- tz - lists.iana.org

Scheduling - use case for acronyms
by Tobias Conradi April 2, 2013

April 2, 2013

Was: [tz] Ambiguous abbreviations for Australian timezones when daylight savings is in affect On Tue, Apr 2, 2013 at 7:08 PM, Russ Allbery <rra(a)stanford.edu> wrote: > Humans don't need the abbreviation and don't care. False - as numerous emails and usages demonstrate. > They either schedule > the meeting in local time That might be unknown or ambiguous. > or in the current time in some other time zone Exactly, and that would be communicated how, in a brief manner - as Mark used in "Mondays at 8:00 PT" > (or possibly in UTC) UTC might be unknown at time of scheduling or not decipherable by the receiver. -- Tobias Conradi Rheinsberger Str. 18 10115 Berlin Germany http://tobiasconradi.com/

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Blame it on Caesar, talk from PyCon 2013
by Stuart Bishop April 2, 2013

April 2, 2013

People on this list may be interested in this talk from PyCon 2013, available on YouTube at http://www.youtube.com/watch?v=GBKqRhn0ekM In it Lennart Regebro provides an overview of historical calendars before moving onto the modern real world issues developers face when dealing with calendaring. -- Stuart Bishop <stuart(a)stuartbishop.net> http://www.stuartbishop.net/

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Australian Timezone Abreviations (Daylight Savings Time) [SEC=UNOFFICIAL]
by Peter Stagg March 31, 2013

March 31, 2013

I have resently had the clasic issue at work with strftime returning only EST, CST (Standard Time) etc. as the timezone abreviation for Australian time zones even when where in daylight savings time. Given that the Australian Government now has offical advice as to what these abreviations should be <http://australia.gov.au/about-australia/our-country/time#daylightsaving> would it not be possible to include them in the data now? Regards, Peter Stagg | Web Developer, Radar Systems Bureau of Meteorology Australian Meteorological Data Information Services System (AMDISS) Bureau of Meteorology GPO Box 1289 Melbourne VIC 3001 Level 6, 700 Collins Street, Docklands VIC 3008 Tel: +61 3 9669 4232 | Fax: +61 3 9669 4128 www.bom.gov.au

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Ukraine time changes
by Michael Hustwait March 25, 2013

March 25, 2013

Hi there As a reader of your website I understand ukraine is due to scrap dst from end march 2013 and stay on winter trime permanently Is this still the case? Regards Michael Hustwait Watford London England

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Praguay DST Update
by Juan Carlos YJ. Lin March 25, 2013

March 25, 2013

Dear Paul Eggert I will like to contribute to update Paraguay DST timezone info. At 2013-b (Released 2013-03-11 ) Paraguay DST is set as no permanent change. Since there is a decree 10.780 ( 2013-03-15 ) that make the change permanent, the database should be updated. Summary # From Juan Carlos YJ Lin ( 2013-03-25 ) # A decree by President was issued in Paraguay (no. 10780) on 2013-03-15 that changed the # DST method to be from the first Sunday in October to the fourth Sunday in March (60 minutes) # So the change is permanent. Attached the decree pdf issued by Paraguay President You can find it out in by searching 10780 decree at http://www.presidencia.gov.py/decretos.php Juan Carlos Lin Unisoft S.A. +595-993-288330 --------------------------------------------------- "Antes de imprimir, recuC)rdese de su compromiso con el Medio Ambiente" "Aviso: Este mensaje es dirigido para su destinatario y contiene informaciones que no pueden ser usadas por otras personas que no sean su(s) destinatario(s). La retransmisiC3n del contenido no estC! autorizada fuera del contexto de su envC-o y a quien corresponde. El uso no autorizado de la informaciC3n en este mensaje se halla penado por las leyes vigentes en todo el mundo. Si ha recibido este mensaje por error, por favor bC3rrala y notifique al remitente en la brevedad posible. El contenido de este mensaje no es responsabilidad de la Empresa y debe ser atribuido siempre a su autor. Gracias."

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Paraguay DST Changes
by Juan Carlos YJ. Lin March 25, 2013

March 25, 2013

Dear Paul Eggert I will like to contribute to update Paraguay DST timezone info. At 2013-b (Released 2013-03-11) Paraguay DST is set as no permanent change. Since there is a decree 10.780 (2013-03-15) that make the change permanent, the database should be updated. Summary # From Juan Carlos YJ Lin (2013-03-25) # A decree by President was issued in Paraguay (no. 10780) on 2013-03-15 that changed the # DST method to be from the first Sunday in October to the fourth Sunday in March (60 minutes) # So the change is permanent. Attached the decree pdf issued by Paraguay President You can find it out in by searching 10780 decree at http://www.presidencia.gov.py/decretos.php JUAN CARLOS YJ LIN Tecnología de la Información MONALISA Internacional SA Boquerón 310 Ciudad del Este – PARAGUAY Tel + 595 61 500 645 Fax + 595 61 512 695 lin(a)monalisa.com.py www.monalisa.com.py --------------------------------------------------- "Antes de imprimir, recuérdese de su compromiso con el Medio Ambiente" "Aviso: Este mensaje es dirigido para su destinatario y contiene informaciones que no pueden ser usadas por otras personas que no sean su(s) destinatario(s). La retransmisión del contenido no está autorizada fuera del contexto de su envío y a quien corresponde. El uso no autorizado de la información en este mensaje se halla penado por las leyes vigentes en todo el mundo. Si ha recibido este mensaje por error, por favor bórrala y notifique al remitente en la brevedad posible. El contenido de este mensaje no es responsabilidad de la Empresa y debe ser atribuido siempre a su autor. Gracias."

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Turkey DST time
by Serkan Kaba March 25, 2013

March 25, 2013

Hi, The time at night where Turkey switches to DST is different from rest of the Europe. Please check http://www.timeanddate.com/worldclock/clockchange.html?n=19&year=2013 for details. Regards, Serkan

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Re: [tz] Turkey DST time
by Serkan Kaba March 25, 2013

March 25, 2013

Merhaba, Yes apparently that's the case. Thanks for validating this. There are plans for fixing the timezone to UTC+3 in 2014 but we'll see. Regards, Serkan ________________________________ From: Even Scharning <tzdb(a)time.is> To: Serkan Kaba <serkan_kaba(a)yahoo.com> Sent: Monday, March 25, 2013 7:05 AM Subject: Re: [tz] Turkey DST time Merhaba Serkan, Turkey is constantly one hour ahead of most of Europe, but the DST switch occurs simultaneously in Turkey and Europe. The rules in the Time Zone Database are correct. This page illustrates the upcoming DST switch: http://time.is/compare/0000_31_Mar_2013_UTC/CET/Turkey Sincerely, Even Scharning Time.is - exact time, any time zone http://time.is/ On 2013-03-25 7:18, Serkan Kaba wrote: > Hi, > > The time at night where Turkey switches to DST is different from rest > of the Europe. Please check > http://www.timeanddate.com/worldclock/clockchange.html?n=19&year=2013 > [1] for details. > > Regards, > Serkan

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Chile DST
by Carlos Moffat March 22, 2013

March 22, 2013

Hi Guys, It looks like the announcment of 2013-B has Chile going from GMT-3 to GMT-4 on April 23rd and the opposite on Sep 2nd. However, the correct dates are April 28th and Sep 7th. An official source for this stuff in Chile is the Navy's "Hora Oficial" website: http://www.horaoficial.cl/cambio.htm All the best, Carlos

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Missing functionality (general question) - C11 functions, Localization, etc...
by random832＠fastmail.us March 21, 2013

March 21, 2013

In working on a windows/MSVC port of tzcode, I have run into the issue of functions that MSVCRT implements that tzcode does not, and the question of how much of it to implement. Part of the reason you haven't heard anything more from me even though I've had the code itself building for weeks is that it's hard to really determine when I can declare it "finished". Some of it are newer standard functions (wcstime from C95, localtime_s from C11), some are functions created by microsoft that no-one else has (_dstbias to match timezone and daylight, _mkgmtime which is their name for timegm, _wctime which is a wide character version of ctime), some of it is an artifact of them simultaneously supporting 32- and 64-bit time_t, and some of it are old unix functions (e.g. ftime) that MS happens to implement and tzcode does not. Some of these functions are problematic to implement in a third-party library. The means by which localtime_s and others in that family are meant to call their error handlers is not specified in C11, and MSVC uses a different (and nonstandard even though the standard was proposed by microsoft) mechanism from slibc. There's also miscellaneous other bits of missing functionality. strftime provides some localization functionality for months and weekdays, but not for e.g. %E and %O or for timezone abbreviations. Also, since the tzdata file format itself contains no provision for localization, I can't think of any C implementation that _does_ implement localized timezone abbreviations (I think there are some in other languages that use the tz data in combination with the CLDR data) As an aside, support for localized timezone abbreviations might be a solution to the AEST/EST half of the australian timezone debate. I get the impression (based on a comment in the section on Canadian timezones) that it was decided in 1994 that localization would be someone else's problem, and this was never revisited, nor actually became anyone else's problem. More than this, my main question is - what is the role of tzcode - the library functions, that is, not the tools - itself? Is it simply a reference implementation, to be used by libc maintainers and integrated into their libraries as they see fit? Is it meant to be used as a drop-in replacement for the system libc's time functions by application developers who need consistent timezone handling? In short - is there a roadmap for adding new functionality to tzcode, and/or is there any reason _not_ to do so besides not having anyone volunteering to work on it (I can look at it, but I don't want to if it's going to be rejected, or if there's no point) -- Random832

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