- tz - lists.iana.org

Cuba ends DST on November 13
by Steffen Thorsen Oct. 29, 2011

Oct. 29, 2011

Cuba will end DST two weeks later this year. Instead of going back tonight, it has been delayed to 2011-11-13 at 01:00. One source (Spanish) http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-… "A la 01:00 am de la madrugada del domingo 13 de noviembre, en Cuba se atrasará una hora las manecillas del reloj, con lo que quedará establecido en todo el territorio cubano el horario del meridiano de Greenwich." Our page: http://www.timeanddate.com/news/time/cuba-time-changes-2011.html Best regards, Steffen Thorsen - timeanddate.com

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Re: [tz] tzdata2011m.tar.gz
by Edwin Groothuis Oct. 29, 2011

Oct. 29, 2011

On 30/10/2011, at 01:06 , Andreas Radke wrote: > Am Sun, 30 Oct 2011 00:53:11 +1100 > schrieb Edwin Groothuis <edwin(a)mavetju.org>: > >> Is that with 2011l or with 2011m? >> >> It is a known problem in 2011l, it is fixed in 2011m with the removal >> of the second MD line. Just add "Most locations" behind the second MD >> line if you want to run 2011l. >> >> Edwin > > That is with 2011m. So it seems not fixed here. You are right. In the email with subject "[tz] Proposed time zone package changes (Fiji, Pridnestrovie Moldova)" it had the zone.tab fixed. Now it seems that the 2011m does still have them: [~/tzdata] edwin@minimac>curl -o a.tgz ftp://munnari.oz.au/pub/tzdata2011m.tar.gz […] [~/tzdata] edwin@minimac>tar zxf a.tgz [~/tzdata] edwin@minimac>grep MD zone.tab MD +4700+02850 Europe/Chisinau MD +4651+02938 Europe/Tiraspol Pridnestrovie While the email said: -# @(#)zone.tab 8.50 +# @(#)zone.tab 8.52 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. # @@ -258,7 +258,6 @@ MA +3339-00735 Africa/Casablanca MC +4342+00723 Europe/Monaco MD +4700+02850 Europe/Chisinau -MD +4651+02938 Europe/Tiraspol Pridnestrovie ME +4226+01916 Europe/Podgorica MF +1804-06305 America/Marigot MG -1855+04731 Indian/Antananarivo Edwin

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UK news about Rebecca Harris' Daylight Saving Bill (no changes yet)
by Peter Ilieve Oct. 28, 2011

Oct. 28, 2011

In January I sent something about the latest attempt to change the clocks in the UK: MP Rebecca Harris' Daylight Saving Bill (a private members' Bill). If passed, this Bill might result in the UK moving the clocks forward an hour so we match most of Europe. The Bill is still waiting for its committee stage, the next stage of its passage though Parliament. Today the Department for Business, Innovation and Skills issued a press release saying they will be tabling amendments to the Bill, with the implication that if passed, the government might support it. The main thing mentioned is a requirement to consult the devolved administrations in Scotland and Wales, and to get the agreement of the Northern Ireland administration. There is also mention of changing the Bill's independent commission (that would assess the study that the Bill proposes) into an independent oversight group that would advise the government. The amendments haven't appeared on the Bill's pages on the Parliament website yet, but they look like wrecking amendments to me, rather than any evidence of the government changing its mind. The chances of the Scottish government agreeing to this are very low as polls have always shown most Scots are against advancing the clocks. The change from the commission to an oversight group looks like an attempt to change it into something the government can ignore, whatever it reports. The press release says the Bill's committee stage is expected in early November so something should happen soon. The press release is at <http://nds.coi.gov.uk/content/Detail.aspx?ReleaseID=421778&NewsAreaID=2> and the Bill's main page is at <http://services.parliament.uk/bills/2010-11/daylightsaving.html>. -- Peter Ilieve peter(a)aldie.co.uk

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Re: [tz] Is there a high-level conversion process description available?
by Willy＠willylorenzo.com Oct. 27, 2011

Oct. 27, 2011

That's okay. My compiler is done and I can now create a database containing transitions for each zone. Thanks everyone for the help and the indirect help I received through the archive. Willy ----- Original Message ----- On Mon Oct 24 14:43:41 2011"Steve Allen" <sla(a)ucolick.org> wrote: > On Mon 2011-10-24T14:21:04 -0400, Willy(a)willylorenzo.com hath writ: > > Yes, it would be nice to use the binaries, but I have to provide a complete > > solution that can, upon someone retrieving and extracting the tz data, > > update the db with a click of a button on a Windows computer. > > Unless I'm mistaken one of the goals of the CalConnect Timezone > Technical Committee effort is to define network server mechanism for > providing zoneinfo to any client which needs to know that. > Is this the sort of project which can wait for that spec to mature and > use its data? If so that might be preferable to inventing yet another > mechanism.

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Robert Elz as TZ coordinator and designated technical expert
by Marshall Eubanks Oct. 26, 2011

Oct. 26, 2011

Hello; I volunteered to act on the behalf of the Time Zone Database community and relay the call (by David Keegel) that the TZ mailing list has reached a consensus that Robert Elz ( kre(a)munnari.oz.au) should be TZ Coordinator, and the technical expert to IANA designated by the IESG, as is called for in draft-lear-iana-timezone-database-04 While that document has not been formally published by the IETF, it has been approved by the IESG and IANA is now administering the Time Zone database and mailing list under its provisions, so a technical expert is needed. On the primary thread discussing this on the TZML this there were over 20 messages and no opposition in over 2 weeks of LC, so I think that there is no doubt that the consensus is very solid. He has been acting in this role in a temporary capacity so there would be no perturbations caused by this appointment. Pete and Peter, could you please relay this to the entire IESG? I would be glad to answer any questions, and I am sure that David K would be as well. Regards Marshall Eubanks

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zdump issues
by Thom Hehl Oct. 24, 2011

Oct. 24, 2011

I'm trying to write a C++ wrapper for the timezone database. I have run ZIC to convert the data to binary files and know where these are. Now I'm having a look at zdump because, when I'm done, I want to convert UTC to a time zone of my choice. Problem is when I run zdump it never seems to return anything different. E.g., thom@hehl /cygdrive/c/javatools/tzinfo/src $ ./zdump America/Anchorage America/Anchorage Mon Oct 24 19:46:24 2011 GMT thom@hehl /cygdrive/c/javatools/tzinfo/src $ ./zdump America/Chicago America/Chicago Mon Oct 24 19:46:34 2011 GMT thom@hehl /cygdrive/c/javatools/tzinfo/src $ ./zdump America/Kentucky/Louiville America/Kentucky/Louiville Mon Oct 24 19:48:21 2011 GMT My clock is current set to Eastern Daylight. Thanks.

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Re: [tz] Is there a high-level conversion process description available?
by Willy＠willylorenzo.com Oct. 24, 2011

Oct. 24, 2011

Yes, it would be nice to use the binaries, but I have to provide a complete solution that can, upon someone retrieving and extracting the tz data, update the db with a click of a button on a Windows computer. So I have to compile the data myself. If the format of the data files changes, that's fine...I'll just update the process. It doesn't seem too difficult, though. Reading some of the messages in the archive has helped me to better understand the process. I basically have to create UTC transition dates for every year covered by an individual rule. I create a date/time from the rule, adjust it by the GMTOFF of the zone (accounting for u indicators,) and then adjust it by any daylight saving time that might be in effect from a previous rule (accounting for s indicators.) That's not so bad. I'm still trying to figure out a slick way of handling max, though. On Mon Oct 24 05:23:23 2011"Alois Treindl" <alois(a)astro.ch> wrote: > > Personally, I would not recommend of writing yet another tz compiler. Reading and processing the binary files created by zic seems to me a much cleaner and more reliable approach.

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Ukraine and DST
by Denys Gavrysh Oct. 24, 2011

Oct. 24, 2011

Hello. On September 20, 2011 the deputies of the Ukrainian parliament (Verkhovna Rada) agreed to abolish the transfer clock to winter time. But on October 19 that decision was finally canceled. Here is an official document (in Ukrainian): http://w1.c1.rada.gov.ua/pls/zweb_n/webproc4_1?id=&pf3511=41484 I wrote a patch for latest tzdata archive that returns daylight saving time for Ukraine (in attachment). We very need it.

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Is there a high-level conversion process description available?
by Willy＠willylorenzo.com Oct. 24, 2011

Oct. 24, 2011

I was wondering if there exists a high-level description of the process of converting a wall-time from one zone into UTC (and vice-versa) that describes the conversion using the text based zone information (the rules and zones) rather than referencing the binary files. If conversions simply cant be done that way because they require additional data thats produced by zic, then Id like to know that too. Im attempting an implementation of the TZ database in a system called Lotus Notes, which uses a BASIC like language for programming called LotusScript. So I pretty much have to build everything from scratch...which is fine. Im going through the archives and Ive already found good info there from the recent "Time zone confusion and implementation hints" thread back in July (dont know why Yves Goergen didnt want to install Cygwin...5 minutes after reading that message I had Cygwin installed and was reviewing those tzinfo files!) But Im still looking for (what seems to be) basic information, such as can the tz code convert 2011-11-06 1:30 AM America/New_York? That date seems to gets different results based on which converter I use online, as it would appear that you have to know the DST status in order to get the DST status to convert to UTC. I know nothing about Unix or the c/c++/java languages so I know have a steep learning curve if I want to understand the existing tz code...but Im hoping that if I can understand the zone conversion process then I can write the necessary code. Ive got the nearly 5300 lines of rules, zones, leaps, and links stored in a Notes db for easier manipulation, and I can take a zone UNTIL or a rule and year and produce a date from it. So its a start. Thanks. Willy Lorenzo

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Introduction and apology for slamming you "with that TZ is a legal thing" commentary out of the blue.
by Todd Glassey Oct. 24, 2011

Oct. 24, 2011

So I need to properly introduce myself to explain why I said what I said on the list. I am a professional timekeeper meaning that I and my team operate clocks which end users rely on. My team runs 10 of the NIST public access timebase systems and is expanding the availability of UTC to include PTP and other evidence-control tools as add-ons for traceable time. That said - the TZ data is used in virtually all commercial and electronic document/instrument processing systems operational today. The problem is that the Time Zone data itself (while created through a standards process) has largely been managed as an ad-hoc offering and this was accepted everywhere because the party and hosting entity for this were the US Government NIH and Dr. Olson. But with the good Dr.s retirement there is a need to formalize this process and expand its controls so that the data remains both properly managed and available to all. So the question is how to do that, and I have pushed back that this effort is much more important and needs to be managed outside an IETF process because of the lack of control the IETF has designed into its framework. This specific project is one which needs a level of oversight that the IETF process doesnt put in place for changes and content updates to the DB. What needs to happen I believe is that this effort should define a process wherein any legal authority can request a IANA update to the data base and have that processed in a fixed timeframe outside of any continued IETF review. This is not an excuse to make a new IETF WG to control the world... its about letting the world operate in a manner which doesnt impose the IETF's judgement or political opinions on anyone either. That said my proposal is to morph the current I-D by adding an inline update process to the CONTENT RECORDS of the DB and a NEW RECORD Addition Policy and Practice through IANA and not the IETF. In closing - My apologies for antagonizing anyone, and I would point out that since we do about 300M timesettings per day - all tied to TZ's I would retort I may be one of the only people here who is NOT a troll... Todd -- Todd S. Glassey - CISM CIFI CTO Certichron Inc This message contains information which may be confidential and/or privileged. Unless you are the intended recipient (or authorized to receive for the intended recipient), you may not read, use, copy or disclose to anyone the message or any information contained in the message. If you have received the message in error, please advise the sender by reply e-mail and delete the message and any attachment(s) thereto without retaining any copies. Further we have a formal OPT OUT Policy posted on our website pertaining to the use of any Email Addresses gleaned or taken from any source, web, mailing lists, previous customer lists etc. In all instances we choose to formally OPT OUT and this notice constitutes formal disclosure that you may not collect, buy or sell or provide access to this email address or any pertaining to our DNS MX Record Publication License posted on the web at http://www-wp.certichron.com/?page_id=3947.

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