August 2008 - tz - lists.iana.org

More details about Turkeys DST proposal
by Sue Williams Aug. 20, 2008

Aug. 20, 2008

This article says that around the end of March 2011, Turkey wants to adjust the clocks forward by 1/2 hour and stay that way permanently. The article indicates that this is a change in timezone offset in addition to stopping observance of DST. This proposal has not yet been approved. Read more here... Turkey to abandon daylight saving time in 2011 http://www.turkishdailynews.com.tr/article.php?enewsid=112989 ... Sue Williams

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Re: zdump
by Dan Cotruta Aug. 12, 2008

Aug. 12, 2008

Dear Olson, Many thanks for your quick reply. I did go through the archives a little more carefully after sending my question. As I'm not a C programmer - can you just confirm my understanding of the problem? time_t is part of a standard C library; on 64 bit systems it is defined as being 64 bits long, giving a very large range for the years that can be displayed. int is the standard builtin integer type, which for reasons that evade me is still defined as 32 bits long. the tzcode does some fancy calculations to work out historical/future times of some kind - and obviously trying to fit a 64 bit value into a 32 bit space doesn't work. I hope that's right so far... So then: Why does Madagascar fail? [dcotruta@linnoc ~]$ /usr/sbin/zdump -v -c 2008 Mauritius Mauritius -9223372036854775808 = NULL Mauritius -9223372036854689408 = NULL Mauritius 9223372036854689407 = NULL Mauritius 9223372036854775807 = NULL Here, the limit should be 2008 - therefore the 32 bit limit should not be a problem. Am I missing something? I don't know anything about C programming - is this something that's likely to be fixed at some point soon? I've started work on a Python version of zdump to get around this limitation - is this something that might be useful to the community? If so, I'd appreciate some help decrypting the logic of the tzdata files. Thanks again for your swift reply, Dan On Mon, Aug 11, 2008 at 2:07 PM, Olson, Arthur David (NIH/NCI) [E] < olsona(a)dc37a.nci.nih.gov> wrote: > The numerical values are "number of seconds since midnight, January 1, > 1970; they can be the immense values below on systems where time_t values > are 64-bit entities. > On such systems, extremely large and extremely small time stamps are > associated with years that can't be represented in 32-bit integers, so we > can't correctly convert them to "struct tm"s that represent them--that's why > the NULLs pop out for these very small and very large values. > > From: Dan Cotruta [mailto:dancotruta@linnoc.net] > Sent: Monday, August 11, 2008 8:30 > To: tz(a)lecserver.nci.nih.gov > Subject: zdump > > Someone, please enlighten me - what do the numerical numbers in the output > of zdump stand for? > > What I mean is, for this output: > > [dcotruta@linnoc ~]$ /usr/sbin/zdump -v -c 2008,2009 America/Los_Angeles > America/Los_Angeles -9223372036854775808 = NULL <------ What does this > line signify? > America/Los_Angeles -9223372036854689408 = NULL <------ What does this > line signify? > America/Los_Angeles Sun Mar 9 09:59:59 2008 UTC = Sun Mar 9 01:59:59 > 2008 PST isdst=0 gmtoff=-28800 > America/Los_Angeles Sun Mar 9 10:00:00 2008 UTC = Sun Mar 9 03:00:00 > 2008 PDT isdst=1 gmtoff=-25200 > America/Los_Angeles Sun Nov 2 08:59:59 2008 UTC = Sun Nov 2 01:59:59 > 2008 PDT isdst=1 gmtoff=-25200 > America/Los_Angeles Sun Nov 2 09:00:00 2008 UTC = Sun Nov 2 01:00:00 > 2008 PST isdst=0 gmtoff=-28800 > America/Los_Angeles 9223372036854689407 = NULL <------ What does this line > signify? > America/Los_Angeles 9223372036854775807 = NULL <------ What does this line > signify? > > The number is far too large to be a standard timestamp, even in > milliseconds... so what is it? > > Many thanks, > -- > Dan Cotruta > Operations Manager, London Innovation Centre. > > Tel: 0203 006 7278 > Mob: 0779 163 4020 > > London Innovation Centre, Lombard House, 2 Purley Way, Croydon CR0 3JP > (T) 0845 262 8545 (F) 020 8481 0460 (e) info(a)linnoc.net (w) www.linnoc.net > London Innovation Centre is a trading name of Kingston Innovation Centre > (Properties) Limited. > Registered in England under no. 4557707. > -- Dan Cotruta Operations Manager, London Innovation Centre. Tel: 0203 006 7278 Mob: 0779 163 4020 London Innovation Centre, Lombard House, 2 Purley Way, Croydon CR0 3JP (T) 0845 262 8545 (F) 020 8481 0460 (e) info(a)linnoc.net (w) www.linnoc.net London Innovation Centre is a trading name of Kingston Innovation Centre (Properties) Limited. Registered in England under no. 4557707.

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Turkey to implement 12-month daylight savings in 2 yrs
by Sue Williams Aug. 11, 2008

Aug. 11, 2008

I spotted this news article about a potential change in Turkey. http://www.hurriyet.com.tr/english/domestic/9626174.asp?scr=1 ... Sue Williams

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zdump
by Dan Cotruta Aug. 11, 2008

Aug. 11, 2008

Someone, please enlighten me - what do the numerical numbers in the output of zdump stand for? What I mean is, for this output: [dcotruta@linnoc ~]$ /usr/sbin/zdump -v -c 2008,2009 America/Los_Angeles America/Los_Angeles -9223372036854775808 = NULL <------ What does this line signify? America/Los_Angeles -9223372036854689408 = NULL <------ What does this line signify? America/Los_Angeles Sun Mar 9 09:59:59 2008 UTC = Sun Mar 9 01:59:59 2008 PST isdst=0 gmtoff=-28800 America/Los_Angeles Sun Mar 9 10:00:00 2008 UTC = Sun Mar 9 03:00:00 2008 PDT isdst=1 gmtoff=-25200 America/Los_Angeles Sun Nov 2 08:59:59 2008 UTC = Sun Nov 2 01:59:59 2008 PDT isdst=1 gmtoff=-25200 America/Los_Angeles Sun Nov 2 09:00:00 2008 UTC = Sun Nov 2 01:00:00 2008 PST isdst=0 gmtoff=-28800 America/Los_Angeles 9223372036854689407 = NULL <------ What does this line signify? America/Los_Angeles 9223372036854775807 = NULL <------ What does this line signify? The number is far too large to be a standard timestamp, even in milliseconds... so what is it? Many thanks, -- Dan Cotruta Operations Manager, London Innovation Centre. Tel: 0203 006 7278 Mob: 0779 163 4020 London Innovation Centre, Lombard House, 2 Purley Way, Croydon CR0 3JP (T) 0845 262 8545 (F) 020 8481 0460 (e) info(a)linnoc.net (w) www.linnoc.net London Innovation Centre is a trading name of Kingston Innovation Centre (Properties) Limited. Registered in England under no. 4557707.

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Difference between "s" and "u"
by Christian Sakowski Aug. 5, 2008

Aug. 5, 2008

Hi, What is the difference between 1:00u and 1:00s? Can anyone explain than? Is any documentation available? # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule EU 1977 1980 - Apr Sun>=1 1:00u 1:00 S # W-Eur differs from EU only in that W-Eur uses standard time. Rule W-Eur 1977 1980 - Apr Sun>=1 1:00s 1:00 S -- Grüße/Regards, Christian Sakowski christian(a)christiansakowski.de http://www.familiesakowski.de/ iChat/AIM: SakowskiF

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FW: MAURITIUS - Summertime update with link to official government cabinet decision
by Olson, Arthur David (NIH/NCI) [E] Aug. 4, 2008

Aug. 4, 2008

I'm forwarding this message from Riad M. Hossen, who is not on the time zone mailing list. Those of you who are on the list, please direct replies appropriately. --ado From: Riad M. Hossen Ally [mailto:riad@intnet.mu] Sent: Sunday, August 03, 2008 7:41 To: tz(a)lecserver.nci.nih.gov Subject: MAURITIUS - Summertime update with link to official government cabinet decision Sir/Madam, Thank you for the various updates you provide to the online community. We have downloaded tz*2008e.tar_2.gz and found in the data 'africa' 8.15 file that: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Mauritius 1982 only - Oct 10 0:00 1:00 S Rule Mauritius 1983 only - Mar 21 0:00 0 - Rule Mauritius 2008 only - Oct 26 2:00s 1:00 S Rule Mauritius 2009 only - Mar 27 2:00s 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis 4:00 Mauritius MU%sT # Mauritius Time # Agalega Is, Rodriguez # no information; probably like Indian/Mauritius With the online information described below, we would like to bring to your attention that: The Government of Mauritius weblink http://www.gov.mu/portal/site/pmosite/menuitem.4ca0efdee47462e7440a600248a5… Cabinet Decision of July 18th, 2008 states as follows: 4. ...Cabinet has agreed to the introduction into the National Assembly of the Time Bill which provides for the introduction of summer time in Mauritius. The summer time period which will be of one hour ahead of the standard time, will be aligned with that in Europe and the United States of America. It will start at two o'clock in the morning on the last Sunday of October and will end at two o'clock in the morning on the last Sunday of March the following year. The summer time for the year 2008 - 2009 will, therefore, be effective as from 26 October 2008 and end on 29 March 2009. Changes to the 'africa' file is typed in blue below: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Mauritius 1982 only - Oct 10 0:00 1:00 S Rule Mauritius 1983 only - Mar 21 0:00 0 - Rule Mauritius 2008 only - Oct 26 2:00s 1:00 S Rule Mauritius 2009 only - Mar 29 2:00s 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis 4:00 Mauritius MU%sT # Mauritius Time # Agalega Is, St. Brandon Is, Rodrigues Is # same time zone as Indian/Mauritius We would be very grateful if you could kindly post a new version of the tz*2008e compressed tar balls on your ftp server. Thanking you in anticipation, and remain with, Best compliments and regards, Riad.

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MAURITIUS - Summertime update with link to official government cabinet decision
by Riad M. Hossen Ally Aug. 3, 2008

Aug. 3, 2008

Sir/Madam, Thank you for the various updates you provide to the online community. We have downloaded tz*2008e.tar_2.gz and found in the data 'africa' 8.15 file that: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Mauritius 1982 only - Oct 10 0:00 1:00 S Rule Mauritius 1983 only - Mar 21 0:00 0 - Rule Mauritius 2008 only - Oct 26 2:00s 1:00 S Rule Mauritius 2009 only - Mar 27 2:00s 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis 4:00 Mauritius MU%sT # Mauritius Time # Agalega Is, Rodriguez # no information; probably like Indian/Mauritius With the online information described below, we would like to bring to your attention that: The Government of Mauritius weblink http://www.gov.mu/portal/site/pmosite/menuitem.4ca0efdee47462e7440a600248a5… Cabinet Decision of July 18th, 2008 states as follows: 4. ...Cabinet has agreed to the introduction into the National Assembly of the Time Bill which provides for the introduction of summer time in Mauritius. The summer time period which will be of one hour ahead of the standard time, will be aligned with that in Europe and the United States of America. It will start at two o’clock in the morning on the last Sunday of October and will end at two o’clock in the morning on the last Sunday of March the following year. The summer time for the year 2008 - 2009 will, therefore, be effective as from 26 October 2008 and end on 29 March 2009. Changes to the 'africa' file is typed in blue below: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Mauritius 1982 only - Oct 10 0:00 1:00 S Rule Mauritius 1983 only - Mar 21 0:00 0 - Rule Mauritius 2008 only - Oct 26 2:00s 1:00 S Rule Mauritius 2009 only - Mar 29 2:00s 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis 4:00 Mauritius MU%sT # Mauritius Time # Agalega Is, St. Brandon Is, Rodrigues Is # same time zone as Indian/Mauritius We would be very grateful if you could kindly post a new version of the tz*2008e compressed tar balls on your ftp server. Thanking you in anticipation, and remain with, Best compliments and regards, Riad.

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