Hong Kong problem and BCN timezone(s)
I have found a small problem in the Hong Kong corrections of 2009q. It seems that the Hong Kong government page says that DST was not used in 1977 and 1978, while this is the current tz data: Rule HK 1965 1977 - Apr Sun>=16 3:30 1:00 S Rule HK 1965 1977 - Oct Sun>=16 3:30 0 - Indeed the whole extract of the government web page is still part of the asia file. I would suggest it should be like this Rule HK 1965 1976 - Apr Sun>=16 3:30 1:00 S Rule HK 1965 1976 - Oct Sun>=16 3:30 0 - My other question concerns the timezone America/Santa_Isabel. It seems that several sources imply that all of Baca California Norte is on the same timezone http://www.frontera.info/EdicionEnlinea/Notas/Noticias/13032010/435414.aspx http://www.notisistema.com/noticias/?p=251578 http://www.timeanddate.com/news/time/north-mexico-dst-change.html This is far from authoritative, but at least and indication that BCN might be one single timezone. I wonder if there has been any confirmation of the Santa Isabel timezone in BCN? I am not saying it is not there, I just haven't found any confirmation of it. - Jesper Norgaard Welen
My other question concerns the timezone America/Santa_Isabel. It seems that several sources imply that all of Baca California Norte is on the same timezone http://www.frontera.info/EdicionEnlinea/Notas/Noticias/13032010/435414.aspx http://www.notisistema.com/noticias/?p=251578 http://www.timeanddate.com/news/time/north-mexico-dst-change.html This is far from authoritative, but at least and indication that BCN might be one single timezone. I wonder if there has been any confirmation of the Santa Isabel timezone in BCN? I am not saying it is not there, I just haven't found any confirmation of it.
The "frontera.info" page above references http://www.conuee.gob.mx/wb/CONAE/comunicado_dgafid_012010 which has the virtue of being a governmental ("gobierno") source. The "gob.mx" page indicates that US rules get followed "en los municipios fronterizos de Tijuana y Mexicali en Baja California" rather than in the entirety of Baja California. Of course the law is one thing and what's actually happening may be quite another. --ado
For Asia/Jerusalem (URL below) time zone -- DST begin date seems to be consistently on the 'First Friday' following March 26th every year. If March 26 falls on Friday then DST begins on that Friday. But I fail to see any pattern in DST end date. Currently, we have been defining new time zone rule every year for Asia/Jerusalem in our metadata but want to know if we can fit in some generic pattern to avoid maintenance. http://www.timeanddate.com/worldclock/timezone.html?n=110 Any suggestions ? Vilas --
The Wikipedia article on Israeli DST has a good discussion on why this is: http://en.wikipedia.org/wiki/Israel_Summer_Time To summarize, between 1992 and 2005, the start of DST was set by law, but the end of DST was ad hoc, at the whim of a government minister. Since 2005, the end of DST is determined by the Jewish lunar religious calendar, so I'm not sure if this can be accommodated by tz automatically. -Scott On Fri, Jan 7, 2011 at 3:36 PM, Vilas Khare (vkhare) <vkhare@cisco.com>wrote:
For Asia/Jerusalem (URL below) time zone -- DST begin date seems to be consistently on the 'First Friday' following March 26th every year. If March 26 falls on Friday then DST begins on that Friday. But I fail to see any pattern in DST end date. Currently, we have been defining new time zone rule every year for Asia/Jerusalem in our metadata but want to know if we can fit in some generic pattern to avoid maintenance.
http://www.timeanddate.com/worldclock/timezone.html?n=110
Any suggestions ?
Vilas --
-- Scott Atwood The hill isn't in the way, it is the way.
On Fri, 7 Jan 2011, Scott Atwood wrote:
Since 2005, the end of DST is determined by the Jewish lunar religious calendar, so I'm not sure if this can be accommodated by tz automatically.
More specifically, the current law mandates that DST ends at 02:00 a.m. on the Sunday before the fast of Yom Kippur (falls somewhere in September or October). There has been some discussion in the Knesset about amending this law since the switch back to DST occurs sometimes in early September (e.g. September 8, 2013). Thusfar, no proposed amendment has gone as far as to be tabled on the Knesset floor. ___________________________________________________________________________ Ephraim Silverberg, CSE System Group, Phone number: 972-2-6585521 Hebrew University, Jerusalem, Israel. Fax number: 972-2-5617723 WWW: http://www.cs.huji.ac.il/~ephraim E-mail: ephraim@cse.huji.ac.il
The Minister of Interior has appointed a committee to examine the possibility of extending the end date of Daylight Saving Time in Israel: http://www.jpost.com/NationalNews/Article.aspx?id=207228 I will update the list when the committee makes its recommendations (probably sometime in the spring). Meanwhile, the current daylight saving time rules remain in effect. ___________________________________________________________________________ Ephraim Silverberg, CSE System Group, Phone number: 972-2-6585521 Hebrew University, Jerusalem, Israel. Fax number: 972-2-5617723 WWW: http://www.cs.huji.ac.il/~ephraim E-mail: ephraim@cse.huji.ac.il
The Minister of Interior has appointed a committee to examine the possibility of extending the end date of Daylight Saving Time in Israel:
http://www.jpost.com/NationalNews/Article.aspx?id=207228
I will update the list when the committee makes its recommendations (probably sometime in the spring).
The committee has submitted its 200+ page report and recommendations to the Minister of Interior. The details of the recommendations are not yet public, but the minister is expected to make a statement regarding submitting an ammendment to the current law to extend the duration of Daylight Saving Time. [Article in Hebrew: http://www.mako.co.il/news-israel/local/Article-a7a4d2c009c3031004.htm&sCh=31750a2610f26110&pId=786102762 ] When more concrete details come to light, I will update the list. The legislative process will probably take a couple of months before becoming law. ___________________________________________________________________________ Ephraim Silverberg, CSE System Group, Phone number: 972-2-6585521 Hebrew University, Jerusalem, Israel. Fax number: 972-2-5617723 WWW: http://www.cs.huji.ac.il/~ephraim E-mail: ephraim@cse.huji.ac.il
The Minister of Interior has announced his intention to amend the law regarding Daylight Saving Time in Israel so that the annual extent of Daylight Saving Time would be 193 days: http://www.jpost.com/Headlines/Article.aspx?id=223809 Just how to calculate these 193 days, noone in the Interior Ministry (both the ministry's spokeswomen and the Knesset's interior committee office) could tell me. Based on reports from various news agencies, it would seem that the intent is to start DST on the first Friday after the vernal equinox (March 21) until the first Sunday after October 1. In 2011, this gives 191 days of DST. The office of the Spokeswoman for the Ministry of Interior said that since the change requires amending the law, when the actual proposal is put in front of the Knesset for first reading, they will be able to supply me with the exact dates proposed. In any case, it does not seem that this year will be affected as the end of DST was anyway scheduled for the night between Oct.1 and Oct. 2. This is good news since it will give vendors and computer installations until March 2012 to update their various O/S's. Once I get something official from the Ministry of Interior, I will pass it onto the list. ___________________________________________________________________________ Ephraim Silverberg, CSE System Group, Phone number: 972-2-6585521 Hebrew University, Jerusalem, Israel. Fax number: 972-2-5617723 WWW: http://www.cs.huji.ac.il/~ephraim E-mail: ephraim@cse.huji.ac.il
Just how to calculate these 193 days, noone in the Interior Ministry (both the ministry's spokeswomen and the Knesset's interior committee office) could tell me.
Based on reports from various news agencies, it would seem that the intent is to start DST on the first Friday after the vernal equinox (March 21) until the first Sunday after October 1. In 2011, this gives 191 days of DST.
The proposal is beginning to become clearer: DST will start on the Friday before the last Sunday of March and will end on the first Sunday after October 1. If this Sunday falls on a Jewish holiday, DST will be extended until the morning after the holiday. Thus in 2012, DST would start on March 23 and, since October 7 falls in the middle of the Jewish holiday of Sukkot, would end on October 9. I imagine that the proposal will be refined and revised before being tabled in the Knesset so I will report back when I get something in writing from the Ministry of Interior. ___________________________________________________________________________ Ephraim Silverberg, CSE System Group, Phone number: 972-2-6585521 Hebrew University, Jerusalem, Israel. Fax number: 972-2-5617723 WWW: http://www.cs.huji.ac.il/~ephraim E-mail: ephraim@cse.huji.ac.il
On Mon, 6 Jun 2011, I wrote:
The proposal is beginning to become clearer:
DST will start on the Friday before the last Sunday of March and will end on the first Sunday after October 1. If this Sunday falls on a Jewish holiday, DST will be extended until the morning after the holiday.
In today's cabinet meeting, the government has unanimously approved the amendment to the DST law. However, the change in the law must still be passed in the Knesset which can take a couple of months. I will update the list if more details become available or if there is any progress in the legislative process. ___________________________________________________________________________ Ephraim Silverberg, CSE System Group, Phone number: 972-2-6585521 Hebrew University, Jerusalem, Israel. Fax number: 972-2-5617723 WWW: http://www.cs.huji.ac.il/~ephraim E-mail: ephraim@cse.huji.ac.il
On Sun, 3 Jul 2011, I wrote:
I will update the list if more details become available
I have obtained the text of the proposed amendment from the Knesset's Interior Ministry Committee. The proposed DST law amendment translates as follows: (a) Every year, in the period from the Friday before the last Sunday in the month of March at 02:00, until the first Sunday after October 1 at 02:00, the time in Israel will be made an extra hour earlier so that it will precede Coordinated Universal Time by three hours. (b) In spite of the directive in subsection (a), should the first Sunday after October 1 fall during Rosh Hashana, the period defined in subsection (a) will be extended until the first Monday after October 1 at 02:00. The Hebrew text of the proposed amendment can be found at: ftp://ftp.cs.huji.ac.il/pub/tz/announcements/2012+draft.pdf The amendment has not been brought yet before the Knesset so it is not yet law. In any case, DST will end in 2011 on Sunday, October 2 at 02:00 a.m. both by the proposed rule and by the current rule so the first change in date would only be in March 2012. If and when the amendment is adopted into law, I will inform the list. Meanwhile, I have attached the context diffs to tzdata2011j/asia for the new rules should the law be adopted. _____________________________________ Ephraim Silverberg, CSE System Group, Hebrew University, Jerusalem, Israel. Phone/Fax number: +972-2-5494521
Hi ! According to Wikipedia [1] it's very unlikely to have a regular pattern in the near future. Even the hard coded table for DST end until 2015 seems to be a subject of the political debate. [1] http://en.wikipedia.org/wiki/Israel_Summer_Time#Post_2005 Regards, Ilya 01/08/2011 01:36 AM, ext Vilas Khare (vkhare) пишет:
For Asia/Jerusalem (URL below) time zone -- DST begin date seems to be consistently on the 'First Friday' following March 26th every year. If March 26 falls on Friday then DST begins on that Friday. But I fail to see any pattern in DST end date. Currently, we have been defining new time zone rule every year for Asia/Jerusalem in our metadata but want to know if we can fit in some generic pattern to avoid maintenance.
http://www.timeanddate.com/worldclock/timezone.html?n=110
Any suggestions ?
Vilas --
If you can generate Hebrew-calendar dates, that will do it. It's always either the 4th, 6th, 7th, or 9th of Tishri (whichever of those four falls on a Sunday). In the language of tzData, it's Sun>=3 (just on a month that the tz code doesn't handle). J Andrew Lipscomb, CPA*ABV, ASA Decosimo Advisory Services 900 Tallan Building 2 Union Square Chattanooga, TN 37402 423.756.7100 Fax 423.266.6671 www.decosimo.com/advisory -----Original Message----- From: Vilas Khare (vkhare) [mailto:vkhare@cisco.com] Sent: Friday 07 January 2011 18:36 To: tz@lecserver.nci.nih.gov Subject: Timezone for Asia/Jerusalem For Asia/Jerusalem (URL below) time zone -- DST begin date seems to be consistently on the 'First Friday' following March 26th every year. If March 26 falls on Friday then DST begins on that Friday. But I fail to see any pattern in DST end date. Currently, we have been defining new time zone rule every year for Asia/Jerusalem in our metadata but want to know if we can fit in some generic pattern to avoid maintenance. http://www.timeanddate.com/worldclock/timezone.html?n=110 Any suggestions ? Vilas --
participants (7)
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Andy Lipscomb
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Ephraim Silverberg
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Ilya Dogolazky
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Jesper Nørgaard
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Olson, Arthur David (NIH/NCI) [E]
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Scott Atwood
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Vilas Khare (vkhare)