make/data/tzdata/northamerica
changeset 47724 6b374b7fdc3d
parent 47216 71c04702a3d5
child 48716 55272cc70514
--- a/make/data/tzdata/northamerica	Tue Nov 07 23:18:16 2017 +0100
+++ b/make/data/tzdata/northamerica	Thu Nov 09 14:38:54 2017 +0530
@@ -128,10 +128,13 @@
 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
 # In the introduction, Oboler spoke of "Eastern Peace Time."
 # An AltaVista search turned up:
-# http://rowayton.org/rhs/hstaug45.html
+# https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html
 # "When the time is announced over the radio now, it is 'Eastern Peace
 # Time' instead of the old familiar 'Eastern War Time.'  Peace is wonderful."
 # (August 1945) by way of confirmation.
+#
+# From Paul Eggert (2017-09-23):
+# This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter.
 
 # From Joseph Gallant citing
 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
@@ -280,7 +283,7 @@
 # HST and HDT are standardized abbreviations for Hawaii-Aleutian
 # standard and daylight times.  See section 9.47 (p 234) of the
 # U.S. Government Printing Office Style Manual (2008)
-# http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf
+# https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf
 
 # From Arthur David Olson, 2005-08-09
 # The following was signed into law on 2005-08-08.
@@ -369,7 +372,7 @@
 # western Tennessee, most of Texas, Wisconsin
 
 # From Larry M. Smith (2006-04-26) re Wisconsin:
-# http://www.legis.state.wi.us/statutes/Stat0175.pdf ...
+# https://docs.legis.wisconsin.gov/statutes/statutes/175.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
@@ -378,7 +381,7 @@
 # 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
+# https://docs.legis.wisconsin.gov/2007/related/acts/3
 
 # From an email administrator of the City of Fort Pierre, SD (2015-12-21):
 # Fort Pierre is technically located in the Mountain time zone as is
@@ -425,7 +428,7 @@
 # ...it appears that Mercer County, North Dakota, changed from the
 # mountain time zone to the central time zone at the last transition from
 # daylight-saving to standard time (on Nov. 7, 2010):
-# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
+# https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
 # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html
 
 # From Andy Lipscomb (2011-01-24):
@@ -476,7 +479,7 @@
 # legal time, and is not part of the data here.)  See:
 # Ross SA. An energy crisis from the past: Northern California in 1948.
 # Working Paper No. 8, Institute of Governmental Studies, UC Berkeley,
-# 1973-11.  http://escholarship.org/uc/item/8x22k30c
+# 1973-11.  https://escholarship.org/uc/item/8x22k30c
 #
 # In another measure to save electricity, DST was instituted from 1948-03-14
 # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move
@@ -497,8 +500,8 @@
 # which established DST from April's last Sunday at 01:00 until September's
 # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed
 # the fall-back date to October's last Sunday. See:
-# http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props
-# http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props
+# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props
+# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props
 #
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
 Rule	CA	1948	only	-	Mar	14	2:01	1:00	D
@@ -515,20 +518,31 @@
 # Alaska
 # AK%sT is the modern abbreviation for -09 per USNO.
 #
-# From Paul Eggert (2001-05-30):
+# From Paul Eggert (2017-06-15):
 # Howse writes that Alaska switched from the Julian to the Gregorian calendar,
 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
-# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
-# also a Friday.  Include only the time zone part of this transition,
-# ignoring the switch from Julian to Gregorian, since we can't represent
-# the Julian calendar.
+# On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the
+# Russian forts and fleet at Sitka fired salutes to mark the ceremony of
+# formal transfer.  See the Sacramento Daily Union (1867-11-14), p 3, col 2.
+# https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1
+# Sitka workers did not change their calendars until Sunday, 1867-10-20,
+# and so celebrated two Sundays that week.  See: Ahllund T (tr Hallamaa P).
+# From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25.
+# http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf
+# Include only the time zone part of this transition, ignoring the switch
+# from Julian to Gregorian, since we can't represent the Julian calendar.
 #
-# As far as we know, none of the exact locations mentioned below were
+# As far as we know, of the locations mentioned below only Sitka was
 # permanently inhabited in 1867 by anyone using either calendar.
-# (Yakutat was colonized by the Russians in 1799, but the settlement
-# was destroyed in 1805 by a Yakutat-kon war party.)  However, there
-# were nearby inhabitants in some cases and for our purposes perhaps
-# it's best to simply use the official transition.
+# (Yakutat was colonized by the Russians in 1799, but the settlement was
+# destroyed in 1805 by a Yakutat-kon war party.)  Many of Alaska's inhabitants
+# were unaware of the US acquisition of Alaska, much less of any calendar or
+# time change.  However, the Russian-influenced part of Alaska did observe
+# Russian time, and it is more accurate to model this than to ignore it.
+# The database format requires an exact transition time; use the Russian
+# salute as a somewhat-arbitrary time for the formal transfer of control for
+# all of Alaska.  Sitka's UTC offset is -9:01:13; adjust its 15:30 to the
+# local times of other Alaskan locations so that they change simultaneously.
 
 # From Paul Eggert (2014-07-18):
 # One opinion of the early-1980s turmoil in Alaska over time zones and
@@ -581,10 +595,10 @@
 # It seems Metlakatla did go off PST on Sunday, November 1, changing
 # their time to AKST and are going to follow Alaska's DST, switching
 # between AKST and AKDT from now on....
-# http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
+# https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone America/Juneau	 15:02:19 -	LMT	1867 Oct 18
+Zone America/Juneau	 15:02:19 -	LMT	1867 Oct 19 15:33:32
 			 -8:57:41 -	LMT	1900 Aug 20 12:00
 			 -8:00	-	PST	1942
 			 -8:00	US	P%sT	1946
@@ -594,7 +608,7 @@
 			 -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/Sitka	 14:58:47 -	LMT	1867 Oct 18
+Zone America/Sitka	 14:58:47 -	LMT	1867 Oct 19 15:30
 			 -9:01:13 -	LMT	1900 Aug 20 12:00
 			 -8:00	-	PST	1942
 			 -8:00	US	P%sT	1946
@@ -602,7 +616,7 @@
 			 -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/Metlakatla	 15:13:42 -	LMT	1867 Oct 18
+Zone America/Metlakatla	 15:13:42 -	LMT	1867 Oct 19 15:44:55
 			 -8:46:18 -	LMT	1900 Aug 20 12:00
 			 -8:00	-	PST	1942
 			 -8:00	US	P%sT	1946
@@ -610,14 +624,14 @@
 			 -8:00	US	P%sT	1983 Oct 30  2:00
 			 -8:00	-	PST	2015 Nov  1  2:00
 			 -9:00	US	AK%sT
-Zone America/Yakutat	 14:41:05 -	LMT	1867 Oct 18
+Zone America/Yakutat	 14:41:05 -	LMT	1867 Oct 19 15:12:18
 			 -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 Nov 30
 			 -9:00	US	AK%sT
-Zone America/Anchorage	 14:00:24 -	LMT	1867 Oct 18
+Zone America/Anchorage	 14:00:24 -	LMT	1867 Oct 19 14:31:37
 			 -9:59:36 -	LMT	1900 Aug 20 12:00
 			-10:00	-	AST	1942
 			-10:00	US	A%sT	1967 Apr
@@ -625,7 +639,7 @@
 			-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
+Zone America/Nome	 12:58:22 -	LMT	1867 Oct 19 13:29:35
 			-11:01:38 -	LMT	1900 Aug 20 12:00
 			-11:00	-	NST	1942
 			-11:00	US	N%sT	1946
@@ -634,7 +648,7 @@
 			-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
+Zone America/Adak	 12:13:22 -	LMT	1867 Oct 19 12:44:35
 			-11:46:38 -	LMT	1900 Aug 20 12:00
 			-11:00	-	NST	1942
 			-11:00	US	N%sT	1946
@@ -670,7 +684,7 @@
 # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225
 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,
 # the article is available at
-# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf
+# https://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf
 # and indicates that standard time was adopted effective noon, January
 # 13, 1896 (page 218), that in "1933, the Legislature decreed daylight
 # saving for the period between the last Sunday of each April and the
@@ -769,7 +783,7 @@
 # Indiana
 #
 # For a map of Indiana's time zone regions, see:
-# http://en.wikipedia.org/wiki/Time_in_Indiana
+# https://en.wikipedia.org/wiki/Time_in_Indiana
 #
 # From Paul Eggert (2007-08-17):
 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
@@ -996,7 +1010,7 @@
 # From Paul Eggert (2001-07-16):
 # The final rule was published in the
 # Federal Register 65, 160 (2000-08-17), pp 50154-50158.
-# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22
+# https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm
 #
 Zone America/Kentucky/Monticello -5:39:24 - LMT	1883 Nov 18 12:20:36
 			-6:00	US	C%sT	1946
@@ -1022,7 +1036,7 @@
 # West Wendover, NV officially switched from Pacific to mountain time on
 # 1999-10-31.  See the
 # Federal Register 64, 203 (1999-10-21), pp 56705-56707.
-# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15
+# https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm
 # However, the Federal Register says that West Wendover already operated
 # on mountain time, and the rule merely made this official;
 # hence a separate tz entry is not needed.
@@ -1052,12 +1066,23 @@
 # one hour in 1914."  This change is not in Shanks.  We have no more
 # info, so omit this for now.
 #
+# From Paul Eggert (2017-07-26):
+# Although Shanks says Detroit observed DST in 1967 from 06-14 00:01
+# until 10-29 00:01, I now see multiple reports that this is incorrect.
+# For example, according to a 50-year anniversary report about the 1967
+# Detroit riots and a major-league doubleheader on 1967-07-23, "By the time
+# the last fly ball of the doubleheader settled into the glove of leftfielder
+# Lenny Green, it was after 7 p.m.  Detroit did not observe daylight saving
+# time, so light was already starting to fail.  Twilight was made even deeper
+# by billowing columns of smoke that ascended in an unbroken wall north of the
+# ballpark."  See: Dow B. Detroit '67: As violence unfolded, Tigers played two
+# at home vs. Yankees. Detroit Free Press 2017-07-23.
+# https://www.freep.com/story/sports/mlb/tigers/2017/07/23/detroit-tigers-1967-riot-new-york-yankees/499951001/
+#
 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
 Rule	Detroit	1948	only	-	Apr	lastSun	2:00	1:00	D
 Rule	Detroit	1948	only	-	Sep	lastSun	2:00	0	S
-Rule	Detroit	1967	only	-	Jun	14	2:00	1:00	D
-Rule	Detroit	1967	only	-	Oct	lastSun	2:00	0	S
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone America/Detroit	-5:32:11 -	LMT	1905
 			-6:00	-	CST	1915 May 15  2:00
@@ -1121,7 +1146,7 @@
 #	[PDF] (1914-03)
 #
 #	Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
-#	<http://www.jstor.org/stable/1774359>.
+#	<https://www.jstor.org/stable/1774359>.
 #
 # See the 'europe' file for Greenland.
 
@@ -1167,19 +1192,19 @@
 # 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
+# https://archive.news.gov.bc.ca/releases/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
+# https://www.novascotia.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
+# https://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
+# https://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
@@ -1193,7 +1218,7 @@
 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
 # ...
 # Yukon
-# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
+# https://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
@@ -1214,8 +1239,8 @@
 # time and daylight saving time arrangements in Canada circa 1998.
 #
 # National Research Council Canada maintains info about time zones and DST.
-# http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html
-# http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5
+# https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html
+# https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5
 # Its unofficial information is often taken from Matthews and Vincent.
 
 # From Paul Eggert (2006-06-27):
@@ -1252,11 +1277,13 @@
 
 # Newfoundland and Labrador
 
-# From Paul Eggert (2000-10-02):
-# Matthews and Vincent (1998) write that Labrador should use NST/NDT,
-# but the only part of Labrador that follows the rules is the
-# southeast corner, including Port Hope Simpson and Mary's Harbour,
-# but excluding, say, Black Tickle.
+# From Paul Eggert (2017-10-14):
+# Legally Labrador should observe Newfoundland time; see:
+# McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07
+# http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/
+# Matthews and Vincent (1998) write that the only part of Labrador
+# that follows the rules is the southeast corner, including Port Hope
+# Simpson and Mary's Harbour, but excluding, say, Black Tickle.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	StJohns	1917	only	-	Apr	 8	2:00	1:00	D
@@ -1456,7 +1483,7 @@
 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
 # that the coastal strip from just east of Natashquan to Blanc-Sablon
 # observes Atlantic standard time all year round.
-# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
+# https://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
 # 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.
@@ -1488,6 +1515,11 @@
 # earlier in June).
 #
 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
+#
+# From Paul Eggert (2017-07-08):
+# For more on Orillia, see: Daubs K. Bold attempt at daylight saving
+# time became a comic failure in Orillia. Toronto Star 2017-07-08.
+# https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html
 
 # From Paul Eggert (1997-10-17):
 # Mark Brader writes that an article in the 1997-10-14 Toronto Star
@@ -1979,7 +2011,7 @@
 #	* 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
 #	c. 7 defines Yukon standard time as UTC-9....
 #	see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
-#	[http://canlii.ca/t/7vhg]
+#	[https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html]
 #	* 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.
@@ -2044,7 +2076,7 @@
 #     hours behind Greenwich Time.
 #
 # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
-#   http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
+#   https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
 #   C.O. 1973/214 INTERPRETATION ACT ...
 #
 #     1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
@@ -2059,7 +2091,7 @@
 #   http://? - no online source found
 #
 # * Yukon Daylight Saving Time, YOIC 1987/56
-#   http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
+#   https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
 #   O.I.C. 1987/056 INTERPRETATION ACT ...
 #
 #   In every year between
@@ -2071,7 +2103,7 @@
 #   Dated ... 9th day of March, A.D., 1987.
 #
 # * Yukon Daylight Saving Time 2006, YOIC 2006/127
-#   http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
+#   https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
 #   O.I.C. 2006/127 INTERPRETATION ACT ...
 #
 #     1. In Yukon each year the time for general purposes shall be 7 hours
@@ -2085,7 +2117,7 @@
 #     3. This order comes into force January 1, 2007.
 #
 # * Interpretation Act, RSY 2002, c 125
-# http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
+# https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
 
 # From Rives McDow (1999-09-04):
 # Nunavut ... moved ... to incorporate the whole territory into one time zone.
@@ -2128,7 +2160,7 @@
 
 # From Michaela Rodrigue, writing in the
 # Nunatsiaq News (1999-11-19):
-# http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html
+# http://www.nunatsiaqonline.ca/archives/nunavut991130/nvt91119_17.html
 # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
 # central - or Nunavut time - for government offices, and eastern time
 # for municipal offices and schools....  Igloolik [was similar but then]
@@ -2146,7 +2178,7 @@
 # Central Time and Southampton Island [in the Central zone] is not
 # required to use daylight savings.
 
-# From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html>
+# From <http://www.nunatsiaqonline.ca/archives/nunavut001130/nvt21110_02.html>
 # Nunavut now has two time zones (2000-11-10):
 # The Nunavut government would allow its employees in Kugluktuk and
 # Cambridge Bay to operate on central time year-round, putting them
@@ -2477,7 +2509,7 @@
 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
 #
 # Our page:
-# http://www.timeanddate.com/news/time/north-mexico-dst-change.html
+# https://www.timeanddate.com/news/time/north-mexico-dst-change.html
 
 # From Arthur David Olson (2010-01-20):
 # The page
@@ -2896,7 +2928,7 @@
 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
 #
 # Some more background information is posted here:
-# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
+# https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
 #
 # The article also says that Cuba has been observing DST since 1963,
 # while Shanks (and tzdata) has 1965 as the first date (except in the
@@ -2943,7 +2975,7 @@
 # http://granma.co.cu/2011/03/08/nacional/artic01.html
 #
 # Our info:
-# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
+# https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
 #
 # From Steffen Thorsen (2011-10-30)
 # Cuba will end DST two weeks later this year. Instead of going back
@@ -2953,7 +2985,7 @@
 # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html
 #
 # Our page:
-# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html
+# https://www.timeanddate.com/news/time/cuba-time-changes-2011.html
 #
 # From Steffen Thorsen (2012-03-01)
 # According to Radio Reloj, Cuba will start DST on Midnight between March
@@ -2963,7 +2995,7 @@
 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril
 #
 # Our info on it:
-# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
+# https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
 
 # From Steffen Thorsen (2012-11-03):
 # Radio Reloj and many other sources report that Cuba is changing back
@@ -3158,8 +3190,8 @@
 # From Steffen Thorsen (2016-03-12):
 # Jean Antoine, editor of www.haiti-reference.com informed us that Haiti
 # are not going on DST this year.  Several other resources confirm this: ...
-# http://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html
-# http://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/
+# https://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html
+# https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/
 # http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/
 
 # From Steffen Thorsen (2017-03-12):
@@ -3358,7 +3390,7 @@
 # Turks and Caicos
 #
 # From Chris Dunn in
-# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007
+# https://bugs.debian.org/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.
@@ -3380,12 +3412,25 @@
 # "permanent daylight saving time" by one year....
 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
 #
+# From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen:
+# ... agreed to the reintroduction in TCI of Daylight Saving Time (DST)
+# during the summer months and Standard Time, also known as Local
+# Time, during the winter months with effect from April 2018 ...
+# https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3
+#
+# From Paul Eggert (2017-08-26):
+# The date of effect of the spring 2018 change appears to be March 11,
+# which makes more sense.  See: Hamilton D. Time change back
+# by March 2018 for TCI. Magnetic Media. 2017-08-25.
+# http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/
+#
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone America/Grand_Turk	-4:44:32 -	LMT	1890
 			-5:07:11 -	KMT	1912 Feb # Kingston Mean Time
 			-5:00	-	EST	1979
 			-5:00	US	E%sT	2015 Nov Sun>=1 2:00
-			-4:00	-	AST
+			-4:00	-	AST	2018 Mar 11 3:00
+			-5:00	US	E%sT
 
 # British Virgin Is
 # Virgin Is