proposed tz changes for Haiti, Turks&Caicos, New Zealand, Caprivi

Paul Eggert eggert at CS.UCLA.EDU
Tue May 1 23:51:51 UTC 2007


Thanks for all those heads-ups about New Zealand.  In nosing around
the web I think Haiti has probably changed to not use DST, so let's go
with that change too (it's the most pressing, as it affects today's
time stamps).  Here are all the changes that I have accumulated, not
counting the proposed zic.c change already discussed.

Changes affecting current time stamps:

* Haiti no longer observes DST.  (Thanks to Stephen Colebourne for this.)

Changes affecting past and future time stamps:

* The Turks and Caicos switch at 02:00, not at 00:00, and have adopted
  US DST rules.  (Thanks to Chris Dunn and Brian Inglis for this.)

Changes affecting future time stamps only:

* New Zealand is extending DST, starting later this year.
  (Thanks to Colin Sharples and many others for this info.)

Changes affecting commentary only:

* The Caprivi Strip unofficially does not observe DST, but we currently
  have no further details.  (Thanks to Petronella Sibeene for this.)

===================================================================
RCS file: RCS/africa,v
retrieving revision 2007.1
retrieving revision 2007.1.0.1
diff -pu -r2007.1 -r2007.1.0.1
--- africa	2007/01/08 17:24:41	2007.1
+++ africa	2007/05/01 23:50:26	2007.1.0.1
@@ -416,6 +416,20 @@ Zone	Africa/Maputo	2:10:20 -	LMT	1903 Ma
 # Namibia
 # The 1994-04-03 transition is from Shanks & Pottenger.
 # Shanks & Pottenger report no DST after 1998-04; go with IATA.
+
+# From Petronella Sibeene (2007-03-30) in
+# <http://allafrica.com/stories/200703300178.html>:
+# While the entire country changes its time, Katima Mulilo and other
+# settlements in Caprivi unofficially will not because the sun there
+# rises and sets earlier compared to other regions.  Chief of
+# Forecasting Riaan van Zyl explained that the far eastern parts of
+# the country are close to 40 minutes earlier in sunrise than the rest
+# of the country.
+# 
+# From Paul Eggert (2007-03-31):
+# Apparently the Caprivi Strip informally observes Botswana time, but
+# we have no details.  In the meantime people there can use Africa/Gaborone.
+
 # RULE	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Namibia	1994	max	-	Sep	Sun>=1	2:00	1:00	S
 Rule	Namibia	1995	max	-	Apr	Sun>=1	2:00	0	-
===================================================================
RCS file: RCS/australasia,v
retrieving revision 2007.4
retrieving revision 2007.4.0.1
diff -pu -r2007.4 -r2007.4.0.1
--- australasia	2007/03/20 12:48:12	2007.4
+++ australasia	2007/05/01 23:50:26	2007.4.0.1
@@ -348,10 +348,14 @@ Rule	NZ	1976	1989	-	Mar	Sun>=1	2:00s	0	S
 Rule	Chatham	1976	1989	-	Mar	Sun>=1	2:45s	0	S
 Rule	NZ	1989	only	-	Oct	Sun>=8	2:00s	1:00	D
 Rule	Chatham	1989	only	-	Oct	Sun>=8	2:45s	1:00	D
-Rule	NZ	1990	max	-	Oct	Sun>=1	2:00s	1:00	D
-Rule	Chatham	1990	max	-	Oct	Sun>=1	2:45s	1:00	D
-Rule	NZ	1990	max	-	Mar	Sun>=15	2:00s	0	S
-Rule	Chatham	1990	max	-	Mar	Sun>=15	2:45s	0	S
+Rule	NZ	1990	2006	-	Oct	Sun>=1	2:00s	1:00	D
+Rule	Chatham	1990	2006	-	Oct	Sun>=1	2:45s	1:00	D
+Rule	NZ	1990	2007	-	Mar	Sun>=15	2:00s	0	S
+Rule	Chatham	1990	2007	-	Mar	Sun>=15	2:45s	0	S
+Rule	NZ	2007	max	-	Sep	lastSun	2:00s	1:00	D
+Rule	Chatham	2007	max	-	Sep	lastSun	2:45s	1:00	D
+Rule	NZ	2008	max	-	Apr	Sun>=1	2:00s	0	S
+Rule	Chatham	2008	max	-	Apr	Sun>=1	2:45s	0	S
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Pacific/Auckland	11:39:04 -	LMT	1868 Nov  2
 			11:30	NZ	NZ%sT	1946 Jan  1
@@ -1146,6 +1150,12 @@ Zone	Pacific/Wallis	12:15:20 -	LMT	1901
 # transitions at 2:45 local standard time; this confirms that Chatham
 # is always exactly 45 minutes ahead of Auckland.
 
+# From Colin Sharples (2007-04-30):
+# DST will now start on the last Sunday in September, and end on the
+# first Sunday in April.  The changes take effect this year, meaning
+# that DST will begin on 2007-09-30 2008-04-06.
+# http://www.dia.govt.nz/diawebsite.nsf/wpg_URL/Services-Daylight-Saving-Daylight-saving-to-be-extended
+
 ###############################################################################
 
 
===================================================================
RCS file: RCS/northamerica,v
retrieving revision 2007.5
retrieving revision 2007.5.0.1
diff -pu -r2007.5 -r2007.5.0.1
--- northamerica	2007/04/02 14:11:26	2007.5
+++ northamerica	2007/05/01 23:50:26	2007.5.0.1
@@ -2325,6 +2325,9 @@ Zone America/Guatemala	-6:02:04 -	LMT	19
 #
 # 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
@@ -2334,8 +2337,8 @@ Rule	Haiti	1983	1987	-	Oct	lastSun	0:00	
 # 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	max	-	Apr	Sun>=1	0:00	1:00	D
-Rule	Haiti	2005	max	-	Oct	lastSun	0:00	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
@@ -2518,13 +2521,31 @@ Zone America/St_Vincent	-4:04:56 -	LMT	1
 			-4:00	-	AST
 
 # Turks and Caicos
-# From Paul Eggert (2006-03-22):
+#
+# 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 IATA SSIM.
+# 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
===================================================================
RCS file: RCS/tz-art.htm,v
retrieving revision 2006.11
retrieving revision 2006.11.0.1
diff -pu -r2006.11 -r2006.11.0.1
--- tz-art.htm	2006/08/21 13:56:09	2006.11
+++ tz-art.htm	2007/05/01 23:50:26	2006.11.0.1
@@ -178,6 +178,56 @@ Richard Teitelbaum, modular moog and mic
 <tr><td>Notes</td><td>Includes the song "Central Standard Time." Thanks to Colin Bowern for this information.</td></tr>
 <tr><td><a href="http://www.allmusic.com/cg/amg.dll?p=amg&amp;sql=10:7ddovwvla9xk">AMG Rating</a></td><td>2.5 stars</td></tr>
 <tr><td>&nbsp;</td></tr>
+
+<tr><td>Artist</td><td>Coldplay</td></tr>
+<tr><td>Song</td><td>Clocks</td></tr>
+<tr><td>Copyright Date</td><td>2003</td></tr>
+<tr><td>Label</td><td>Capitol Records</td></tr>
+<tr><td>ID</td><td>52608</td></tr>
+<tr><td>Total Time</td><td>4:13</td></tr>
+<tr><td>Notes</td><td>Won the 2004 Record of the Year honor at the
+Grammy Awards. Co-written and performed by Chris Martin,
+great-great-grandson of DST inventor William Willett. The song's first
+line is "Lights go out and I can't be saved".</td></tr>
+<td>&nbsp;</td></tr>
+
+<tr><td>Artist</td><td>Irving Kahal and Harry Richman</td></tr>
+<tr><td>Song</td><td>There Ought to be a Moonlight Saving Time</td></tr>
+<tr><td>Copyright Date</td><td>1931</td>
+<tr><td>Notes</td><td>This musical standard was a #1 hit for Guy Lombardo
+in 1931, and was also performed by Maurice Chevalier, Blossom Dearie
+and many others. The phrase "Moonlight saving time" also appears in
+the 1995 country song "Not Enough Hours in the Night" written by Aaron
+Barker, Kim Williams and Rob Harbin and performed by Doug
+Supernaw.</td></tr>
+<tr><td>&nbsp;</td></tr>
+
+<tr><td>TV episode title</td><td>The Lost Hour</td>
+<tr><td>TV series</td><td><em>Eerie, Indiana</em></td>
+<tr><td>TV episode number</td><td>10</td>
+<tr><td>Network</td><td>NBC</td>
+<tr><td>Air date</td><td>1991-12-01</td>
+<tr><td>Notes</td><td>Despite Indiana's then-lack of DST, Marshall changes his clock with unusual consequences.</td></tr>
+<tr><td>&nbsp;</td></tr>
+
+<tr><td>TV episode title</td><td>Time Tunnel</td>
+<tr><td>TV series</td><td><em>The Adventures of Pete &amp; Pete</em></td>
+<tr><td>TV episode number</td><td>5, season 2</td>
+<tr><td>Network</td><td>Nickelodeon</td>
+<tr><td>Air date</td><td>1994-10-23</td>
+<tr><td>Notes</td><td>The two Petes travel back in time an hour on the day that DST ends.</td></tr>
+<tr><td>&nbsp;</td></tr>
+
+<tr><td>TV episode title</td><td>King-Size Homer</td>
+<tr><td>TV series</td><td><em>The Simpsons</em></td>
+<tr><td>TV episode number</td><td>135</td>
+<tr><td>Network</td><td>Fox</td>
+<tr><td>Air date</td><td>1995-11-05</td>
+<tr><td>Notes</td><td>Homer, working from home, remarks "8:58, first
+time I've ever been early for work. Except for all those daylight
+savings days. Lousy farmers."</td></tr>
+<tr><td>&nbsp;</td></tr>
+
 <tr><td>Artist</td><td>Jules Verne</td></tr>
 <tr><td>Book</td><td>Le Tour du Monde en Quatre-Vingts Jours
 (Around the World in Eighty Days)</td></tr>



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