/Darwin)
-ACWST 31500 # Australian Central Western Standard Time
- # (Australia/Eucla)
+ACWST 31500 # Australian Central Western Standard Time (obsolete)
AESST 39600 D # Australian Eastern Summer Standard Time (not in IANA database)
AEDT 39600 D # Australian Eastern Daylight Time
# (Australia/Brisbane)
# (Australia/Perth)
CADT 37800 D # Central Australia Daylight-Saving Time (not in IANA database)
CAST 34200 # Central Australia Standard Time (not in IANA database)
-LHDT Australia/Lord_Howe # Lord Howe Daylight Time
- # (Australia/Lord_Howe)
-LHST 37800 # Lord Howe Standard Time
- # (Australia/Lord_Howe)
+LHDT Australia/Lord_Howe # Lord Howe Daylight Time (obsolete)
+LHST 37800 # Lord Howe Standard Time (obsolete)
LIGT 36000 # Melbourne, Australia (not in IANA database)
NZT 43200 # New Zealand Time (not in IANA database)
SADT 37800 D # South Australian Daylight-Saving Time (not in IANA database)
FET 10800 # Further-eastern European Time (obsolete)
# (Europe/Kaliningrad)
# (Europe/Minsk)
-MEST 7200 D # Middle Europe Summer Time (not in IANA database)
-MET 3600 # Middle Europe Time (not in IANA database)
+MEST 7200 D # Middle Europe Summer Time
+ # (MET)
+MESZ 7200 D # Mitteleuropaeische Sommerzeit (German)
+ # (attested in IANA comments though not their code)
+MET 3600 # Middle Europe Time
+ # (MET)
METDST 7200 D # Middle Europe Summer Time (not in IANA database)
-MEZ 3600 # Mitteleuropaeische Zeit (German) (not in IANA database)
+MEZ 3600 # Mitteleuropaeische Zeit (German)
+ # (attested in IANA comments though not their code)
MSD 14400 D # Moscow Daylight Time (obsolete)
MSK Europe/Moscow # Moscow Time
# (Europe/Moscow)
#################### INDIAN ####################
-CXT 25200 # Christmas Island Time (Indian Ocean)
- # (Indian/Christmas)
-IOT Indian/Chagos # British Indian Ocean Territory (Chagos)
- # (Indian/Chagos)
-MUT 14400 # Mauritius Island Time
- # (Indian/Mauritius)
-MUST 18000 D # Mauritius Island Summer Time
- # (Indian/Mauritius)
-MVT 18000 # Maldives Island Time
- # (Indian/Maldives)
-RET 14400 # Reunion Time
- # (Indian/Reunion)
-SCT 14400 # Seychelles Time
- # (Indian/Mahe)
+CXT 25200 # Christmas Island Time (Indian Ocean) (obsolete)
+IOT Indian/Chagos # British Indian Ocean Territory (Chagos) (obsolete)
+MUT 14400 # Mauritius Island Time (obsolete)
+MUST 18000 D # Mauritius Island Summer Time (obsolete)
+MVT 18000 # Maldives Island Time (obsolete)
+RET 14400 # Reunion Time (obsolete)
+SCT 14400 # Seychelles Time (obsolete)
TFT 18000 # Kerguelen Time (obsolete)
#################### PACIFIC ####################
-CHADT 49500 D # Chatham Daylight Time (New Zealand)
- # (Pacific/Chatham)
-CHAST 45900 # Chatham Standard Time (New Zealand)
- # (Pacific/Chatham)
-CHUT 36000 # Chuuk Time
- # (Pacific/Chuuk)
-CKT Pacific/Rarotonga # Cook Islands Time
- # (Pacific/Rarotonga)
-EASST Pacific/Easter # Easter Island Summer Time
- # (Pacific/Easter)
-EAST Pacific/Easter # Easter Island Time (Chile)
- # (Pacific/Easter)
-FJST 46800 D # Fiji Summer Time
- # (Pacific/Fiji)
-FJT 43200 # Fiji Time
- # (Pacific/Fiji)
-GALT -21600 # Galapagos Time
- # (Pacific/Galapagos)
-GAMT -32400 # Gambier Time
- # (Pacific/Gambier)
-GILT 43200 # Gilbert Islands Time
- # (Pacific/Tarawa)
+CHADT 49500 D # Chatham Daylight Time (New Zealand) (obsolete)
+CHAST 45900 # Chatham Standard Time (New Zealand) (obsolete)
+CHUT 36000 # Chuuk Time (obsolete)
+CKT Pacific/Rarotonga # Cook Islands Time (obsolete)
+EASST Pacific/Easter # Easter Island Summer Time (obsolete)
+EAST Pacific/Easter # Easter Island Time (Chile) (obsolete)
+FJST 46800 D # Fiji Summer Time (obsolete)
+FJT 43200 # Fiji Time (obsolete)
+GALT -21600 # Galapagos Time (obsolete)
+GAMT -32400 # Gambier Time (obsolete)
+GILT 43200 # Gilbert Islands Time (obsolete)
HST -36000 # Hawaiian Standard Time
# (Pacific/Honolulu)
# (Pacific/Johnston)
-KOST Pacific/Kosrae # Kosrae Time
- # (Pacific/Kosrae)
-LINT Pacific/Kiritimati # Line Islands Time (Kiribati)
- # (Pacific/Kiritimati)
-MART -34200 # Marquesas Time
- # (Pacific/Marquesas)
-MHT 43200 # Kwajalein Time
- # (Pacific/Kwajalein)
- # (Pacific/Majuro)
+KOST Pacific/Kosrae # Kosrae Time (obsolete)
+LINT Pacific/Kiritimati # Line Islands Time (Kiribati) (obsolete)
+MART -34200 # Marquesas Time (obsolete)
+MHT 43200 # Kwajalein Time (obsolete)
MPT 36000 # North Mariana Islands Time (not in IANA database)
-# CONFLICT! NFT is not unique
-# Other timezones:
-# - NFT: Norfolk Time (Pacific)
-NFT -12600 # Newfoundland Time (not in IANA database)
-NUT Pacific/Niue # Niue Time
- # (Pacific/Niue)
+NUT Pacific/Niue # Niue Time (obsolete)
NZDT 46800 D # New Zealand Daylight Time
# (Antarctica/McMurdo)
# (Pacific/Auckland)
NZST 43200 # New Zealand Standard Time
# (Antarctica/McMurdo)
# (Pacific/Auckland)
-PGT 36000 # Papua New Guinea Time
- # (Pacific/Port_Moresby)
-PHOT Pacific/Enderbury # Phoenix Islands Time (Kiribati)
- # (Pacific/Enderbury)
-PONT 39600 # Ponape Time (Micronesia)
- # (Pacific/Ponape)
-PWT 32400 # Palau Time
- # (Pacific/Palau)
-TAHT -36000 # Tahiti Time (IANA database says "TAHT", other sources "THAT")
- # (Pacific/Tahiti)
-TKT Pacific/Fakaofo # Tokelau Time
- # (Pacific/Fakaofo)
+PGT 36000 # Papua New Guinea Time (obsolete)
+PHOT Pacific/Enderbury # Phoenix Islands Time (Kiribati) (obsolete)
+PONT 39600 # Ponape Time (Micronesia) (obsolete)
+PWT 32400 # Palau Time (obsolete)
+TAHT -36000 # Tahiti Time (obsolete)
+TKT Pacific/Fakaofo # Tokelau Time (obsolete)
TOT 46800 # Tonga Time (obsolete)
-TRUT 36000 # Truk Time (IANA database used to say "TRUT", other sources say "TRUK")
- # (Pacific/Truk)
-TVT 43200 # Tuvalu Time
- # (Pacific/Funafuti)
-VUT 39600 # Vanuata Time
- # (Pacific/Efate)
-WAKT 43200 # Wake Time
- # (Pacific/Wake)
-WFT 43200 # Wallis and Futuna Time
- # (Pacific/Wallis)
+TRUT 36000 # Truk Time (obsolete)
+TVT 43200 # Tuvalu Time (obsolete)
+VUT 39600 # Vanuata Time (obsolete)
+WAKT 43200 # Wake Time (obsolete)
+WFT 43200 # Wallis and Futuna Time (obsolete)
YAPT 36000 # Yap Time (Micronesia) (not in IANA database)
# - IST: Israel Standard Time (Asia)
IST 3600 D # Irish Summer Time
# (Europe/Dublin)
-MEST 7200 D # Middle Europe Summer Time (not in IANA database)
-MET 3600 # Middle Europe Time (not in IANA database)
+MEST 7200 D # Middle Europe Summer Time
+ # (MET)
+MESZ 7200 D # Mitteleuropäische Sommerzeit (German)
+ # (attested in IANA comments though not their code)
+MET 3600 # Middle Europe Time
+ # (MET)
METDST 7200 D # Middle Europe Summer Time (not in IANA database)
-MEZ 3600 # Mitteleuropäische Zeit (German) (not in IANA database)
+MEZ 3600 # Mitteleuropäische Zeit (German)
+ # (attested in IANA comments though not their code)
MSD 14400 D # Moscow Daylight Time (obsolete)
MSK Europe/Moscow # Moscow Time
# (Europe/Moscow)
# src/timezone/tznames/Indian.txt
#
-CCT 23400 # Cocos Islands Time (Indian Ocean)
- # (Indian/Cocos)
-CXT 25200 # Christmas Island Time (Indian Ocean)
- # (Indian/Christmas)
+CCT 23400 # Cocos Islands Time (Indian Ocean) (obsolete)
+CXT 25200 # Christmas Island Time (Indian Ocean) (obsolete)
EAT 10800 # East Africa Time
# (Africa/Addis_Ababa)
# (Africa/Asmera)
# (Indian/Antananarivo)
# (Indian/Comoro)
# (Indian/Mayotte)
-IOT Indian/Chagos # British Indian Ocean Territory (Chagos)
- # (Indian/Chagos)
-MUT 14400 # Mauritius Island Time
- # (Indian/Mauritius)
-MUST 18000 D # Mauritius Island Summer Time
- # (Indian/Mauritius)
-MVT 18000 # Maldives Island Time
- # (Indian/Maldives)
-RET 14400 # Reunion Time
- # (Indian/Reunion)
-SCT 14400 # Seychelles Time
- # (Indian/Mahe)
+IOT Indian/Chagos # British Indian Ocean Territory (Chagos) (obsolete)
+MUT 14400 # Mauritius Island Time (obsolete)
+MUST 18000 D # Mauritius Island Summer Time (obsolete)
+MVT 18000 # Maldives Island Time (obsolete)
+RET 14400 # Reunion Time (obsolete)
+SCT 14400 # Seychelles Time (obsolete)
TFT 18000 # Kerguelen Time (obsolete)
# CONFLICT! BST is not unique
# Other timezones:
# - BST: British Summer Time
-BST 39600 # Bougainville Standard Time (Papua New Guinea)
- # (Pacific/Bougainville)
-CHADT 49500 D # Chatham Daylight Time (New Zealand)
- # (Pacific/Chatham)
-CHAST 45900 # Chatham Standard Time (New Zealand)
- # (Pacific/Chatham)
+BST 39600 # Bougainville Standard Time (Papua New Guinea) (obsolete)
+CHADT 49500 D # Chatham Daylight Time (New Zealand) (obsolete)
+CHAST 45900 # Chatham Standard Time (New Zealand) (obsolete)
ChST 36000 # Chamorro Standard Time (lower case "h" is as in IANA database)
# (Pacific/Guam)
# (Pacific/Saipan)
-CHUT 36000 # Chuuk Time
- # (Pacific/Chuuk)
-CKT Pacific/Rarotonga # Cook Islands Time
- # (Pacific/Rarotonga)
-EASST Pacific/Easter # Easter Island Summer Time
- # (Pacific/Easter)
+CHUT 36000 # Chuuk Time (obsolete)
+CKT Pacific/Rarotonga # Cook Islands Time (obsolete)
+EASST Pacific/Easter # Easter Island Summer Time (obsolete)
# CONFLICT! EAST is not unique
# Other timezones:
# - EAST: East Australian Standard Time (Australia)
-EAST Pacific/Easter # Easter Island Time (Chile)
- # (Pacific/Easter)
-FJST 46800 D # Fiji Summer Time (caution: this used to mean -46800)
- # (Pacific/Fiji)
-FJT 43200 # Fiji Time (caution: this used to mean -43200)
- # (Pacific/Fiji)
-GALT -21600 # Galapagos Time
- # (Pacific/Galapagos)
-GAMT -32400 # Gambier Time
- # (Pacific/Gambier)
-GILT 43200 # Gilbert Islands Time
- # (Pacific/Tarawa)
+EAST Pacific/Easter # Easter Island Time (Chile) (obsolete)
+FJST 46800 D # Fiji Summer Time (caution: this used to mean -46800) (obsolete)
+FJT 43200 # Fiji Time (caution: this used to mean -43200) (obsolete)
+GALT -21600 # Galapagos Time (obsolete)
+GAMT -32400 # Gambier Time (obsolete)
+GILT 43200 # Gilbert Islands Time (obsolete)
HST -36000 # Hawaiian Standard Time
# (Pacific/Honolulu)
# (Pacific/Johnston)
-KOST Pacific/Kosrae # Kosrae Time
- # (Pacific/Kosrae)
-LINT Pacific/Kiritimati # Line Islands Time (Kiribati)
- # (Pacific/Kiritimati)
-MART -34200 # Marquesas Time
- # (Pacific/Marquesas)
-MHT 43200 # Kwajalein Time
- # (Pacific/Kwajalein)
- # (Pacific/Majuro)
+KOST Pacific/Kosrae # Kosrae Time (obsolete)
+LINT Pacific/Kiritimati # Line Islands Time (Kiribati) (obsolete)
+MART -34200 # Marquesas Time (obsolete)
+MHT 43200 # Kwajalein Time (obsolete)
MPT 36000 # North Mariana Islands Time (not in IANA database)
-NCT 39600 # New Caledonia Time
- # (Pacific/Noumea)
+NCT 39600 # New Caledonia Time (obsolete)
# CONFLICT! NFT is not unique
# Other timezones:
# - NFT: Newfoundland Time (America)
-NFT Pacific/Norfolk # Norfolk Time
- # (Pacific/Norfolk)
-NRT Pacific/Nauru # Nauru Time
- # (Pacific/Nauru)
-NUT Pacific/Niue # Niue Time
- # (Pacific/Niue)
+NFT Pacific/Norfolk # Norfolk Time (obsolete)
+NRT Pacific/Nauru # Nauru Time (obsolete)
+NUT Pacific/Niue # Niue Time (obsolete)
NZDT 46800 D # New Zealand Daylight Time
# (Antarctica/McMurdo)
# (Pacific/Auckland)
NZST 43200 # New Zealand Standard Time
# (Antarctica/McMurdo)
# (Pacific/Auckland)
-PGT 36000 # Papua New Guinea Time
- # (Pacific/Port_Moresby)
-PHOT Pacific/Enderbury # Phoenix Islands Time (Kiribati)
- # (Pacific/Enderbury)
-PONT 39600 # Ponape Time (Micronesia)
- # (Pacific/Ponape)
+PGT 36000 # Papua New Guinea Time (obsolete)
+PHOT Pacific/Enderbury # Phoenix Islands Time (Kiribati) (obsolete)
+PONT 39600 # Ponape Time (Micronesia) (obsolete)
PST -28800 # Pacific Standard Time
# (America/Dawson)
# (America/Los_Angeles)
# (America/Vancouver)
# (America/Whitehorse)
# (Pacific/Pitcairn)
-PWT 32400 # Palau Time
- # (Pacific/Palau)
-SBT 39600 # Solomon Islands Time
- # (Pacific/Guadalcanal)
+PWT 32400 # Palau Time (obsolete)
+SBT 39600 # Solomon Islands Time (obsolete)
SST -39600 # South Sumatran Time
# (Pacific/Midway)
# (Pacific/Pago_Pago)
-TAHT -36000 # Tahiti Time (IANA database says "TAHT", other sources "THAT")
- # (Pacific/Tahiti)
-TKT Pacific/Fakaofo # Tokelau Time
- # (Pacific/Fakaofo)
+TAHT -36000 # Tahiti Time (obsolete)
+TKT Pacific/Fakaofo # Tokelau Time (obsolete)
TOT 46800 # Tonga Time (obsolete)
-TRUT 36000 # Truk Time (IANA database used to say "TRUT", other sources say "TRUK")
- # (Pacific/Truk)
-TVT 43200 # Tuvalu Time
- # (Pacific/Funafuti)
-VUT 39600 # Vanuata Time
- # (Pacific/Efate)
-WAKT 43200 # Wake Time
- # (Pacific/Wake)
-WFT 43200 # Wallis and Futuna Time
- # (Pacific/Wallis)
-WSDT 50400 D # West Samoa Daylight Time
- # (Pacific/Apia)
-WSST 46800 # West Samoa Standard Time
- # (Pacific/Apia)
+TRUT 36000 # Truk Time (obsolete)
+TVT 43200 # Tuvalu Time (obsolete)
+VUT 39600 # Vanuata Time (obsolete)
+WAKT 43200 # Wake Time (obsolete)
+WFT 43200 # Wallis and Futuna Time (obsolete)
+WSDT 50400 D # West Samoa Daylight Time (obsolete)
+WSST 46800 # West Samoa Standard Time (obsolete)
# CONFLICT! WST is not unique
# Other timezones:
# - WST: Western Standard Time (Australia)
The files named Africa.txt, etc, are not intended to be used directly as
time zone abbreviation files. They contain reference definitions of time zone
abbreviations that can be copied into a custom abbreviation file as needed.
-Note that these files (*.txt) are already a subset of the IANA timezone
-database files: we tried to list only those time zone abbreviations that
-(according to the IANA timezone database) appear to be still in use.
+These files contain most of the time zone abbreviations that were shown
+in the IANA timezone database circa 2010.
+
+However, it turns out that many of these abbreviations had simply been
+invented by the IANA timezone group, and do not have currency in real-world
+use. The IANA group have changed their policy about that, and now prefer to
+use numeric UTC offsets whenever there's not an abbreviation with known
+real-world popularity. A lot of these abbreviations therefore no longer
+appear in the IANA data, and so are marked "obsolete" in these data files.
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