July 2007 - tz - lists.iana.org

FW: Does UTC+14 Still Exist?
by Olson, Arthur David (NIH/NCI) [E] July 18, 2007

July 18, 2007

I'm forwarding this message from Robert Chapin who is not on the time zone mailing list. Those of you who are on the time zone mailing list should direct replies appropriately. --ado -----Original Message----- From: Robert Chapin [mailto:tz@info-svc.com] Sent: Tuesday, June 26, 2007 10:47 PM To: tz(a)lecserver.nci.nih.gov Subject: Does UTC+14 Still Exist? The latest CIA map doesn't have the UTC+14 time zone on it.. https://www.cia.gov/library/publications/the-world-factbook/reference_ma ps/p df/time_zones.pdf I'm curious if this is accurate? _____________ Robert Chapin

2 1

FW: Vietnam: Saigon is deprecated, should use capital Hanoi
by Olson, Arthur David (NIH/NCI) [E] July 13, 2007

July 13, 2007

I'm forwarding this message from Martin Pitt, who is not on the time zone mailing list. Those of you who are on the time zone mailing list should direct replies appropriately. --ado -----Original Message----- From: Martin Pitt [mailto:martin.pitt@ubuntu.com] Sent: Friday, June 22, 2007 2:27 AM To: tz(a)lecserver.nci.nih.gov Cc: 121540(a)bugs.launchpad.net Subject: Vietnam: Saigon is deprecated, should use capital Hanoi Hello Arthur and tzdata team, we just got this tzdata bug in Ubuntu: https://bugs.launchpad.net/ubuntu/+source/tzdata/+bug/121540 which points out that "Saigon" has been renamed to "Ho Chi Minh" a long time ago. The comment in the asia file already mentions that: # Saigon's official name is Thanh-Pho Ho Chi Minh, but it's too long. # We'll stick with the traditional name for now. A nice solution to avoid obsolete names, retain a short name, and even get more consistent is to use "Hanoi", which is the actual capital of Vietnam (and is the very same TZ). Then Saigon could just be an alias (i. e. transitional symlink) to Hanoi. What do you think about that? Thank you in advance, Martin -- Martin Pitt http://www.piware.de Ubuntu Developer http://www.ubuntu.com Debian Developer http://www.debian.org

10 12

FW: Localization of timezones from zone.tab
by Olson, Arthur David (NIH/NCI) [E] July 12, 2007

July 12, 2007

I'm forwarding this message from Vincent Untz, who is not on the time zone mailing list. Those of you who are on the time zone mailing list should direct replies appropriately. --ado -----Original Message----- From: Vincent Untz [mailto:vuntz@gnome.org] Sent: Tuesday, July 10, 2007 1:24 PM To: tz(a)lecserver.nci.nih.gov Subject: Localization of timezones from zone.tab Hi, [please keep me cc'ed since I'm not subscribed to this list] I know that, at least in GNOME, there are now three places where we parse zone.tab to get a list of timezones supported by the OS. I suppose other projects are also doing this. This list is then presented to the user to let him choose the timezone. The problem here is that we let the user choose strings which look like "Antarctica/South_Pole". This is not really good for non-english-speaking people ;-) Of course, we can add all the timezones to our list of strings to translate, but this means all projects needing to do so will duplicate this work and the translations. I'd like the tz database to ship translations in po files. This would imply the following: + create a small script to generate a POT file from zone.tab (easy) + submit the POT file to the translation project [1] (or any other place that helps with translation) + add the po files for translation to the tz database + choose a gettext domain (Of course, I'm quite probably forgetting about a step :-)) I've seen that this topic has been discussed before [2], but the proposition there was really more ambitious, so I'm hoping a simple approach would be welcomed. What do you think? Thanks, [1] http://translationproject.org/ [2] http://osdir.com/ml/time.tz/2004-09/msg00000.html Vincent -- Les gens heureux ne sont pas pressés.

4 3

Is there a list of "current" time zones?
by Tim Klein July 11, 2007

July 11, 2007

I'm new here. As I look through the tz database, and the archives of this mailing list, I realize what a phenomenal effort you folks have put in, to make all of this information available. Thank you for all you've done! A question... I'm helping to write an application that needs a menu for the user to choose what time zone they live in. With ~400 time zones in the database, that'd be a pretty daunting pull-down menu. But as I understand it, a significant fraction of the ~400 time zones exist only for historical reasons. Since our application will deal only with current and future times, historical distinctions don't matter, and we'd like the menu to show only the subset of time zones that are currently "in effect". (And we don't mind if it isn't painstakingly accurate or updated in real time.) Has anyone created such a list? Or maybe an algorithm (if not code) for generating one from the full database? I see that this question has come up in the past. To quote from the archives... ====== >From: "Andy Lipscomb" <AndyLipscomb(a)decosimo.com> >Perhaps a better term would be "historical" time zones. This would >in fact be a useful distinction, since only a relatively small >subset of the timezones are necessary for applications that look >only forward--these would be the first set to present to a user for >selecting a time zone, with a "show all" option to get the complete >list. (For example, the 50 United States can be covered on a >forward-looking basis by eight zones--New York, Chicago, Denver, >Phoenix, Los Angeles, Anchorage, Adak, and Honolulu. And if one >takes as irrevocable the power of the EU over DST dates, then--for >example--London, Paris, and Helsinki would cover that entire area, >except for the different abbreviations used in the three +0 >countries.) ====== And... >From: Paul Eggert [mailto:eggert@CS.UCLA.EDU] >Sent: November 6, 2006 12:13 PM > >> Is there any way to flag some of the old historical zones such that >> they don't appear when running "tzselect"? > >We could have a table for people who don't care about historical >times, which maps zone names to "modern" zone names, and tzselect >could have an option to use that table. ====== Thank you very much for any wisdom on this subject! Tim Klein Dallas, Texas, USA

1 1

FW: Time Zone mapping --> Windows ???
by Olson, Arthur David (NIH/NCI) [E] July 11, 2007

July 11, 2007

I'm forwarding this message from Boris Lang, who is not on the time zone mailing list. Those of you who are on the time zone mailing list should direct replies appropriately. --ado -----Original Message----- From: BORIS LANG [mailto:BORIS.LANG@MEMO.IKEA.COM] Sent: Tuesday, July 10, 2007 8:55 AM To: tz(a)lecserver.nci.nih.gov Subject: Time Zone mapping --> Windows ??? --- Received from IKEA4.BRLG +49 6122 5858276 07-07-10 14.56 -------------------------------------- Hi, we are working on the implementation of time zone information into an application using the tz database. TZ data names will be our main type but we also need to do a mapping to the time zone names used in windows. i.e. Europe/Berlin (tzd) --> Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna (Windows) The problem is that I can´t find a complete list that contains the mapping from tz database to windows. Can somebody please help us? Is there already such a list existing? Best regards Boris Lang ------ IKEA IT Germany GmbH Am Wandersmann 2-4 65719 Hofheim-Wallau Sitz München HR B 79392, Amtsgericht München Geschäftsführer: Manfred Godlewski, Göran Sjöstrand, Ola Troedsson ---- 07-07-10 14.56 ---- Sent to --------------------------------------------------------------------------------- -> tz(a)elsie.nci.nih.gov

4 3

Re: FW: Localization of timezones from zone.tab
by Mark Davis July 10, 2007

July 10, 2007

There is a users group at http://www.unicode.org/consortium/distlist.html#cldr_list. You can post suggestions/requests via the bug form on http://www.unicode.org/cldr/bugs/locale-bugs. If you belong to a Unicode member organization (http://www.unicode.org/consortium/memblogo.html) you can get on the internal list and even (if you choose) the weekly teleconference. Mark On 7/10/07, Chuck Soper <chucks2(a)veladg.com> wrote: > > Thanks for your response. I now remember meeting someone from IBM at an > IMUG meeting at Apple; he described metazones. > > What is the best way for me to stay informed of CLDR related to time > zones? And is there a way to make comments, suggestions or discuss? > > Chuck > > At 1:54 PM -0700 7/10/07, Mark Davis wrote: > > We have actually instituted an alternative mechanism called 'metazones', > which are somewhat like what you describe. They basically coalesce zones > that have the same behavior in modern time. However, they have some further > restrictions, and we only put this in recently thus haven't gathered enough > data to be useful yet. > > Mark > > On 7/10/07,* Chuck Soper* <chucks2(a)veladg.com> wrote: > > I've been on the tz list for several years. I have tried to follow the > Time Zone Localizations topic for CLDR. > > > I do not understand why translations would be supplied for timezone IDs > (tzIDs). Many tzIDs refer to the same time zone name. For example, I believe > that Argentina has 2 time zone names, yet it has 10 tzIDs to handle DST > rules for various states. Does this mean that 20 localized names would be > required for Argentina? Does this mean that a new tzID would not be > localized? > > > Looking at 381 tzIDs of a tzData version (from 2006), I multiply it by two > (for std and dst names) to obtain 762 time zone names required. By removing > names of tzIDs that do not recognize DST and removing tzIDs that refer to > the same time name (e.g. many tzIDs refer to Central European Time), I was > to reduce total time zone names from 762 to 212. > > > Can over 500 names can be removed from the translation list? Multiplying > 500 potentially unneeded names by the number of translations would result in > a large reduction of translation efforts. > > > My approach is dependent on having a stable list of time zone names. As > far as I know, such a list does not exist. If such a list existed, I would > envision tzIDs being mapped to the 'time zone name' list. > > > Chuck > > > > At 10:44 AM -0700 7/10/07, Mark Davis wrote: > > The Unicode CLDR project (http://unicode.org/cldr/) does supply > translations for timezone IDs. There are a few caveats. > > 1. The timezone database really has equivalence classes of IDs. One > of these can be used as a representative for any in the equivalence class. > It is the zone.tab file that contains such IDs. CLDR started by using that > file, but unfortunately it is not stable (different equivalent IDs can be > substituted at any time). So what we do is use as the representative the one > that historically the first one used in any zone.tab file (after CLDR > started). > > 2. We allow, but do not encourage, translation of zones that are the > only zone in a country. For that we use the country name. This cuts down > very substantially on the number of translations needed. That is, you would > see the equivalent of "Italy", and "United States (Los Angeles)" -- only in > the latter case do we need translations for the cities. > > 3. Translators can optionally add other variations: daylight (summer) > time, standard (winter) time, and generic time, both abbreviated and long. > > 4. These choices percolate out to clients of CLDR: Google, IBM, > Apple, Adobe, and many others. > > Mark > > On 7/10/07,* Olson, Arthur David (NIH/NCI) [E]* <olsona(a)dc37a.nci.nih.gov> > wrote: > > I'm forwarding this message from Vincent Untz, who is not on the time zone > mailing list. > > Those of you who are on the time zone mailing list should direct replies > appropriately. > > --ado > > -----Original Message----- > From: Vincent Untz [mailto: vuntz(a)gnome.org] > Sent: Tuesday, July 10, 2007 1:24 PM > To: tz(a)lecserver.nci.nih.gov > Subject: Localization of timezones from zone.tab > > Hi, > > [please keep me cc'ed since I'm not subscribed to this list] > > I know that, at least in GNOME, there are now three places where we > > parse zone.tab to get a list of timezones supported by the OS. I suppose > other projects are also doing this. This list is then presented to the > user to let him choose the timezone. > > The problem here is that we let the user choose strings which look like > "Antarctica/South_Pole". This is not really good for > non-english-speaking people ;-) > > Of course, we can add all the timezones to our list of strings to > translate, but this means all projects needing to do so will duplicate > this work and the translations. > > I'd like the tz database to ship translations in po files. This would > imply the following: > > + create a small script to generate a POT file from zone.tab (easy) > + submit the POT file to the translation project [1] (or any other > > place that helps with translation) > > + add the po files for translation to the tz database > + choose a gettext domain > > (Of course, I'm quite probably forgetting about a step :-)) > > I've seen that this topic has been discussed before [2], but the > proposition there was really more ambitious, so I'm hoping a simple > approach would be welcomed. > > What do you think? > > Thanks, > > [1] http://translationproject.org/ > [2] http://osdir.com/ml/time.tz/2004-09/msg00000.html > > Vincent > > -- > Les gens heureux ne sont pas pressés. > > > > > -- > Mark > > > > > > -- > Mark > > > -- Mark

1 0

Re: FW: Localization of timezones from zone.tab
by Mark Davis July 10, 2007

July 10, 2007

We have actually instituted an alternative mechanism called 'metazones', which are somewhat like what you describe. They basically coalesce zones that have the same behavior in modern time. However, they have some further restrictions, and we only put this in recently thus haven't gathered enough data to be useful yet. Mark On 7/10/07, Chuck Soper <chucks2(a)veladg.com> wrote: > > I've been on the tz list for several years. I have tried to follow the > Time Zone Localizations topic for CLDR. > > I do not understand why translations would be supplied for timezone IDs > (tzIDs). Many tzIDs refer to the same time zone name. For example, I believe > that Argentina has 2 time zone names, yet it has 10 tzIDs to handle DST > rules for various states. Does this mean that 20 localized names would be > required for Argentina? Does this mean that a new tzID would not be > localized? > > Looking at 381 tzIDs of a tzData version (from 2006), I multiply it by two > (for std and dst names) to obtain 762 time zone names required. By removing > names of tzIDs that do not recognize DST and removing tzIDs that refer to > the same time name (e.g. many tzIDs refer to Central European Time), I was > to reduce total time zone names from 762 to 212. > > Can over 500 names can be removed from the translation list? Multiplying > 500 potentially unneeded names by the number of translations would result in > a large reduction of translation efforts. > > My approach is dependent on having a stable list of time zone names. As > far as I know, such a list does not exist. If such a list existed, I would > envision tzIDs being mapped to the 'time zone name' list. > > Chuck > > > At 10:44 AM -0700 7/10/07, Mark Davis wrote: > > The Unicode CLDR project (http://unicode.org/cldr/) does supply > translations for timezone IDs. There are a few caveats. > > 1. The timezone database really has equivalence classes of IDs. One > of these can be used as a representative for any in the equivalence class. > It is the zone.tab file that contains such IDs. CLDR started by using that > file, but unfortunately it is not stable (different equivalent IDs can be > substituted at any time). So what we do is use as the representative the one > that historically the first one used in any zone.tab file (after CLDR > started). > > 2. We allow, but do not encourage, translation of zones that are the > only zone in a country. For that we use the country name. This cuts down > very substantially on the number of translations needed. That is, you would > see the equivalent of "Italy", and "United States (Los Angeles)" -- only in > the latter case do we need translations for the cities. > > 3. Translators can optionally add other variations: daylight (summer) > time, standard (winter) time, and generic time, both abbreviated and long. > > 4. These choices percolate out to clients of CLDR: Google, IBM, > Apple, Adobe, and many others. > > Mark > > On 7/10/07,* Olson, Arthur David (NIH/NCI) [E]* <olsona(a)dc37a.nci.nih.gov> > wrote: > > I'm forwarding this message from Vincent Untz, who is not on the time zone > mailing list. > > Those of you who are on the time zone mailing list should direct replies > appropriately. > > --ado > > -----Original Message----- > From: Vincent Untz [mailto: vuntz(a)gnome.org] > Sent: Tuesday, July 10, 2007 1:24 PM > To: tz(a)lecserver.nci.nih.gov > Subject: Localization of timezones from zone.tab > > Hi, > > [please keep me cc'ed since I'm not subscribed to this list] > > I know that, at least in GNOME, there are now three places where we > parse zone.tab to get a list of timezones supported by the OS. I suppose > other projects are also doing this. This list is then presented to the > user to let him choose the timezone. > > The problem here is that we let the user choose strings which look like > "Antarctica/South_Pole". This is not really good for > non-english-speaking people ;-) > > Of course, we can add all the timezones to our list of strings to > translate, but this means all projects needing to do so will duplicate > this work and the translations. > > I'd like the tz database to ship translations in po files. This would > imply the following: > > + create a small script to generate a POT file from zone.tab (easy) > + submit the POT file to the translation project [1] (or any other > > place that helps with translation) > > + add the po files for translation to the tz database > + choose a gettext domain > > (Of course, I'm quite probably forgetting about a step :-)) > > I've seen that this topic has been discussed before [2], but the > proposition there was really more ambitious, so I'm hoping a simple > approach would be welcomed. > > What do you think? > > Thanks, > > [1] http://translationproject.org/ > [2] http://osdir.com/ml/time.tz/2004-09/msg00000.html > > Vincent > > -- > Les gens heureux ne sont pas pressés. > > > > > -- > Mark > > > -- Mark

2 1

Re: FW: Localization of timezones from zone.tab
by Chuck Soper July 10, 2007

July 10, 2007

I've been on the tz list for several years. I have tried to follow the Time Zone Localizations topic for CLDR. I do not understand why translations would be supplied for timezone IDs (tzIDs). Many tzIDs refer to the same time zone name. For example, I believe that Argentina has 2 time zone names, yet it has 10 tzIDs to handle DST rules for various states. Does this mean that 20 localized names would be required for Argentina? Does this mean that a new tzID would not be localized? Looking at 381 tzIDs of a tzData version (from 2006), I multiply it by two (for std and dst names) to obtain 762 time zone names required. By removing names of tzIDs that do not recognize DST and removing tzIDs that refer to the same time name (e.g. many tzIDs refer to Central European Time), I was to reduce total time zone names from 762 to 212. Can over 500 names can be removed from the translation list? Multiplying 500 potentially unneeded names by the number of translations would result in a large reduction of translation efforts. My approach is dependent on having a stable list of time zone names. As far as I know, such a list does not exist. If such a list existed, I would envision tzIDs being mapped to the 'time zone name' list. Chuck At 10:44 AM -0700 7/10/07, Mark Davis wrote: >The Unicode CLDR project >(<http://unicode.org/cldr/>http://unicode.org/cldr/) >does supply translations for timezone IDs. There >are a few caveats. > >1. The timezone database really has >equivalence classes of IDs. One of these can be >used as a representative for any in the >equivalence class. It is the zone.tab file that >contains such IDs. CLDR started by using that >file, but unfortunately it is not stable >(different equivalent IDs can be substituted at >any time). So what we do is use as the >representative the one that historically the >first one used in any zone.tab file (after CLDR >started). >2. We allow, but do not encourage, >translation of zones that are the only zone in a >country. For that we use the country name. This >cuts down very substantially on the number of >translations needed. That is, you would see the >equivalent of "Italy", and "United States (Los >Angeles)" -- only in the latter case do we need >translations for the cities. >3. Translators can optionally add other >variations: daylight (summer) time, standard >(winter) time, and generic time, both >abbreviated and long. >4. These choices percolate out to clients of >CLDR: Google, IBM, Apple, Adobe, and many others. > >Mark > >On 7/10/07, Olson, Arthur David (NIH/NCI) [E] ><<mailto:olsona@dc37a.nci.nih.gov>olsona(a)dc37a.nci.nih.gov> >wrote: > >I'm forwarding this message from Vincent Untz, >who is not on the time zone mailing list. > >Those of you who are on the time zone mailing >list should direct replies appropriately. > > --ado > >-----Original Message----- >From: Vincent Untz [mailto:<mailto:vuntz@gnome.org> vuntz(a)gnome.org] >Sent: Tuesday, July 10, 2007 1:24 PM >To: <mailto:tz@lecserver.nci.nih.gov>tz(a)lecserver.nci.nih.gov >Subject: Localization of timezones from zone.tab > >Hi, > >[please keep me cc'ed since I'm not subscribed to this list] > >I know that, at least in GNOME, there are now three places where we >parse zone.tab to get a list of timezones supported by the OS. I suppose >other projects are also doing this. This list is then presented to the >user to let him choose the timezone. > >The problem here is that we let the user choose strings which look like >"Antarctica/South_Pole". This is not really good for >non-english-speaking people ;-) > >Of course, we can add all the timezones to our list of strings to >translate, but this means all projects needing to do so will duplicate >this work and the translations. > >I'd like the tz database to ship translations in po files. This would >imply the following: > >+ create a small script to generate a POT file from zone.tab (easy) >+ submit the POT file to the translation project [1] (or any other > place that helps with translation) >+ add the po files for translation to the tz database >+ choose a gettext domain > >(Of course, I'm quite probably forgetting about a step :-)) > >I've seen that this topic has been discussed before [2], but the >proposition there was really more ambitious, so I'm hoping a simple >approach would be welcomed. > >What do you think? > >Thanks, > >[1] <http://translationproject.org/>http://translationproject.org/ >[2] ><http://osdir.com/ml/time.tz/2004-09/msg00000.html> >http://osdir.com/ml/time.tz/2004-09/msg00000.html > >Vincent > >-- >Les gens heureux ne sont pas pressés. > > > > >-- >Mark

1 0

Localization of timezones from zone.tab
by Vincent Untz July 10, 2007

July 10, 2007

Hi, [please keep me cc'ed since I'm not subscribed to this list] I know that, at least in GNOME, there are now three places where we parse zone.tab to get a list of timezones supported by the OS. I suppose other projects are also doing this. This list is then presented to the user to let him choose the timezone. The problem here is that we let the user choose strings which look like "Antarctica/South_Pole". This is not really good for non-english-speaking people ;-) Of course, we can add all the timezones to our list of strings to translate, but this means all projects needing to do so will duplicate this work and the translations. I'd like the tz database to ship translations in po files. This would imply the following: + create a small script to generate a POT file from zone.tab (easy) + submit the POT file to the translation project [1] (or any other place that helps with translation) + add the po files for translation to the tz database + choose a gettext domain (Of course, I'm quite probably forgetting about a step :-)) I've seen that this topic has been discussed before [2], but the proposition there was really more ambitious, so I'm hoping a simple approach would be welcomed. What do you think? Thanks, [1] http://translationproject.org/ [2] http://osdir.com/ml/time.tz/2004-09/msg00000.html Vincent -- Les gens heureux ne sont pas pressés.

1 0

Re: Is there a list of "current" time zones?
by Philip Howell July 10, 2007

July 10, 2007

Hi Tim, In the tzdata tarball is a file called zone.tab. It lists the current time zones grouped by country code. Cheers, Phil Tim Klein wrote: > I'm new here. As I look through the tz database, and the archives of > this mailing list, I realize what a phenomenal effort you folks have > put in, to make all of this information available. Thank you for all > you've done! > > A question... > > I'm helping to write an application that needs a menu for the user to > choose what time zone they live in. With ~400 time zones in the > database, that'd be a pretty daunting pull-down menu. > > But as I understand it, a significant fraction of the ~400 time zones > exist only for historical reasons. Since our application will deal > only with current and future times, historical distinctions don't > matter, and we'd like the menu to show only the subset of time zones > that are currently "in effect". (And we don't mind if it isn't > painstakingly accurate or updated in real time.) > > Has anyone created such a list? Or maybe an algorithm (if not code) > for generating one from the full database? > > I see that this question has come up in the past. To quote from the > archives... > > ====== > >> From: "Andy Lipscomb" <AndyLipscomb(a)decosimo.com> >> Perhaps a better term would be "historical" time zones. This would in >> fact be a useful distinction, since only a relatively small subset of >> the timezones are necessary for applications that look only >> forward--these would be the first set to present to a user for >> selecting a time zone, with a "show all" option to get the complete >> list. (For example, the 50 United States can be covered on a >> forward-looking basis by eight zones--New York, Chicago, Denver, >> Phoenix, Los Angeles, Anchorage, Adak, and Honolulu. And if one takes >> as irrevocable the power of the EU over DST dates, then--for >> example--London, Paris, and Helsinki would cover that entire area, >> except for the different abbreviations used in the three +0 countries.) > > ====== > And... > >> From: Paul Eggert [mailto:eggert@CS.UCLA.EDU] >> Sent: November 6, 2006 12:13 PM >> >>> Is there any way to flag some of the old historical zones such that >>> they don't appear when running "tzselect"? >> >> We could have a table for people who don't care about historical >> times, which maps zone names to "modern" zone names, and tzselect >> could have an option to use that table. > > ====== > > Thank you very much for any wisdom on this subject! > > Tim Klein > Dallas, Texas, USA > >

1 0