proposed tz data changes for Syria, Uruguay

Here's the proposed changes to the tz data for today's heads-ups (is that the right word?). Thanks to Stephen Colebourne and Eduardo Cota for these changes. The Syria change takes effect Thursday, so I thought I'd send these out now. =================================================================== RCS file: RCS/asia,v retrieving revision 2006.11 retrieving revision 2006.11.0.1 diff -pu -r2006.11 -r2006.11.0.1 --- asia 2006/08/28 16:18:48 2006.11 +++ asia 2006/09/18 18:57:32 2006.11.0.1 @@ -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 this +# year [only].... This is probably related to Ramadan, like Egypt. +Rule Syria 2006 only - Sep 21 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 2006.3.0.1 diff -pu -r2006.3 -r2006.3.0.1 --- southamerica 2006/04/03 14:07:15 2006.3 +++ southamerica 2006/09/18 18:57:32 2006.3.0.1 @@ -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 Eduardo Cota (2006-09-15): +# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_... +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

From: Paul Eggert Date: Mon, 18 Sep 2006 12:06:41 -0700 Subject: proposed tz data changes for Syria, Uruguay
RCS file: RCS/asia,v retrieving revision 2006.11 retrieving revision 2006.11.0.1 diff -pu -r2006.11 -r2006.11.0.1 --- asia 2006/08/28 16:18:48 2006.11 +++ asia 2006/09/18 18:57:32 2006.11.0.1 @@ -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 this +# year [only].... This is probably related to Ramadan, like Egypt. +Rule Syria 2006 only - Sep 21 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
From Stephen Colebourne Subject: FW: Syrian TZ change
According to IATA data, Syria will change DST on 21st September this year:
Standard time +2 hours DST time +3 hours Change from standard to DST: 2006-03-30T22:00 2007-03-31T22:00 2008-03-31T22:00 Change from DST to standard: 2006-09-21T21:00 2007-09-30T21:00 2008-09-30T21:00
My question is: Are you shure that
Change from DST to standard: 2006-09-21T21:00 has to be interpreted as: +Rule Syria 2006 only - Sep 21 0:00 0 - Probably Sep 22 0:00h ? If you follow the IATA, then you may also want to have a look at the starting date in 2006: Mar 31 0:00, not Apr 1.

Oscar has a point. If we take the dates from IATA literally (and I suppose we should), then DST started one day earlier in Syria this year, March 31 at 0:00, not April 01 at 0:00.
-----Original Message----- From: Oscar van Vlijmen [mailto:ovv@hetnet.nl] Sent: Martes, 19 de Septiembre de 2006 8:56 +Rule Syria 2006 only - Sep 21 0:00 0 - Probably Sep 22 0:00h ? If you follow the IATA, then you may also want to have a look at the starting date in 2006: Mar 31 0:00, not Apr 1.
Regards - Jesper Nørgaard Welen

Jesper Norgaard Welen <jnorgard@prodigy.net.mx> writes:
Oscar has a point. If we take the dates from IATA literally (and I suppose we should), then DST started one day earlier in Syria this year, March 31 at 0:00, not April 01 at 0:00.
Thanks for mentioning that; I missed that connection. I suppose they could have started a day earlier this year after all, so that the transition was Friday morning rather than Saturday. On the other hand my own impression is that the IATA data are often off by a day or by an hour, presumably because the respondents get confused by all the UTC offset business. I suppose it's worth a comment at any rate, but that can wait until the next proposed change.
participants (3)
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Jesper Norgaard Welen
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Oscar van Vlijmen
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Paul Eggert