-# @(#)africa 7.7
+# @(#)africa 7.12
# This data is by no means authoritative; if you think you know better,
# go ahead and edit the file (and please send any changes to
# E.g. prefer `Brunei' to `Bandar_Seri_Begawan'.
# Include at least one location per time zone rule set per country.
# One such location is enough.
+# If all the clocks in a country's region have agreed since 1970,
+# don't bother to include more than one location
+# even if subregions' clocks disagreed before 1970.
+# Otherwise these tables would become annoyingly large.
# If a name is ambiguous, use a less ambiguous alternative;
# e.g. many cities are named San Jose and Georgetown, so
# prefer `Costa_Rica' to `San_Jose' and `Guyana' to `Georgetown'.
0:52 - LMT 1911 May 26 # Luanda Mean Time
1:00 - CAT
+# Bassas da India
+# uninhabited
+
# Benin
# Whitman says they switched to 1:00 in 1946, not 1934; go with Shanks.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2:35 - AAMT 1936 May 5 # Addis Ababa MT
3:00 - EAT
+# Europa Island
+# uninhabited
+
# Gabon
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Africa/Libreville 0:37:48 - LMT 1912
Zone Africa/Accra -0:00:52 - LMT 1918
0:00 Ghana %s
+# Glorioso Is
+# uninhabited
+
# Guinea
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Africa/Conakry -0:54:52 - LMT 1912
1:00 - CAT 1975
0:00 - WAT
+# Juan de Nova
+# uninhabited
+
# Kenya
# From Paul Eggert <eggert@twinsun.com> (November 18, 1993):
# Shanks says the transition to 2:45 was in 1940, but it must have been 1948.
Rule Libya 1987 1989 - Apr 1 0:00 1:00 " DST"
Rule Libya 1987 1990 - Oct 1 0:00 0 -
Rule Libya 1990 only - May 4 0:00 1:00 " DST"
-# From Paul Eggert <eggert@twinsun.com> (November 18, 1993):
-# Here's a guess for years starting with 1991.
-Rule Libya 1991 max - Apr 1 0:00 1:00 " DST"
-Rule Libya 1991 max - Oct 1 0:00 0 -
-
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Africa/Tripoli 0:52:44 - LMT 1920
1:00 Libya MET%s 1959
2:00 - EET 1982
- 1:00 Libya MET%s
+# From Paul Eggert <eggert@twinsun.com> (1995-12-19):
+# usno1995 (from OAG) says Libya uses 2:00 all year, as they did before 1982.
+# We don't know when they switched back. We'll guess 1991.
+ 1:00 Libya MET%s 1991
+ 2:00 - EET
# Madagascar
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
# Mayotte
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Indian/Mayotte 3:01:08 - LMT 1911 Jul # Dzaoudzi
+Zone Indian/Mayotte 3:00:56 - LMT 1911 Jul # Mamoutzou
3:00 - EAT
# Morocco
1:00 - MET 1986
0:00 - WET
# The following are controlled by Spain, and are like Europe/Madrid:
-# Alboran, Alhucemas Is, Ceuta, Chafarinas Is, Mellila.
+# Alboran, Alhucemas Is, Ceuta, Chafarinas Is, Melilla.
# Mozambique
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
# Reunion
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Indian/Reunion 3:41:52 - LMT 1911 Jun # St Denis
+Zone Indian/Reunion 3:41:52 - LMT 1911 Jun # Saint-Denis
4:00 - SMT
# Rwanda
Zone Atlantic/St_Helena -0:22:48 - LMT 1890 # Jamestown
-0:06 - ?MT 1951 # a typo in Shanks?
0:00 - GMT
-# Whitman says Tristan da Cunha is on GMT, like Atlantic/St_Helena.
-#
-# Ascension, Gough, Inaccessible, Nightingale
-# no information; probably like Atlantic/St_Helena
+# The other parts of the St Helena territory are similar:
+# Tristan da Cunha: on GMT, says Whitman
+# Ascension: on GMT, says usno1995
+# Gough, Inaccessible, Nightingale: no information, but probably GMT
# Sao Tome and Principe
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
# no information
# Sudan
+# From Michael Ross <mross@antigone.com> (November 15, 1995):
+# Sudan no longer observes any form of daylight time change.
+# I verified this today by telephone with the Sudan Mission to the
+# United Nations: 212-573-6033
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Sudan 1931 only - Feb 8 0:00 0 -
Rule Sudan 1970 only - May 1 0:00 1:00 " DST"
-Rule Sudan 1970 max - Oct 15 0:00 0 -
+Rule Sudan 1970 1985 - Oct 15 0:00 0 -
Rule Sudan 1971 only - Apr 30 0:00 1:00 " DST"
-Rule Sudan 1972 max - Apr lastSun 0:00 1:00 " DST"
+Rule Sudan 1972 1985 - Apr lastSun 0:00 1:00 " DST"
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Africa/Khartoum 2:10:08 - LMT 1931
2:00 Sudan EET%s
Zone Africa/Lome 0:04:52 - LMT 1893
0:00 - WAT
+# Tromelin
+# uninhabited
+
# Tunisia
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Tunisia 1911 only - Mar 9 0:00 0 -
-# @(#)antarctica 7.2
+# @(#)antarctica 7.3
# From Arthur David Olson (February 13, 1988):
# No data available.
# South Orkney Is
# South Shetland Is
-# Amsterdam Island
# Bouvet
-# Crozet Is
-# Heard and McDonald Is
-# Kerguelen Is
-# St Paul Island
+# uninhabited
+
+# French Southern and Antarctic Lands (no indigenous inhabitants) include
+# Amsterdam Island
+# Crozet Is
+# Kerguelen Is
+# St Paul Island
+
+# Heard Island, McDonald Is
+# uninhabited
+
# Peter I Island
# Scott Island
-# @(#)asia 7.14
+# @(#)asia 7.17
# This data is by no means authoritative; if you think you know better,
# go ahead and edit the file (and please send any changes to
# tz@elsie.nci.nih.gov for general use in the future).
-# From Paul Eggert <eggert@twinsun.com> (August 18, 1994):
+# From Paul Eggert <eggert@twinsun.com> (1995-12-19):
#
# A good source for time zone historical data outside the U.S. is
# Thomas G. Shanks, The International Atlas (3rd edition),
# 2:00 EET EET DST Eastern European Time
# 2:00 IST IDT Israel
# 3:00 AST ADT Arabia*
-# 3:00 MSK MSD Moscow
+# 3:00 BSK BSD Baku (was 4:00)*
# 3:30 IST IDT Iran
-# 4:00 BSK BSD Baku*
+# 4:00 TBSK TBSD Tbilisi (was 3:00)*
+# 4:00 YSK YSD Yerevan (was 3:00)*
# 4:00 GST GDT Gulf*
# 4:30 AFT Afghanistan*
-# 5:00 ASK ASD Ashkhabad*
+# 5:00 ASK ASD Ashkhabad (was 4:00)*
+# 5:00 BSK BSD Bishkek (was 6:00) (was FSK, FSD)*
# 5:00 PKT Pakistan*
+# 5:00 TSK TSD Tashkent (was 6:00)*
# 5:30 IST IST India
# 5:45 NPT Nepal*
+# 6:00 AASK AASD Alma-Ata (was 5:00)*
# 6:00 BGT Bengal, Bangladesh*
-# 6:00 TSK TSD Tashkent*
+# 6:00 DSK DSD Dushanbe (was 5:00)*
# 6:30 BMT Burma*
# 7:00 ICT Indochina*
# 7:00 JVT Java*
###############################################################################
-# From Paul Eggert <eggert@twinsun.com> (May 28, 1994):
-# We don't know what happened to the clocks in the Caucausus and the ex-Soviet
-# Central Asia after 1990. Until we get more info, stick with the pre-1991 rules.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Russia 1981 1984 - Apr 1 0:00 1:00 D
Rule Russia 1981 1983 - Oct 1 0:00 0 K
-Rule Russia 1984 max - Sep lastSun 3:00 0 K
-Rule Russia 1985 max - Mar lastSun 2:00 1:00 D
+Rule Russia 1984 max - Sep lastSun 2:00s 0 K
+Rule Russia 1985 max - Mar lastSun 2:00s 1:00 D
# Afghanistan
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
# Armenia
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Yerevan 2:58:00 - LMT 1924 May 2
- 3:00 - MSK 1957 Mar
- 4:00 Russia BS%s
+ 3:00 - YSK 1957 Mar
+ 4:00 Russia YS%s
+# Shanks has Yerevan switching to 3:00 (with Russian DST) in spring 1991,
+# but usno1995 has Armenia at 4:00 (with DST). Ignore the 1991 switch for now.
# Azerbaijan
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Baku 3:19:24 - LMT 1924 May 2
- 3:00 - MSK 1957 Mar
- 4:00 Russia BS%s
+ 3:00 - BSK 1957 Mar
+ 4:00 Russia BS%s 1991 Mar 31 2:00s
+ 3:00 1:00 BSD 1991 Sep 29 2:00s
+ 3:00 - BSK
+# Shanks has Baku using Russian DST rules after 1991,
+# but usno1995 has Azerbaijan with no DST. Go with usno1995.
# Bahrain
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
7:30 - BNT 1933
8:00 - BNT
-# Burma
+# Burma / Myanmar
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Rangoon 6:24:40 - LMT 1880
6:25 - RMT 1920
# 1986 May 4 - Sept 14
# 1987 mid-April - ??
-# From Paul Eggert <eggert@twinsun.com> (November 18, 1993):
-# According to Shanks, China started using DST in 1986,
-# but it's still all one big happy time zone.
-
# From U. S. Naval Observatory (January 19, 1989):
# CHINA 8 H AHEAD OF UTC ALL OF CHINA, INCL TAIWAN
# CHINA 9 H AHEAD OF UTC APR 17 - SEP 10
-# From Paul Eggert <eggert@twinsun.com> (November 18, 1993):
+# From Paul Eggert <eggert@twinsun.com> (1995-12-19):
# Shanks writes that China switched from the Chinese calendar on 1912 Feb 12.
# He also writes that China has had a single time zone since 1980 May 1,
-# and that they instituted DST on 1986 May 4; this contradicts Devine's
+# observing summer DST from 1986 through 1991; this contradicts Devine's
# note about Time magazine, though apparently _something_ happened in 1986.
+# Go with Shanks for now. I made up names for the other pre-1980 time zones.
# From Shanks (1991):
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Shang 1941 only - Mar 16 0:00 1:00 D
Rule PRC 1949 only - Jan 1 0:00 0 S
Rule PRC 1986 only - May 4 0:00 1:00 D
-Rule PRC 1986 max - Sep Sun>=11 0:00 0 S
-Rule PRC 1987 max - Apr Sun>=10 0:00 1:00 D
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Rule PRC 1986 1991 - Sep Sun>=11 0:00 0 S
+Rule PRC 1987 1991 - Apr Sun>=10 0:00 1:00 D
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone Asia/Harbin 8:26:44 - LMT 1928
+ 8:30 - MAT 1932 Mar # Manchuria
+ 8:00 - CST 1940
+ 9:00 - KST 1966 May
+ 8:30 - MAT 1980 May
+ 8:00 PRC C%sT
Zone Asia/Shanghai 8:05:52 - LMT 1928
8:00 Shang C%sT 1949
8:00 PRC C%sT
+Zone Asia/Chungking 7:06:20 - LMT 1928
+ 7:00 - ICT 1980 May
+ 8:00 PRC C%sT
+Zone Asia/Urumqi 5:50:20 - LMT 1928
+ 6:00 - URT 1980 May # Urumqi
+ 8:00 PRC C%sT
+Zone Asia/Kashgar 5:03:56 - LMT 1928
+ 5:30 - ETT 1940 # Eastern Turkestan
+ 5:00 - ETT 1980 May
+ 8:00 PRC C%sT
###############################################################################
###############################################################################
# Hong Kong
-# Presumably Hong Kong will have DST again when it merges with China,
-# but it's too early to predict the details.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule HK 1904 only - Oct 30 0:00 0 -
Rule HK 1946 only - Apr 20 3:30 1:00 S
8:00 HK HK%sT
# Macao
-# Presumably Macao will have DST again when it merges with China,
-# but it's too early to predict the details.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Macao 1912 only - Jan 1 0:00 0 S
Rule Macao 1961 1962 - Mar Sun>=16 3:30 1:00 D
# Today's _Economist_ (p 60) reports that Georgia moved its clocks forward
# an hour recently, due to a law proposed by Zurab Murvanidze,
# an MP who went on a hunger strike for 11 days to force discussion about it!
-# Alas, we have no details.
+# We have no details, but we'll guess they didn't move the clocks back in fall.
+#
+# From Paul Eggert (1995-11-13):
+# usno1995 has Georgia at 4:00. Guess that Georgia stopped transitions
+# after spring 1994 (thus sticking at 4:00).
+# Most likely we're still missing some rule changes between 1991 and 1994.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Tbilisi 2:59:16 - LMT 1880
2:59 - LST 1924 May 2
- 3:00 - MSK 1957 Mar
- 4:00 Russia BS%s
+ 3:00 - TBSK 1957 Mar
+ 4:00 Russia TBS%s 1991 Mar 31 2:00s
+ 3:00 1:00 TBSD 1991 Sep 29 2:00s
+ 3:00 Russia TBS%s 1994 Sep 25 2:00s
+ 4:00 - TBSK
# India
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
9:00 - MLT
# Iran
-
-# Shanks has no record of DST after 1980.
-
-# From Bob Devine (January 28, 1988):
-# Iran: Last Sunday in March to third (?) Sunday in
-# September. Since the revolution, the official calendar is Monarchic
-# calendar; I have no idea what the correspondence between dates are.
-
-# From U. S. Naval Observatory (January 19, 1989):
-# IRAN 3.5H AHEAD OF UTC
-
-# From Shanks (1991), with corrections from Devine:
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Iran 1977 only - Nov 1 0:00 0 S
Rule Iran 1978 1980 - Mar 21 0:00 1:00 D
Rule Iran 1978 only - Oct 21 0:00 0 S
Rule Iran 1979 only - Sep 19 0:00 0 S
Rule Iran 1980 only - Sep 23 0:00 0 S
-Rule Iran 1988 max - Mar lastSun 2:00 1:00 D
-Rule Iran 1988 max - Sep Sun>=15 2:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Tehran 3:25:44 - LMT 1916
3:26 - TMT 1946
#Rule Zion 1991 only - Mar 10 0:00 1:00 D
#Rule Zion 1991 only - Sep 1 0:00 0 S
-# From Ephraim Silverberg (September 20, 1995):
+# From Ephraim Silverberg (1996-01-02):
#
# According to the Office of the Secretary General of the Ministry of
# Interior, there is NO set rule for Daylight-Savings/Standard time changes.
# time annually. Ever since 1993, the change to daylight savings time has
# been from midnight Thursday night to 1 a.m. Friday morning and the change
# back to standard time on Saturday night from midnight daylight savings time
-# to 11 p.m. standard time.
+# to 11 p.m. standard time. 1996 is an exception to this rule where the
+# change back to standard time takes place on Sunday night instead of Saturday
+# night to avoid conflicts with the Jewish New Year.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Zion 1989 only - Apr 30 0:00 1:00 D
#
# ftp://ftp.huji.ac.il/pub/misc/timezones/announcements/1996-1998.ps.gz
#
-# Emptor Caveat: The fall of 1996 is an election year (the change to/from
-# daylight savings time affects the earliest possible time for morning prayers
-# making it is a sensitive issue among the religious sector of the electorate)
-# so political considerations may cause the outgoing government to make the
-# change back to standard time earlier in the fall of 1996 and the incoming
-# government may nullify the 1997/1998 times altogether depending on the
-# coalition formed after the elections. Life isn't boring here in Israel.
+# Emptor Caveat: The dates for the years 1996-1998 were originally announced
+# on August 31, 1995, by the previous Minister of Interior. The new Minister
+# of Interior changed the dates on January 1, 1996, to take into account the
+# desires of certain portions of Israeli society (the next election is in the
+# Fall of 1996). After this (1996) year's Daylight Savings Time is over, the
+# new minister has announced that a study will be conducted as to the wishes of
+# the populace regarding the length of Daylight Savings Time and the Interior
+# Committee will meet to review the results of the study and make any necessary
+# changes to the 1997-1998 dates. Never a dull moment in the State of Israel.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Zion 1996 1998 - Mar Fri>=14 0:00 1:00 D
-Rule Zion 1996 only - Sep 22 0:00 0:00 S
-Rule Zion 1997 only - Nov 2 0:00 0:00 S
-Rule Zion 1998 only - Oct 25 0:00 0:00 S
+Rule Zion 1996 only - Sep 16 0:00 0:00 S
+Rule Zion 1997 1998 - Oct Sun>=14 0:00 0:00 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Tel_Aviv 2:19:04 - LMT 1880
# 9:00 Japan J%sT
# and uncomment the two `Rule' lines commented out above.
-# From Paul Eggert <eggert@twinsun.com> (November 18, 1993):
+# From Paul Eggert <eggert@twinsun.com> (1995-12-19):
# Shanks says that the far southern Ryukyu Is (Nansei-Shoto) are 8:00,
-# but we don't have a good location name for them;
-# we don't even know the name of the principal town.
+# but we haven't confirmed this.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-#Zone Asia/South_Ryukyu 8:14:44 - LMT 1896 # Amitori
+#Zone Asia/Ishigaki 8:16:36 - LMT 1896
# 8:00 - CST
# There is no information for Marcus.
# Other Japanese possessions are probably like Asia/Tokyo.
# From Shanks (1991):
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Alma-Ata 5:07:48 - LMT 1924 May 2
- 5:00 - TSK 1957 Mar
- 6:00 Russia TS%s
+ 5:00 - AASK 1957 Mar
+ 6:00 Russia AAS%s
+# Shanks has Alma-Ata switching to 5:00 in 1991,
+# but usno1995 has Kazakhstan at 6:00. Ignore the 1991 switch for now.
# Kirgizstan
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Bishkek 4:58:24 - LMT 1924 May 2
- 5:00 - TSK 1957 Mar
- 6:00 Russia TS%s
+ 5:00 - FSK 1957 Mar # Frunze
+ 6:00 Russia FS%s 1991 Mar 31 2:00s
+ 5:00 1:00 FSD 1991 Sep 29 2:00s
+ 5:00 Russia BS%s
###############################################################################
2:00 Zion I%sT
# This will undoubtedly change soon.
+# Paracel Is
+# no information
+
# Philippines
# Howse writes (p 162) that until 1844 the Philippines kept American date.
# The rest of this data is from Shanks.
7:30 - SGT 1982 May
8:00 - SGT
+# Spratly Is
+# no information
+
# Sri Lanka
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Colombo 5:19:24 - LMT 1880
# Tajikistan
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Dushanbe 4:35:12 - LMT 1924 May 2
- 5:00 - TSK 1957 Mar
- 6:00 Russia TS%s
+ 5:00 - DSK 1957 Mar
+ 6:00 Russia DS%s 1991
+ 6:00 - DSK
+# Shanks has Dushanbe at 5:00 (6:00 summer) after 1991 Sep 29 3:00,
+# but usno1995 has it at 6:00. Go with usno1995.
# Thailand
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Ashkhabad 3:53:32 - LMT 1924 May 2
4:00 - ASK 1957 Mar
- 5:00 Russia AS%s
+ 5:00 Russia AS%s 1991
+ 5:00 - ASK
+# Shanks has Ashkhabad at 4:00 (5:00 summer) after 1991 Sep 20 3:00,
+# but usno has it at 5:00. Go with usno1995.
# United Arab Emirates
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Tashkent 4:37:12 - LMT 1924 May 2
5:00 - TSK 1957 Mar
- 6:00 Russia TS%s
+ 6:00 Russia TS%s 1991 Mar 31 2:00s
+ 5:00 1:00 TSD 1991 Sep 29 2:00s
+ 5:00 - TSK
+# Shanks has Tashkent using DST after 1991, but usno1995 says they don't.
+# Go with usno1995.
# Vietnam
# From Paul Eggert <eggert@twinsun.com> (November 18, 1993):
-# @(#)australasia 7.22
+# @(#)australasia 7.24
# This file also includes Pacific islands.
# Notes are at the end of this file
# Western Australia
Zone Australia/Perth 7:43:24 - LMT 1895 Dec
8:00 - WST 1917 Jan 1 0:01
- 8:00 Aus WST 1974 Oct lastSun 2:00
- 8:00 1:00 WST 1975 Mar Sun>=1 3:00
- 8:00 - WST 1983 Oct lastSun 2:00
- 8:00 1:00 WST 1984 Mar Sun>=1 3:00
- 8:00 - WST 1991 Nov 17 2:00
- 8:00 1:00 WST 1992 Mar Sun>=1 3:00
+ 8:00 Aus WST 1974 Oct lastSun 2:00s
+ 8:00 1:00 WST 1975 Mar Sun>=1 2:00s
+ 8:00 - WST 1983 Oct lastSun 2:00s
+ 8:00 1:00 WST 1984 Mar Sun>=1 2:00s
+ 8:00 - WST 1991 Nov 17 2:00s
+ 8:00 1:00 WST 1992 Mar Sun>=1 2:00s
8:00 - WST
# Queensland
Zone Australia/Brisbane 10:12:08 - LMT 1895
10:00 - EST 1917 Jan 1 0:01
- 10:00 Aus EST 1971 Oct lastSun 2:00
- 10:00 1:00 EST 1972 Feb lastSun 3:00
- 10:00 - EST 1989 Oct lastSun 2:00
- 10:00 1:00 EST 1990 Mar Sun>=1 3:00
- 10:00 - EST 1990 Oct lastSun 2:00
- 10:00 1:00 EST 1991 Mar Sun>=1 3:00
- 10:00 - EST 1991 Oct lastSun 2:00
- 10:00 1:00 EST 1992 Mar Sun>=1 3:00
+ 10:00 Aus EST 1971 Oct lastSun 2:00s
+ 10:00 1:00 EST 1972 Feb lastSun 2:00s
+ 10:00 - EST 1989 Oct lastSun 2:00s
+ 10:00 1:00 EST 1990 Mar Sun>=1 2:00s
+ 10:00 - EST 1990 Oct lastSun 2:00s
+ 10:00 1:00 EST 1991 Mar Sun>=1 2:00s
+ 10:00 - EST 1991 Oct lastSun 2:00s
+ 10:00 1:00 EST 1992 Mar Sun>=1 2:00s
10:00 - EST
# South Australia
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule AS 1971 1985 - Oct lastSun 2:00 1:00 -
-Rule AS 1986 only - Oct 19 2:00 1:00 -
-Rule AS 1987 max - Oct lastSun 2:00 1:00 -
-Rule AS 1972 only - Feb 27 3:00 0 -
-Rule AS 1973 1985 - Mar Sun>=1 3:00 0 -
-Rule AS 1986 1989 - Mar Sun>=15 3:00 0 -
-Rule AS 1990 1994 even Mar Sun>=18 3:00 0 -
-Rule AS 1990 1994 odd Mar Sun>=1 3:00 0 -
-Rule AS 1995 max - Mar lastSun 3:00 0 -
+Rule AS 1971 1985 - Oct lastSun 2:00s 1:00 -
+Rule AS 1986 only - Oct 19 2:00s 1:00 -
+Rule AS 1987 max - Oct lastSun 2:00s 1:00 -
+Rule AS 1972 only - Feb 27 2:00s 0 -
+Rule AS 1973 1985 - Mar Sun>=1 2:00s 0 -
+Rule AS 1986 1989 - Mar Sun>=15 2:00s 0 -
+Rule AS 1990 1994 even Mar Sun>=18 2:00s 0 -
+Rule AS 1990 1994 odd Mar Sun>=1 2:00s 0 -
+Rule AS 1995 max - Mar lastSun 2:00s 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Australia/Adelaide 9:14:20 - LMT 1895 Feb
9:00 - CST 1899 May
9:30 - CST 1917 Jan 1 0:01
- 9:30 Aus CST 1971 Oct lastSun 2:00
+ 9:30 Aus CST 1971 Oct lastSun 2:00s
9:30 AS CST
# Tasmania
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule AT 1967 only - Oct 1 2:00 1:00 -
-Rule AT 1968 only - Mar 31 3:00 0 -
-Rule AT 1968 1985 - Oct lastSun 2:00 1:00 -
-Rule AT 1969 1971 - Mar Sun>=8 3:00 0 -
-Rule AT 1972 only - Feb 27 3:00 0 -
-Rule AT 1973 1981 - Mar Sun>=1 3:00 0 -
-Rule AT 1982 1983 - Mar lastSun 3:00 0 -
-Rule AT 1984 1986 - Mar Sun>=1 3:00 0 -
-Rule AT 1986 only - Oct 19 2:00 1:00 -
-Rule AT 1987 1990 - Mar Sun>=15 3:00 0 -
-Rule AT 1987 1990 - Oct lastSun 2:00 1:00 -
-Rule AT 1991 max - Oct Sun>=1 2:00 1:00 -
-Rule AT 1991 max - Mar lastSun 3:00 0 -
+Rule AT 1967 only - Oct 1 2:00s 1:00 -
+Rule AT 1968 only - Mar 31 2:00s 0 -
+Rule AT 1968 1985 - Oct lastSun 2:00s 1:00 -
+Rule AT 1969 1971 - Mar Sun>=8 2:00s 0 -
+Rule AT 1972 only - Feb 27 2:00s 0 -
+Rule AT 1973 1981 - Mar Sun>=1 2:00s 0 -
+Rule AT 1982 1983 - Mar lastSun 2:00s 0 -
+Rule AT 1984 1986 - Mar Sun>=1 2:00s 0 -
+Rule AT 1986 only - Oct 19 2:00s 1:00 -
+Rule AT 1987 1990 - Mar Sun>=15 2:00s 0 -
+Rule AT 1987 1990 - Oct lastSun 2:00s 1:00 -
+Rule AT 1991 max - Oct Sun>=1 2:00s 1:00 -
+Rule AT 1991 max - Mar lastSun 2:00s 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Australia/Hobart 9:49:16 - LMT 1895 Sep
10:00 - EST 1917 Jan 1 0:01
- 10:00 Aus EST 1967 Oct 1 2:00
+ 10:00 Aus EST 1967 Oct 1 2:00s
10:00 AT EST
# Victoria
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule AV 1971 1985 - Oct lastSun 2:00 1:00 -
-Rule AV 1972 only - Feb 27 3:00 0 -
-Rule AV 1973 1985 - Mar Sun>=1 3:00 0 -
-Rule AV 1986 1990 - Mar Sun>=15 3:00 0 -
-Rule AV 1986 only - Oct 19 2:00 1:00 -
-Rule AV 1987 max - Oct lastSun 2:00 1:00 -
-Rule AV 1991 1994 - Mar Sun>=1 3:00 0 -
-Rule AV 1995 max - Mar lastSun 3:00 0 -
+Rule AV 1971 1985 - Oct lastSun 2:00s 1:00 -
+Rule AV 1972 only - Feb 27 2:00s 0 -
+Rule AV 1973 1985 - Mar Sun>=1 2:00s 0 -
+Rule AV 1986 1990 - Mar Sun>=15 2:00s 0 -
+Rule AV 1986 only - Oct 19 2:00s 1:00 -
+Rule AV 1987 max - Oct lastSun 2:00s 1:00 -
+Rule AV 1991 1994 - Mar Sun>=1 2:00s 0 -
+Rule AV 1995 max - Mar lastSun 2:00s 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Australia/Melbourne 9:39:52 - LMT 1895 Feb
10:00 - EST 1917 Jan 1 0:01
- 10:00 Aus EST 1971 Oct 31 2:00
+ 10:00 Aus EST 1971 Oct 31 2:00s
10:00 AV EST
# New South Wales
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule AN 1971 1985 - Oct lastSun 2:00 1:00 -
-Rule AN 1972 only - Feb 27 3:00 0 -
-Rule AN 1973 1985 - Mar Sun>=1 3:00 0 -
-Rule AN 1986 1989 - Mar Sun>=15 3:00 0 -
-Rule AN 1986 only - Oct 19 2:00 1:00 -
-Rule AN 1987 max - Oct lastSun 2:00 1:00 -
-Rule AN 1990 1995 - Mar Sun>=1 3:00 0 -
-Rule AN 1996 max - Mar lastSun 3:00 0 -
+Rule AN 1971 1985 - Oct lastSun 2:00s 1:00 -
+Rule AN 1972 only - Feb 27 2:00s 0 -
+Rule AN 1973 1981 - Mar Sun>=1 2:00s 0 -
+Rule AN 1982 only - Apr Sun>=1 2:00s 0 -
+Rule AN 1983 1985 - Mar Sun>=1 2:00s 0 -
+Rule AN 1986 1989 - Mar Sun>=15 2:00s 0 -
+Rule AN 1986 only - Oct 19 2:00s 1:00 -
+Rule AN 1987 max - Oct lastSun 2:00s 1:00 -
+Rule AN 1990 1995 - Mar Sun>=1 2:00s 0 -
+Rule AN 1996 max - Mar lastSun 2:00s 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Australia/Sydney 10:04:52 - LMT 1895 Feb
10:00 - EST 1917 Jan 1 0:01
- 10:00 Aus EST 1971 Oct 31 2:00
+ 10:00 Aus EST 1971 Oct 31 2:00s
10:00 AN EST
Zone Australia/Broken_Hill 9:25:48 - LMT 1895 Feb
10:00 - EST 1896 Aug 23
9:00 - CST 1899 May
9:30 - CST 1917 Jan 1 0:01
- 9:30 Aus CST 1971 Oct 31 2:00
+ 9:30 Aus CST 1971 Oct 31 2:00s
9:30 AN CST
-# Australian Capital Territory
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Australia/Canberra 9:56:32 - LMT 1895 Feb
- 10:00 - EST 1917 Jan 1 0:01
- 10:00 Aus EST 1971 Oct 31 2:00
- 10:00 AN EST 1981 Oct 25 2:00
- 10:00 1:00 EST 1982 Apr 4 3:00
- 10:00 AN EST
+# Lord Howe Island
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
+Rule LH 1981 1984 - Oct lastSun 2:00s 1:00 -
+Rule LH 1982 1985 - Mar Sun>=1 2:00s 0 -
+Rule LH 1985 only - Oct lastSun 2:00s 0:30 -
+Rule LH 1986 1989 - Mar Sun>=15 2:00s 0 -
+Rule LH 1986 only - Oct 19 2:00s 0:30 -
+Rule LH 1987 max - Oct lastSun 2:00s 0:30 -
+Rule LH 1990 1995 - Mar Sun>=1 2:00s 0 -
+Rule LH 1996 max - Mar lastSun 2:00s 0 -
+Zone Australia/Lord_Howe 10:36:20 - LMT 1895 Feb
+ 10:00 - EST 1981 Mar
+ 10:30 LH LHST
# Australian miscellany
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Australia/Lord_Howe 10:36:20 - LMT 1895 Feb
- 10:00 - EST 1981 Mar
- 10:30 AN LHST
Zone Indian/Christmas 7:02:52 - LMT 1895 Feb
7:00 - JVT
#
# Ashmore Is, Cartier
+# no indigenous inhabitants; only seasonal caretakers
# no information; probably like Australia/Perth
#
+# Coral Sea Is
+# no indigenous inhabitants; only meteorologists
+# no information
+#
# Macquarie, Manihiki, Penrhyn, Rakehanga
# no information
10:00 - GST
# Howland, Baker
-# no information; probably like Pacific/Samoa
+# uninhabited since World War II
+# no information; was probably like Pacific/Pago_Pago
# Jarvis
-# no information; probably like Pacific/Kiritimati
+# uninhabited since 1958
+# no information; was probably like Pacific/Kiritimati
# Johnston
-# no information; probably like Pacific/Honolulu
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone Pacific/Johnston -10:00 - HST
+
+# Kingman
+# uninhabited
# Kiribati
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-10:40 - LIT 1979 Oct # Line Is Time
-10:00 - THT
+# N Mariana Is
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone Pacific/Saipan 9:43:00 - LMT 1901
+ 9:00 - PLT 1969 Oct
+ 10:00 - GST
+
+# Marshall Is
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone Pacific/Majuro 11:24:48 - LMT 1901
+ 11:00 - NCST 1969 Oct
+ 12:00 - NZST
+Zone Pacific/Kwajalein 11:09:20 - LMT 1901
+ 11:00 - NCST 1969 Oct
+ -12:00 - KJT 1993 Aug 20
+ 12:00 - NZST
+
+# Micronesia
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone Pacific/Yap 9:12:32 - LMT 1901 # Colonia
+ 9:00 - PLT 1969 Oct
+ 10:00 - GST
+Zone Pacific/Truk 10:07:08 - LMT 1901
+ 10:00 - GST 1978 Oct
+ 11:00 - NCST
+Zone Pacific/Ponape 10:32:52 - LMT 1901 # Kolonia
+ 11:00 - NCST
+Zone Pacific/Kosrae 10:51:56 - LMT 1901
+ 11:00 - NCST 1969 Oct
+ 12:00 - NZST
+
# Nauru
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Nauru 11:07:40 - LMT 1921 Jan 15 # Uaobe
Rule NZ 1868 only - Jan 1 0:00 0 S
# Shanks gives 1927 Nov 6 - 1928 Mar 4, 1928 Oct 14 - 1929 Mar 17,
# 1929 Oct 13 - 1930 Mar 16; go with Whitman.
-Rule NZ 1927 only - Nov 26 2:00 1:00 D
+Rule NZ 1927 only - Nov 26 2:00 0:30 HD
Rule NZ 1928 1929 - Mar Sun>=1 2:00 0 S
-Rule NZ 1928 only - Nov 4 2:00 1:00 D
-Rule NZ 1929 only - Oct 30 2:00 1:00 D
+Rule NZ 1928 only - Nov 4 2:00 0:30 HD
+Rule NZ 1929 only - Oct 30 2:00 0:30 HD
Rule NZ 1930 1933 - Mar Sun>=15 2:00 0 S
-Rule NZ 1930 1933 - Oct Sun>=8 2:00 1:00 D
-# Shanks says DST stopped 1940 Sep lastSun; go with Whitman for war years.
-Rule NZ 1934 1944 - Apr lastSun 2:00 0 S
-Rule NZ 1934 1944 - Sep lastSun 2:00 1:00 D
+Rule NZ 1930 1933 - Oct Sun>=8 2:00 0:30 HD
+# Whitman says DST went on and off during war years, and the base GMT offset
+# didn't change until 1945 Apr 30; go with Shanks.
+Rule NZ 1934 1940 - Apr lastSun 2:00 0 S
+Rule NZ 1934 1939 - Sep lastSun 2:00 0:30 HD
Rule NZ 1974 only - Nov 3 2:00s 1:00 D
Rule NZ 1975 1988 - Oct lastSun 2:00s 1:00 D
Rule NZ 1989 only - Oct 8 2:00s 1:00 D
Rule NZ 1990 max - Mar Sun>=15 2:00s 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Auckland 11:39:04 - LMT 1868
- # Shanks gives 1940 Sep 29 2:00;
- # go with Whitman.
- 11:30 NZ NZ%sT 1945 Apr 29 2:00
+ 11:30 NZ NZ%sT 1940 Sep 29 2:00
12:00 NZ NZ%sT
-Zone Pacific/Chatham 12:45 - NZ-CHAT
+Zone Pacific/Chatham 12:45 NZ CH%sT
# Antipodes Is, Kermadec Is
11:12 - NMT 1951
11:30 - NRFT
-# Pacific Islands Trust Territories
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Pacific/Majuro 11:24:48 - LMT 1901
- 11:00 - NCST 1969 Oct
- 12:00 - NZST
-Zone Pacific/Kwajalein 11:09:20 - LMT 1901
- 11:00 - NCST 1969 Oct
- -12:00 - KJT 1993 Aug 20
- 12:00 - NZST
-Zone Pacific/Truk 10:07:08 - LMT 1901
- 10:00 - GST 1978 Oct
- 11:00 - NCST
-Zone Pacific/Ponape 10:33:00 - LMT 1901
- 11:00 - NCST
-Zone Pacific/Yap 9:12:24 - LMT 1901
- 9:00 - PLT 1969 Oct
- 10:00 - GST
-
# Palau
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Palau 8:57:56 - LMT 1901 # Koror
9:00 - PLT
# Palmyra
-# no information; probably like Pacific/Kiritmati
+# uninhabited since World War II; was probably like Pacific/Kiritmati
# Papua New Guinea
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Pitcairn -8:40:20 - LMT 1901 # Adamstown
-8:30 - PIT
+# American Samoa
+Zone Pacific/Pago_Pago 12:37:12 - LMT 1879 Jul 5
+ -11:22:48 - LMT 1911
+ -11:30 - SST 1950
+ -11:00 - NST 1967 Apr # N=Nome
+ -11:00 - BST 1983 Nov 30 # B=Bering
+ -11:00 - SST # S=Samoa
+
+# W Samoa
+Zone Pacific/Apia 12:33:04 - LMT 1879 Jul 5
+ -11:26:56 - LMT 1911
+ -11:30 - SST 1950
+ -11:00 - SST
+
# Solomon Is
# excludes Bougainville, for which see Papua New Guinea
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Vanuatu 1912 only - Jan 13 0:00 0 S
Rule Vanuatu 1983 only - Sep 25 0:00 1:00 D
-Rule Vanuatu 1984 max - Mar Sun>=23 0:00 0 S
+Rule Vanuatu 1984 1991 - Mar Sun>=23 0:00 0 S
Rule Vanuatu 1984 only - Oct 23 0:00 1:00 D
-Rule Vanuatu 1985 max - Sep Sun>=23 0:00 1:00 D
+Rule Vanuatu 1985 1990 - Sep Sun>=23 0:00 1:00 D
+Rule Vanuatu 1991 max - Sep lastSun 0:00 1:00 D
+Rule Vanuatu 1992 max - Mar lastSun 0:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Efate 11:13:16 - LMT 1912 Jan 13 # Vila
11:00 - NCST
Zone Pacific/Wallis 12:15:20 - LMT 1901
12:00 - NZST
-# Western Samoa
-# See Pacific/Samoa in the `northamerica' file, of all places.
-
###############################################################################
# NOTES
# 11:00 NCST NCDT New Caledonia*
# 11:30 NRFT Norfolk*
# 12:00 NZST NZDT New Zealand
-# 12:45 NZ-CHAT Chatham
+# 12:45 CHST CHDT Chatham*
# 13:00 TGT Tongatapu*
# -12:00 KJT Kwajalein (no longer used)*
# -11:00 SST Samoa
# -10:40 LIT Line Is (no longer used)*
# -10:00 THT Tahiti*
+# -10:00 HST Hawaii
# - 9:30 MQT Marquesas*
# - 9:00 GBT Gambier*
# - 8:30 PIT Pitcairn*
#
-# See the `northamerica' file for Hawaii and Samoa.
+# See the `northamerica' file for Hawaii.
# See the `southamerica' file for Easter I and the Galapagos Is.
#
# See the `africa' file for Zone naming conventions.
# WST for any place operating at a GMTOFF of 8:00
# EST for any place operating at a GMTOFF of 10:00
-# From Paul Eggert (November 8, 1994):
+# From Paul Eggert (1995-12-19):
# Shanks reports 2:00 for all autumn changes in Australia and New Zealand.
# Mark Prior <mrp@itd.adelaide.edu.au> writes that his newspaper
# reports that NSW's fall 1995 change will occur at 2:00,
# but Robert Elz says it's been 3:00 in Victoria since 1970
# and perhaps the newspaper's `2:00' is referring to standard time.
-# And Robert Uzgalis <buz@cs.aukuni.ac.nz> says that the New Zealand Daylight
-# Savings Time Order in Council dated 1990-06-18 specifies 2:00 standard
-# time on both the first Sunday in October and the third Sunday in March.
-# For now we'll continue to assume 3:00 for changes since 1970.
+# For now we'll continue to assume 2:00s for changes since 1960.
# Northern Territory
# Lord Howe Island is located off the New South Wales coast, and is half an
# hour ahead of NSW time.
+# From Paul Eggert (1995-12-19):
+# For Lord Howe we use Shanks through its time of publication (1991).
+# Lord Howe is part of NSW, so we'll guess it has used the same transition
+# times as NSW since 1991, even though Shanks writes that Lord Howe went
+# with Victoria when NSW and Victoria disagreed in 1982.
+
###############################################################################
# New Zealand, from Elz' asia 1.1
# The chosen rules use the Davies October 8 values for the start of DST in 1989
# rather than the October 1 value.
+# From Paul Eggert (1995-12-19);
+# Shanks reports 2:00 for all autumn changes in Australia and New Zealand.
+# Robert Uzgalis <buz@cs.aukuni.ac.nz> writes that the New Zealand Daylight
+# Savings Time Order in Council dated 1990-06-18 specifies 2:00 standard
+# time on both the first Sunday in October and the third Sunday in March.
+# As with Australia, we'll assume the tradition is 2:00s, not 2:00.
+#
+# Shanks gives no data for Chatham, but usno1995 says it's +12:45/+13:45.
+# Guess NZ switchover rules for now.
+
###############################################################################
# Fiji
# enacted an ordinance standardizing the islands on +12:00.
# Perhaps it didn't take. We go with Shanks's more precise date in 1915.
+# Johnston
+
+# Johnston data is from usno1995.
+
# Kwajalein
# In comp.risks 14.87 (26 August 1993), Peter Neumann writes:
# respect to the International Date Line, to rejoin its fellow islands,
# going from 11:59 p.m. Thursday to 12:00 m. Saturday in a blink.
-# Pacific Islands Trust Territories
+# N Mariana Is, Guam
# Howse writes (p 162) ``The Spaniards, on the other hand, reached the
# Philippines and the Ladrones from America,'' and implies that the Ladrones
# (now called the Marianas) kept American date for quite some time.
# Ignore this for now, as we have no hard data. See also Asia/Manila.
+
+# Samoa
+
+# Howse writes that in 1879 the King of Samoa decided to change
+# ``the date in his kingdom from the Antipodean to the American system,
+# ordaining -- by a masterpiece of diplomatic flattery -- that
+# the Fourth of July should be celebrated twice in that year.''
-# @(#)backward 7.9
+# @(#)backward 7.12
# This file provides links between current names for time zones
# and their old names. Many names changed in late 1993.
-Link Australia/Canberra Australia/ACT
+Link America/Adak America/Atka
+Link America/Indianapolis America/Fort_Wayne
+Link America/Indiana/Knox America/Knox_IN
+Link America/St_Thomas America/Virgin
+Link Australia/Sydney Australia/ACT
+Link Australia/Sydney Australia/Canberra
Link Australia/Lord_Howe Australia/LHI
Link Australia/Sydney Australia/NSW
Link Australia/Darwin Australia/North
Link America/Tijuana Mexico/BajaNorte
Link America/Mazatlan Mexico/BajaSur
Link America/Mexico_City Mexico/General
-Link America/Shiprock Navajo
+Link America/Denver Navajo
Link Pacific/Auckland NZ
Link Pacific/Chatham NZ-CHAT
+Link Pacific/Pago_Pago Pacific/Samoa
Link Asia/Shanghai PRC
Link Europe/Warsaw Poland
Link Europe/Lisbon Portugal
Link Europe/Istanbul Turkey
Link Etc/UCT UCT
Link America/Anchorage US/Alaska
-Link America/Atka US/Aleutian
+Link America/Adak US/Aleutian
Link America/Phoenix US/Arizona
Link America/Chicago US/Central
-Link America/Fort_Wayne US/East-Indiana
+Link America/Indianapolis US/East-Indiana
Link America/New_York US/Eastern
Link Pacific/Honolulu US/Hawaii
-Link America/Knox_IN US/Indiana-Starke
+Link America/Indiana/Knox US/Indiana-Starke
Link America/Detroit US/Michigan
Link America/Denver US/Mountain
Link America/Los_Angeles US/Pacific
-Link Pacific/Samoa US/Samoa
+Link Pacific/Pago_Pago US/Samoa
Link Etc/UTC UTC
Link Etc/Universal Universal
Link Europe/Moscow W-SU
-# @(#)europe 7.17
+# @(#)europe 7.31
# This data is by no means authoritative; if you think you know better,
# go ahead and edit the file (and please send any changes to
# tz@elsie.nci.nih.gov for general use in the future).
-# From Paul Eggert <eggert@twinsun.com> (November 18, 1993):
+# From Paul Eggert <eggert@twinsun.com> (1995-12-19):
# A good source for time zone historical data outside the U.S. is
# Thomas G. Shanks, The International Atlas (3rd edition),
# San Diego: ACS Publications, Inc. (1991).
# 2:00 EET+DST Eastern Europe
# 3:00 MSK MSD Moscow
# 3:00 TUR+DST Turkey (no longer used)*
-# 4:00 KSK KSD Kuybyshev*
-# 5:00 ESK ESD Yekaterinburg*
-# 6:00 OSK OSD Omsk*
-# 6:00 NSK NSD Novosibirsk (was 7:00 until 1994)
-# 7:00 TSK TSD Tomsk*
-# 8:00 ISK ISD Irkutsk*
-# 9:00 YSK YSD Yakutsk*
-# 10:00 VSK VSD Vladivostok*
-# 11:00 GSK GSD Magadan*
-# 12:00 PSK PSD Petropavlovsk-Kamchatski*
-# 13:00 ASK ASD Anadyr*
+# 4:00 KSK KSD Kuybyshev (was 3:00)*
+# 5:00 ESK ESD Yekaterinburg (was 4:00) (was SSK, SSD)*
+# 6:00 OSK OSD Omsk (was 5:00)*
+# 6:00 NSK NSD Novosibirsk (was 7:00)
+# 7:00 TSK TSD Tomsk (was 6:00)*
+# 8:00 ISK ISD Irkutsk (was 7:00)*
+# 9:00 YSK YSD Yakutsk (was 8:00)*
+# 10:00 VSK VSD Vladivostok (was 9:00)*
+# 11:00 MSK MSD Magadan (was 10:00)*
+# 12:00 PSK PSD Petropavlovsk-Kamchatski (was 11:00)*
+# 13:00 ASK ASD Anadyr (was 12:00)*
#
# See the `africa' file for Zone naming conventions.
#
# LST is Local Star Time (``mestnoe zvezdnoe vremya'').
# From Peter Ilieve <peter@memex.co.uk> (December 4, 1994),
-# The original six [EU members]: Belguim, France, (West) Germany, Italy,
+# The original six [EU members]: Belgium, France, (West) Germany, Italy,
# Luxembourg, the Netherlands.
# Plus, from 1 Jan 73: Denmark, Ireland, United Kingdom.
# Plus, from 1 Jan 81: Greece.
# referendum in 1972, they are the only country to have said No twice.
# Referendums in the other three countries voted Yes.)
# ...
-# The only [current nonmember using EU rules] I can speak for is Estonia,
-# which uses EU dates but not at 01:00 GMT, they use midnight GMT. I don't
-# think they know yet what they will do from 1996 onwards.
+# Estonia ... uses EU dates but not at 01:00 GMT, they use midnight GMT.
+# I don't think they know yet what they will do from 1996 onwards.
# ...
# There shouldn't be any [current members who are not using EU rules].
# A Directive has the force of law, member states are obliged to enact
# seventh Summer Time Directive....
# From Peter Ilieve <peter@memex.co.uk> (March 28, 1994):
-# The UK/Eire end date of 22 October [1995] conflicts with your current rule of
-# Oct Sun>=23, and the historical UK formula of Sun after 4th Sat.
+# The [GB-Eire] end date of 22 October [1995] conflicts with your current rule
+# of Oct Sun>=23, and the historical UK formula of Sun after 4th Sat.
# The last time 4th Sun and Sun after 4th Sat differed was in 1989,
# when 29 October was used. That year was covered by a UK Summer Time Order
# for only a single year and it looks as though there was a matching 4th EC
3:00 Russia MS%s 1922 Oct
2:00 - EET 1930 Jun 21
3:00 Russia MS%s 1991 Mar 31 2:00s
-# From Paul Eggert <eggert@twinsun.com> (May 28, 1994): A guess at recent dates:
2:00 1:00 "EET DST" 1991 Sep 29 2:00s
- 2:00 - EET 1992 Jan 19 2:00s
- 3:00 Russia MS%s
+ 2:00 M-Eur EET%s
+# This may change to `EC' soon.
# Belgium
# Whitman and Shanks disagree; go with Shanks, usually.
Rule France 1944 only - Oct 8 1:00 1:00 " DST"
Rule France 1945 only - Apr 2 2:00 2:00 " DDST"
Rule France 1945 only - Sep 16 3:00 0 -
-# From Paul Eggert <eggert@twinsun.com) (November 18, 1993):
-# Shanks gives no times for 1975, but according to Cm722,
-# France introduced summer time in 1975 from 20 March to 22 September.
-Rule France 1975 only - Mar 20 2:00s 1:00 " DST"
-Rule France 1975 only - Sep 22 2:00s 0 -
Rule France 1976 only - Mar 28 2:00s 1:00 " DST"
Rule France 1976 only - Sep lastSun 2:00s 0 -
# Shanks gives 0:09 for Paris Mean Time, and Whitman gives 0:09:05,
0:00 Lux WET%s 1929 Oct 6 2:00s
0:00 Belgium WET%s 1940 May 14 3:00
1:00 M-Eur WET%s 1944 Sep 18 3:00
- 1:00 Belgium MET%s 1979
+ 1:00 Belgium MET%s 1977
1:00 EC MET%s
# Macedonia
9:00 1:00 VSD 1991 Sep 29 2:00s
9:00 - VSK 1992 Jan 19 2:00s
10:00 Russia VS%s
-# MSK is taken; settle for GSK.
Zone Asia/Magadan 10:03:12 - LMT 1924 May 2
- 10:00 - GSK 1957 Mar
- 11:00 Russia GS%s 1991 Mar 31 2:00s
- 10:00 1:00 GSD 1991 Sep 29 2:00s
- 10:00 - GSK 1992 Jan 19 2:00s
- 11:00 Russia GS%s
+ 10:00 - MSK 1957 Mar
+ 11:00 Russia MS%s 1991 Mar 31 2:00s
+ 10:00 1:00 MSD 1991 Sep 29 2:00s
+ 10:00 - MSK 1992 Jan 19 2:00s
+ 11:00 Russia MS%s
# This name should be Asia/Petropavlovsk-Kamchatski, but that's too long.
Zone Asia/Kamchatka 10:34:36 - LMT 1924 May 2
11:00 - PSK 1957 Mar
-# @(#)northamerica 7.17
+# @(#)northamerica 7.21
# also includes Central America and the Caribbean
# This data is by no means authoritative; if you think you know better,
# United States
+# From Paul Eggert <eggert@twinsun.com> (1995-12-19):
+# A good source for time zone historical data in the US is
+# Thomas G. Shanks, The American Atlas (5th edition),
+# San Diego: ACS Publications, Inc. (1991).
+# Make sure you have the errata sheet; the book is somewhat useless without it.
+# It is the source for the US and Puerto Rico entries below.
+
# From Arthur David Olson:
# US Daylight Saving Time ended on the last Sunday of *October* in 1974.
# See, for example, the front page of the Saturday, October 26, 1974
# and Sunday, October 27, 1974 editions of the Washington Post.
-# From seismo!munnari!kre:
-# I recall also being told by someone once that Canada didn't have
-# the DST variations in 74/75 that the US did, but I am not nearly
-# sure enough of this to add anything.
-
-# From Arthur David Olson:
-# The above has been confirmed by Bob Devine; we'll go with it here.
-
# From Arthur David Olson:
# Before the Uniform Time Act of 1966 took effect in 1967, observance of
# Daylight Saving Time in the US was by local option, except during wartime.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
+Rule US 1918 1919 - Mar lastSun 2:00 1:00 W # War
Rule US 1918 1919 - Oct lastSun 2:00 0 S
Rule US 1942 only - Feb 9 2:00 1:00 W # War
Rule US 1945 only - Sep 30 2:00 0 S
# 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 (January 19, 1989):
# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
# Hawaii-Aleutian standard time
# Samoa standard time
# The law doesn't give abbreviations.
+#
+# From Paul Eggert (1995-12-19):
+# Shanks uses 1983-10-30, not 1983-11-30, for the 1983 transitions.
+# Go with Shanks.
+
+# US Eastern time, represented by New York
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
+Rule NYC 1920 only - Oct lastSun 2:00 0 S
+Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
+Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
+Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:00
+ -5:00 US E%sT 1920
+ -5:00 NYC E%sT 1942
+ -5:00 US E%sT 1946
+ -5:00 NYC E%sT 1967
+ -5:00 US E%sT
+
+# US Central time, represented by Chicago
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule Chicago 1920 only - Jun 13 2:00 1:00 D
+Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
+Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D
+Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D
+Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S
+Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00
+ -6:00 US C%sT 1920
+ -6:00 Chicago C%sT 1936 Mar 1 2:00
+ -5:00 - EST 1936 Nov 15 2:00
+ -6:00 Chicago C%sT 1942
+ -6:00 US C%sT 1946
+ -6:00 Chicago C%sT 1967
+ -6:00 US C%sT
+
+# US Mountain time, represented by Denver
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
+Rule Denver 1920 only - Oct lastSun 2:00 0 S
+Rule Denver 1921 only - May 22 2:00 0 S
+Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
+Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00
+ -7:00 US E%sT 1920
+ -7:00 Denver E%sT 1942
+ -7:00 US E%sT 1946
+ -7:00 Denver E%sT 1967
+ -7:00 US E%sT
+
+# US Pacific time, represented by Los Angeles
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule CA 1948 only - Mar 14 2:00 1:00 D
+Rule CA 1949 only - Jan 1 2:00 0 S
+Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D
+Rule CA 1950 1961 - Sep lastSun 2:00 0 S
+Rule CA 1962 1966 - Oct lastSun 2:00 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:00
+ -8:00 US P%sT 1946
+ -8:00 CA P%sT 1967
+ -8:00 US P%sT
-# From Paul Eggert <eggert@twinsun.com> (August 16, 1994):
+# Alaska
+# AK%sT is the modern abbreviation for -9:00 per USNO.
+#
+# From Paul Eggert (1995-12-19):
# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
# and from east-of-GMT to west-of-GMT days, in 1867 when the US purchased it
-# from Russia. We don't have this data pinned down yet, though.
-
-# Easy stuff first--including Alaska, where we ignore history (since we
-# can't tell if we should give Yukon time or Alaska-Hawaii time for "old"
-# times).
-
+# from Russia. We omit this transition, since we can't represent changes
+# from Julian to Gregorian.
+#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone America/New_York -5:00 US E%sT
-Zone America/Chicago -6:00 US C%sT
-Zone America/Denver -7:00 US M%sT
-Zone America/Los_Angeles -8:00 US P%sT
-Zone America/Anchorage -9:00 US AK%sT
- # AK%sT is the abbreviation per USNO
+Zone America/Juneau -8:57:41 - LMT 1900 Aug 20 12:00
+ -8:00 - PST 1942
+ -8:00 US P%sT 1946
+ -8:00 - PST 1969
+ -8:00 US P%sT 1983 Oct 30 2:00
+ -9:00 US AK%sT
+Zone America/Yakutat -9:18:55 - LMT 1900 Aug 20 12:00
+ -9:00 - YST 1942
+ -9:00 US Y%sT 1946
+ -9:00 - YST 1969
+ -9:00 US Y%sT 1983 Oct 30 2:00
+ -9:00 US AK%sT
+Zone America/Anchorage -9:59:36 - LMT 1900 Aug 20 12:00
+ -10:00 - CAT 1942
+ -10:00 US CAT/CAWT 1946
+ -10:00 - CAT 1967 Apr
+ -10:00 - AHST 1969
+ -10:00 US AH%sT 1983 Oct 30 2:00
+ -9:00 US AK%sT
+Zone America/Nome -11:01:38 - LMT 1900 Aug 20 12:00
+ -11:00 - NST 1942
+ -11:00 US N%sT 1946
+ -11:00 - NST 1967 Apr
+ -11:00 - BST 1969
+ -11:00 US B%sT 1983 Oct 30 2:00
+ -9:00 US AK%sT
+Zone America/Adak -11:46:38 - LMT 1900 Aug 20 12:00
+ -11:00 - NST 1942
+ -11:00 US N%sT 1946
+ -11:00 - NST 1967 Apr
+ -11:00 - BST 1969
+ -11:00 US B%sT 1983 Oct 30 2:00
+ -10:00 US HA%sT
+# Shanks writes that part of southwest Alaska (e.g. Aniak)
+# switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
+# and another part (e.g. Akiak) made the same switch five weeks later.
+# These switches don't quite make our 1970 cutoff.
+
+# Hawaii
+#
+# From Arthur David Olson:
+# And then there's Hawaii.
+# DST was observed for one day in 1933;
+# standard time was changed by half an hour in 1947;
+# it's always standard as of 1986.
+#
+# From Paul Eggert:
+# Shanks says the 1933 experiment lasted for three weeks. Go with Shanks.
+#
+Zone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00
+ -10:30 - HST 1933 Apr 30 2:00
+ -10:30 1:00 HDT 1933 May 21 2:00
+ -10:30 US H%sT 1947 Jun 8 2:00
+ -10:00 - HST
-# Mainland US areas that are always Standard as of 1986.
+Zone Pacific/Midway -11:49:28 - LMT 1901
+ -11:00 - NST 1967 Apr # N=Nome
+ -11:00 - BST 1983 Nov 30 # B=Bering
+ -11:00 - SST # S=Samoa
-Zone America/Fort_Wayne -5:00 US E%sT 1946
- -5:00 - EST # Always EST as of 1986
-# From Arthur David Olson (October 28, 1991):
-# An article on page A3 of the Sunday, October 27, 1991 Washington Post
-# notes that Starke County switched from Central time to Eastern time as of
-# October 27, 1991.
-Zone America/Knox_IN -6:00 US C%sT 1991 Oct 27 2:00
- -5:00 - EST # Always EST as of 1991
-Zone America/Phoenix -7:00 US M%sT 1946
- -7:00 - MST # Always MST as of 1986
+# Now we turn to US areas that have diverged from the consensus since 1970.
+# Arizona mostly uses MST.
+Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 12:00
+ -7:00 US M%sT 1944 Jan 1 00:01
+ -7:00 - MST 1944 Mar 17 00:01
+ -7:00 US M%sT 1944 Oct 1 00:01
+ -7:00 - MST 1967
+ -7:00 US M%sT 1968
+ -7:00 - MST
# From Arthur David Olson (February 13, 1988):
-# However. . .a writer from the Inter Tribal Council of Arizona, Inc.,
+# A writer from the Inter Tribal Council of Arizona, Inc.,
# notes in private correspondence dated 12/28/87 that "Presently, only the
# Navajo Nation participates in the Daylight Saving Time policy, due to its
# large size and location in three states." (The "only" means that other
# tribal nations don't use DST.)
-Link America/Denver America/Shiprock
-
-# From Bob Devine (January 28, 1988):
-# Michigan didn't observe DST from 1968 to 1973.
+Link America/Denver America/Shiprock
-Zone America/Detroit -5:00 US E%sT 1968
- -5:00 - EST 1973
- -5:00 US E%sT
+# Southern Idaho and eastern Oregon switched four weeks late in 1974.
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00
+ -8:00 US P%sT 1923 May 13 2:00
+ -7:00 US M%sT 1974
+ -7:00 - MST 1974 Feb 3 2:00
+ -7:00 US M%sT
-# Samoa just changes names. No DST, per Naval Observatory.
+# Indiana
#
-# Howse writes that in 1879 the King of Samoa decided to change
-# ``the date in his kingdom from the Antipodean to the American system,
-# ordaining -- by a masterpiece of diplomatic flattery -- that
-# the Fourth of July should be celebrated twice in that year.''
-
-Zone Pacific/Samoa 12:37:12 - LMT 1879 Jul 5
- -11:22:48 - LMT 1911
- -11:30 - SST 1950
- -11:00 - NST 1967 Apr # N=Nome
- -11:00 - BST 1983 Nov 30 # B=Bering
- -11:00 - SST # S=Samoa
-
-Zone Pacific/Midway -11:49:28 - LMT 1901
- -11:00 - NST 1967 Apr # N=Nome
- -11:00 - BST 1983 Nov 30 # B=Bering
- -11:00 - SST # S=Samoa
-
-# Aleutian has a name change. DST, per Naval Observatory.
-
-Zone America/Atka -10:00 US AH%sT 1983 Nov 30
- -10:00 US HA%sT
+# From Paul Eggert (1995-12-19):
+# Indiana generally observes either EST all year, or CST/CDT,
+# but areas near Cincinnati and Louisville use those cities' timekeeping
+# and in 1969 and 1970 the whole state observed daylight time;
+# and there are other exceptions as noted below.
+# Shanks partitions Indiana into 345 regions, each with its own time history,
+# and writes ``Even newspaper reports present contradictory information.''
+# Fortunately, most of the complexity occurred before our cutoff date of 1970.
+#
+# Since 1970, EST-only Indiana has been like America/Indianapolis,
+# with exceptions noted below for Crawford, Starke, and Switzerland counties.
+# The parts of Indiana not listed below have been like America/Chicago,
+# America/Louisville, or America/New_York.
+#
+# Other than Indianapolis, the Indiana place names are so nondescript
+# that they would be ambiguous if we left them at the `America' level.
+# So we reluctantly put them all in a subdirectory `America/Indiana'.
+#
+# Most of EST-only Indiana last observed DST in 1970.
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
+Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
+Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:00
+ -6:00 US C%sT 1920
+ -6:00 Indianapolis C%sT 1942
+ -6:00 US C%sT 1946
+ -6:00 Indianapolis C%sT 1955 Apr 24 2:00
+ -5:00 - EST 1957 Sep 29 2:00
+ -6:00 - CST 1958 Apr 27 2:00
+ -5:00 - EST 1969
+ -5:00 US E%sT 1971
+ -5:00 - EST
+Link America/Indianapolis America/Indiana/Indianapolis
+#
+# Part of Crawford County, Indiana, last observed DST in 1975,
+# and left its clocks alone in 1974.
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D
+Rule Marengo 1951 only - Sep lastSun 2:00 0 S
+Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D
+Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:00
+ -6:00 US C%sT 1951
+ -6:00 Marengo C%sT 1961 Apr 30 2:00
+ -5:00 - EST 1969
+ -5:00 US E%sT 1974 Jan 6 2:00
+ -6:00 1:00 CDT 1974 Oct 27 2:00
+ -5:00 US E%sT 1976
+ -5:00 - EST
+#
+# Starke County, Indiana
+# From Arthur David Olson (October 28, 1991):
+# An article on page A3 of the Sunday, October 27, 1991 Washington Post
+# notes that Starke County switched from Central time to Eastern time as of
+# October 27, 1991.
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D
+Rule Starke 1947 1954 - Sep lastSun 2:00 0 S
+Rule Starke 1955 1956 - Oct lastSun 2:00 0 S
+Rule Starke 1957 1958 - Sep lastSun 2:00 0 S
+Rule Starke 1959 1961 - Oct lastSun 2:00 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:00
+ -6:00 US C%sT 1947
+ -6:00 Starke C%sT 1962 Apr 29 2:00
+ -5:00 - EST 1963 Oct 27 2:00
+ -6:00 US C%sT 1991 Oct 27 2:00
+ -5:00 - EST
+#
+# Switzerland County, Indiana, last observed DST in 1972.
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:00
+ -6:00 US C%sT 1954 Apr 25 2:00
+ -5:00 - EST 1969
+ -5:00 US E%sT 1973
+ -5:00 - EST
-# From Arthur David Olson:
-# And then there's Hawaii.
-# DST was observed for one day in 1933;
-# Standard time was change by half an hour in 1947;
-# it's always standard as of 1986.
+# Part of Kentucky left its clocks alone in 1974.
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule Louisville 1921 only - May 1 2:00 1:00 D
+Rule Louisville 1921 only - Sep 1 2:00 0 S
+Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D
+Rule Louisville 1941 only - Sep lastSun 2:00 0 S
+Rule Louisville 1946 only - Jun 2 2:00 0 S
+Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S
+Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Louisville -5:43:02 - LMT 1883 Nov 18 12:00
+ -6:00 US C%sT 1921
+ -6:00 Louisville C%sT 1942
+ -6:00 US C%sT 1946
+ -6:00 Louisville C%sT 1961 Jul 23 2:00
+ -5:00 - EST 1968
+ -5:00 US E%sT 1974 Jan 6 2:00
+ -6:00 1:00 CDT 1974 Oct 27 2:00
+ -5:00 US E%sT
-Zone Pacific/Honolulu -10:30 US H%sT 1933 Apr 30 2:00
- -10:30 1:00 HDT 1933 May 1 2:00
- -10:30 US H%sT 1947 Jun 8 2:00
- -10:00 - HST
+# Michigan
+#
+# From Bob Devine (January 28, 1988):
+# Michigan didn't observe DST from 1968 to 1973.
+#
+# From Paul Eggert (1995-12-19):
+# Shanks writes that Michigan started using standard time on 1885 Sep 18,
+# but Howse (p 126) writes that Detroit kept
+#
+# local time until 1900 when the City Council decreed that clocks should
+# be put back twenty-eight minutes to Central Standard Time. Half the
+# city obeyed, half refused. After considerable debate, the decision
+# was rescinded and the city reverted to Sun time. A derisive offer to
+# erect a sundial in front of the city hall was referred to the
+# Committee on Sewers. Then, in 1905, Central time was adopted
+# by city vote.
+#
+# This story is too entertaining to be false, so go with Howse over Shanks.
+#
+# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
+Rule Detroit 1948 only - Sep lastSun 2:00 0 S
+Rule Detroit 1967 only - Jun 14 2:00 1:00 D
+Rule Detroit 1967 only - Oct lastSun 2:00 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Detroit -5:32:11 - LMT 1905
+ -6:00 - CST 1915 May 15 2:00
+ -5:00 - EST 1942
+ -5:00 US E%sT 1946
+ -5:00 Detroit E%sT 1973
+ -5:00 US E%sT 1975
+ -5:00 - EST 1975 Apr 27 2:00
+ -5:00 US E%sT
+#
+# The Michigan border with Wisconsin switched from EST to CST/CDT in 1973.
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D
+Rule Menominee 1946 only - Sep lastSun 2:00 0 S
+Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D
+Rule Menominee 1966 only - Oct lastSun 2:00 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
+ -6:00 US C%sT 1946
+ -6:00 Menominee C%sT 1969 Apr 27 2:00
+ -5:00 - EST 1973 Apr 29 2:00
+ -6:00 US C%sT
# Navassa
-# no information; probably like America/New_York
+# uninhabited
# Old names, for S5 users
Link America/Chicago CST6CDT
Link America/Denver MST7MDT
Link America/Los_Angeles PST8PDT
-Link America/Fort_Wayne EST
+Link America/Indianapolis EST
Link America/Phoenix MST
Link Pacific/Honolulu HST
# From Paul Eggert <eggert@twinsun.com> (November 18, 1993):
-# A good source for time zone historical data outside the U.S. is
+# A good source for time zone historical data outside the US is
# Thomas G. Shanks, The International Atlas (3rd edition),
# San Diego: ACS Publications, Inc. (1991).
# Except where otherwise noted, it is the source for the data below.
Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S
Rule StJohns 1960 max - Oct lastSun 2:00 0 S
Rule StJohns 1987 only - Apr Sun>=1 2:00 1:00 D
-Rule StJohns 1988 only - Apr Sun>=1 2:00 2:00 D
+Rule StJohns 1988 only - Apr Sun>=1 2:00 2:00 DD
Rule StJohns 1989 max - Apr Sun>=1 2:00 1:00 D
# St John's has an apostrophe, but Posix file names can't have apostrophes.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
# Rules prior to 1987 are unknown.
# The comments in the OAG say "Only Ensenada, Mexicale, San Felipe and Tijuana
# observe DST." This is presumably Baja California Norte, above 28th parallel,
-# as listed there; Mexico/BajaSur is for "Baja California Sur and N. Pacific
+# as listed there; [there is also] "Baja California Sur and N. Pacific
# Coast (States of Sinaloa and Sonora)."
# From Bob Devine (January 28, 1988):
-5:00 - EST
# Clipperton
-# no information
+# uninhabited
# Costa Rica
# Shanks gives some very odd dates for 1991, and stops there.
# Puerto Rico
# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone America/Puerto_Rico -4:24:28 - LMT 1899 Mar 28 12:00 # San Juan
+Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
-4:00 - AST 1942 May 3
- -4:00 1:00 ADT 1945 Sep 30 2:00
+ -4:00 1:00 AWT 1945 Sep 30 2:00
-4:00 - AST
# St Kitts-Nevis
-5:00 - EST 1979 Apr 29 2:00
-5:00 US E%sT
-# Virgin Is (British and US)
+# British Virgin Is
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town
+ -4:00 - AST
+
+# Virgin Is
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone America/Virgin -4:19:44 - LMT 1911 Jul # Charlotte Amalie
+Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie
-4:00 - AST
-# @(#)pacificnew 7.7
+# @(#)pacificnew 7.8
# From Arthur David Olson (April 5, 1989):
# On April 5, 1989, the U. S. House of Representatives passed (238-154) a bill
## Rule Twilite XXXX max uspres Nov Sun>=7 2:00 0 S
## Rule Twilite XXXX max nonpres Oct lastSun 2:00 0 S
-# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
-## Zone US/Pacific-PET -8:00 US P%sT XXXX
-## -8:00 Twilite P%sT
+# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
+## Zone America/Los_Angeles-PET -8:00 US P%sT XXXX
+## -8:00 Twilite P%sT
# For now...
Link America/Los_Angeles US/Pacific-New ##
-# @(#)solar87 7.2
+# @(#)solar87 7.3
# So much for footnotes about Saudi Arabia.
# Apparent noon times below are for Riyadh; your mileage will vary.
# Riyadh is at about 46 degrees 46 minutes East: 3 hrs, 7 mins, 4 secs
# Before and after 1987, we'll operate on local mean solar time.
-# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
-Zone Mideast/Riyadh87 3:07:04 - ?? 1987
- 3:07:04 sol87 ?? 1988
- 3:07:04 - ??
+# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
+Zone Asia/Riyadh87 3:07:04 - ?? 1987
+ 3:07:04 sol87 ?? 1988
+ 3:07:04 - ??
+# For backward compatibility...
+Link Asia/Riyadh87 Mideast/Riyadh87
-# @(#)solar88 7.2
+# @(#)solar88 7.3
# Apparent noon times below are for Riyadh; they're a bit off for other places.
# Times were computed using formulas in the U.S. Naval Observatory's
# Riyadh is at about 46 degrees 46 minutes East: 3 hrs, 7 mins, 4 secs
# Before and after 1988, we'll operate on local mean solar time.
-# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
-Zone Mideast/Riyadh88 3:07:04 - ?? 1988
- 3:07:04 sol88 ?? 1989
- 3:07:04 - ??
+# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
+Zone Asia/Riyadh88 3:07:04 - ?? 1988
+ 3:07:04 sol88 ?? 1989
+ 3:07:04 - ??
+# For backward compatibility...
+Link Asia/Riyadh88 Mideast/Riyadh88
-# @(#)solar89 7.2
+# @(#)solar89 7.3
# Apparent noon times below are for Riyadh; they're a bit off for other places.
# Times were computed using a formula provided by the U. S. Naval Observatory:
# Riyadh is at about 46 degrees 46 minutes East: 3 hrs, 7 mins, 4 secs
# Before and after 1989, we'll operate on local mean solar time.
-# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
-Zone Mideast/Riyadh89 3:07:04 - ?? 1989
- 3:07:04 sol89 ?? 1990
- 3:07:04 - ??
+# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
+Zone Asia/Riyadh89 3:07:04 - ?? 1989
+ 3:07:04 sol89 ?? 1990
+ 3:07:04 - ??
+# For backward compatibility...
+Link Asia/Riyadh88 Mideast/Riyadh88
-# @(#)southamerica 7.8
+# @(#)southamerica 7.11
# This data is by no means authoritative; if you think you know better,
# go ahead and edit the file (and please send any changes to
-4:00 Arg A%sT 1969 Oct 5
-3:00 Arg AR%sT
+# Aruba
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
+ -4:30 - NAST 1965 # Netherlands Antilles
+ -4:00 - AST
+
# Bolivia
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/La_Paz -4:32:36 - LMT 1890
# ending dates, giving them as "estimated date(s) based on previous year". We
# infer a rule here from one example, always a dangerous practice.... Yes,
# they really do switch on Saturday, according to the OAG.
-# "Brazil/Acre" is for the Territory of Acre; "Brazil/DeNoronha" is for
-# Fernando De Noronha.
+# "[America/Porto_Acre]" is for the Territory of Acre;
+# "[America/Noronha]" is for Fernando De Noronha.
# From Bob Devine (January 28, 1988):
# The only information I found is that there was no DST up to 1985.
# Chile
-# From Guy Harris:
-# The OAG lists October 11, 1987 and March 12, 1988 as the starting and
-# ending dates, giving them as "estimated date(s) based on previous year."
-
-# From Bob Devine (January 28, 1988):
-# Chile has had 2nd Sunday in October to 2nd Sunday in March DST since 1977.
-# Switch is at midnight. OAG is right.
+# From Eduardo Krell (1995-10-19):
+# The law says to switch to DST at midnight [24:00] on the second SATURDAY
+# of October.... The law is the same for March and October.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Chile 1918 only - Sep 1 0:00 1:00 D
Rule Chile 1919 only - Jul 2 0:00 0 S
Rule Chile 1927 1931 - Sep 1 0:00 1:00 D
Rule Chile 1928 1932 - Apr 1 0:00 0 S
-Rule Chile 1969 max - Oct Sun>=8 0:00 1:00 D
-Rule Chile 1970 max - Mar Sun>=8 0:00 0 S
+Rule Chile 1969 max - Oct Sun>=9 0:00 1:00 D
+Rule Chile 1970 max - Mar Sun>=9 0:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Santiago -4:42:40 - LMT 1890
-4:43 - SMT 1910 # Santiago Mean Time
-2:00 - FST
# South Sandwich Is
-# no information
+# uninhabited
# Suriname
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
# Uruguay
# From Paul Eggert <eggert@twinsun.com> (November 18, 1993):
# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
-# Your guess is as good as mine for what happened after 1989.
# From Shanks (1991):
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Uruguay 1920 only - May 1 0:00 0 S
projects / openbsd / commitdiff