-# @(#)northamerica 7.61
+# @(#)northamerica 8.18
+# <pre>
+
# also includes Central America and the Caribbean
# 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> (1999-03-22):
+# From Paul Eggert (1999-03-22):
# A reliable and entertaining source about time zones is
# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
# His proposal was adopted by the railroads on 1883-11-18 at 12:00,
# and the most of the country soon followed suit.
-# From Paul Eggert <eggert@twinsun.com> (1995-12-19):
+# From Paul Eggert (2005-04-16):
+# That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
+# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
+
+# From Paul Eggert (2006-03-22):
# 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.
+# It is the source for most of the pre-1991 US entries below.
# From Paul Eggert (2001-03-06):
# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
# to push people into bed earlier, and get them up earlier, to make
# them healthy, wealthy and wise in spite of themselves.
#
-# -- Robertson Davies, The Diary of Samuel Marchbanks (1947), XIX, Sunday
+# -- Robertson Davies, The diary of Samuel Marchbanks,
+# Clarke, Irwin (1947), XIX, Sunday
#
# For more about the first ten years of DST in the United States, see
# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html">
# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
# </a> (August 1945) by way of confirmation.
-# From Joseph Gallant <notquite@hotmail.com>, citing
+# From Joseph Gallant citing
# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
# to switch to London for Attlee's address, but the American people
# of surrender, all of whom interrupting the bells of Big Ben in
# London which were to precede Mr. Attlee's speech.
+# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From
+# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
+#
+# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
+# Any announcement from Asia would reach St. John's New York newsroom on a
+# wire service teletype machine, which had prescribed signals for major news.
+# Associated Press, for example, would ring five bells before spewing out
+# typed copy of an important story, and 10 bells for news "of transcendental
+# importance."
+#
+# On Aug. 14, stalling while talking steadily into the NBC networks' open
+# microphone, St. John heard five bells and waited only to hear a sixth bell,
+# before announcing confidently: "Ladies and gentlemen, World War II is over.
+# The Japanese have agreed to our surrender terms."
+#
+# He had scored a 20-second scoop on other broadcasters.
+
+# From Arthur David Olson (2005-08-22):
+# Paul has been careful to use the "US" rules only in those locations
+# that are part of the United States; this reflects the real scope of
+# U.S. government action. So even though the "US" rules have changed
+# in the latest release, other countries won't be affected.
+
# 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 - Oct lastSun 2:00 0 S
Rule US 1942 only - Feb 9 2:00 1:00 W # War
Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
Rule US 1945 only - Sep 30 2:00 0 S
-Rule US 1967 max - Oct lastSun 2:00 0 S
+Rule US 1967 2006 - Oct lastSun 2:00 0 S
Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
Rule US 1974 only - Jan 6 2:00 1:00 D
Rule US 1975 only - Feb 23 2:00 1:00 D
Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
-Rule US 1987 max - Apr Sun>=1 2:00 1:00 D
-# <a href="http://thomas.loc.gov/cgi-bin/bdquery/z?d106:h.r.00177:">
-# H.R.177
-# </a> (introduced 1999-01-06) would change April to March in the above rule.
+Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D
+Rule US 2007 max - Mar Sun>=8 2:00 1:00 D
+Rule US 2007 max - Nov Sun>=1 2:00 0 S
+
+# From Arthur David Olson, 2005-12-19
+# We generate the files specified below to guard against old files with
+# obsolete information being left in the time zone binary directory.
+# We limit the list to names that have appeared in previous versions of
+# this time zone package.
+# We do these as separate Zones rather than as Links to avoid problems if
+# a particular place changes whether it observes DST.
+# We put these specifications here in the northamerica file both to
+# increase the chances that they'll actually get compiled and to
+# avoid the need to duplicate the US rules in another file.
+
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone EST -5:00 - EST
+Zone MST -7:00 - MST
+Zone HST -10:00 - HST
+Zone EST5EDT -5:00 US E%sT
+Zone CST6CDT -6:00 US C%sT
+Zone MST7MDT -7:00 US M%sT
+Zone PST8PDT -8:00 US P%sT
# From Bob Devine (1988-01-28):
# ...Alaska (and Hawaii) had the timezone names changed in 1967.
# 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.
-#
# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
# Public law 106-564 (2000-12-23) introduced the abbreviation
# "Chamorro Standard Time" for time in Guam and the Northern Marianas.
# See the file "australasia".
+# From Arthur David Olson, 2005-08-09
+# The following was signed into law on 2005-08-08.
+#
+# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
+# (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15
+# U.S.C. 260a(a)) is amended--
+# (1) by striking `first Sunday of April' and inserting `second
+# Sunday of March'; and
+# (2) by striking `last Sunday of October' and inserting `first
+# Sunday of November'.
+# (b) Effective Date- Subsection (a) shall take effect 1 year after the
+# date of enactment of this Act or March 1, 2007, whichever is later.
+# (c) Report to Congress- Not later than 9 months after the effective
+# date stated in subsection (b), the Secretary shall report to Congress
+# on the impact of this section on energy consumption in the United
+# States.
+# (d) Right to Revert- Congress retains the right to revert the
+# Daylight Saving Time back to the 2005 time schedules once the
+# Department study is complete.
# US eastern time, represented by New York
# Connecticut, Delaware, District of Columbia, most of Florida,
-# Georgia, far southeastern Indiana, eastern Kentucky, Maine,
-# Maryland, Massachusetts, New Hampshire, New Jersey, New York, North
-# Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, eastern
-# Tennessee, Vermont, Virginia, West Virginia
+# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
+# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
+# New Hampshire, New Jersey, New York, North Carolina, Ohio,
+# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
+# Vermont, Virginia, West Virginia
+
+# From Dave Cantor (2004-11-02):
+# Early this summer I had the occasion to visit the Mount Washington
+# Observatory weather station atop (of course!) Mount Washington [, NH]....
+# One of the staff members said that the station was on Eastern Standard Time
+# and didn't change their clocks for Daylight Saving ... so that their
+# reports will always have times which are 5 hours behind UTC.
+
+# From Paul Eggert (2005-08-26):
+# According to today's Huntsville Times
+# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1>
+# a few towns on Alabama's "eastern border with Georgia, such as Phenix City
+# in Russell County, Lanett in Chambers County and some towns in Lee County,
+# set their watches and clocks on Eastern time." It quotes H.H. "Bubba"
+# Roberts, city administrator in Phenix City. as saying "We are in the Central
+# time zone, but we do go by the Eastern time zone because so many people work
+# in Columbus."
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
Rule NYC 1920 only - Mar 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
+Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58
-5:00 US E%sT 1920
-5:00 NYC E%sT 1942
-5:00 US E%sT 1946
# US central time, represented by Chicago
-# Alabama, Arkansas, Florida panhandle, Illinois, western Indiana
-# corners, Iowa, most of Kansas, western Kentucky, Louisiana,
-# Minnesota, Mississippi, Missouri, eastern Nebraska, eastern North
-# Dakota, Oklahoma, eastern South Dakota, western Tennessee, most of
-# Texas, Wisconsin
+# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
+# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
+# Washington counties), Illinois, western Indiana
+# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
+# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
+# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
+# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
+# western Tennessee, most of Texas, Wisconsin
+
+# From Larry M. Smith (2006-04-26) re Wisconsin:
+# http://www.legis.state.wi.us/statutes/Stat0175.pdf ...
+# is currently enforced at the 01:00 time of change. Because the local
+# "bar time" in the state corresponds to 02:00, a number of citations
+# are issued for the "sale of class 'B' alcohol after prohibited
+# hours" within the deviated hour of this change every year....
+#
+# From Douglas R. Bomberg (2007-03-12):
+# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
+# Statue 175 closer in synch with the US Congress' intent....
+# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
Rule Chicago 1920 only - Jun 13 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
+Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24
-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 1967
-6:00 US C%sT
# Oliver County, ND switched from mountain to central time on 1992-10-25.
-Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:00
+Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48
-7:00 US M%sT 1992 Oct 25 02:00
-6:00 US C%sT
+# Morton County, ND, switched from mountain to central time on
+# 2003-10-26, except for the area around Mandan which was already central time.
+# See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
+# Officially this switch also included part of Sioux County, and
+# Jones, Mellette, and Todd Counties in South Dakota;
+# but in practice these other counties were already observing central time.
+# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
+Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21
+ -7:00 US M%sT 2003 Oct 26 02:00
+ -6:00 US C%sT
# US mountain time, represented by Denver
#
-# Colorado, southern Idaho, far western Kansas, Montana, western
+# Colorado, far western Kansas, Montana, western
# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
-# New Mexico, southwestern North Dakota, far eastern Oregon,
+# New Mexico, southwestern North Dakota,
# western South Dakota, far western Texas (El Paso County, Hudspeth County,
# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
#
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
+Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04
-7:00 US M%sT 1920
-7:00 Denver M%sT 1942
-7:00 US M%sT 1946
# US Pacific time, represented by Los Angeles
#
-# California, northern Idaho, most of Nevada, most of Oregon, and Washington
+# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
+# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties,
+# and the northern three-quarters of Idaho county),
+# most of Nevada, most of Oregon, and Washington
#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
Rule CA 1948 only - Mar 14 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
+Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02
-8:00 US P%sT 1946
-8:00 CA P%sT 1967
-8:00 US P%sT
-8:00 US P%sT 1946
-8:00 - PST 1969
-8:00 US P%sT 1983 Oct 30 2:00
+ -9:00 US Y%sT 1983 Nov 30
-9:00 US AK%sT
Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18
-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 Y%sT 1983 Nov 30
-9:00 US AK%sT
Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18
-9:59:36 - LMT 1900 Aug 20 12:00
-10:00 - CAT 1942
- -10:00 US CAT/CAWT 1946
+ -10:00 US CAT/CAWT 1945 Aug 14 23:00u
+ -10:00 US CAT/CAPT 1946 # Peace
-10:00 - CAT 1967 Apr
-10:00 - AHST 1969
-10:00 US AH%sT 1983 Oct 30 2:00
+ -9:00 US Y%sT 1983 Nov 30
-9:00 US AK%sT
Zone America/Nome 12:58:21 - LMT 1867 Oct 18
-11:01:38 - LMT 1900 Aug 20 12:00
-11:00 - NST 1967 Apr
-11:00 - BST 1969
-11:00 US B%sT 1983 Oct 30 2:00
+ -9:00 US Y%sT 1983 Nov 30
-9:00 US AK%sT
Zone America/Adak 12:13:21 - LMT 1867 Oct 18
-11:46:38 - LMT 1900 Aug 20 12:00
-11:00 - NST 1967 Apr
-11:00 - BST 1969
-11:00 US B%sT 1983 Oct 30 2:00
+ -10:00 US AH%sT 1983 Nov 30
-10:00 US HA%sT
+# The following switches don't quite make our 1970 cutoff.
+#
# 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.
+#
+# From David Flater (2004-11-09):
+# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
+# Historic Preservation Commission, provided this information, which
+# suggests that Unalaska deviated from statutory time from early 1967
+# possibly until 1983:
+#
+# Minutes of the Unalaska City Council Meeting, January 10, 1967:
+# "Except for St. Paul and Akutan, Unalaska is the only important
+# location not on Alaska Standard Time. The following resolution was
+# made by William Robinson and seconded by Henry Swanson: Be it
+# resolved that the City of Unalaska hereby goes to Alaska Standard
+# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
+# January 14, Alaska Standard Time.) This resolution was passed with
+# three votes for and one against."
# Hawaii
#
# 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
+
+# From Paul Eggert (2002-10-20):
+#
+# The information in the rest of this paragraph is derived from the
+# <a href="http://www.dlapr.lib.az.us/links/daylight.htm">
+# Daylight Saving Time web page (2002-01-23)</a> maintained by the
+# Arizona State Library, Archives and Public Records.
+# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
+# time, but by federal law railroads, airlines, bus lines, military
+# personnel, and some engaged in interstate commerce continued to
+# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix
+# Gazette says that was the date the law changed, and that 04-01 was
+# the date the state's clocks would change. In 1945 the State of
+# Arizona used standard time all year, again with exceptions only as
+# mandated by federal law. Arizona observed DST in 1967, but Arizona
+# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
+#
+# Shanks says the 1944 experiment came to an end on 1944-03-17.
+# Go with the Arizona State Library instead.
+
+Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42
-7:00 US M%sT 1944 Jan 1 00:01
- -7:00 - MST 1944 Mar 17 00:01
+ -7:00 - MST 1944 Apr 1 00:01
-7:00 US M%sT 1944 Oct 1 00:01
-7:00 - MST 1967
- -7:00 US M%sT 1968
+ -7:00 US M%sT 1968 Mar 21
-7:00 - MST
# From Arthur David Olson (1988-02-13):
# A writer from the Inter Tribal Council of Arizona, Inc.,
-# notes in private correspondence dated 12/28/87 that "Presently, only the
+# notes in private correspondence dated 1987-12-28 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
-# Southern Idaho and eastern Oregon switched four weeks late in 1974.
+# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
+# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
+# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
+# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
+# Teton, Twin Falls, Valley, Washington counties, and the southern
+# quarter of Idaho county) and eastern Oregon (most of Malheur County)
+# switched four weeks late in 1974.
+#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00
+Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11
-8:00 US P%sT 1923 May 13 2:00
-7:00 US M%sT 1974
-7:00 - MST 1974 Feb 3 2:00
# For a map of Indiana's time zone regions, see:
# <a href="http://www.mccsc.edu/time.html">
# What time is it in Indiana?
-# </a> (1999-04-06)
+# </a> (2006-03-01)
#
-# 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.
+# From Paul Eggert (2007-08-17):
+# Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
+# with the following exceptions:
+#
+# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
+# Vandenburgh, and Warrick counties have been like America/Chicago.
+#
+# - Dearborn and Ohio counties have been like America/New_York.
+#
+# - Clark, Floyd, and Harrison counties have been like
+# America/Kentucky/Louisville.
#
-# 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.
+# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
+# and Switzerland counties have their own time zone histories as noted below.
+#
+# Shanks partitioned Indiana into 345 regions, each with its own time history,
+# and wrote ``Even newspaper reports present contradictory information.''
+# Those Hoosiers! Such a flighty and changeable people!
+# Fortunately, most of the complexity occurred before our cutoff date of 1970.
#
# 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.
-# From Paul Eggert (2001-03-06), following a tip by Markus Kuhn:
-# Pam Belluck reported in the New York Times (2001-01-31) that the
-# Indiana Legislature is considering a bill to adopt DST statewide.
-# Her article mentioned Vevay, whose post office observes a different
-# time zone from Danner's Hardware across the street.
+# From Paul Eggert (2005-08-16):
+# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006.
+
+# From Nathan Stratton Treadway (2006-03-30):
+# http://www.dot.gov/affairs/dot0406.htm [3705 B]
+# From Deborah Goldsmith (2006-01-18):
+# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB]
+# From Paul Eggert (2006-01-20):
+# It says "DOT is relocating the time zone boundary in Indiana to move Starke,
+# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
+# Eastern Time Zone to the Central Time Zone.... The effective date of
+# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the
+# changeover date from standard time to Daylight Saving Time."
+# Strictly speaking, this means the affected counties will change their
+# clocks twice that night, but this obviously is in error. The intent
+# is that 01:59:59 EST be followed by 02:00:00 CDT.
+
+# From Gwillim Law (2007-02-10):
+# The Associated Press has been reporting that Pulaski County, Indiana is
+# going to switch from Central to Eastern Time on March 11, 2007....
+# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
# 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
+Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22
-6:00 US C%sT 1920
-6:00 Indianapolis C%sT 1942
-6:00 US C%sT 1946
-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
+ -5:00 - EST 2006
+ -5:00 US E%sT
#
-# Part of Crawford County, Indiana, last observed DST in 1975,
-# and left its clocks alone in 1974.
+# Eastern Crawford County, Indiana, left its clocks alone in 1974,
+# as well as from 1976 through 2005.
# 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
+Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37
-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
+ -5:00 - EST 2006
+ -5:00 US E%sT
+#
+# Daviess, Dubois, Knox, and Martin Counties, Indiana,
+# switched from eastern to central time in April 2006, then switched back
+# in November 2007.
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D
+Rule Vincennes 1946 only - Sep lastSun 2:00 0 S
+Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D
+Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S
+Rule Vincennes 1955 only - May 1 0:00 1:00 D
+Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D
+Rule Vincennes 1960 only - Oct lastSun 2:00 0 S
+Rule Vincennes 1961 only - Sep lastSun 2:00 0 S
+Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53
+ -6:00 US C%sT 1946
+ -6:00 Vincennes C%sT 1964 Apr 26 2:00
+ -5:00 - EST 1969
+ -5:00 US E%sT 1971
+ -5:00 - EST 2006 Apr 2 2:00
+ -6:00 US C%sT 2007 Nov 4 2:00
+ -5:00 US E%sT
+#
+# Perry County, Indiana, switched from eastern to central time in April 2006.
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule Perry 1946 only - Apr lastSun 2:00 1:00 D
+Rule Perry 1946 only - Sep lastSun 2:00 0 S
+Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D
+Rule Perry 1953 1959 - Sep lastSun 2:00 0 S
+Rule Perry 1955 only - May 1 0:00 1:00 D
+Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D
+Rule Perry 1960 only - Oct lastSun 2:00 0 S
+Rule Perry 1961 only - Sep lastSun 2:00 0 S
+Rule Perry 1962 1963 - Oct lastSun 2:00 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57
+ -6:00 US C%sT 1946
+ -6:00 Perry C%sT 1964 Apr 26 2:00
+ -5:00 - EST 1969
+ -5:00 US E%sT 1971
+ -5:00 - EST 2006 Apr 2 2:00
+ -6:00 US C%sT
#
-# Starke County, Indiana
+# Pike County, Indiana moved from central to eastern time in 1977,
+# then switched back in 2006, then switched back again in 2007.
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule Pike 1955 only - May 1 0:00 1:00 D
+Rule Pike 1955 1960 - Sep lastSun 2:00 0 S
+Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D
+Rule Pike 1961 1964 - Oct lastSun 2:00 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53
+ -6:00 US C%sT 1955
+ -6:00 Pike C%sT 1965 Apr 25 2:00
+ -5:00 - EST 1966 Oct 30 2:00
+ -6:00 US C%sT 1977 Oct 30 2:00
+ -5:00 - EST 2006 Apr 2 2:00
+ -6:00 US C%sT 2007 Nov 4 2:00
+ -5:00 US E%sT
+#
+# Starke County, Indiana moved from central to eastern time in 1991,
+# then switched back in 2006.
# From Arthur David Olson (1991-10-28):
# An article on page A3 of the Sunday, 1991-10-27 Washington Post
# notes that Starke County switched from Central time to Eastern time as of
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
+Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30
-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
+ -5:00 - EST 2006 Apr 2 2:00
+ -6:00 US C%sT
#
-# Switzerland County, Indiana, last observed DST in 1972.
+# Pulaski County, Indiana, switched from eastern to central time in
+# April 2006 and then switched back in March 2007.
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D
+Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S
+Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S
+Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:00
+Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35
+ -6:00 US C%sT 1946
+ -6:00 Pulaski C%sT 1961 Apr 30 2:00
+ -5:00 - EST 1969
+ -5:00 US E%sT 1971
+ -5:00 - EST 2006 Apr 2 2:00
+ -6:00 US C%sT 2007 Mar 11 2:00
+ -5:00 US E%sT
+#
+# Switzerland County, Indiana, did not observe DST from 1973 through 2005.
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44
-6:00 US C%sT 1954 Apr 25 2:00
-5:00 - EST 1969
-5:00 US E%sT 1973
- -5:00 - EST
+ -5:00 - EST 2006
+ -5:00 US E%sT
# Part of Kentucky left its clocks alone in 1974.
-# This also includes a part of Indiana immediately adjacent to Louisville.
+# This also includes Clark, Floyd, and Harrison counties in Indiana.
# 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 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
+Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58
-6:00 US C%sT 1921
-6:00 Louisville C%sT 1942
-6:00 US C%sT 1946
-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
-Link America/Louisville America/Kentucky/Louisville
#
-# Wayne, Clinton, and Russell Counties, Kentucky
+# Wayne County, Kentucky
#
# From
# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml">
# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22">
# Federal Register 65, 160 (2000-08-17), page 50154-50158.
# </a>
-#
-Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00
+#
+Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36
-6:00 US C%sT 1946
-6:00 - CST 1968
-6:00 US C%sT 2000 Oct 29 2:00
-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.
+# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
+# 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
# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
# Jimmy Skaggs, _The Great Guano Rush_ (1994).
-# Old names, for S5 users
-
-# Link LINK-FROM LINK-TO
-Link America/New_York EST5EDT
-Link America/Chicago CST6CDT
-Link America/Denver MST7MDT
-Link America/Los_Angeles PST8PDT
-Link America/Indianapolis EST
-Link America/Phoenix MST
-Link Pacific/Honolulu HST
-
################################################################################
-# From Paul Eggert <eggert@twinsun.com> (1999-10-29):
-# A good source for time zone historical data outside the US is
-# Thomas G. Shanks, The International Atlas (5th edition),
-# San Diego: ACS Publications, Inc. (1999).
+# From Paul Eggert (2006-03-22):
+# A good source for time zone historical data outside the U.S. is
+# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
+# San Diego: ACS Publications, Inc. (2003).
#
# Gwillim Law writes that a good source
# for recent time zone data is the International Air Transport
# published semiannually. Law sent in several helpful summaries
# of the IATA's data after 1990.
#
-# Except where otherwise noted, Shanks is the source for entries through 1990,
-# and IATA SSIM is the source for entries after 1990.
+# Except where otherwise noted, Shanks & Pottenger is the source for
+# entries through 1990, and IATA SSIM is the source for entries afterwards.
+#
+# Other sources occasionally used include:
#
-# Another source occasionally used is Edward W. Whitman, World Time Differences,
-# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
-# I found in the UCLA library.
+# Edward W. Whitman, World Time Differences,
+# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
+# which I found in the UCLA library.
+#
+# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf">
+# William Willett, The Waste of Daylight, 19th edition
+# </a> (1914-03)
#
# See the `europe' file for Greenland.
# Canada
-# From Alain LaBont<e'> <ALB@immedia.ca> (1994-11-14):
+# From Alain LaBont<e'> (1994-11-14):
# I post here the time zone abbreviations standardized in Canada
# for both English and French in the CAN/CSA-Z234.4-89 standard....
#
# T: de Terre-Neuve
# Y: du Yukon Yukon
#
-# From Paul Eggert <eggert@twinsun.com> (1994-11-22):
+# From Paul Eggert (1994-11-22):
# Alas, this sort of thing must be handled by localization software.
-# Unless otherwise specified, the data for Canada are all from Shanks.
-
-# From Paul Eggert (2000-10-02):
+# Unless otherwise specified, the data for Canada are all from Shanks
+# & Pottenger.
+
+# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
+# 2007-03-01):
+# The British Columbia government announced yesterday that it will
+# adjust daylight savings next year to align with changes in the
+# U.S. and the rest of Canada....
+# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm
+# ...
+# Nova Scotia
+# Daylight saving time will be extended by four weeks starting in 2007....
+# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf
+#
+# [For New Brunswick] the new legislation dictates that the time change is to
+# be done at 02:00 instead of 00:01.
+# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
+# ...
+# Manitoba has traditionally changed the clock every fall at 03:00.
+# As of 2006, the transition is to take place one hour earlier at 02:00.
+# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
+# ...
+# [Alberta, Ontario, Quebec] will follow US rules.
+# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
+# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
+# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
+# ...
+# P.E.I. will follow US rules....
+# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
+# ...
+# Province of Newfoundland and Labrador....
+# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
+# ...
+# Yukon
+# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
+# ...
+# N.W.T. will follow US rules. Whoever maintains the government web site
+# does not seem to believe in bookmarks. To see the news release, click the
+# following link and search for "Daylight Savings Time Change". Press the
+# "Daylight Savings Time Change" link; it will fire off a popup using
+# JavaScript.
+# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
+# ...
+# Nunavut
+# An amendment to the Interpretation Act was registered on February 19/2007....
+# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
+
+# From Paul Eggert (2006-04-25):
# H. David Matthews and Mary Vincent's map
-# <a href="http://www.canadiangeographic.ca/SO98/geomap.htm">
+# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp">
# "It's about TIME", _Canadian Geographic_ (September-October 1998)
# </a> contains detailed boundaries for regions observing nonstandard
# time and daylight saving time arrangements in Canada circa 1998.
#
-# INMS, the Institute for National Measurement Standards in Ottawa, has
-# <a href="http://www.nrc.ca/inms/time/tze.html">
+# INMS, the Institute for National Measurement Standards in Ottawa, has <a
+# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php">
# information about standard and daylight saving time zones in Canada.
# </a> (updated periodically).
# Its unofficial information is often taken from Matthews and Vincent.
+# From Paul Eggert (2006-06-27):
+# For now, assume all of DST-observing Canada will fall into line with the
+# new US DST rules,
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Canada 1918 only - Apr 14 2:00 1:00 D
Rule Canada 1918 only - Oct 31 2:00 0 S
-Rule Canada 1942 only - Feb 9 2:00 1:00 W
+Rule Canada 1942 only - Feb 9 2:00 1:00 W # War
+Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace
Rule Canada 1945 only - Sep 30 2:00 0 S
Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D
-Rule Canada 1974 max - Oct lastSun 2:00 0 S
-Rule Canada 1987 max - Apr Sun>=1 2:00 1:00 D
+Rule Canada 1974 2006 - Oct lastSun 2:00 0 S
+Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D
+Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D
+Rule Canada 2007 max - Nov Sun>=1 2:00 0 S
-# Newfoundland (and far southeast Labrador)
+# Newfoundland and Labrador
# From Paul Eggert (2000-10-02):
# Matthews and Vincent (1998) write that Labrador should use NST/NDT,
# but excluding, say, Black Tickle.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule StJohns 1917 1918 - Apr Sun>=8 2:00 1:00 D
+Rule StJohns 1917 only - Apr 8 2:00 1:00 D
Rule StJohns 1917 only - Sep 17 2:00 0 S
-Rule StJohns 1918 only - Oct 31 2:00 0 S
-# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks.
+# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
Rule StJohns 1919 only - May 5 23:00 1:00 D
Rule StJohns 1919 only - Aug 12 23:00 0 S
-# For 1931-1935 Whitman gives Apr same date; go with Shanks.
+# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D
Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S
-# For 1936-1941 Shanks gives May Mon>=9 and Oct Mon>=2; go with Whitman.
-Rule StJohns 1936 1941 - May Sun>=8 0:00 1:00 D
-Rule StJohns 1936 1941 - Oct Sun>=1 0:00 0 S
-# Shanks gives 1942 May 11 - 1945 Sep 30; go with Whitman.
-Rule StJohns 1942 only - Mar 1 0:00 1:00 W
-Rule StJohns 1942 only - Dec 31 0:00 0 S
-Rule StJohns 1943 only - May 30 0:00 1:00 W
-Rule StJohns 1943 only - Sep 5 0:00 0 S
-Rule StJohns 1944 only - Jul 10 0:00 1:00 W
-Rule StJohns 1944 only - Sep 2 0:00 0 S
-Rule StJohns 1945 only - Jan 1 0:00 1:00 W
-Rule StJohns 1945 only - Oct 7 2:00 0 S
+# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
+# Pottenger.
+Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D
+Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S
+# Whitman gives the following transitions:
+# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
+# but go with Shanks & Pottenger and assume they used Canadian rules.
# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
-# Apr 30 - Sep 24; go with Shanks.
+# Apr 30 - Sep 24; go with Shanks & Pottenger.
Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D
Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S
Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
# at 00:01 local time. For now, assume it started in 1987.
Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
-Rule StJohns 1987 max - Oct lastSun 0:01 0 S
+Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S
Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
-Rule StJohns 1989 max - Apr Sun>=1 0:01 1:00 D
+Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D
+Rule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D
+Rule StJohns 2007 max - Nov Sun>=1 0:01 0 S
+#
# St John's has an apostrophe, but Posix file names can't have apostrophes.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/St_Johns -3:30:52 - LMT 1884
+ -3:30:52 StJohns N%sT 1918
+ -3:30:52 Canada N%sT 1919
-3:30:52 StJohns N%sT 1935 Mar 30
+ -3:30 StJohns N%sT 1942 May 11
+ -3:30 Canada N%sT 1946
-3:30 StJohns N%sT
-
# most of east Labrador
# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
- -3:30:52 StJohns NST 1919
+ -3:30:52 - NST 1918
+ -3:30:52 Canada N%sT 1919
-3:30:52 - NST 1935 Mar 30
-3:30 - NST 1936
+ -3:30 StJohns N%sT 1942 May 11
+ -3:30 Canada N%sT 1946
-3:30 StJohns N%sT 1966 Mar 15 2:00
-4:00 StJohns A%sT
-# west Labrador, New Brunswick, Nova Scotia, Prince Edward I
+# west Labrador, Nova Scotia, Prince Edward I
-# From Paul Eggert (1996-06-12):
-# Shanks writes that since 1970 most of this region has been like Halifax.
-# Many locales did not observe peacetime DST until 1972;
+# From Paul Eggert (2006-03-22):
+# Shanks & Pottenger write that since 1970 most of this region has been like
+# Halifax. Many locales did not observe peacetime DST until 1972;
# Glace Bay, NS is the largest that we know of.
-# Shanks also writes that Liverpool, NS was the only town in Canada to observe
-# DST in 1971 but not 1970; for now we'll assume this is a typo.
-
-# From Paul Eggert (2000-10-02):
-# INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches
-# at 00:01 local time. FIXME: verify and create a new Zone for this.
-
+# Shanks & Pottenger also write that Liverpool, NS was the only town
+# in Canada to observe DST in 1971 but not 1970; for now we'll assume
+# this is a typo.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule Halifax 1916 only - Apr 1 0:00 1:00 D
-Rule Halifax 1916 only - Oct 1 0:00 0 S
-Rule Halifax 1918 only - Apr 14 2:00 1:00 D
-Rule Halifax 1918 only - Oct 31 2:00 0 S
-Rule Halifax 1920 only - May 9 0:00 1:00 D
-Rule Halifax 1920 only - Aug 29 0:00 0 S
-Rule Halifax 1921 only - May 6 0:00 1:00 D
-Rule Halifax 1921 1922 - Sep 5 0:00 0 S
-Rule Halifax 1922 only - Apr 30 0:00 1:00 D
-Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
-Rule Halifax 1923 only - Sep 4 0:00 0 S
-Rule Halifax 1924 only - Sep 15 0:00 0 S
-Rule Halifax 1925 only - Sep 28 0:00 0 S
-Rule Halifax 1926 only - May 16 0:00 1:00 D
-Rule Halifax 1926 only - Sep 13 0:00 0 S
-Rule Halifax 1927 only - May 1 0:00 1:00 D
-Rule Halifax 1927 only - Sep 26 0:00 0 S
-Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
-Rule Halifax 1928 only - Sep 9 0:00 0 S
-Rule Halifax 1929 only - Sep 3 0:00 0 S
-Rule Halifax 1930 only - Sep 15 0:00 0 S
-Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
-Rule Halifax 1933 only - Apr 30 0:00 1:00 D
-Rule Halifax 1933 only - Oct 2 0:00 0 S
-Rule Halifax 1934 only - May 20 0:00 1:00 D
-Rule Halifax 1934 only - Sep 16 0:00 0 S
-Rule Halifax 1935 only - Jun 2 0:00 1:00 D
-Rule Halifax 1935 only - Sep 30 0:00 0 S
-Rule Halifax 1936 only - Jun 1 0:00 1:00 D
-Rule Halifax 1936 only - Sep 14 0:00 0 S
-Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
-Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
-Rule Halifax 1939 only - May 28 0:00 1:00 D
-Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
-Rule Halifax 1942 only - Feb 9 2:00 1:00 W
-Rule Halifax 1945 1959 - Sep lastSun 2:00 0 S
-Rule Halifax 1946 1959 - Apr lastSun 2:00 1:00 D
-Rule Halifax 1962 1986 - Apr lastSun 2:00 1:00 D
-Rule Halifax 1962 max - Oct lastSun 2:00 0 S
-Rule Halifax 1987 max - Apr Sun>=1 2:00 1:00 D
+Rule Halifax 1916 only - Apr 1 0:00 1:00 D
+Rule Halifax 1916 only - Oct 1 0:00 0 S
+Rule Halifax 1920 only - May 9 0:00 1:00 D
+Rule Halifax 1920 only - Aug 29 0:00 0 S
+Rule Halifax 1921 only - May 6 0:00 1:00 D
+Rule Halifax 1921 1922 - Sep 5 0:00 0 S
+Rule Halifax 1922 only - Apr 30 0:00 1:00 D
+Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
+Rule Halifax 1923 only - Sep 4 0:00 0 S
+Rule Halifax 1924 only - Sep 15 0:00 0 S
+Rule Halifax 1925 only - Sep 28 0:00 0 S
+Rule Halifax 1926 only - May 16 0:00 1:00 D
+Rule Halifax 1926 only - Sep 13 0:00 0 S
+Rule Halifax 1927 only - May 1 0:00 1:00 D
+Rule Halifax 1927 only - Sep 26 0:00 0 S
+Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
+Rule Halifax 1928 only - Sep 9 0:00 0 S
+Rule Halifax 1929 only - Sep 3 0:00 0 S
+Rule Halifax 1930 only - Sep 15 0:00 0 S
+Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
+Rule Halifax 1932 only - May 1 0:00 1:00 D
+Rule Halifax 1933 only - Apr 30 0:00 1:00 D
+Rule Halifax 1933 only - Oct 2 0:00 0 S
+Rule Halifax 1934 only - May 20 0:00 1:00 D
+Rule Halifax 1934 only - Sep 16 0:00 0 S
+Rule Halifax 1935 only - Jun 2 0:00 1:00 D
+Rule Halifax 1935 only - Sep 30 0:00 0 S
+Rule Halifax 1936 only - Jun 1 0:00 1:00 D
+Rule Halifax 1936 only - Sep 14 0:00 0 S
+Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
+Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
+Rule Halifax 1939 only - May 28 0:00 1:00 D
+Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
+Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D
+Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S
+Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D
+Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S
+Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D
+Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S
+Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D
+Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
- -4:00 Halifax A%sT
+ -4:00 Halifax A%sT 1918
+ -4:00 Canada A%sT 1919
+ -4:00 Halifax A%sT 1942 Feb 9 2:00s
+ -4:00 Canada A%sT 1946
+ -4:00 Halifax A%sT 1974
+ -4:00 Canada A%sT
Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
-4:00 Canada A%sT 1953
-4:00 Halifax A%sT 1954
-4:00 - AST 1972
- -4:00 Halifax A%sT
+ -4:00 Halifax A%sT 1974
+ -4:00 Canada A%sT
+# New Brunswick
-# Ontario, Quebec
+# From Paul Eggert (2007-01-31):
+# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
+# says they changed at 00:01 through 2006, and
+# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
+# clear that this was the case since at least 1993.
+# For now, assume it started in 1993.
-# From Paul Eggert (1996-06-12):
-# Shanks writes that since 1970 most of this region has been like Montreal.
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
+Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D
+Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S
+Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D
+Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S
+Rule Moncton 1939 only - May 27 1:00 1:00 D
+Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S
+Rule Moncton 1940 only - May 19 1:00 1:00 D
+Rule Moncton 1941 only - May 4 1:00 1:00 D
+Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D
+Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S
+Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S
+Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D
+Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Moncton -4:19:08 - LMT 1883 Dec 9
+ -5:00 - EST 1902 Jun 15
+ -4:00 Canada A%sT 1933
+ -4:00 Moncton A%sT 1942
+ -4:00 Canada A%sT 1946
+ -4:00 Moncton A%sT 1973
+ -4:00 Canada A%sT 1993
+ -4:00 Moncton A%sT 2007
+ -4:00 Canada A%sT
+
+# Quebec
+
+# From Paul Eggert (2006-07-09):
+# Shanks & Pottenger write that since 1970 most of Quebec has been
+# like Montreal.
+
+# From Paul Eggert (2006-06-27):
+# Matthews and Vincent (1998) also write that Quebec east of the -63
+# meridian is supposed to observe AST, but residents as far east as
+# Natashquan use EST/EDT, and residents east of Natashquan use AST.
+# In "Official time in Quebec" the Quebec department of justice writes in
+# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm
+# that "The residents of the Municipality of the
+# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin,
+# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is
+# written and use Atlantic standard time all year round. The same applies to
+# the residents of the Native facilities along the lower North Shore."
+# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm>
+# says this common practice was codified into law as of 2007.
+# For lack of better info, guess this practice began around 1970, contra to
+# Shanks & Pottenger who have this region observing AST/ADT.
+
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
+Rule Mont 1917 only - Mar 25 2:00 1:00 D
+Rule Mont 1917 only - Apr 24 0:00 0 S
+Rule Mont 1919 only - Mar 31 2:30 1:00 D
+Rule Mont 1919 only - Oct 25 2:30 0 S
+Rule Mont 1920 only - May 2 2:30 1:00 D
+Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S
+Rule Mont 1921 only - May 1 2:00 1:00 D
+Rule Mont 1922 only - Apr 30 2:00 1:00 D
+Rule Mont 1924 only - May 17 2:00 1:00 D
+Rule Mont 1924 1926 - Sep lastSun 2:30 0 S
+Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D
+# The 1927-to-1937 rules can be expressed more simply as
+# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D
+# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S
+# The rules below avoid use of 24:00
+# (which pre-1998 versions of zic cannot handle).
+Rule Mont 1927 only - May 1 0:00 1:00 D
+Rule Mont 1927 1932 - Sep lastSun 0:00 0 S
+Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D
+Rule Mont 1932 only - May 1 0:00 1:00 D
+Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D
+Rule Mont 1933 only - Oct 1 0:00 0 S
+Rule Mont 1934 1939 - Sep lastSun 0:00 0 S
+Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D
+Rule Mont 1945 1948 - Sep lastSun 2:00 0 S
+Rule Mont 1949 1950 - Oct lastSun 2:00 0 S
+Rule Mont 1951 1956 - Sep lastSun 2:00 0 S
+Rule Mont 1957 1973 - Oct lastSun 2:00 0 S
+
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Blanc-Sablon -3:48:28 - LMT 1884
+ -4:00 Canada A%sT 1970
+ -4:00 - AST
+Zone America/Montreal -4:54:16 - LMT 1884
+ -5:00 Mont E%sT 1918
+ -5:00 Canada E%sT 1919
+ -5:00 Mont E%sT 1942 Feb 9 2:00s
+ -5:00 Canada E%sT 1946
+ -5:00 Mont E%sT 1974
+ -5:00 Canada E%sT
+
+
+# Ontario
+
+# From Paul Eggert (2006-07-09):
+# Shanks & Pottenger write that since 1970 most of Ontario has been like
+# Toronto.
# Thunder Bay skipped DST in 1973.
# Many smaller locales did not observe peacetime DST until 1974;
# Nipigon (EST) and Rainy River (CST) are the largest that we know of.
# Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
+# From Mark Brader (2003-07-26):
+# [According to the Toronto Star] Orillia, Ontario, adopted DST
+# effective Saturday, 1912-06-22, 22:00; the article mentions that
+# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
+# have already done so. In Orillia DST was to run until Saturday,
+# 1912-08-31 (no time mentioned), but it was met with considerable
+# hostility from certain segments of the public, and was revoked after
+# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but
+# presumably that should be -07-06. (1912-06-19, -07-12; also letters
+# earlier in June).
+#
+# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
+
# From Paul Eggert (1997-10-17):
-# msb@sq.com writes that an article in the 1997-10-14 Toronto Star
+# Mark Brader writes that an article in the 1997-10-14 Toronto Star
# says that Atikokan, Ontario currently does not observe DST,
# but will vote on 11-10 whether to use EST/EDT.
# He also writes that the
# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
# Officially Atikokan is therefore on CST/CDT, and most likely this report
# concerns a non-official time observed as a matter of local practice.
-# For what it's worth, Shanks says that Atikokan has agreed with
-# Rainy River ever since standard time was introduced.
-
+#
# From Paul Eggert (2000-10-02):
# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
# New Osnaburgh observe CST all year, that Big Trout Lake observes
# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
# violation of the official Ontario rules.
-# They also write that Quebec east of the -63 meridian is supposed to
-# observe AST, but residents as far east as Natashquan use EST/EDT,
-# and residents east of Natashquan use AST.
-# We probably need Zones for far east Quebec and for Atikokan,
-# but we don't know when their practices started.
+#
+# From Paul Eggert (2006-07-09):
+# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the
+# 2005-07-21 Chronicle-Journal, which said:
+#
+# The clocks in Atikokan stay set on standard time year-round.
+# This means they spend about half the time on central time and
+# the other half on eastern time.
+#
+# For the most part, the system works, Mayor Dennis Brown said.
+#
+# "The majority of businesses in Atikokan deal more with Eastern
+# Canada, but there are some that deal with Western Canada," he
+# said. "I don't see any changes happening here."
+#
+# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang
+# [New Osnaburgh] follow the same practice."
+
+# From Garry McKinnon (2006-07-14) via Chris Walton:
+# I chatted with a member of my board who has an outstanding memory
+# and a long history in Atikokan (and in the telecom industry) and he
+# can say for certain that Atikokan has been practicing the current
+# time keeping since 1952, at least.
+
+# From Paul Eggert (2006-07-17):
+# Shanks & Pottenger say that Atikokan has agreed with Rainy River
+# ever since standard time was introduced, but the information from
+# McKinnon sounds more authoritative. For now, assume that Atikokan
+# switched to EST immediately after WWII era daylight saving time
+# ended. This matches the old (less-populous) America/Coral_Harbour
+# entry since our cutoff date of 1970, so we can move
+# America/Coral_Harbour to the 'backward' file.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule Mont 1917 only - Mar 25 2:00 1:00 D
-Rule Mont 1917 only - Apr 24 0:00 0 S
-Rule Mont 1918 only - Apr 14 2:00 1:00 D
-Rule Mont 1918 only - Oct 31 2:00 0 S
-Rule Mont 1919 only - Mar 31 2:30 1:00 D
-Rule Mont 1919 only - Oct 25 2:30 0 S
-Rule Mont 1920 only - May 2 2:30 1:00 D
-Rule Mont 1920 only - Oct 3 2:30 0 S
-Rule Mont 1921 only - May 1 2:00 1:00 D
-Rule Mont 1921 only - Oct 2 2:30 0 S
-Rule Mont 1922 only - Apr 30 2:00 1:00 D
-Rule Mont 1922 only - Oct 1 2:30 0 S
-Rule Mont 1924 only - May 17 2:00 1:00 D
-Rule Mont 1924 1926 - Sep lastSun 2:30 0 S
-Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D
-Rule Mont 1927 only - May 1 0:00 1:00 D
-Rule Mont 1927 1932 - Sep Sun>=25 0:00 0 S
-Rule Mont 1928 1931 - Apr Sun>=25 0:00 1:00 D
-Rule Mont 1932 only - May 1 0:00 1:00 D
-Rule Mont 1933 1940 - Apr Sun>=24 0:00 1:00 D
-Rule Mont 1933 only - Oct 1 0:00 0 S
-Rule Mont 1934 1939 - Sep Sun>=24 0:00 0 S
-Rule Mont 1945 1948 - Sep lastSun 2:00 0 S
-Rule Mont 1946 1986 - Apr lastSun 2:00 1:00 D
-Rule Mont 1949 1950 - Oct lastSun 2:00 0 S
-Rule Mont 1951 1956 - Sep lastSun 2:00 0 S
-Rule Mont 1957 max - Oct lastSun 2:00 0 S
-Rule Mont 1987 max - Apr Sun>=1 2:00 1:00 D
+Rule Toronto 1919 only - Mar 30 23:30 1:00 D
+Rule Toronto 1919 only - Oct 26 0:00 0 S
+Rule Toronto 1920 only - May 2 2:00 1:00 D
+Rule Toronto 1920 only - Sep 26 0:00 0 S
+Rule Toronto 1921 only - May 15 2:00 1:00 D
+Rule Toronto 1921 only - Sep 15 2:00 0 S
+Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D
+# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
+# was meant.
+Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S
+Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D
+# The 1927-to-1939 rules can be expressed more simply as
+# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S
+# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D
+# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D
+# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S
+# The rules below avoid use of Sun>=25
+# (which pre-2004 versions of zic cannot handle).
+Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S
+Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D
+Rule Toronto 1932 only - May 1 2:00 1:00 D
+Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D
+Rule Toronto 1933 only - Oct 1 2:00 0 S
+Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S
+Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S
+Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D
+Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D
+Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S
+Rule Toronto 1949 only - Nov lastSun 0:00 0 S
+Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D
+Rule Toronto 1950 only - Nov lastSun 2:00 0 S
+Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S
+# Shanks & Pottenger say Toronto ended DST a week early in 1971,
+# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
+# is wrong, and that he had confirmed it by checking the 1971-10-30
+# Toronto Star, which said that DST was ending 1971-10-31 as usual.
+Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S
+
+# From Paul Eggert (2003-07-27):
+# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
+# Port Arthur, Ontario, the principle of the Bill has been in
+# operation for the past three years, and in the City of Moose Jaw,
+# Saskatchewan, for one year."
+
+# From David Bryan via Tory Tronrud, Director/Curator,
+# Thunder Bay Museum (2003-11-12):
+# There is some suggestion, however, that, by-law or not, daylight
+# savings time was being practiced in Fort William and Port Arthur
+# before 1909.... [I]n 1910, the line between the Eastern and Central
+# Time Zones was permanently moved about two hundred miles west to
+# include the Thunder Bay area.... When Canada adopted daylight
+# savings time in 1916, Fort William and Port Arthur, having done so
+# already, did not change their clocks.... During the Second World
+# War,... [t]he cities agreed to implement DST during the summer
+# months for the remainder of the war years.
+
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone America/Montreal -4:54:16 - LMT 1884
- -5:00 Mont E%sT
+Zone America/Toronto -5:17:32 - LMT 1895
+ -5:00 Canada E%sT 1919
+ -5:00 Toronto E%sT 1942 Feb 9 2:00s
+ -5:00 Canada E%sT 1946
+ -5:00 Toronto E%sT 1974
+ -5:00 Canada E%sT
Zone America/Thunder_Bay -5:57:00 - LMT 1895
+ -6:00 - CST 1910
+ -5:00 - EST 1942
-5:00 Canada E%sT 1970
-5:00 Mont E%sT 1973
-5:00 - EST 1974
-5:00 Canada E%sT
Zone America/Nipigon -5:53:04 - LMT 1895
+ -5:00 Canada E%sT 1940 Sep 29
+ -5:00 1:00 EDT 1942 Feb 9 2:00s
-5:00 Canada E%sT
-Zone America/Rainy_River -6:17:56 - LMT 1895
+Zone America/Rainy_River -6:18:16 - LMT 1895
+ -6:00 Canada C%sT 1940 Sep 29
+ -6:00 1:00 CDT 1942 Feb 9 2:00s
-6:00 Canada C%sT
+Zone America/Atikokan -6:06:28 - LMT 1895
+ -6:00 Canada C%sT 1940 Sep 29
+ -6:00 1:00 CDT 1942 Feb 9 2:00s
+ -6:00 Canada C%sT 1945 Sep 30 2:00
+ -5:00 - EST
# Manitoba
+# From Rob Douglas (2006-04-06):
+# the old Manitoba Time Act - as amended by Bill 2, assented to
+# March 27, 1987 ... said ...
+# "between two o'clock Central Standard Time in the morning of
+# the first Sunday of April of each year and two o'clock Central
+# Standard Time in the morning of the last Sunday of October next
+# following, one hour in advance of Central Standard Time."...
+# I believe that the English legislation [of the old time act] had =
+# been assented to (March 22, 1967)....
+# Also, as far as I can tell, there was no order-in-council varying
+# the time of Daylight Saving Time for 2005 and so the provisions of
+# the 1987 version would apply - the changeover was at 2:00 Central
+# Standard Time (i.e. not until 3:00 Central Daylight Time).
+
+# From Paul Eggert (2006-04-10):
+# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
+# starting 1966. Since 02:00s is clearly correct for 1967 on, assume
+# it was also 02:00s in 1966.
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Winn 1916 only - Apr 23 0:00 1:00 D
Rule Winn 1916 only - Sep 17 0:00 0 S
Rule Winn 1918 only - Oct 31 2:00 0 S
Rule Winn 1937 only - May 16 2:00 1:00 D
Rule Winn 1937 only - Sep 26 2:00 0 S
-Rule Winn 1942 only - Feb 9 2:00 1:00 W
+Rule Winn 1942 only - Feb 9 2:00 1:00 W # War
+Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace
Rule Winn 1945 only - Sep lastSun 2:00 0 S
Rule Winn 1946 only - May 12 2:00 1:00 D
Rule Winn 1946 only - Oct 13 2:00 0 S
Rule Winn 1960 only - Sep lastSun 2:00 0 S
Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
Rule Winn 1963 only - Sep 22 2:00 0 S
-Rule Winn 1966 1986 - Apr lastSun 2:00 1:00 D
-Rule Winn 1966 1986 - Oct lastSun 2:00 0 S
-Rule Winn 1987 max - Apr Sun>=1 2:00 1:00 D
-# From Paul Eggert (2000-10-02):
-# INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from
-# DST at 03:00 local time. For now, assume it started in 1987.
-Rule Winn 1987 max - Oct lastSun 2:00s 0 S
+Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D
+Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S
+Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
- -6:00 Winn C%sT
+ -6:00 Winn C%sT 2006
+ -6:00 Canada C%sT
# Saskatchewan
-# From Paul Eggert (2000-10-02):
-# Shanks writes that since 1970 most of this region has been like Regina.
+# From Mark Brader (2003-07-26):
+# The first actual adoption of DST in Canada was at the municipal
+# level. As the [Toronto] Star put it (1912-06-07), "While people
+# elsewhere have long been talking of legislation to save daylight,
+# the city of Moose Jaw [Saskatchewan] has acted on its own hook."
+# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
+# presumably late evening, as below), and would run until "the end of
+# the summer". The discrepancy between municipal time and railroad
+# time was noted.
+
+# From Paul Eggert (2003-07-27):
+# Willett (1914-03) notes that DST "has been in operation ... in the
+# City of Moose Jaw, Saskatchewan, for one year."
+
+# From Paul Eggert (2006-03-22):
+# Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
# Other western towns (e.g. Lloydminster) are like Edmonton.
# Matthews and Vincent (1998) write that Denare Beach and Creighton
# are like Winnipeg, in violation of Saskatchewan law.
-# From W. Jones <jones@skdad.usask.ca> (1992-11-06):
+# From W. Jones (1992-11-06):
# The. . .below is based on information I got from our law library, the
# provincial archives, and the provincial Community Services department.
# A precise history would require digging through newspaper archives, and
# rules any more; all other districts appear to have used CST year round
# since sometime in the 1960s.
+# From Chris Walton (2006-06-26):
+# The Saskatchewan time act which was last updated in 1996 is about 30 pages
+# long and rather painful to read.
+# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Regina 1918 only - Apr 14 2:00 1:00 D
Rule Regina 1918 only - Oct 31 2:00 0 S
Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
-Rule Regina 1942 only - Feb 9 2:00 1:00 W
+Rule Regina 1942 only - Feb 9 2:00 1:00 W # War
+Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace
Rule Regina 1945 only - Sep lastSun 2:00 0 S
Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D
Rule Regina 1946 only - Oct Sun>=8 2:00 0 S
-Rule Regina 1947 1959 - Apr lastSun 2:00 1:00 D
-Rule Regina 1947 1958 - Sep lastSun 2:00 0 S
+Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D
+Rule Regina 1947 1957 - Sep lastSun 2:00 0 S
+Rule Regina 1959 only - Apr lastSun 2:00 1:00 D
Rule Regina 1959 only - Oct lastSun 2:00 0 S
#
Rule Swift 1957 only - Apr lastSun 2:00 1:00 D
Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
Rule Edm 1920 only - Oct lastSun 2:00 0 S
Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
-Rule Edm 1942 only - Feb 9 2:00 1:00 W
+Rule Edm 1942 only - Feb 9 2:00 1:00 W # War
+Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace
Rule Edm 1945 only - Sep lastSun 2:00 0 S
Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
Rule Edm 1947 only - Sep lastSun 2:00 0 S
Rule Edm 1969 only - Apr lastSun 2:00 1:00 D
Rule Edm 1969 only - Oct lastSun 2:00 0 S
Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
-Rule Edm 1972 max - Oct lastSun 2:00 0 S
-Rule Edm 1987 max - Apr Sun>=1 2:00 1:00 D
+Rule Edm 1972 2006 - Oct lastSun 2:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Edmonton -7:33:52 - LMT 1906 Sep
- -7:00 Edm M%sT
+ -7:00 Edm M%sT 1987
+ -7:00 Canada M%sT
# British Columbia
-# From Paul Eggert (2000-10-02):
-# Shanks writes that since 1970 most of this region has been like Vancouver.
+# From Paul Eggert (2006-03-22):
+# Shanks & Pottenger write that since 1970 most of this region has
+# been like Vancouver.
# Dawson Creek uses MST. Much of east BC is like Edmonton.
# Matthews and Vincent (1998) write that Creston is like Dawson Creek.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Vanc 1918 only - Apr 14 2:00 1:00 D
Rule Vanc 1918 only - Oct 31 2:00 0 S
-Rule Vanc 1942 only - Feb 9 2:00 1:00 W
+Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War
+Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace
Rule Vanc 1945 only - Sep 30 2:00 0 S
Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
Rule Vanc 1946 only - Oct 13 2:00 0 S
Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
-Rule Vanc 1962 max - Oct lastSun 2:00 0 S
-Rule Vanc 1987 max - Apr Sun>=1 2:00 1:00 D
+Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Vancouver -8:12:28 - LMT 1884
- -8:00 Vanc P%sT
+ -8:00 Vanc P%sT 1987
+ -8:00 Canada P%sT
Zone America/Dawson_Creek -8:00:56 - LMT 1884
-8:00 Canada P%sT 1947
-8:00 Vanc P%sT 1972 Aug 30 2:00
# Northwest Territories, Nunavut, Yukon
-# From Paul Eggert (1999-10-29):
+# From Paul Eggert (2006-03-22):
# Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
-# Mathew Englander <mathew@io.org> (1996-10-07) gives the following refs:
+# Mathew Englander (1996-10-07) gives the following refs:
# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
# c. 7 defines Yukon standard time as UTC-9. This is still valid;
# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
# * O.I.C. 1980/02 established DST.
# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
-# Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander.
+# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go
+# with Englander.
+# From Chris Walton (2006-06-26):
+# Here is a link to the old daylight saving portion of the interpretation
+# act which was last updated in 1987:
+# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf
# From Rives McDow (1999-09-04):
# Nunavut ... moved ... to incorporate the whole territory into one time zone.
# </a> (1999) reports that Pangnirtung operates on eastern time,
# and that Coral Harbour does not observe DST. We don't know when
# Pangnirtung switched to eastern time; we'll guess 1995.
-# We'll ignore the claim about Coral Harbour for now,
-# since we have no further info.
# From Rives McDow (1999-11-08):
# On October 31, when the rest of Nunavut went to Central time,
# more.
# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
+# From Gwillim Law (2005-05-21):
+# According to maps at
+# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg
+# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg
+# (both dated 2003), and
+# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
+# (from a 1998 Canadian Geographic article), the de facto and de jure time
+# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
+# round. Using Google, it's easy to find other websites that confirm this.
+# I wasn't able to find how far back this time regimen goes, but since it
+# predates the creation of Nunavut, it probably goes back many years....
+# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
+#
+# From Paul Eggert (2005-07-26):
+# For lack of better information, assume that Southampton Island observed
+# daylight saving only during wartime.
+
+# From Chris Walton (2007-03-01):
+# ... the community of Resolute (located on Cornwallis Island in
+# Nunavut) moved from Central Time to Eastern Time last November.
+# Basically the community did not change its clocks at the end of
+# daylight saving....
+# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
+
+# From Chris Walton (2007-03-14):
+# Today I phoned the "hamlet office" to find out what Resolute was doing with
+# its clocks.
+#
+# The individual that answered the phone confirmed that the clocks did not
+# move at the end of daylight saving on October 29/2006. He also told me that
+# the clocks did not move this past weekend (March 11/2007)....
+#
+# America/Resolute should use the "Canada" Rule up to October 29/2006.
+# After that it should be fixed on Eastern Standard Time until further notice.
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
Rule NT_YK 1918 only - Oct 27 2:00 0 S
Rule NT_YK 1919 only - May 25 2:00 1:00 D
Rule NT_YK 1919 only - Nov 1 0:00 0 S
-Rule NT_YK 1942 only - Feb 9 2:00 1:00 W
+Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War
+Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace
Rule NT_YK 1945 only - Sep 30 2:00 0 S
Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD
Rule NT_YK 1965 only - Oct lastSun 2:00 0 S
Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D
-Rule NT_YK 1980 max - Oct lastSun 2:00 0 S
-Rule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D
+Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S
+Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone America/Pangnirtung -4:22:56 - LMT 1884
+# aka Panniqtuuq
+Zone America/Pangnirtung 0 - zzz 1921 # trading post est.
-4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00
-5:00 Canada E%sT 1999 Oct 31 2:00
-6:00 Canada C%sT 2000 Oct 29 2:00
-5:00 Canada E%sT
-Zone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay before 1987
+# formerly Frobisher Bay
+Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est.
-5:00 NT_YK E%sT 1999 Oct 31 2:00
-6:00 Canada C%sT 2000 Oct 29 2:00
-5:00 Canada E%sT
-Zone America/Rankin_Inlet -6:08:40 - LMT 1884
+# aka Qausuittuq
+Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded
+ -6:00 NT_YK C%sT 2000 Oct 29 2:00
+ -5:00 - EST 2001 Apr 1 3:00
+ -6:00 Canada C%sT 2006 Oct 29 2:00
+ -5:00 - EST
+# aka Kangiqiniq
+Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded
-6:00 NT_YK C%sT 2000 Oct 29 2:00
-5:00 - EST 2001 Apr 1 3:00
-6:00 Canada C%sT
-Zone America/Cambridge_Bay -7:00:20 - LMT 1884
+# aka Iqaluktuuttiaq
+Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.?
-7:00 NT_YK M%sT 1999 Oct 31 2:00
-6:00 Canada C%sT 2000 Oct 29 2:00
-5:00 - EST 2000 Nov 5 0:00
-6:00 - CST 2001 Apr 1 3:00
-7:00 Canada M%sT
-Zone America/Yellowknife -7:37:24 - LMT 1884
- -7:00 NT_YK M%sT
-Zone America/Inuvik -8:54:00 - LMT 1884
+Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded?
+ -7:00 NT_YK M%sT 1980
+ -7:00 Canada M%sT
+Zone America/Inuvik 0 - zzz 1953 # Inuvik founded
-8:00 NT_YK P%sT 1979 Apr lastSun 2:00
- -7:00 NT_YK M%sT
+ -7:00 NT_YK M%sT 1980
+ -7:00 Canada M%sT
Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
-9:00 NT_YK Y%sT 1966 Jul 1 2:00
- -8:00 NT_YK P%sT
+ -8:00 NT_YK P%sT 1980
+ -8:00 Canada P%sT
Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
-9:00 NT_YK Y%sT 1973 Oct 28 0:00
- -8:00 NT_YK P%sT
+ -8:00 NT_YK P%sT 1980
+ -8:00 Canada P%sT
###############################################################################
# history of Mexican local time (in Spanish)
# </a>.
#
-# Here are the discrepancies between Shanks and the MLoC.
+# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
# (In all cases we go with the MLoC.)
-# Shanks reports that Baja was at -8:00 in 1922/1923.
-# Shanks says the 1930 transition in Baja was 1930-11-16.
-# Shanks reports no DST during summer 1931.
-# Shanks reports a transition at 1032-03-30 23:00, not 1932-04-01.
-# Shanks does not report transitions for Baja in 1945 or 1948.
-# Shanks reports southern Mexico transitions on 1981-12-01, not 12-23.
-# Shanks says Quintana Roo switched to -6:00 on 1982-12-02, and to -5:00
-# on 1997-10-26 at 02:00.
+# S&P report that Baja was at -8:00 in 1922/1923.
+# S&P say the 1930 transition in Baja was 1930-11-16.
+# S&P report no DST during summer 1931.
+# S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
# From Gwillim Law (2001-02-20):
# There are some other discrepancies between the Decrees page and the
# the researchers who prepared the Decrees page failed to find some of
# the relevant documents.
-# From Paul Eggert (2000-07-26):
-# Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981
-# and 1988 DST experiments. Go with spin.com.mx.
-
-# From Alan Perry <alan.perry@eng.sun.com> (1996-02-15):
+# From Alan Perry (1996-02-15):
# A guy from our Mexico subsidiary finally found the Presidential Decree
# outlining the timezone changes in Mexico.
#
Rule Mexico 1939 only - Jun 25 0:00 0 S
Rule Mexico 1940 only - Dec 9 0:00 1:00 D
Rule Mexico 1941 only - Apr 1 0:00 0 S
-Rule Mexico 1943 only - Dec 16 0:00 1:00 W
+Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War
Rule Mexico 1944 only - May 1 0:00 0 S
Rule Mexico 1950 only - Feb 12 0:00 1:00 D
Rule Mexico 1950 only - Jul 30 0:00 0 S
-8:00 - PST 1931 Apr 1
-8:00 1:00 PDT 1931 Sep 30
-8:00 - PST 1942 Apr 24
- -8:00 1:00 PWT 1945 Nov 12
+ -8:00 1:00 PWT 1945 Aug 14 23:00u
+ -8:00 1:00 PPT 1945 Nov 12 # Peace
-8:00 - PST 1948 Apr 5
-8:00 1:00 PDT 1949 Jan 14
-8:00 - PST 1954
-8:00 Mexico P%sT 2001
-8:00 US P%sT 2002 Feb 20
-8:00 Mexico P%sT
-# From Paul Eggert (2001-03-05):
+# From Paul Eggert (2006-03-22):
# Formerly there was an America/Ensenada zone, which differed from
# America/Tijuana only in that it did not observe DST from 1976
-# through 1995. This was as per Shanks. However, Guy Harris reports
+# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say
+# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports
# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and
-# Tijuana observe DST," which contradicts Shanks but does imply that
+# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
# DST-observance was a town-by-town matter back then. This concerns
# data after 1970 so most likely there should be at least one Zone
# other than America/Tijuana for Baja, but it's not clear yet what its
-4:00 - AST
# Bahamas
+#
+# From Sue Williams (2006-12-07):
+# The Bahamas announced about a month ago that they plan to change their DST
+# rules to sync with the U.S. starting in 2007....
+# http://www.jonesbahamas.com/?c=45&a=10412
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule Bahamas 1964 max - Oct lastSun 2:00 0 S
+Rule Bahamas 1964 2006 - Oct lastSun 2:00 0 S
Rule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D
-Rule Bahamas 1987 max - Apr Sun>=1 2:00 1:00 D
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Nassau -5:09:24 - LMT 1912 Mar 2
- -5:00 Bahamas E%sT
+ -5:00 Bahamas E%sT 1976
+ -5:00 US E%sT
# Barbados
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-4:00 Barb A%sT
# Belize
-# Whitman entirely disagrees with Shanks; go with Shanks.
+# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD
Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S
-6:00 Belize C%sT
# Bermuda
+
+# From Dan Jones, reporting in The Royal Gazette (2006-06-26):
+
+# Next year, however, clocks in the US will go forward on the second Sunday
+# in March, until the first Sunday in November. And, after the Time Zone
+# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
+# Friday, the same thing will happen in Bermuda.
+# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
+
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton
-4:00 - AST 1974 Apr 28 2:00
- -4:00 Bahamas A%sT
+ -4:00 Bahamas A%sT 1976
+ -4:00 US A%sT
# Cayman Is
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
-# IATA SSIM (1991-09) says the following was at 1:00; go with Shanks.
+# IATA SSIM (1991-09) says the following was at 1:00;
+# go with Shanks & Pottenger.
Rule CR 1991 only - Jul 1 0:00 0 S
Rule CR 1992 only - Mar 15 0:00 0 S
# There are too many San Joses elsewhere, so we'll use `Costa Rica'.
# to DST--and one more hour on 1999-04-04--when the announcers will have
# returned to Baltimore, which switches on that date.)
+# From Evert van der Veer via Steffen Thorsen (2004-10-28):
+# Cuba is not going back to standard time this year.
+# From Paul Eggert (2006-03-22):
+# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
+# says that it's due to a problem at the Antonio Guiteras
+# thermoelectric plant, and says "This October there will be no return
+# to normal hours (after daylight saving time)".
+# For now, let's assume that it's a temporary measure.
+
+# From Carlos A. Carnero Delgado (2005-11-12):
+# This year (just like in 2004-2005) there's no change in time zone
+# adjustment in Cuba. We will stay in daylight saving time:
+# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
+
+# From Jesper Norgaard Welen (2006-10-21):
+# An article in GRANMA INTERNACIONAL claims that Cuba will end
+# the 3 years of permanent DST next weekend, see
+# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
+# "On Saturday night, October 28 going into Sunday, October 29, at 01:00,
+# watches should be set back one hour -- going back to 00:00 hours -- returning
+# to the normal schedule....
+
+# From Paul Eggert (2007-03-02):
+# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday,
+# says Cuban clocks will advance at midnight on March 10.
+# For lack of better information, assume Cuba will use US rules,
+# except that it switches at midnight standard time as usual.
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Cuba 1928 only - Jun 10 0:00 1:00 D
Rule Cuba 1928 only - Oct 10 0:00 0 S
Rule Cuba 1996 only - Oct 6 0:00s 0 S
Rule Cuba 1997 only - Oct 12 0:00s 0 S
Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D
-Rule Cuba 1998 max - Oct lastSun 0:00s 0 S
-Rule Cuba 2000 max - Apr Sun>=1 0:00s 1:00 D
+Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S
+Rule Cuba 2000 2006 - Apr Sun>=1 0:00s 1:00 D
+Rule Cuba 2006 only - Oct lastSun 0:00s 0 S
+Rule Cuba 2007 max - Mar Sun>=8 0:00s 1:00 D
+Rule Cuba 2007 max - Nov Sun>=1 0:00s 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Havana -5:29:28 - LMT 1890
-4:00 - AST
# El Salvador
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
-# There are too many San Salvadors elsewhere, so we'll use `El Salvador'.
+# There are too many San Salvadors elsewhere, so use America/El_Salvador
+# instead of America/San_Salvador.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
-6:00 Salv C%sT
-4:00 - AST
# Guatemala
+#
+# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
+# Diario Co Latino, at
+# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079,
+# says in an article dated 2006-04-19 that the Guatemalan government had
+# decided on that date to advance official time by 60 minutes, to lessen the
+# impact of the elevated cost of oil.... Daylight saving time will last from
+# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
+# From Paul Eggert (2006-06-22):
+# The Ministry of Energy and Mines, press release CP-15/2006
+# (2006-04-19), says DST ends at 24:00. See
+# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>.
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Guat 1973 only - Nov 25 0:00 1:00 D
Rule Guat 1974 only - Feb 24 0:00 0 S
Rule Guat 1983 only - Sep 22 0:00 0 S
Rule Guat 1991 only - Mar 23 0:00 1:00 D
Rule Guat 1991 only - Sep 7 0:00 0 S
+Rule Guat 2006 only - Apr 30 0:00 1:00 D
+Rule Guat 2006 only - Oct 1 0:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
-6:00 Guat C%sT
# Haiti
+# From Gwillim Law (2005-04-15):
+# Risto O. Nykanen wrote me that Haiti is now on DST.
+# I searched for confirmation, and I found a
+# <a href="http://www.haitianconsulate.org/time.doc"> press release
+# on the Web page of the Haitian Consulate in Chicago (2005-03-31),
+# </a>. Translated from French, it says:
+#
+# "The Prime Minister's Communication Office notifies the public in general
+# and the press in particular that, following a decision of the Interior
+# Ministry and the Territorial Collectivities [I suppose that means the
+# provinces], Haiti will move to Eastern Daylight Time in the night from next
+# Saturday the 2nd to Sunday the 3rd.
+#
+# "Consequently, the Prime Minister's Communication Office wishes to inform
+# the population that the country's clocks will be set forward one hour
+# starting at midnight. This provision will hold until the last Saturday in
+# October 2005.
+#
+# "Port-au-Prince, March 31, 2005"
+#
+# From Steffen Thorsen (2006-04-04):
+# I have been informed by users that Haiti observes DST this year like
+# last year, so the current "only" rule for 2005 might be changed to a
+# "max" rule or to last until 2006. (Who knows if they will observe DST
+# next year or if they will extend their DST like US/Canada next year).
+#
+# I have found this article about it (in French):
+# http://www.haitipressnetwork.com/news.cfm?articleID=7612
+#
+# The reason seems to be an energy crisis.
+
+# From Stephen Colebourne (2007-02-22):
+# Some IATA info: Haiti won't be having DST in 2007.
+
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Haiti 1983 only - May 8 0:00 1:00 D
Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
-# Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. Go with IATA.
+# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
+# Go with IATA.
Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
+Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D
+Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Port-au-Prince -4:49:20 - LMT 1890
-4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
-5:00 Haiti E%sT
# Honduras
-# Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1.
+# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
+
+# From Paul Eggert (2006-05-05):
+# worldtimezone.com reports a 2006-05-02 Spanish-language AP article
+# saying Honduras will start using DST midnight Saturday, effective 4
+# months until September. La Tribuna reported today
+# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
+# of Honduras, refused to back down on this.
+
+# From Jesper Norgaard Welen (2006-08-08):
+# It seems that Honduras has returned from DST to standard time this Monday at
+# 00:00 hours (prolonging Sunday to 25 hours duration).
+# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
+
+# From Paul Eggert (2006-08-08):
+# Also see Diario El Heraldo, The country returns to standard time (2006-08-08)
+# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>.
+# It mentions executive decree 18-2006.
+
+# From Steffen Thorsen (2006-08-17):
+# Honduras will observe DST from 2007 to 2009, exact dates are not
+# published, I have located this authoritative source:
+# http://www.presidencia.gob.hn/noticia.aspx?nId=47
+
+# From Steffen Thorsen (2007-03-30):
+# http://www.laprensahn.com/pais_nota.php?id04962=7386
+# So it seems that Honduras will not enter DST this year....
+
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
+Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D
+Rule Hond 1987 1988 - Sep lastSun 0:00 0 S
+Rule Hond 2006 only - May Sun>=1 0:00 1:00 D
+Rule Hond 2006 only - Aug Mon>=1 0:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
- -6:00 Salv C%sT
+ -6:00 Hond C%sT
#
# Great Swan I ceded by US to Honduras in 1972
# From U. S. Naval Observatory (1989-01-19):
# JAMAICA 5 H BEHIND UTC
-# From Shanks:
+# From Shanks & Pottenger:
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston
-5:07:12 - KMT 1912 Feb # Kingston Mean Time
-4:00 - AST
# Montserrat
-# From Paul Eggert (1997-08-31):
-# Recent volcanic eruptions have forced evacuation of Plymouth, the capital.
-# Luckily, Olveston, the current de facto capital, has the same longitude.
+# From Paul Eggert (2006-03-22):
+# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital.
+# world.gazetteer.com says Cork Hill is the most populous location now.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston
+Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill
-4:00 - AST
# Nicaragua
#
-# From Steffen Thorsen (1998-12-29):
-# Nicaragua seems to be back at -6:00 but I have not been able to find when
-# they changed from -5:00.
+# This uses Shanks & Pottenger for times before 2005.
+#
+# From Steffen Thorsen (2005-04-12):
+# I've got reports from 8 different people that Nicaragua just started
+# DST on Sunday 2005-04-10, in order to save energy because of
+# expensive petroleum. The exact end date for DST is not yet
+# announced, only "September" but some sites also say "mid-September".
+# Some background information is available on the President's official site:
+# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
+# The Decree, no 23-2005 is available here:
+# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf
+#
+# From Paul Eggert (2005-05-01):
+# The decree doesn't say anything about daylight saving, but for now let's
+# assume that it is daylight saving....
+#
+# From Gwillim Law (2005-04-21):
+# The Associated Press story on the time change, which can be found at
+# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
+# and elsewhere, says (fifth paragraph, translated from Spanish): "The last
+# time that a change of clocks was applied to save energy was in the year 2000
+# during the Arnoldo Aleman administration."...
+# The northamerica file says that Nicaragua has been on UTC-6 continuously
+# since December 1998. I wasn't able to find any details of Nicaraguan time
+# changes in 2000. Perhaps a note could be added to the northamerica file, to
+# the effect that we have indirect evidence that DST was observed in 2000.
+#
+# From Jesper Norgaard Welen (2005-11-02):
+# Nicaragua left DST the 2005-10-02 at 00:00 (local time).
+# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
+# (2005-09-26)
+#
+# From Jesper Norgaard Welen (2006-05-05):
+# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
+# (my informal translation)
+# By order of the president of the republic, Enrique Bolanos, Nicaragua
+# advanced by sixty minutes their official time, yesterday at 2 in the
+# morning, and will stay that way until 30.th. of september.
+#
+# From Jesper Norgaard Welen (2006-09-30):
+# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
+# My informal translation runs:
+# The natural sun time is restored in all the national territory, in that the
+# time is returned one hour at 01:00 am of October 1 of 2006.
#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
-Rule Nic 1992 only - Jan 1 4:00 1:00 D
-Rule Nic 1992 only - Sep 24 0:00 0 S
+Rule Nic 2005 only - Apr 10 0:00 1:00 D
+Rule Nic 2005 only - Oct Sun>=1 0:00 0 S
+Rule Nic 2006 only - Apr 30 2:00 1:00 D
+Rule Nic 2006 only - Oct Sun>=1 1:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Managua -5:45:08 - LMT 1890
-5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?
-6:00 - CST 1973 May
-5:00 - EST 1975 Feb 16
- -6:00 Nic C%sT 1993 Jan 1 4:00
- -5:00 - EST 1998 Dec
- -6:00 - CST
+ -6:00 Nic C%sT 1992 Jan 1 4:00
+ -5:00 - EST 1992 Sep 24
+ -6:00 - CST 1993
+ -5:00 - EST 1997
+ -6:00 Nic C%sT
# Panama
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
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 AWT 1945 Sep 30 2:00
+ -4:00 US A%sT 1946
-4:00 - AST
# St Kitts-Nevis
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
-4:00 - AST 1980 May
- -3:00 Mont PM%sT # Pierre & Miquelon Time
+ -3:00 - PMST 1987 # Pierre & Miquelon Time
+ -3:00 Canada PM%sT
# St Vincent and the Grenadines
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-4:00 - AST
# Turks and Caicos
-# From Paul Eggert (1998-08-06):
-# Shanks says they use US DST rules, but IATA SSIM (1991/1998)
-# says they switch at midnight. Go with IATA SSIM.
+#
+# From Chris Dunn in
+# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007>
+# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
+# daylight saving dates for time changes have been adjusted to match
+# the recent U.S. change of dates.
+#
+# From Brian Inglis (2007-04-28):
+# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
+# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
+# rows before that there is an out of date entry for Oct:
+# "Eastern Standard Times Begins 2007
+# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
+# indicating that the normal ET rules are followed.
+#
+# From Paul Eggert (2006-05-01):
+# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998)
+# says they switch at midnight. Go with Shanks & Pottenger.
+#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule TC 1979 1986 - Apr lastSun 0:00 1:00 D
-Rule TC 1979 max - Oct lastSun 0:00 0 S
-Rule TC 1987 max - Apr Sun>=1 0:00 1:00 D
+Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D
+Rule TC 1979 2006 - Oct lastSun 2:00 0 S
+Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D
+Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D
+Rule TC 2007 max - Nov Sun>=1 2:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Grand_Turk -4:44:32 - LMT 1890
-5:07:12 - KMT 1912 Feb # Kingston Mean Time
projects / platform / upstream / glibc.git / blobdiff