1# @(#)northamerica 7.60
2# also includes Central America and the Caribbean
3
4# $FreeBSD: head/share/zoneinfo/northamerica 86222 2001-11-09 19:17:59Z wollman $
5
6# This data is by no means authoritative; if you think you know better,
7# go ahead and edit the file (and please send any changes to
8# tz@elsie.nci.nih.gov for general use in the future).
9
10# From Paul Eggert <eggert@twinsun.com> (1999-03-22):
11# A reliable and entertaining source about time zones is
12# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
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78# <a href="http://rowayton.org/rhs/hstaug45.html">:
79# "When the time is announced over the radio now, it is 'Eastern Peace
80# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
81# </a> (August 1945) by way of confirmation.
82
83# From Joseph Gallant <notquite@hotmail.com>, citing
84# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
85# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
86# to switch to London for Attlee's address, but the American people
87# never got to hear his speech live. According to one press account,
88# CBS' Bob Trout was first to announce the word of Japan's surrender,
89# but a few seconds later, NBC, ABC and Mutual also flashed the word
90# of surrender, all of whom interrupting the bells of Big Ben in
91# London which were to precede Mr. Attlee's speech.
92
93# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
94Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
95Rule US 1918 1919 - Oct lastSun 2:00 0 S
96Rule US 1942 only - Feb 9 2:00 1:00 W # War
97Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
98Rule US 1945 only - Sep 30 2:00 0 S
99Rule US 1967 max - Oct lastSun 2:00 0 S
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182# Shanks uses 1983-10-30, not 1983-11-30, for the 1983 transitions.
183# Go with Shanks.
184#
185# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
186# Public law 106-564 (2000-12-23) introduced the abbreviation
187# "Chamorro Standard Time" for time in Guam and the Northern Marianas.
188# See the file "australasia".
189
190# US eastern time, represented by New York
191
192# Connecticut, Delaware, District of Columbia, most of Florida,
193# Georgia, far southeastern Indiana, eastern Kentucky, Maine,
194# Maryland, Massachusetts, New Hampshire, New Jersey, New York, North
195# Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, eastern
196# Tennessee, Vermont, Virginia, West Virginia
197
198# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
199Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
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204# Zone NAME GMTOFF RULES FORMAT [UNTIL]
205Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:00
206 -5:00 US E%sT 1920
207 -5:00 NYC E%sT 1942
208 -5:00 US E%sT 1946
209 -5:00 NYC E%sT 1967
210 -5:00 US E%sT
211
212# US central time, represented by Chicago
213
214# Alabama, Arkansas, Florida panhandle, Illinois, western Indiana
215# corners, Iowa, most of Kansas, western Kentucky, Louisiana,
216# Minnesota, Mississippi, Missouri, eastern Nebraska, eastern North
217# Dakota, Oklahoma, eastern South Dakota, western Tennessee, most of
218# Texas, Wisconsin
219
220# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
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228Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00
229 -6:00 US C%sT 1920
230 -6:00 Chicago C%sT 1936 Mar 1 2:00
231 -5:00 - EST 1936 Nov 15 2:00
232 -6:00 Chicago C%sT 1942
233 -6:00 US C%sT 1946
234 -6:00 Chicago C%sT 1967
235 -6:00 US C%sT
236# Oliver County, ND switched from mountain to central time on 1992-10-25.
237Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:00
238 -7:00 US M%sT 1992 Oct 25 02:00
239 -6:00 US C%sT
240
241# US mountain time, represented by Denver
242#
243# Colorado, southern Idaho, far western Kansas, Montana, western
244# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
245# New Mexico, southwestern North Dakota, far eastern Oregon,
246# western South Dakota, far western Texas (El Paso County, Hudspeth County,
247# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
248#
249# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
250Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
251Rule Denver 1920 only - Oct lastSun 2:00 0 S
252Rule Denver 1921 only - May 22 2:00 0 S
253Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
254Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
255# Zone NAME GMTOFF RULES FORMAT [UNTIL]
256Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00
257 -7:00 US M%sT 1920
258 -7:00 Denver M%sT 1942
259 -7:00 US M%sT 1946
260 -7:00 Denver M%sT 1967
261 -7:00 US M%sT
262
263# US Pacific time, represented by Los Angeles
264#
265# California, northern Idaho, most of Nevada, most of Oregon, and Washington
266#
267# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
268Rule CA 1948 only - Mar 14 2:00 1:00 D
269Rule CA 1949 only - Jan 1 2:00 0 S
270Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D
271Rule CA 1950 1961 - Sep lastSun 2:00 0 S
272Rule CA 1962 1966 - Oct lastSun 2:00 0 S
273# Zone NAME GMTOFF RULES FORMAT [UNTIL]
274Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:00
275 -8:00 US P%sT 1946
276 -8:00 CA P%sT 1967
277 -8:00 US P%sT
278
279# Alaska
280# AK%sT is the modern abbreviation for -9:00 per USNO.
281#
282# From Paul Eggert (2001-05-30):
283# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
284# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
285# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
286# also a Friday. Include only the time zone part of this transition,
287# ignoring the switch from Julian to Gregorian, since we can't represent
288# the Julian calendar.
289#
290# As far as we know, none of the exact locations mentioned below were
291# permanently inhabited in 1867 by anyone using either calendar.
292# (Yakutat was colonized by the Russians in 1799, but the settlement
293# was destroyed in 1805 by a Yakutat-kon war party.) However, there
294# were nearby inhabitants in some cases and for our purposes perhaps
295# it's best to simply use the official transition.
296#
297# Zone NAME GMTOFF RULES FORMAT [UNTIL]
298Zone America/Juneau 15:02:19 - LMT 1867 Oct 18
299 -8:57:41 - LMT 1900 Aug 20 12:00
300 -8:00 - PST 1942
301 -8:00 US P%sT 1946
302 -8:00 - PST 1969
303 -8:00 US P%sT 1983 Oct 30 2:00
304 -9:00 US AK%sT
--- 103 unchanged lines hidden (view full) ---
408# So we reluctantly put them all in a subdirectory `America/Indiana'.
409#
410# Most of EST-only Indiana last observed DST in 1970.
411
412# From Paul Eggert (2001-03-06), following a tip by Markus Kuhn:
413# Pam Belluck reported in the New York Times (2001-01-31) that the
414# Indiana Legislature is considering a bill to adopt DST statewide.
415# Her article mentioned Vevay, whose post office observes a different
416# time zone from Danner's Hardware across the street.
417
418# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
419Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
420Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
421Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
422# Zone NAME GMTOFF RULES FORMAT [UNTIL]
423Zone America/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:00
424 -6:00 US C%sT 1920
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512# The three Lake Cumberland counties are the farthest east of any U.S.
513# location in the Central time zone.
514#
515# From Rich Wales (2000-08-29):
516# After prolonged debate, and despite continuing deep differences of opinion,
517# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
518# (-0500) time. They won't "fall back" this year. See Sara Shipley,
519# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
520#
521# From Paul Eggert (2001-07-16):
522# The final rule was published in the
523# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22">
524# Federal Register 65, 160 (2000-08-17), page 50154-50158.
525# </a>
526#
527Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00
528 -6:00 US C%sT 1946
529 -6:00 - CST 1968
530 -6:00 US C%sT 2000 Oct 29 2:00
531 -5:00 US E%sT
532
533
534# From Rives McDow (2000-08-30):
535# Here ... are all the changes in the US since 1985.
536# Kearny County, KS (put all of county on central;
537# previously split between MST and CST) ... 1990-10
538# Starke County, IN (from CST to EST) ... 1991-10
539# Oliver County, ND (from MST to CST) ... 1992-10
540# West Wendover, NV (from PST TO MST) ... 1999-10
541# Wayne County, KY (from CST to EST) ... 2000-10
542#
543# From Paul Eggert (2001-07-17):
544# We don't know where the line used to be within Kearny County, KS,
545# so omit that change for now.
546# See America/Indiana/Knox for the Starke County, IN change.
547# See America/North_Dakota/Center for the Oliver County, ND change.
548# West Wendover, NV officially switched from Pacific to mountain time on
549# 1999-10-31. See the
550# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15">
551# Federal Register 64, 203 (1999-10-21), page 56705-56707.
552# </a>
553# However, the Federal Register says that West Wendover already operated
554# on mountain time, and the rule merely made this official;
555# hence a separate tz entry is not needed.
556
557# Michigan
558#
559# From Bob Devine (1988-01-28):
560# Michigan didn't observe DST from 1968 to 1973.
561#
562# From Paul Eggert (1999-03-31):
563# Shanks writes that Michigan started using standard time on 1885-09-18,
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604# Zone NAME GMTOFF RULES FORMAT [UNTIL]
605Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
606 -6:00 US C%sT 1946
607 -6:00 Menominee C%sT 1969 Apr 27 2:00
608 -5:00 - EST 1973 Apr 29 2:00
609 -6:00 US C%sT
610
611# Navassa
612# administered by the US Fish and Wildlife Service
613# claimed by US under the provisions of the 1856 Guano Islands Act
614# also claimed by Haiti
615# occupied 1857/1900 by the Navassa Phosphate Co
616# US lighthouse 1917/1996-09
617# currently uninhabited
618# see Mark Fineman, ``An Isle Rich in Guano and Discord'',
619# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
620# Jimmy Skaggs, _The Great Guano Rush_ (1994).
621
622# Old names, for S5 users
623
624# Link LINK-FROM LINK-TO
--- 8 unchanged lines hidden (view full) ---
633################################################################################
634
635
636# From Paul Eggert <eggert@twinsun.com> (1999-10-29):
637# A good source for time zone historical data outside the US is
638# Thomas G. Shanks, The International Atlas (5th edition),
639# San Diego: ACS Publications, Inc. (1999).
640#
641# Gwillim Law writes that a good source
642# for recent time zone data is the International Air Transport
643# Association's Standard Schedules Information Manual (IATA SSIM),
644# published semiannually. Law sent in several helpful summaries
645# of the IATA's data after 1990.
646#
647# Except where otherwise noted, Shanks is the source for entries through 1990,
648# and IATA SSIM is the source for entries after 1990.
649#
--- 442 unchanged lines hidden (view full) ---
1092#
1093# From Antoine Leca (1999-09-06):
1094# We then need to create a new timezone for the Kitikmeot region of Nunavut
1095# to differentiate it from the Yellowknife region.
1096
1097# From Paul Eggert (1999-09-20):
1098# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html">
1099# Basic Facts: The New Territory
1100# </a> (1999) reports that Pangnirtung operates on eastern time,
1101# and that Coral Harbour does not observe DST. We don't know when
1102# Pangnirtung switched to eastern time; we'll guess 1995.
1103# We'll ignore the claim about Coral Harbour for now,
1104# since we have no further info.
1105
1106# From Rives McDow (1999-11-08):
1107# On October 31, when the rest of Nunavut went to Central time,
1108# Pangnirtung wobbled. Here is the result of their wobble:
1109#
1110# The following businesses and organizations in Pangnirtung use Central Time:
--- 238 unchanged lines hidden (view full) ---
1349# saving. The modification reverts this to only cover Baja California
1350# (Norte), while all other states (except Sonora, who has no daylight
1351# saving all year) will follow the original decree of president
1352# Vicente Fox, starting daylight saving May 6, 2001 and ending
1353# September 30, 2001.
1354# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp>
1355# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
1356
1357# From Reuters (2001-09-04):
1358# Mexico's Supreme Court on Tuesday declared that daylight savings was
1359# unconstitutional in Mexico City, creating the possibility the
1360# capital will be in a different time zone from the rest of the nation
1361# next year.... The Supreme Court's ruling takes effect at 2:00
1362# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
1363# standard time. "This is so residents of the Federal District are not
1364# subject to unexpected time changes," a statement from the court said.
1365
1366# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1367Rule Mexico 1939 only - Feb 5 0:00 1:00 D
1368Rule Mexico 1939 only - Jun 25 0:00 0 S
1369Rule Mexico 1940 only - Dec 9 0:00 1:00 D
1370Rule Mexico 1941 only - Apr 1 0:00 0 S
1371Rule Mexico 1943 only - Dec 16 0:00 1:00 W
1372Rule Mexico 1944 only - May 1 0:00 0 S
1373Rule Mexico 1950 only - Feb 12 0:00 1:00 D
--- 20 unchanged lines hidden (view full) ---
1394 -6:00 Mexico C%sT
1395# Central Mexico
1396Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
1397 -7:00 - MST 1927 Jun 10 23:00
1398 -6:00 - CST 1930 Nov 15
1399 -7:00 - MST 1931 May 1 23:00
1400 -6:00 - CST 1931 Oct
1401 -7:00 - MST 1932 Apr 1
1402 -6:00 Mexico C%sT 2001 Sep 30 02:00
1403 -6:00 - CST
1404# Chihuahua
1405Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
1406 -7:00 - MST 1927 Jun 10 23:00
1407 -6:00 - CST 1930 Nov 15
1408 -7:00 - MST 1931 May 1 23:00
1409 -6:00 - CST 1931 Oct
1410 -7:00 - MST 1932 Apr 1
1411 -6:00 - CST 1996
--- 284 unchanged lines hidden (view full) ---
1696 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
1697 -5:00 - EST 1974 Apr 28 2:00
1698 -5:00 US E%sT 1984
1699 -5:00 - EST
1700
1701# Martinique
1702# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1703Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
1704 -4:04:20 - FFMT 1911 May # Fort-de-France MT
1705 -4:00 - AST 1980 Apr 6
1706 -4:00 1:00 ADT 1980 Sep 28
1707 -4:00 - AST
1708
1709# Montserrat
1710# From Paul Eggert (1997-08-31):
1711# Recent volcanic eruptions have forced evacuation of Plymouth, the capital.
1712# Luckily, Olveston, the current de facto capital, has the same longitude.
--- 9 unchanged lines hidden (view full) ---
1722#
1723# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1724Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
1725Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
1726Rule Nic 1992 only - Jan 1 4:00 1:00 D
1727Rule Nic 1992 only - Sep 24 0:00 0 S
1728# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1729Zone America/Managua -5:45:08 - LMT 1890
1730 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?
1731 -6:00 - CST 1973 May
1732 -5:00 - EST 1975 Feb 16
1733 -6:00 Nic C%sT 1993 Jan 1 4:00
1734 -5:00 - EST 1998 Dec
1735 -6:00 - CST
1736
1737# Panama
1738# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1739Zone America/Panama -5:18:08 - LMT 1890
1740 -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time
1741 -5:00 - EST
1742
1743# Puerto Rico
1744# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
1745# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1746Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
1747 -4:00 - AST 1942 May 3
1748 -4:00 1:00 AWT 1945 Sep 30 2:00
1749 -4:00 - AST
1750
1751# St Kitts-Nevis
1752# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1753Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre
1754 -4:00 - AST
1755
1756# St Lucia
1757# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1758Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries
1759 -4:04:00 - CMT 1912 # Castries Mean Time
1760 -4:00 - AST
1761
1762# St Pierre and Miquelon
1763# There are too many St Pierres elsewhere, so we'll use `Miquelon'.
1764# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1765Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
1766 -4:00 - AST 1980 May
1767 -3:00 Mont PM%sT # Pierre & Miquelon Time
--- 29 unchanged lines hidden ---
2# also includes Central America and the Caribbean
3
4# $FreeBSD: head/share/zoneinfo/northamerica 86222 2001-11-09 19:17:59Z wollman $
5
6# This data is by no means authoritative; if you think you know better,
7# go ahead and edit the file (and please send any changes to
8# tz@elsie.nci.nih.gov for general use in the future).
9
10# From Paul Eggert <eggert@twinsun.com> (1999-03-22):
11# A reliable and entertaining source about time zones is
12# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
--- 65 unchanged lines hidden (view full) ---
78# <a href="http://rowayton.org/rhs/hstaug45.html">:
79# "When the time is announced over the radio now, it is 'Eastern Peace
80# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
81# </a> (August 1945) by way of confirmation.
82
83# From Joseph Gallant <notquite@hotmail.com>, citing
84# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
85# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
86# to switch to London for Attlee's address, but the American people
87# never got to hear his speech live. According to one press account,
88# CBS' Bob Trout was first to announce the word of Japan's surrender,
89# but a few seconds later, NBC, ABC and Mutual also flashed the word
90# of surrender, all of whom interrupting the bells of Big Ben in
91# London which were to precede Mr. Attlee's speech.
92
93# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
94Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
95Rule US 1918 1919 - Oct lastSun 2:00 0 S
96Rule US 1942 only - Feb 9 2:00 1:00 W # War
97Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
98Rule US 1945 only - Sep 30 2:00 0 S
99Rule US 1967 max - Oct lastSun 2:00 0 S
--- 82 unchanged lines hidden (view full) ---
182# Shanks uses 1983-10-30, not 1983-11-30, for the 1983 transitions.
183# Go with Shanks.
184#
185# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
186# Public law 106-564 (2000-12-23) introduced the abbreviation
187# "Chamorro Standard Time" for time in Guam and the Northern Marianas.
188# See the file "australasia".
189
190# US eastern time, represented by New York
191
192# Connecticut, Delaware, District of Columbia, most of Florida,
193# Georgia, far southeastern Indiana, eastern Kentucky, Maine,
194# Maryland, Massachusetts, New Hampshire, New Jersey, New York, North
195# Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, eastern
196# Tennessee, Vermont, Virginia, West Virginia
197
198# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
199Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
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204# Zone NAME GMTOFF RULES FORMAT [UNTIL]
205Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:00
206 -5:00 US E%sT 1920
207 -5:00 NYC E%sT 1942
208 -5:00 US E%sT 1946
209 -5:00 NYC E%sT 1967
210 -5:00 US E%sT
211
212# US central time, represented by Chicago
213
214# Alabama, Arkansas, Florida panhandle, Illinois, western Indiana
215# corners, Iowa, most of Kansas, western Kentucky, Louisiana,
216# Minnesota, Mississippi, Missouri, eastern Nebraska, eastern North
217# Dakota, Oklahoma, eastern South Dakota, western Tennessee, most of
218# Texas, Wisconsin
219
220# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
--- 7 unchanged lines hidden (view full) ---
228Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00
229 -6:00 US C%sT 1920
230 -6:00 Chicago C%sT 1936 Mar 1 2:00
231 -5:00 - EST 1936 Nov 15 2:00
232 -6:00 Chicago C%sT 1942
233 -6:00 US C%sT 1946
234 -6:00 Chicago C%sT 1967
235 -6:00 US C%sT
236# Oliver County, ND switched from mountain to central time on 1992-10-25.
237Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:00
238 -7:00 US M%sT 1992 Oct 25 02:00
239 -6:00 US C%sT
240
241# US mountain time, represented by Denver
242#
243# Colorado, southern Idaho, far western Kansas, Montana, western
244# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
245# New Mexico, southwestern North Dakota, far eastern Oregon,
246# western South Dakota, far western Texas (El Paso County, Hudspeth County,
247# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
248#
249# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
250Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
251Rule Denver 1920 only - Oct lastSun 2:00 0 S
252Rule Denver 1921 only - May 22 2:00 0 S
253Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
254Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
255# Zone NAME GMTOFF RULES FORMAT [UNTIL]
256Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00
257 -7:00 US M%sT 1920
258 -7:00 Denver M%sT 1942
259 -7:00 US M%sT 1946
260 -7:00 Denver M%sT 1967
261 -7:00 US M%sT
262
263# US Pacific time, represented by Los Angeles
264#
265# California, northern Idaho, most of Nevada, most of Oregon, and Washington
266#
267# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
268Rule CA 1948 only - Mar 14 2:00 1:00 D
269Rule CA 1949 only - Jan 1 2:00 0 S
270Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D
271Rule CA 1950 1961 - Sep lastSun 2:00 0 S
272Rule CA 1962 1966 - Oct lastSun 2:00 0 S
273# Zone NAME GMTOFF RULES FORMAT [UNTIL]
274Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:00
275 -8:00 US P%sT 1946
276 -8:00 CA P%sT 1967
277 -8:00 US P%sT
278
279# Alaska
280# AK%sT is the modern abbreviation for -9:00 per USNO.
281#
282# From Paul Eggert (2001-05-30):
283# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
284# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
285# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
286# also a Friday. Include only the time zone part of this transition,
287# ignoring the switch from Julian to Gregorian, since we can't represent
288# the Julian calendar.
289#
290# As far as we know, none of the exact locations mentioned below were
291# permanently inhabited in 1867 by anyone using either calendar.
292# (Yakutat was colonized by the Russians in 1799, but the settlement
293# was destroyed in 1805 by a Yakutat-kon war party.) However, there
294# were nearby inhabitants in some cases and for our purposes perhaps
295# it's best to simply use the official transition.
296#
297# Zone NAME GMTOFF RULES FORMAT [UNTIL]
298Zone America/Juneau 15:02:19 - LMT 1867 Oct 18
299 -8:57:41 - LMT 1900 Aug 20 12:00
300 -8:00 - PST 1942
301 -8:00 US P%sT 1946
302 -8:00 - PST 1969
303 -8:00 US P%sT 1983 Oct 30 2:00
304 -9:00 US AK%sT
--- 103 unchanged lines hidden (view full) ---
408# So we reluctantly put them all in a subdirectory `America/Indiana'.
409#
410# Most of EST-only Indiana last observed DST in 1970.
411
412# From Paul Eggert (2001-03-06), following a tip by Markus Kuhn:
413# Pam Belluck reported in the New York Times (2001-01-31) that the
414# Indiana Legislature is considering a bill to adopt DST statewide.
415# Her article mentioned Vevay, whose post office observes a different
416# time zone from Danner's Hardware across the street.
417
418# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
419Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
420Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
421Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
422# Zone NAME GMTOFF RULES FORMAT [UNTIL]
423Zone America/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:00
424 -6:00 US C%sT 1920
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512# The three Lake Cumberland counties are the farthest east of any U.S.
513# location in the Central time zone.
514#
515# From Rich Wales (2000-08-29):
516# After prolonged debate, and despite continuing deep differences of opinion,
517# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
518# (-0500) time. They won't "fall back" this year. See Sara Shipley,
519# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
520#
521# From Paul Eggert (2001-07-16):
522# The final rule was published in the
523# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22">
524# Federal Register 65, 160 (2000-08-17), page 50154-50158.
525# </a>
526#
527Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00
528 -6:00 US C%sT 1946
529 -6:00 - CST 1968
530 -6:00 US C%sT 2000 Oct 29 2:00
531 -5:00 US E%sT
532
533
534# From Rives McDow (2000-08-30):
535# Here ... are all the changes in the US since 1985.
536# Kearny County, KS (put all of county on central;
537# previously split between MST and CST) ... 1990-10
538# Starke County, IN (from CST to EST) ... 1991-10
539# Oliver County, ND (from MST to CST) ... 1992-10
540# West Wendover, NV (from PST TO MST) ... 1999-10
541# Wayne County, KY (from CST to EST) ... 2000-10
542#
543# From Paul Eggert (2001-07-17):
544# We don't know where the line used to be within Kearny County, KS,
545# so omit that change for now.
546# See America/Indiana/Knox for the Starke County, IN change.
547# See America/North_Dakota/Center for the Oliver County, ND change.
548# West Wendover, NV officially switched from Pacific to mountain time on
549# 1999-10-31. See the
550# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15">
551# Federal Register 64, 203 (1999-10-21), page 56705-56707.
552# </a>
553# However, the Federal Register says that West Wendover already operated
554# on mountain time, and the rule merely made this official;
555# hence a separate tz entry is not needed.
556
557# Michigan
558#
559# From Bob Devine (1988-01-28):
560# Michigan didn't observe DST from 1968 to 1973.
561#
562# From Paul Eggert (1999-03-31):
563# Shanks writes that Michigan started using standard time on 1885-09-18,
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604# Zone NAME GMTOFF RULES FORMAT [UNTIL]
605Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
606 -6:00 US C%sT 1946
607 -6:00 Menominee C%sT 1969 Apr 27 2:00
608 -5:00 - EST 1973 Apr 29 2:00
609 -6:00 US C%sT
610
611# Navassa
612# administered by the US Fish and Wildlife Service
613# claimed by US under the provisions of the 1856 Guano Islands Act
614# also claimed by Haiti
615# occupied 1857/1900 by the Navassa Phosphate Co
616# US lighthouse 1917/1996-09
617# currently uninhabited
618# see Mark Fineman, ``An Isle Rich in Guano and Discord'',
619# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
620# Jimmy Skaggs, _The Great Guano Rush_ (1994).
621
622# Old names, for S5 users
623
624# Link LINK-FROM LINK-TO
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633################################################################################
634
635
636# From Paul Eggert <eggert@twinsun.com> (1999-10-29):
637# A good source for time zone historical data outside the US is
638# Thomas G. Shanks, The International Atlas (5th edition),
639# San Diego: ACS Publications, Inc. (1999).
640#
641# Gwillim Law writes that a good source
642# for recent time zone data is the International Air Transport
643# Association's Standard Schedules Information Manual (IATA SSIM),
644# published semiannually. Law sent in several helpful summaries
645# of the IATA's data after 1990.
646#
647# Except where otherwise noted, Shanks is the source for entries through 1990,
648# and IATA SSIM is the source for entries after 1990.
649#
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1092#
1093# From Antoine Leca (1999-09-06):
1094# We then need to create a new timezone for the Kitikmeot region of Nunavut
1095# to differentiate it from the Yellowknife region.
1096
1097# From Paul Eggert (1999-09-20):
1098# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html">
1099# Basic Facts: The New Territory
1100# </a> (1999) reports that Pangnirtung operates on eastern time,
1101# and that Coral Harbour does not observe DST. We don't know when
1102# Pangnirtung switched to eastern time; we'll guess 1995.
1103# We'll ignore the claim about Coral Harbour for now,
1104# since we have no further info.
1105
1106# From Rives McDow (1999-11-08):
1107# On October 31, when the rest of Nunavut went to Central time,
1108# Pangnirtung wobbled. Here is the result of their wobble:
1109#
1110# The following businesses and organizations in Pangnirtung use Central Time:
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1349# saving. The modification reverts this to only cover Baja California
1350# (Norte), while all other states (except Sonora, who has no daylight
1351# saving all year) will follow the original decree of president
1352# Vicente Fox, starting daylight saving May 6, 2001 and ending
1353# September 30, 2001.
1354# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp>
1355# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
1356
1357# From Reuters (2001-09-04):
1358# Mexico's Supreme Court on Tuesday declared that daylight savings was
1359# unconstitutional in Mexico City, creating the possibility the
1360# capital will be in a different time zone from the rest of the nation
1361# next year.... The Supreme Court's ruling takes effect at 2:00
1362# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
1363# standard time. "This is so residents of the Federal District are not
1364# subject to unexpected time changes," a statement from the court said.
1365
1366# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1367Rule Mexico 1939 only - Feb 5 0:00 1:00 D
1368Rule Mexico 1939 only - Jun 25 0:00 0 S
1369Rule Mexico 1940 only - Dec 9 0:00 1:00 D
1370Rule Mexico 1941 only - Apr 1 0:00 0 S
1371Rule Mexico 1943 only - Dec 16 0:00 1:00 W
1372Rule Mexico 1944 only - May 1 0:00 0 S
1373Rule Mexico 1950 only - Feb 12 0:00 1:00 D
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1394 -6:00 Mexico C%sT
1395# Central Mexico
1396Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
1397 -7:00 - MST 1927 Jun 10 23:00
1398 -6:00 - CST 1930 Nov 15
1399 -7:00 - MST 1931 May 1 23:00
1400 -6:00 - CST 1931 Oct
1401 -7:00 - MST 1932 Apr 1
1402 -6:00 Mexico C%sT 2001 Sep 30 02:00
1403 -6:00 - CST
1404# Chihuahua
1405Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
1406 -7:00 - MST 1927 Jun 10 23:00
1407 -6:00 - CST 1930 Nov 15
1408 -7:00 - MST 1931 May 1 23:00
1409 -6:00 - CST 1931 Oct
1410 -7:00 - MST 1932 Apr 1
1411 -6:00 - CST 1996
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1696 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
1697 -5:00 - EST 1974 Apr 28 2:00
1698 -5:00 US E%sT 1984
1699 -5:00 - EST
1700
1701# Martinique
1702# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1703Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
1704 -4:04:20 - FFMT 1911 May # Fort-de-France MT
1705 -4:00 - AST 1980 Apr 6
1706 -4:00 1:00 ADT 1980 Sep 28
1707 -4:00 - AST
1708
1709# Montserrat
1710# From Paul Eggert (1997-08-31):
1711# Recent volcanic eruptions have forced evacuation of Plymouth, the capital.
1712# Luckily, Olveston, the current de facto capital, has the same longitude.
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1722#
1723# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1724Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
1725Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
1726Rule Nic 1992 only - Jan 1 4:00 1:00 D
1727Rule Nic 1992 only - Sep 24 0:00 0 S
1728# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1729Zone America/Managua -5:45:08 - LMT 1890
1730 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?
1731 -6:00 - CST 1973 May
1732 -5:00 - EST 1975 Feb 16
1733 -6:00 Nic C%sT 1993 Jan 1 4:00
1734 -5:00 - EST 1998 Dec
1735 -6:00 - CST
1736
1737# Panama
1738# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1739Zone America/Panama -5:18:08 - LMT 1890
1740 -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time
1741 -5:00 - EST
1742
1743# Puerto Rico
1744# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
1745# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1746Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
1747 -4:00 - AST 1942 May 3
1748 -4:00 1:00 AWT 1945 Sep 30 2:00
1749 -4:00 - AST
1750
1751# St Kitts-Nevis
1752# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1753Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre
1754 -4:00 - AST
1755
1756# St Lucia
1757# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1758Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries
1759 -4:04:00 - CMT 1912 # Castries Mean Time
1760 -4:00 - AST
1761
1762# St Pierre and Miquelon
1763# There are too many St Pierres elsewhere, so we'll use `Miquelon'.
1764# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1765Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
1766 -4:00 - AST 1980 May
1767 -3:00 Mont PM%sT # Pierre & Miquelon Time
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