northamerica (7858:a7c341f30747) northamerica (8462:60e3cdbe8cdf)
1#
2# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3#
4# This code is free software; you can redistribute it and/or modify it
5# under the terms of the GNU General Public License version 2 only, as
6# published by the Free Software Foundation. Oracle designates this
7# particular file as subject to the "Classpath" exception as provided
8# by Oracle in the LICENSE file that accompanied this code.

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38###############################################################################
39
40# United States
41
42# From Paul Eggert (1999-03-31):
43# Howse writes (pp 121-125) that time zones were invented by
44# Professor Charles Ferdinand Dowd (1825-1904),
45# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
1#
2# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3#
4# This code is free software; you can redistribute it and/or modify it
5# under the terms of the GNU General Public License version 2 only, as
6# published by the Free Software Foundation. Oracle designates this
7# particular file as subject to the "Classpath" exception as provided
8# by Oracle in the LICENSE file that accompanied this code.

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38###############################################################################
39
40# United States
41
42# From Paul Eggert (1999-03-31):
43# Howse writes (pp 121-125) that time zones were invented by
44# Professor Charles Ferdinand Dowd (1825-1904),
45# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
46# His pamphlet ``A System of National Time for Railroads'' (1870)
46# His pamphlet "A System of National Time for Railroads" (1870)
47# was the result of his proposals at the Convention of Railroad Trunk Lines
48# in New York City (1869-10). His 1870 proposal was based on Washington, DC,
49# but in 1872-05 he moved the proposed origin to Greenwich.
50# His proposal was adopted by the railroads on 1883-11-18 at 12:00,
51# and the most of the country soon followed suit.
52
53# From Paul Eggert (2005-04-16):
54# That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
55# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
56
57# From Paul Eggert (2006-03-22):
58# A good source for time zone historical data in the US is
59# Thomas G. Shanks, The American Atlas (5th edition),
60# San Diego: ACS Publications, Inc. (1991).
61# Make sure you have the errata sheet; the book is somewhat useless without it.
62# It is the source for most of the pre-1991 US entries below.
63
64# From Paul Eggert (2001-03-06):
65# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
47# was the result of his proposals at the Convention of Railroad Trunk Lines
48# in New York City (1869-10). His 1870 proposal was based on Washington, DC,
49# but in 1872-05 he moved the proposed origin to Greenwich.
50# His proposal was adopted by the railroads on 1883-11-18 at 12:00,
51# and the most of the country soon followed suit.
52
53# From Paul Eggert (2005-04-16):
54# That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
55# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
56
57# From Paul Eggert (2006-03-22):
58# A good source for time zone historical data in the US is
59# Thomas G. Shanks, The American Atlas (5th edition),
60# San Diego: ACS Publications, Inc. (1991).
61# Make sure you have the errata sheet; the book is somewhat useless without it.
62# It is the source for most of the pre-1991 US entries below.
63
64# From Paul Eggert (2001-03-06):
65# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
66# in his whimsical essay ``An Economical Project for Diminishing the Cost
67# of Light'' published in the Journal de Paris (1784-04-26).
66# in his whimsical essay "An Economical Project for Diminishing the Cost
67# of Light" published in the Journal de Paris (1784-04-26).
68# Not everyone is happy with the results:
69#
70# I don't really care how time is reckoned so long as there is some
71# agreement about it, but I object to being told that I am saving
72# daylight when my reason tells me that I am doing nothing of the kind.
73# I even object to the implication that I am wasting something
74# valuable if I stay in bed after the sun has risen. As an admirer
75# of moonlight I resent the bossy insistence of those who want to

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185# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST)
186# Nome Standard Time (NT) Bering Standard Time (BST)
187#
188# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
189# The YST zone now covers nearly all of the state, AHST just part
190# of the Aleutian islands. No DST.
191
192# From Paul Eggert (1995-12-19):
68# Not everyone is happy with the results:
69#
70# I don't really care how time is reckoned so long as there is some
71# agreement about it, but I object to being told that I am saving
72# daylight when my reason tells me that I am doing nothing of the kind.
73# I even object to the implication that I am wasting something
74# valuable if I stay in bed after the sun has risen. As an admirer
75# of moonlight I resent the bossy insistence of those who want to

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185# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST)
186# Nome Standard Time (NT) Bering Standard Time (BST)
187#
188# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
189# The YST zone now covers nearly all of the state, AHST just part
190# of the Aleutian islands. No DST.
191
192# From Paul Eggert (1995-12-19):
193# The tables below use `NST', not `NT', for Nome Standard Time.
194# I invented `CAWT' for Central Alaska War Time.
193# The tables below use 'NST', not 'NT', for Nome Standard Time.
194# I invented 'CAWT' for Central Alaska War Time.
195
196# From U. S. Naval Observatory (1989-01-19):
197# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
198# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
199# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
200# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
201# USA MOUNTAIN 7 H BEHIND UTC DENVER
202# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30

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255# See the file "australasia".
256
257# From Arthur David Olson, 2005-08-09
258# The following was signed into law on 2005-08-08.
259#
260# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
261# (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15
262# U.S.C. 260a(a)) is amended--
195
196# From U. S. Naval Observatory (1989-01-19):
197# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
198# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
199# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
200# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
201# USA MOUNTAIN 7 H BEHIND UTC DENVER
202# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30

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255# See the file "australasia".
256
257# From Arthur David Olson, 2005-08-09
258# The following was signed into law on 2005-08-08.
259#
260# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
261# (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15
262# U.S.C. 260a(a)) is amended--
263# (1) by striking `first Sunday of April' and inserting `second
263# (1) by striking 'first Sunday of April' and inserting 'second
264# Sunday of March'; and
264# Sunday of March'; and
265# (2) by striking `last Sunday of October' and inserting `first
265# (2) by striking 'last Sunday of October' and inserting 'first
266# Sunday of November'.
267# (b) Effective Date- Subsection (a) shall take effect 1 year after the
268# date of enactment of this Act or March 1, 2007, whichever is later.
269# (c) Report to Congress- Not later than 9 months after the effective
270# date stated in subsection (b), the Secretary shall report to Congress
271# on the impact of this section on energy consumption in the United
272# States.
273# (d) Right to Revert- Congress retains the right to revert the

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618Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox
619 -10:30 - HST 1933 Apr 30 2:00 #Laws 1933
620 -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12
621 -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2
622 -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Cox+2
623 -10:30 - HST 1947 Jun 8 2:00 #Schmitt&Cox+2
624 -10:00 - HST
625
266# Sunday of November'.
267# (b) Effective Date- Subsection (a) shall take effect 1 year after the
268# date of enactment of this Act or March 1, 2007, whichever is later.
269# (c) Report to Congress- Not later than 9 months after the effective
270# date stated in subsection (b), the Secretary shall report to Congress
271# on the impact of this section on energy consumption in the United
272# States.
273# (d) Right to Revert- Congress retains the right to revert the

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618Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox
619 -10:30 - HST 1933 Apr 30 2:00 #Laws 1933
620 -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12
621 -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2
622 -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Cox+2
623 -10:30 - HST 1947 Jun 8 2:00 #Schmitt&Cox+2
624 -10:00 - HST
625
626Link Pacific/Honolulu Pacific/Johnston
627
626# Now we turn to US areas that have diverged from the consensus since 1970.
627
628# Arizona mostly uses MST.
629
630# From Paul Eggert (2002-10-20):
631#
632# The information in the rest of this paragraph is derived from the
633# <a href="http://www.dlapr.lib.az.us/links/daylight.htm">

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654 -7:00 US M%sT 1968 Mar 21
655 -7:00 - MST
656# From Arthur David Olson (1988-02-13):
657# A writer from the Inter Tribal Council of Arizona, Inc.,
658# notes in private correspondence dated 1987-12-28 that "Presently, only the
659# Navajo Nation participates in the Daylight Saving Time policy, due to its
660# large size and location in three states." (The "only" means that other
661# tribal nations don't use DST.)
628# Now we turn to US areas that have diverged from the consensus since 1970.
629
630# Arizona mostly uses MST.
631
632# From Paul Eggert (2002-10-20):
633#
634# The information in the rest of this paragraph is derived from the
635# <a href="http://www.dlapr.lib.az.us/links/daylight.htm">

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656 -7:00 US M%sT 1968 Mar 21
657 -7:00 - MST
658# From Arthur David Olson (1988-02-13):
659# A writer from the Inter Tribal Council of Arizona, Inc.,
660# notes in private correspondence dated 1987-12-28 that "Presently, only the
661# Navajo Nation participates in the Daylight Saving Time policy, due to its
662# large size and location in three states." (The "only" means that other
663# tribal nations don't use DST.)
664#
665# From Paul Eggert (2013-08-26):
666# See America/Denver for a zone appropriate for the Navajo Nation.
662
667
663Link America/Denver America/Shiprock
664
665# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
666# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
667# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
668# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
669# Teton, Twin Falls, Valley, Washington counties, and the southern
670# quarter of Idaho county) and eastern Oregon (most of Malheur County)
671# switched four weeks late in 1974.
672#

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695#
696# - Clark, Floyd, and Harrison counties have been like
697# America/Kentucky/Louisville.
698#
699# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
700# and Switzerland counties have their own time zone histories as noted below.
701#
702# Shanks partitioned Indiana into 345 regions, each with its own time history,
668# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
669# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
670# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
671# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
672# Teton, Twin Falls, Valley, Washington counties, and the southern
673# quarter of Idaho county) and eastern Oregon (most of Malheur County)
674# switched four weeks late in 1974.
675#

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698#
699# - Clark, Floyd, and Harrison counties have been like
700# America/Kentucky/Louisville.
701#
702# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
703# and Switzerland counties have their own time zone histories as noted below.
704#
705# Shanks partitioned Indiana into 345 regions, each with its own time history,
703# and wrote ``Even newspaper reports present contradictory information.''
706# and wrote "Even newspaper reports present contradictory information."
704# Those Hoosiers! Such a flighty and changeable people!
705# Fortunately, most of the complexity occurred before our cutoff date of 1970.
706#
707# Other than Indianapolis, the Indiana place names are so nondescript
707# Those Hoosiers! Such a flighty and changeable people!
708# Fortunately, most of the complexity occurred before our cutoff date of 1970.
709#
710# Other than Indianapolis, the Indiana place names are so nondescript
708# that they would be ambiguous if we left them at the `America' level.
709# So we reluctantly put them all in a subdirectory `America/Indiana'.
711# that they would be ambiguous if we left them at the 'America' level.
712# So we reluctantly put them all in a subdirectory 'America/Indiana'.
710
711# From Paul Eggert (2005-08-16):
712# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006.
713
714# From Nathan Stratton Treadway (2006-03-30):
715# http://www.dot.gov/affairs/dot0406.htm [3705 B]
716# From Deborah Goldsmith (2006-01-18):
717# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB]

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965# was rescinded and the city reverted to Sun time. A derisive offer to
966# erect a sundial in front of the city hall was referred to the
967# Committee on Sewers. Then, in 1905, Central time was adopted
968# by city vote.
969#
970# This story is too entertaining to be false, so go with Howse over Shanks.
971#
972# From Paul Eggert (2001-03-06):
713
714# From Paul Eggert (2005-08-16):
715# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006.
716
717# From Nathan Stratton Treadway (2006-03-30):
718# http://www.dot.gov/affairs/dot0406.htm [3705 B]
719# From Deborah Goldsmith (2006-01-18):
720# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB]

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968# was rescinded and the city reverted to Sun time. A derisive offer to
969# erect a sundial in front of the city hall was referred to the
970# Committee on Sewers. Then, in 1905, Central time was adopted
971# by city vote.
972#
973# This story is too entertaining to be false, so go with Howse over Shanks.
974#
975# From Paul Eggert (2001-03-06):
973# Garland (1927) writes ``Cleveland and Detroit advanced their clocks
974# one hour in 1914.'' This change is not in Shanks. We have no more
976# Garland (1927) writes "Cleveland and Detroit advanced their clocks
977# one hour in 1914." This change is not in Shanks. We have no more
975# info, so omit this for now.
976#
977# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
978# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
979Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
980Rule Detroit 1948 only - Sep lastSun 2:00 0 S
981Rule Detroit 1967 only - Jun 14 2:00 1:00 D
982Rule Detroit 1967 only - Oct lastSun 2:00 0 S

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1006
1007# Navassa
1008# administered by the US Fish and Wildlife Service
1009# claimed by US under the provisions of the 1856 Guano Islands Act
1010# also claimed by Haiti
1011# occupied 1857/1900 by the Navassa Phosphate Co
1012# US lighthouse 1917/1996-09
1013# currently uninhabited
978# info, so omit this for now.
979#
980# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
981# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
982Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
983Rule Detroit 1948 only - Sep lastSun 2:00 0 S
984Rule Detroit 1967 only - Jun 14 2:00 1:00 D
985Rule Detroit 1967 only - Oct lastSun 2:00 0 S

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1009
1010# Navassa
1011# administered by the US Fish and Wildlife Service
1012# claimed by US under the provisions of the 1856 Guano Islands Act
1013# also claimed by Haiti
1014# occupied 1857/1900 by the Navassa Phosphate Co
1015# US lighthouse 1917/1996-09
1016# currently uninhabited
1014# see Mark Fineman, ``An Isle Rich in Guano and Discord'',
1017# see Mark Fineman, "An Isle Rich in Guano and Discord",
1015# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
1016# Jimmy Skaggs, _The Great Guano Rush_ (1994).
1017
1018################################################################################
1019
1020
1021# From Paul Eggert (2006-03-22):
1022# A good source for time zone historical data outside the U.S. is

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1040#
1041# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf">
1042# William Willett, The Waste of Daylight, 19th edition
1043# </a> (1914-03)
1044#
1045# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
1046# <http://www.jstor.org/stable/1774359>.
1047#
1018# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
1019# Jimmy Skaggs, _The Great Guano Rush_ (1994).
1020
1021################################################################################
1022
1023
1024# From Paul Eggert (2006-03-22):
1025# A good source for time zone historical data outside the U.S. is

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1043#
1044# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf">
1045# William Willett, The Waste of Daylight, 19th edition
1046# </a> (1914-03)
1047#
1048# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
1049# <http://www.jstor.org/stable/1774359>.
1050#
1048# See the `europe' file for Greenland.
1051# See the 'europe' file for Greenland.
1049
1050# Canada
1051
1052# From Alain LaBont<e'> (1994-11-14):
1053# I post here the time zone abbreviations standardized in Canada
1054# for both English and French in the CAN/CSA-Z234.4-89 standard....
1055#
1056# UTC Standard time Daylight savings time

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1241 -3:30:52 StJohns N%sT 1935 Mar 30
1242 -3:30 StJohns N%sT 1942 May 11
1243 -3:30 Canada N%sT 1946
1244 -3:30 StJohns N%sT 2011 Nov
1245 -3:30 Canada N%sT
1246
1247# most of east Labrador
1248
1052
1053# Canada
1054
1055# From Alain LaBont<e'> (1994-11-14):
1056# I post here the time zone abbreviations standardized in Canada
1057# for both English and French in the CAN/CSA-Z234.4-89 standard....
1058#
1059# UTC Standard time Daylight savings time

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1244 -3:30:52 StJohns N%sT 1935 Mar 30
1245 -3:30 StJohns N%sT 1942 May 11
1246 -3:30 Canada N%sT 1946
1247 -3:30 StJohns N%sT 2011 Nov
1248 -3:30 Canada N%sT
1249
1250# most of east Labrador
1251
1249# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'.
1252# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1250# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1251Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
1252 -3:30:52 - NST 1918
1253 -3:30:52 Canada N%sT 1919
1254 -3:30:52 - NST 1935 Mar 30
1255 -3:30 - NST 1936
1256 -3:30 StJohns N%sT 1942 May 11
1257 -3:30 Canada N%sT 1946

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1358 -4:00 Canada A%sT 1946
1359 -4:00 Moncton A%sT 1973
1360 -4:00 Canada A%sT 1993
1361 -4:00 Moncton A%sT 2007
1362 -4:00 Canada A%sT
1363
1364# Quebec
1365
1253# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1254Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
1255 -3:30:52 - NST 1918
1256 -3:30:52 Canada N%sT 1919
1257 -3:30:52 - NST 1935 Mar 30
1258 -3:30 - NST 1936
1259 -3:30 StJohns N%sT 1942 May 11
1260 -3:30 Canada N%sT 1946

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1361 -4:00 Canada A%sT 1946
1362 -4:00 Moncton A%sT 1973
1363 -4:00 Canada A%sT 1993
1364 -4:00 Moncton A%sT 2007
1365 -4:00 Canada A%sT
1366
1367# Quebec
1368
1366# From Paul Eggert (2006-07-09):
1367# Shanks & Pottenger write that since 1970 most of Quebec has been
1368# like Montreal.
1369# From Paul Eggert (2013-08-30):
1370# Since 1970 most of Quebec has been like Toronto.
1371# However, because earlier versions of the tz database mistakenly relied on data
1372# from Shanks & Pottenger saying that Quebec differed from Ontario after 1970,
1373# a separate entry was created for most of Quebec. We're loath to lose
1374# its pre-1970 info, even though the tz database is normally limited to
1375# zones that differ after 1970, so keep this otherwise out-of-scope entry.
1369
1376
1370# From Paul Eggert (2006-06-27):
1371# Matthews and Vincent (1998) also write that Quebec east of the -63
1372# meridian is supposed to observe AST, but residents as far east as
1373# Natashquan use EST/EDT, and residents east of Natashquan use AST.
1377# Matthews and Vincent (1998) also write that Quebec east of the -63
1378# meridian is supposed to observe AST, but residents as far east as
1379# Natashquan use EST/EDT, and residents east of Natashquan use AST.
1374# In "Official time in Quebec" the Quebec department of justice writes in
1375# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm
1376# that "The residents of the Municipality of the
1377# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin,
1378# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is
1379# written and use Atlantic standard time all year round. The same applies to
1380# the residents of the Native facilities along the lower North Shore."
1381# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm>
1380# The Quebec department of justice writes in
1381# "The situation in Minganie and Basse-Cote-Nord"
1382# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1383# that the coastal strip from just east of Natashquan to Blanc-Sablon
1384# observes Atlantic standard time all year round.
1385# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1382# says this common practice was codified into law as of 2007.
1383# For lack of better info, guess this practice began around 1970, contra to
1384# Shanks & Pottenger who have this region observing AST/ADT.
1386# says this common practice was codified into law as of 2007.
1387# For lack of better info, guess this practice began around 1970, contra to
1388# Shanks & Pottenger who have this region observing AST/ADT.
1389# for post-1970 data America/Puerto_Rico.
1385
1386# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1387Rule Mont 1917 only - Mar 25 2:00 1:00 D
1388Rule Mont 1917 only - Apr 24 0:00 0 S
1389Rule Mont 1919 only - Mar 31 2:30 1:00 D
1390Rule Mont 1919 only - Oct 25 2:30 0 S
1391Rule Mont 1920 only - May 2 2:30 1:00 D
1392Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S

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1420Zone America/Montreal -4:54:16 - LMT 1884
1421 -5:00 Mont E%sT 1918
1422 -5:00 Canada E%sT 1919
1423 -5:00 Mont E%sT 1942 Feb 9 2:00s
1424 -5:00 Canada E%sT 1946
1425 -5:00 Mont E%sT 1974
1426 -5:00 Canada E%sT
1427
1390
1391# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1392Rule Mont 1917 only - Mar 25 2:00 1:00 D
1393Rule Mont 1917 only - Apr 24 0:00 0 S
1394Rule Mont 1919 only - Mar 31 2:30 1:00 D
1395Rule Mont 1919 only - Oct 25 2:30 0 S
1396Rule Mont 1920 only - May 2 2:30 1:00 D
1397Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S

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1425Zone America/Montreal -4:54:16 - LMT 1884
1426 -5:00 Mont E%sT 1918
1427 -5:00 Canada E%sT 1919
1428 -5:00 Mont E%sT 1942 Feb 9 2:00s
1429 -5:00 Canada E%sT 1946
1430 -5:00 Mont E%sT 1974
1431 -5:00 Canada E%sT
1432
1428
1429# Ontario
1430
1431# From Paul Eggert (2006-07-09):
1432# Shanks & Pottenger write that since 1970 most of Ontario has been like
1433# Toronto.
1434# Thunder Bay skipped DST in 1973.
1435# Many smaller locales did not observe peacetime DST until 1974;
1436# Nipigon (EST) and Rainy River (CST) are the largest that we know of.

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1639 -5:00 Toronto E%sT 1942 Feb 9 2:00s
1640 -5:00 Canada E%sT 1946
1641 -5:00 Toronto E%sT 1974
1642 -5:00 Canada E%sT
1643Zone America/Thunder_Bay -5:57:00 - LMT 1895
1644 -6:00 - CST 1910
1645 -5:00 - EST 1942
1646 -5:00 Canada E%sT 1970
1433# Ontario
1434
1435# From Paul Eggert (2006-07-09):
1436# Shanks & Pottenger write that since 1970 most of Ontario has been like
1437# Toronto.
1438# Thunder Bay skipped DST in 1973.
1439# Many smaller locales did not observe peacetime DST until 1974;
1440# Nipigon (EST) and Rainy River (CST) are the largest that we know of.

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1643 -5:00 Toronto E%sT 1942 Feb 9 2:00s
1644 -5:00 Canada E%sT 1946
1645 -5:00 Toronto E%sT 1974
1646 -5:00 Canada E%sT
1647Zone America/Thunder_Bay -5:57:00 - LMT 1895
1648 -6:00 - CST 1910
1649 -5:00 - EST 1942
1650 -5:00 Canada E%sT 1970
1647 -5:00 Mont E%sT 1973
1651 -5:00 Toronto E%sT 1973
1648 -5:00 - EST 1974
1649 -5:00 Canada E%sT
1650Zone America/Nipigon -5:53:04 - LMT 1895
1651 -5:00 Canada E%sT 1940 Sep 29
1652 -5:00 1:00 EDT 1942 Feb 9 2:00s
1653 -5:00 Canada E%sT
1654Zone America/Rainy_River -6:18:16 - LMT 1895
1655 -6:00 Canada C%sT 1940 Sep 29

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2226# General: GMT+6
2227#
2228# The Decree was published in Mexico's Official Newspaper on January 4th.
2229#
2230# -------------- End Forwarded Message --------------
2231# From Paul Eggert (1996-06-12):
2232# For an English translation of the decree, see
2233# <a href="http://mexico-travel.com/extra/timezone_eng.html">
1652 -5:00 - EST 1974
1653 -5:00 Canada E%sT
1654Zone America/Nipigon -5:53:04 - LMT 1895
1655 -5:00 Canada E%sT 1940 Sep 29
1656 -5:00 1:00 EDT 1942 Feb 9 2:00s
1657 -5:00 Canada E%sT
1658Zone America/Rainy_River -6:18:16 - LMT 1895
1659 -6:00 Canada C%sT 1940 Sep 29

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2230# General: GMT+6
2231#
2232# The Decree was published in Mexico's Official Newspaper on January 4th.
2233#
2234# -------------- End Forwarded Message --------------
2235# From Paul Eggert (1996-06-12):
2236# For an English translation of the decree, see
2237# <a href="http://mexico-travel.com/extra/timezone_eng.html">
2234# ``Diario Oficial: Time Zone Changeover'' (1996-01-04).
2238# "Diario Oficial: Time Zone Changeover" (1996-01-04).
2235# </a>
2236
2237# From Rives McDow (1998-10-08):
2238# The State of Quintana Roo has reverted back to central STD and DST times
2239# (i.e. UTC -0600 and -0500 as of 1998-08-02).
2240
2241# From Rives McDow (2000-01-10):
2242# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time

--- 320 unchanged lines hidden (view full) ---

2563# name or contents should be.
2564#
2565# Revillagigedo Is
2566# no information
2567
2568###############################################################################
2569
2570# Anguilla
2239# </a>
2240
2241# From Rives McDow (1998-10-08):
2242# The State of Quintana Roo has reverted back to central STD and DST times
2243# (i.e. UTC -0600 and -0500 as of 1998-08-02).
2244
2245# From Rives McDow (2000-01-10):
2246# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time

--- 320 unchanged lines hidden (view full) ---

2567# name or contents should be.
2568#
2569# Revillagigedo Is
2570# no information
2571
2572###############################################################################
2573
2574# Anguilla
2571# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2572Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2
2573 -4:00 - AST
2575# See 'southamerica'.
2574
2575# Antigua and Barbuda
2576# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2577Zone America/Antigua -4:07:12 - LMT 1912 Mar 2
2578 -5:00 - EST 1951
2579 -4:00 - AST
2580
2581# Bahamas

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2634# in March, until the first Sunday in November. And, after the Time Zone
2635# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2636# Friday, the same thing will happen in Bermuda.
2637# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2638
2639# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2640Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton
2641 -4:00 - AST 1974 Apr 28 2:00
2576
2577# Antigua and Barbuda
2578# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2579Zone America/Antigua -4:07:12 - LMT 1912 Mar 2
2580 -5:00 - EST 1951
2581 -4:00 - AST
2582
2583# Bahamas

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2636# in March, until the first Sunday in November. And, after the Time Zone
2637# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2638# Friday, the same thing will happen in Bermuda.
2639# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2640
2641# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2642Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton
2643 -4:00 - AST 1974 Apr 28 2:00
2642 -4:00 Bahamas A%sT 1976
2644 -4:00 Canada A%sT 1976
2643 -4:00 US A%sT
2644
2645# Cayman Is
2646# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2647Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown
2645 -4:00 US A%sT
2646
2647# Cayman Is
2648# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2649Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown
2648 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
2650 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
2649 -5:00 - EST
2650
2651# Costa Rica
2652
2653# Milne gives -5:36:13.3 as San Jose mean time; round to nearest.
2654
2655# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2656Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
2657Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
2658Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
2659# IATA SSIM (1991-09) says the following was at 1:00;
2660# go with Shanks & Pottenger.
2661Rule CR 1991 only - Jul 1 0:00 0 S
2662Rule CR 1992 only - Mar 15 0:00 0 S
2651 -5:00 - EST
2652
2653# Costa Rica
2654
2655# Milne gives -5:36:13.3 as San Jose mean time; round to nearest.
2656
2657# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2658Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
2659Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
2660Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
2661# IATA SSIM (1991-09) says the following was at 1:00;
2662# go with Shanks & Pottenger.
2663Rule CR 1991 only - Jul 1 0:00 0 S
2664Rule CR 1992 only - Mar 15 0:00 0 S
2663# There are too many San Joses elsewhere, so we'll use `Costa Rica'.
2665# There are too many San Joses elsewhere, so we'll use 'Costa Rica'.
2664# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2665Zone America/Costa_Rica -5:36:13 - LMT 1890 # San Jose
2666 -5:36:13 - SJMT 1921 Jan 15 # San Jose Mean Time
2667 -6:00 CR C%sT
2668# Coco
2669# no information; probably like America/Costa_Rica
2670
2671# Cuba

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2887Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D
2888
2889# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2890Zone America/Havana -5:29:28 - LMT 1890
2891 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT
2892 -5:00 Cuba C%sT
2893
2894# Dominica
2666# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2667Zone America/Costa_Rica -5:36:13 - LMT 1890 # San Jose
2668 -5:36:13 - SJMT 1921 Jan 15 # San Jose Mean Time
2669 -6:00 CR C%sT
2670# Coco
2671# no information; probably like America/Costa_Rica
2672
2673# Cuba

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2889Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D
2890
2891# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2892Zone America/Havana -5:29:28 - LMT 1890
2893 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT
2894 -5:00 Cuba C%sT
2895
2896# Dominica
2895# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2896Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau
2897 -4:00 - AST
2897# See 'southamerica'.
2898
2899# Dominican Republic
2900
2901# From Steffen Thorsen (2000-10-30):
2902# Enrique Morales reported to me that the Dominican Republic has changed the
2903# time zone to Eastern Standard Time as of Sunday 29 at 2 am....
2904# http://www.listin.com.do/antes/261000/republica/princi.html
2905

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2938Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
2939# There are too many San Salvadors elsewhere, so use America/El_Salvador
2940# instead of America/San_Salvador.
2941# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2942Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
2943 -6:00 Salv C%sT
2944
2945# Grenada
2898
2899# Dominican Republic
2900
2901# From Steffen Thorsen (2000-10-30):
2902# Enrique Morales reported to me that the Dominican Republic has changed the
2903# time zone to Eastern Standard Time as of Sunday 29 at 2 am....
2904# http://www.listin.com.do/antes/261000/republica/princi.html
2905

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2938Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
2939# There are too many San Salvadors elsewhere, so use America/El_Salvador
2940# instead of America/San_Salvador.
2941# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2942Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
2943 -6:00 Salv C%sT
2944
2945# Grenada
2946# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2947Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's
2948 -4:00 - AST
2949
2950# Guadeloupe
2946# Guadeloupe
2951# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2952Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre
2953 -4:00 - AST
2954# St Barthelemy
2947# St Barthelemy
2955Link America/Guadeloupe America/St_Barthelemy
2956# St Martin (French part)
2948# St Martin (French part)
2957Link America/Guadeloupe America/Marigot
2949# See 'southamerica'.
2958
2959# Guatemala
2960#
2961# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
2962# Diario Co Latino, at
2963# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079,
2964# says in an article dated 2006-04-19 that the Guatemalan government had
2965# decided on that date to advance official time by 60 minutes, to lessen the

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3092Rule Hond 2006 only - Aug Mon>=1 0:00 0 S
3093# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3094Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
3095 -6:00 Hond C%sT
3096#
3097# Great Swan I ceded by US to Honduras in 1972
3098
3099# Jamaica
2950
2951# Guatemala
2952#
2953# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
2954# Diario Co Latino, at
2955# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079,
2956# says in an article dated 2006-04-19 that the Guatemalan government had
2957# decided on that date to advance official time by 60 minutes, to lessen the

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3084Rule Hond 2006 only - Aug Mon>=1 0:00 0 S
3085# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3086Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
3087 -6:00 Hond C%sT
3088#
3089# Great Swan I ceded by US to Honduras in 1972
3090
3091# Jamaica
3100
3101# From Bob Devine (1988-01-28):
3102# Follows US rules.
3103
3104# From U. S. Naval Observatory (1989-01-19):
3105# JAMAICA 5 H BEHIND UTC
3106
3107# From Shanks & Pottenger:
3092# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3093# unspecified official document, and says "This time is used throughout the
3094# island". Go with Milne. Round to the nearest second as required by zic.
3108# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3095# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3109Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston
3110 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
3096Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston
3097 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
3111 -5:00 - EST 1974 Apr 28 2:00
3112 -5:00 US E%sT 1984
3113 -5:00 - EST
3114
3115# Martinique
3116# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3117Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
3118 -4:04:20 - FFMT 1911 May # Fort-de-France MT
3119 -4:00 - AST 1980 Apr 6
3120 -4:00 1:00 ADT 1980 Sep 28
3121 -4:00 - AST
3122
3123# Montserrat
3098 -5:00 - EST 1974 Apr 28 2:00
3099 -5:00 US E%sT 1984
3100 -5:00 - EST
3101
3102# Martinique
3103# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3104Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
3105 -4:04:20 - FFMT 1911 May # Fort-de-France MT
3106 -4:00 - AST 1980 Apr 6
3107 -4:00 1:00 ADT 1980 Sep 28
3108 -4:00 - AST
3109
3110# Montserrat
3124# From Paul Eggert (2006-03-22):
3125# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital.
3126# world.gazetteer.com says Cork Hill is the most populous location now.
3127# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3128Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill
3129 -4:00 - AST
3111# See 'southamerica'.
3130
3131# Nicaragua
3132#
3133# This uses Shanks & Pottenger for times before 2005.
3134#
3135# From Steffen Thorsen (2005-04-12):
3136# I've got reports from 8 different people that Nicaragua just started
3137# DST on Sunday 2005-04-10, in order to save energy because of

--- 57 unchanged lines hidden (view full) ---

3195
3196# Panama
3197# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3198Zone America/Panama -5:18:08 - LMT 1890
3199 -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time
3200 -5:00 - EST
3201
3202# Puerto Rico
3112
3113# Nicaragua
3114#
3115# This uses Shanks & Pottenger for times before 2005.
3116#
3117# From Steffen Thorsen (2005-04-12):
3118# I've got reports from 8 different people that Nicaragua just started
3119# DST on Sunday 2005-04-10, in order to save energy because of

--- 57 unchanged lines hidden (view full) ---

3177
3178# Panama
3179# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3180Zone America/Panama -5:18:08 - LMT 1890
3181 -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time
3182 -5:00 - EST
3183
3184# Puerto Rico
3203# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
3185# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'.
3204# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3205Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
3206 -4:00 - AST 1942 May 3
3207 -4:00 US A%sT 1946
3208 -4:00 - AST
3209
3210# St Kitts-Nevis
3186# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3187Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
3188 -4:00 - AST 1942 May 3
3189 -4:00 US A%sT 1946
3190 -4:00 - AST
3191
3192# St Kitts-Nevis
3211# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3212Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre
3213 -4:00 - AST
3214
3215# St Lucia
3193# St Lucia
3216# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3217Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries
3218 -4:04:00 - CMT 1912 # Castries Mean Time
3219 -4:00 - AST
3194# See 'southamerica'.
3220
3221# St Pierre and Miquelon
3195
3196# St Pierre and Miquelon
3222# There are too many St Pierres elsewhere, so we'll use `Miquelon'.
3197# There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
3223# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3224Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
3225 -4:00 - AST 1980 May
3226 -3:00 - PMST 1987 # Pierre & Miquelon Time
3227 -3:00 Canada PM%sT
3228
3229# St Vincent and the Grenadines
3198# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3199Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
3200 -4:00 - AST 1980 May
3201 -3:00 - PMST 1987 # Pierre & Miquelon Time
3202 -3:00 Canada PM%sT
3203
3204# St Vincent and the Grenadines
3230# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3231Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown
3232 -4:04:56 - KMT 1912 # Kingstown Mean Time
3233 -4:00 - AST
3205# See 'southamerica'.
3234
3235# Turks and Caicos
3236#
3237# From Chris Dunn in
3238# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007>
3239# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3240# daylight saving dates for time changes have been adjusted to match
3241# the recent U.S. change of dates.

--- 13 unchanged lines hidden (view full) ---

3255# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3256Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D
3257Rule TC 1979 2006 - Oct lastSun 2:00 0 S
3258Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D
3259Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D
3260Rule TC 2007 max - Nov Sun>=1 2:00 0 S
3261# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3262Zone America/Grand_Turk -4:44:32 - LMT 1890
3206
3207# Turks and Caicos
3208#
3209# From Chris Dunn in
3210# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007>
3211# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3212# daylight saving dates for time changes have been adjusted to match
3213# the recent U.S. change of dates.

--- 13 unchanged lines hidden (view full) ---

3227# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3228Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D
3229Rule TC 1979 2006 - Oct lastSun 2:00 0 S
3230Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D
3231Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D
3232Rule TC 2007 max - Nov Sun>=1 2:00 0 S
3233# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3234Zone America/Grand_Turk -4:44:32 - LMT 1890
3263 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
3235 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
3264 -5:00 TC E%sT
3265
3266# British Virgin Is
3236 -5:00 TC E%sT
3237
3238# British Virgin Is
3267# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3268Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town
3269 -4:00 - AST
3270
3271# Virgin Is
3239# Virgin Is
3272# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3273Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie
3274 -4:00 - AST
3240# See 'southamerica'.