proposed tz data changes for Egypt, Syria, Uruguay (revised)

Paul Eggert eggert at CS.UCLA.EDU
Wed Sep 20 19:47:25 UTC 2006


Here is the latest set of proposed changes for Egypt, Syria, and
Uruguay.  This supersedes the two messages I sent out earlier on this
subject in <http://article.gmane.org/gmane.comp.time.tz/1224> and
<http://article.gmane.org/gmane.comp.time.tz/1221>.  I'd like to thank
Steffen Thorsen, Oscar van Vlijmen, and Jesper Norgaard Welen for
reading and correcting the earlier messages.

This change affects time stamps within the next 48 hours in Egypt and
Syria, so people interested in up-to-date correctness in those regions
need to apply this patch soon.

===================================================================
RCS file: RCS/africa,v
retrieving revision 2006.12
retrieving revision 2006.12.0.1
diff -pu -r2006.12 -r2006.12.0.1
--- africa	2006/09/18 16:58:11	2006.12
+++ africa	2006/09/20 19:35:29	2006.12.0.1
@@ -212,35 +212,13 @@ Rule	Egypt	1990	1994	-	May	 1	1:00	1:00	
 # Go with IATA starting in 1995, except correct 1995 entry from 09-30 to 09-29.
 Rule	Egypt	1995	max	-	Apr	lastFri	 0:00s	1:00	S
 Rule	Egypt	1995	2005	-	Sep	lastThu	23:00s	0	-
-# From Hammad Hassan (2006-09-13), quoting The Egyptian Gazette (2006-09-10),
-# issue no. 41,083, page 1, column 1:
-# Egypt will switch back to the winter time on the eve of the first day of
-# the Muslim holy month of Ramadan, expected to start this year on Sept. 24....
-# "Clocks will be turned back starting from the night on which Darul Ifta ...
-# announces sighting the crescent of the month of Ramadan,..." Magdi Radi,
-# the Cabinet spokesman, said yesterday.
-# From Hammad Hassan (2006-09-17):
-# when we reach 1:00AM at Sep 25 the clocks will be turned back to 12:00AM.
-# I think also this change will be this year and may be the next couple of
-# years only.   (They just want to exclude Ramadan from the summer time; if
-# so, the change will be among 3 years only if my calculations are correct).
-# From Paul Eggert (2006-09-17):
-# For now, assume a similar rule will be followed in 2006/2008, and that
-# Ramadan will start as predicted by GNU Emacs 21.4.  Here's the code used
-# to generate the 2006/2008 lines:
-# (let ((year 1427))
-#   (while (< year (+ 1427 3))
-#     (let ((date (calendar-gregorian-from-absolute
-#		   (calendar-absolute-from-islamic (list 9 2 year)))))
-#	(insert (format "Rule\tEgypt\t%d\tonly\t-\t%s\t%2d\t 1:00\t0\t-\n"
-#			(extract-calendar-year date)
-#			(calendar-month-name (extract-calendar-month date) 3)
-#			(extract-calendar-day date))))
-#     (setq year (1+ year)))))
-Rule	Egypt	2006	only	-	Sep	25	 1:00	0	-
-Rule	Egypt	2007	only	-	Sep	14	 1:00	0	-
-Rule	Egypt	2008	only	-	Sep	 3	 1:00	0	-
-Rule	Egypt	2009	max	-	Sep	lastThu	23:00s	0	-
+# From Steffen Thorsen (2006-09-19):
+# The Egyptian Gazette, issue 41,090 (2006-09-18), page 1, reports:
+# Egypt will turn back clocks by one hour at the midnight of Thursday
+# after observing the daylight saving time since May.
+# http://news.gom.com.eg/gazette/pdf/2006/09/18/01.pdf
+Rule	Egypt	2006	only	-	Sep	21	23:00s	0	-
+Rule	Egypt	2007	max	-	Sep	lastThu	23:00s	0	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Africa/Cairo	2:05:00 -	LMT	1900 Oct
===================================================================
RCS file: RCS/asia,v
retrieving revision 2006.11
retrieving revision 2006.11.0.2
diff -pu -r2006.11 -r2006.11.0.2
--- asia	2006/08/28 16:18:48	2006.11
+++ asia	2006/09/20 19:35:02	2006.11.0.2
@@ -1670,9 +1670,14 @@ Rule	Syria	1993	only	-	Sep	25	0:00	0	-
 # 2000-04-02, and 2001-04-02; (1999-09) says 2000-03-31 and 2001-03-31;
 # ignore all these claims and go with Shanks & Pottenger.
 Rule	Syria	1994	1996	-	Apr	 1	0:00	1:00	S
-Rule	Syria	1994	max	-	Oct	 1	0:00	0	-
+Rule	Syria	1994	2005	-	Oct	 1	0:00	0	-
 Rule	Syria	1997	1998	-	Mar	lastMon	0:00	1:00	S
 Rule	Syria	1999	max	-	Apr	 1	0:00	1:00	S
+# From Stephen Colebourne (2006-09-18):
+# According to IATA data, Syria will change DST on 21st September [21:00 UTC]
+# this year [only]....  This is probably related to Ramadan, like Egypt.
+Rule	Syria	2006	only	-	Sep	22	0:00	0	-
+Rule	Syria	2007	max	-	Oct	 1	0:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Damascus	2:25:12 -	LMT	1920	# Dimashq
 			2:00	Syria	EE%sT
===================================================================
RCS file: RCS/southamerica,v
retrieving revision 2006.3
retrieving revision 2006.3.0.2
diff -pu -r2006.3 -r2006.3.0.2
--- southamerica	2006/04/03 14:07:15	2006.3
+++ southamerica	2006/09/20 19:35:02	2006.3.0.2
@@ -1064,6 +1064,10 @@ Rule	Uruguay	2005	only	-	Mar	27	 2:00	0	
 # 02:00 local time, official time in Uruguay will be at GMT -2.
 Rule	Uruguay	2005	only	-	Oct	 9	 2:00	1:00	S
 Rule	Uruguay	2006	only	-	Mar	12	 2:00	0	-
+# From Jesper Norgaard Welen (2006-09-06):
+# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
+Rule	Uruguay	2006	max	-	Oct	Sun>=1	 2:00	1:00	S
+Rule	Uruguay	2007	max	-	Mar	Sun>=8	 2:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone America/Montevideo	-3:44:44 -	LMT	1898 Jun 28
 			-3:44:44 -	MMT	1920 May  1	# Montevideo MT



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