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Revision History of TZ database
by Hardik Patel March 25, 2009

March 25, 2009

Hi All, Where can I find revision history of changes that has happened in TZ database across given two versions? For example, I would like to know what all changes happened from TZ version 2007g to 2008c. I will appreciate any pointers/help regarding this. P.S. I have not subscribed to the timezone mailing list so kindly do ‘Reply All’ while responding this email thread else I will not be able to receive it. Thanks, Hardik

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tzcode2009d.tar.gz and tzdata2009d.tar.gz
by Olson, Arthur David (NIH/NCI) [E] March 23, 2009

March 23, 2009

The files... ftp://elsie.nci.nih.gov/pub/tzcode2009d.tar.gz ...and... ftp://elsie.nci.nih.gov/pub/tzdata2009d.tar.gz ...are now available; these reflect the Morocco, Tunisia, Argentina, and American Astronomical Society changes circulated last week on the time zone mailing list. There may well be an update for Pakistan shortly; folks who want to avoid thrashing may want to wait for tzdata2009e.tar.gz. --ado

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proposed change to "asia" time zone file (for Syria)
by Arthur David Olson March 19, 2009

March 19, 2009

Below find a proposed change to the "asia" file in the time zone package to reflect Syria's move of the start of DST in 2009. If no problems are found, this should appear in the ftp version this coming Monday. --ado ------- asia ------- *** /tmp/geta18918 Thu Mar 19 16:38:56 2009 --- /tmp/getb18918 Thu Mar 19 16:38:56 2009 *************** *** 1,4 **** ! # @(#)asia 8.25 # <pre> # This data is by no means authoritative; if you think you know better, --- 1,4 ---- ! # @(#)asia 8.26 # <pre> # This data is by no means authoritative; if you think you know better, *************** *** 1969,1976 **** # http://sana.sy/ara/2/2008/10/07/195459.htm # </a> ! Rule Syria 2008 max - Apr Fri>=1 0:00 1:00 S Rule Syria 2008 max - Nov 1 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Damascus 2:25:12 - LMT 1920 # Dimashq --- 1969,1997 ---- # http://sana.sy/ara/2/2008/10/07/195459.htm # </a> ! # From Steffen Thorsen (2009-03-19): ! # Syria will start DST on 2009-03-27 00:00 this year according to many sources, ! # two examples: ! # ! # <a href="http://www.sana.sy/eng/21/2009/03/17/217563.htm"> ! # http://www.sana.sy/eng/21/2009/03/17/217563.htm ! # </a> ! # (English, Syrian Arab News # Agency) ! # <a href="http://thawra.alwehda.gov.sy/_View_news2.asp?FileName=944592587200903180122…"> ! # http://thawra.alwehda.gov.sy/_View_news2.asp?FileName=944592587200903180122… ! # </a> ! # (Arabic, gov-site) ! # ! # We have not found any sources saying anything about when DST ends this year. ! # ! # Our summary ! # <a href="http://www.timeanddate.com/news/time/syria-dst-starts-march-27-2009.html"> ! # http://www.timeanddate.com/news/time/syria-dst-starts-march-27-2009.html ! # </a> ! ! Rule Syria 2008 only - Apr Fri>=1 0:00 1:00 S Rule Syria 2008 max - Nov 1 0:00 0 - + Rule Syria 2009 max - Mar lastFri 0:00 1:00 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Damascus 2:25:12 - LMT 1920 # Dimashq

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proposed change to tz-link.htm
by Arthur David Olson March 19, 2009

March 19, 2009

The change below eliminates a dead link resulting from the American Astronomical Society having disbanded its leap second committee. Expect this change in the ftp version of the files this coming Monday. --ado ------- tz-link.htm ------- *** /tmp/geta18562 Thu Mar 19 15:44:13 2009 --- /tmp/getb18562 Thu Mar 19 15:44:13 2009 *************** *** 18,24 **** <body> <h1>Sources for Time Zone and Daylight Saving Time Data</h1> <address> ! @(#)tz-link.htm 8.16 </address> <p> Please send corrections to this web page to the --- 18,24 ---- <body> <h1>Sources for Time Zone and Daylight Saving Time Data</h1> <address> ! @(#)tz-link.htm 8.17 </address> <p> Please send corrections to this web page to the *************** *** 555,561 **** discussed further in <a href="http://www.cl.cam.ac.uk/~mgk25/time/metrologia-leapsecond.pdf">The leap second: its history and possible future</a>. ! The <a href="http://aas.org/policy/LeapSecondCommittee.html"><abbr title="American Astronomical Society">AAS</abbr> Leap Second Committee</a> has solicited input on this proposal. <a href="http://www.ucolick.org/~sla/leapsecs/">The --- 555,561 ---- discussed further in <a href="http://www.cl.cam.ac.uk/~mgk25/time/metrologia-leapsecond.pdf">The leap second: its history and possible future</a>. ! The (now disbanded) <a href="http://members.aas.org/comms/leap.cfm"><abbr title="American Astronomical Society">AAS</abbr> Leap Second Committee</a> has solicited input on this proposal. <a href="http://www.ucolick.org/~sla/leapsecs/">The

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Syria starts DST one week earlier
by Steffen Thorsen March 19, 2009

March 19, 2009

Syria will start DST on 2009-03-27 00:00 this year according to many sources, two examples: http://www.sana.sy/eng/21/2009/03/17/217563.htm (English, Syrian Arab News Agency) http://thawra.alwehda.gov.sy/_View_news2.asp?FileName=944592587200903180122… (Arabic, gov-site) We have not found any sources saying anything about when DST ends this year. Our summary http://www.timeanddate.com/news/time/syria-dst-starts-march-27-2009.html Best regards, Steffen Thorsen / timeanddate.com

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proposed changes to "africa" for Morocco and Tunisia
by Arthur David Olson March 18, 2009

March 18, 2009

Here are proposed changes to the "africa" file in the time zone package; these reflect changes in Morocco and Tunisia. If no problems are found, expect these to show up in the ftp version on the 23rd. --ado ------- africa ------- *** /tmp/geta8634 Wed Mar 18 08:54:34 2009 --- /tmp/getb8634 Wed Mar 18 08:54:34 2009 *************** *** 1,4 **** ! # @(#)africa 8.17 # <pre> # This data is by no means authoritative; if you think you know better, --- 1,4 ---- ! # @(#)africa 8.18 # <pre> # This data is by no means authoritative; if you think you know better, *************** *** 564,569 **** --- 564,603 ---- # <a href="http://www.timeanddate.com/news/time/morocco-ends-dst-early-2008.html"> # http://www.timeanddate.com/news/time/morocco-ends-dst-early-2008.html # </a> + + # From Steffen Thorsen (2009-03-17): + # Morocco will observe DST from 2009-06-01 00:00 to 2009-08-21 00:00 according + # to many sources, such as + # <a href="http://news.marweb.com/morocco/entertainment/morocco-daylight-saving.html"> + # http://news.marweb.com/morocco/entertainment/morocco-daylight-saving.html + # </a> + # <a href="http://www.medi1sat.ma/fr/depeche.aspx?idp=2312"> + # http://www.medi1sat.ma/fr/depeche.aspx?idp=2312 + # </a> + # (French) + # + # Our summary: + # <a href="http://www.timeanddate.com/news/time/morocco-starts-dst-2009.html"> + # http://www.timeanddate.com/news/time/morocco-starts-dst-2009.html + # </a> + + # From Alexander Krivenyshev (2009-03-17): + # Here is a link to official document from Royaume du Maroc Premier Ministre, + # Ministere de la Modernisation des Secteurs Publics + # + # Under Article 1 of Royal Decree No. 455-67 of Act 23 safar 1387 (2 june 1967) + # concerning the amendment of the legal time, the Ministry of Modernization of + # Public Sectors announced that the official time in the Kingdom will be + # advanced 60 minutes from Sunday 31 May 2009 at midnight. + # + # <a href="http://www.mmsp.gov.ma/francais/Actualites_fr/PDF_Actualites_Fr/HeureEte_FR…"> + # http://www.mmsp.gov.ma/francais/Actualites_fr/PDF_Actualites_Fr/HeureEte_FR… + # </a> + # + # <a href="http://www.worldtimezone.com/dst_news/dst_news_morocco03.html"> + # http://www.worldtimezone.com/dst_news/dst_news_morocco03.html + # </a> + # RULE NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Morocco 1939 only - Sep 12 0:00 1:00 S *************** *** 583,588 **** --- 617,624 ---- Rule Morocco 1978 only - Aug 4 0:00 0 - Rule Morocco 2008 only - Jun 1 0:00 1:00 S Rule Morocco 2008 only - Sep 1 0:00 0 - + Rule Morocco 2009 only - Jun 1 0:00 1:00 S + Rule Morocco 2009 only - Aug 21 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Africa/Casablanca -0:30:20 - LMT 1913 Oct 26 0:00 Morocco WE%sT 1984 Mar 16 *************** *** 787,792 **** --- 823,865 ---- # Ending : the last Sunday of October at 03:00 ... # http://www.tap.info.tn/en/index.php?option=com_content&task=view&id=1188&It… + # From Steffen Thorsen (2009-03-16): + # According to several news sources, Tunisia will not observe DST this year. + # (Arabic) + # <a href="http://www.elbashayer.com/?page=viewn&nid=42546"> + # http://www.elbashayer.com/?page=viewn&nid=42546 + # </a> + # <a href="http://www.babnet.net/kiwidetail-15295.asp"> + # http://www.babnet.net/kiwidetail-15295.asp + # </a> + # + # We have also confirmed this with the US embassy in Tunisia. + # We have a wrap-up about this on the following page: + # <a href="http://www.timeanddate.com/news/time/tunisia-cancels-dst-2009.html"> + # http://www.timeanddate.com/news/time/tunisia-cancels-dst-2009.html + # </a> + + # From Alexander Krivenyshev (2009-03-17): + # Here is a link to Tunis Afrique Presse News Agency + # + # Standard time to be kept the whole year long (tap.info.tn): + # + # (in English) + # <a href="http://www.tap.info.tn/en/index.php?option=com_content&task=view&id=26813&I…"> + # http://www.tap.info.tn/en/index.php?option=com_content&task=view&id=26813&I… + # </a> + # + # (in Arabic) + # <a href="http://www.tap.info.tn/ar/index.php?option=com_content&task=view&id=61240&I…"> + # http://www.tap.info.tn/ar/index.php?option=com_content&task=view&id=61240&I… + # </a> + + # From Arthur David Olson (2009--3-18): + # The Tunis Afrique Presse News Agency notice contains this: "This measure is due to the fact + # that the fasting month of ramadan coincides with the period concerned by summer time. + # Therefore, the standard time will be kept unchanged the whole year long." + # So foregoing DST seems to be an exception (albeit one that may be repeated in the future). + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Tunisia 1939 only - Apr 15 23:00s 1:00 S Rule Tunisia 1939 only - Nov 18 23:00s 0 - *************** *** 811,818 **** Rule Tunisia 1990 only - May 1 0:00s 1:00 S Rule Tunisia 2005 only - May 1 0:00s 1:00 S Rule Tunisia 2005 only - Sep 30 1:00s 0 - ! Rule Tunisia 2006 max - Mar lastSun 2:00s 1:00 S ! Rule Tunisia 2006 max - Oct lastSun 2:00s 0 - # Shanks & Pottenger give 0:09:20 for Paris Mean Time; go with Howse's # more precise 0:09:21. # Shanks & Pottenger say the 1911 switch was on Mar 9; go with Howse's Mar 11. --- 884,893 ---- Rule Tunisia 1990 only - May 1 0:00s 1:00 S Rule Tunisia 2005 only - May 1 0:00s 1:00 S Rule Tunisia 2005 only - Sep 30 1:00s 0 - ! Rule Tunisia 2006 2008 - Mar lastSun 2:00s 1:00 S ! Rule Tunisia 2006 2008 - Oct lastSun 2:00s 0 - ! Rule Tunisia 2010 max - Mar lastSun 2:00s 1:00 S ! Rule Tunisia 2010 max - Oct lastSun 2:00s 0 - # Shanks & Pottenger give 0:09:20 for Paris Mean Time; go with Howse's # more precise 0:09:21. # Shanks & Pottenger say the 1911 switch was on Mar 9; go with Howse's Mar 11.

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Tunisia cancels DST
by Steffen Thorsen March 17, 2009

March 17, 2009

According to several news sources, Tunisia will not observe DST this year. (Arabic) http://www.elbashayer.com/?page=viewn&nid=42546 http://www.babnet.net/kiwidetail-15295.asp We have also confirmed this with the US embassy in Tunisia. We have a wrap-up about this on the following page: http://www.timeanddate.com/news/time/tunisia-cancels-dst-2009.html Regards, Steffen Thorsen / timeanddate.com

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Morocco to observe DST in 2009
by Steffen Thorsen March 17, 2009

March 17, 2009

Morocco will observe DST from 2009-06-01 00:00 to 2009-08-21 00:00 according to many sources, such as http://news.marweb.com/morocco/entertainment/morocco-daylight-saving.html http://www.medi1sat.ma/fr/depeche.aspx?idp=2312 (French) Our summary: http://www.timeanddate.com/news/time/morocco-starts-dst-2009.html Best regards, Steffen / timeanddate.com

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FW: Time Zone change for San Luis, Argentina
by Olson, Arthur David (NIH/NCI) [E] March 16, 2009

March 16, 2009

I'm forwarding this message from NorbertoNazabal, who is not on the time zone mailing list. Those of you who are on the list, please direct replies appropriately. --ado From: Norberto Nazabal [mailto:nazabal@gmail.com] Sent: Monday, March 16, 2009 3:19 To: Jesper Nørgaard Cc: TZ-list Subject: Re: Time Zone change for San Luis, Argentina Hi Jesper, Thanks for you answer, I want to let you know that currently we are using the GMT-4 time zone here at San Luis, since the last Sunday 15th at 00:00. I checked the Chile DST and I think we will use the same time zone, but I will try to contact to somebody in the goverment to confirm that information. Thanks for your notes about the consistency issues and I hope the new time zone for San Luis can be added to your database after the confirmation of which time zone we will use. Regards, Norberto Nazabal. 2009/3/16 Jesper Nørgaard <jnorgard(a)prodigy.net.mx> Norberto Nazabal wrote: >Basically the law says: >1) We will use the time zone GMT-3 from the 0 hour of the second Sunday of October to the 24 hours of the second Saturday of April. >2) We will use the time zone GMT-4 from the 0 hour of the second Sunday of April to the 24 hours of the second Saturday of October. I agree that this is an accurate translation of the document which was published already back in December 2008. However this definition contains serious problems of consistency. And not only that, if this was published so long back (2-3 months) why was it not followed in 2009, but rather following the Chile DST and Buenos Aires Argentinian DST instead with a frantic press conference the Thursday before the weekend when it was implemented? The problem of consistency is the perhaps not obvious fact that the Second Saturday of a month at 24:00 is *not* always the same time as the Second Sunday at 0:00 of a month. Thus the above definition is not always defining two contiguous periods (DST and non-DST) as one might think. I am sure this is an attempt to give an intuitive definition where one period goes to the 24:00 hours of one day, and is replaced with a new period starting at 0:00 hour the next day, but it fails. The first problem will occur in 2012 where the Second Saturday is 14.th. of April while the Second Sunday is the 8.th. of April (e.g. the problem occurs when the first in the month is a Sunday). So literally the definition will have it that GMT-3 will be followed from 2011-10-09 00:00:00 to 2012-04-14 24:00:00 and GMT-4 will be followed from 2012-04-08 00:00:00 : During a week we have both GMT-3 and GMT-4 ?? The most probable scenarios are that either San Luis redefines the decree in a consistent way, or that either Chile DST or Argentina DST is followed. The future will tell. Already in October 2009 the two latter are different, Chile starts DST 2009-10-11 00:00:00 and Buenos Aires starts DST 2009-10-18 00:00:00. Regards, Jesper Nørgaard Welen No virus found in this outgoing message. Checked by AVG. Version: 7.5.557 / Virus Database: 270.11.15/2003 - Release Date: 2009-03-15 14:07

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RE: Time Zone change for San Luis, Argentina
by Jesper Nørgaard March 16, 2009

March 16, 2009

Norberto Nazabal wrote: >Basically the law says: >1) We will use the time zone GMT-3 from the 0 hour of the second Sunday of October to the 24 hours of the second Saturday of April. >2) We will use the time zone GMT-4 from the 0 hour of the second Sunday of April to the 24 hours of the second Saturday of October. I agree that this is an accurate translation of the document which was published already back in December 2008. However this definition contains serious problems of consistency. And not only that, if this was published so long back (2-3 months) why was it not followed in 2009, but rather following the Chile DST and Buenos Aires Argentinian DST instead with a frantic press conference the Thursday before the weekend when it was implemented? The problem of consistency is the perhaps not obvious fact that the Second Saturday of a month at 24:00 is *not* always the same time as the Second Sunday at 0:00 of a month. Thus the above definition is not always defining two contiguous periods (DST and non-DST) as one might think. I am sure this is an attempt to give an intuitive definition where one period goes to the 24:00 hours of one day, and is replaced with a new period starting at 0:00 hour the next day, but it fails. The first problem will occur in 2012 where the Second Saturday is 14.th. of April while the Second Sunday is the 8.th. of April (e.g. the problem occurs when the first in the month is a Sunday). So literally the definition will have it that GMT-3 will be followed from 2011-10-09 00:00:00 to 2012-04-14 24:00:00 and GMT-4 will be followed from 2012-04-08 00:00:00 : During a week we have both GMT-3 and GMT-4 ?? The most probable scenarios are that either San Luis redefines the decree in a consistent way, or that either Chile DST or Argentina DST is followed. The future will tell. Already in October 2009 the two latter are different, Chile starts DST 2009-10-11 00:00:00 and Buenos Aires starts DST 2009-10-18 00:00:00. Regards, Jesper Nørgaard Welen No virus found in this outgoing message. Checked by AVG. Version: 7.5.557 / Virus Database: 270.11.15/2003 - Release Date: 2009-03-15 14:07

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