- tz - lists.iana.org

End of DST 2007 in Cuba?
by Dirk Losch Oct. 5, 2007

Oct. 5, 2007

Hello, according to tzdata2007h the end of DST for Cuba is at the first Sunday in November: Rule Cuba 2007 max - Mar Sun>=8 0:00s 1:00 D Rule Cuba 2007 max - Nov Sun>=1 0:00s 0 S But some airlines use 2007-08-28 for the end of DST. So what is correct? Best regards dirk -- GMX FreeMail: 1 GB Postfach, 5 E-Mail-Adressen, 10 Free SMS. Alle Infos und kostenlose Anmeldung: http://www.gmx.net/de/go/freemail

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FW: tzcode2007h.tar.gz and tzdata2007h.tar.gz
by Burdman, Laura (IT) Oct. 4, 2007

Oct. 4, 2007

Hello: Please, subscribe my self to get the emails about TZ as below. Thanks, Laura Burdman Laura.burdman(a)morganstanley.com -----Original Message----- From: Olson, Arthur David (NIH/NCI) [E] [mailto:olsona@dc37a.nci.nih.gov] Sent: Monday, October 01, 2007 10:08 AM To: tz(a)lecserver.nci.nih.gov Subject: tzcode2007h.tar.gz and tzdata2007h.tar.gz The files... ftp://elsie.nci.nih.gov/pub/tzcode2007h.tar.gz ...and... ftp://elsie.nci.nih.gov/pub/tzdata2007h.tar.gz ...are now available; these reflect the changes circulated last week by Paul Eggert on the time zone mailing list, as well as an updated link to the ICU project in tz-link.htm. --ado -------------------------------------------------------- NOTICE: If received in error, please destroy and notify sender. Sender does not intend to waive confidentiality or privilege. Use of this email is prohibited when received in error.

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FW: Timezone Options for DHCP
by Olson, Arthur David (NIH/NCI) [E] Oct. 3, 2007

Oct. 3, 2007

I'm forwarding this message from Johnny Walker, who is not on the time zone mailing list. Those of you who are on the time zone list should direct replies appropriately. --ado From: johnny.walker(a)ubs.com [mailto:johnny.walker@ubs.com] Sent: Wednesday, October 03, 2007 3:16 To: tz(a)lecserver.nci.nih.gov Subject: Timezone Options for DHCP I found a non-functional link on http://www.twinsun.com/tz/tz-link.htm A Timezone Option for DHCP proposes a DHCP option for a server to configure a client's time zone and daylight saving settings automatically "Timezone Options for DHCP" is no longer a draft but a RFC (http://www.ietf.org/rfc/rfc4833.txt) All the best Johnny

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FW: Detroit/Cleveland time zones
by Olson, Arthur David (NIH/NCI) [E] Oct. 3, 2007

Oct. 3, 2007

I'm forwarding this message from Jeff Prucher, 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: Jeff Prucher [mailto:jeff@metaweb.com] Sent: Thursday, September 27, 2007 8:01 To: tz(a)lecserver.nci.nih.gov Subject: Detroit/Cleveland time zones Here is some support for Garland's assertion that ``Cleveland and Detroit advanced their clocks one hour in 1914.'' (Well, at least the Cleveland part.) This does suggest that parts of Ohio were in the central time zone before then, and not in North America/New York. >From "The Newark (Ohio) Daily Advocate", June 18, 1914, page 4, column 2: Cleveland and several other Ohio cities have recently changed or planned to change their clocks from Central to Eastern standard time. As every clock will be set one hour ahead, that means that there will be one hour more of day-light after supper or dinner, whichever the evening meal is called. >From "The Ogden (Utah) Standard", June 20, 1914, page 4, column 1 : Cleveland is about to change its clocks from central to eastern standard time, in order to make longer the period after working hours until dark. Jeff Prucher

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ahem....
by Alf Salte Oct. 3, 2007

Oct. 3, 2007

Should probably clarify that my comments regarding the code for timezone handling refers to the glibc implementation of timezone handling and glibc implmenetaiton of tzset(). After checking your code I see that your implementation varies from the one in glibc and so my question should probably be directed to glibc rather than at your tz package. Hope this clarifies my earlier comments. My questions are still such that I would like answers to them. How much work would it be to make an implementation that did something along the lines as described in my earlier mail? Looking at your code you appear to have a struct state that appear to contain the data which I described in my timezone_t type. Is that a correct understanding or are their details here that I have misunderstood? Alf

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use of global variables in time data.
by Alf Salte Oct. 3, 2007

Oct. 3, 2007

Now, don't get me wrong. We probably have to live with global variables in association with time for a long time - not the least because of backwards compatibility. However, I do feel that a more "object oriented" approach would be superior and wonder how hard it would be to make a rewrite of parts of the code so that one could provide such an interface. It would be particularly useful for languages like C++ etc but would also be useful for C as C too can handle object oriented type features as is handled in FILE etc. What I mean by object oriented approach here is not full fledged OOP - C is not an OO language. What I mean is simply that you can create an object that represent something and then reference that object to refer to that something later and then destroy it when no longer needed. With this in mind I would like a timezone_t type so that you could do something like: timezone_t * tzNY = tzmake("US/Eastern"); // EDT/EST timezone timezone_t * tzUTC = tzmake("Universal"); // or just mktz("") timezone_t * tzlocal = tzmake(NULL); Then you could do stuff like: struct tm nyTime, gmTime, localTime; time_t now; now = time(); tztime(& nyTime, & now, tzNY); // would do the same as gmtime(). tztime(& gmTime, & now, tzUTC); // would do the same as localtime(). tztime(& localtime, & now, tzlocal): // The last one could also be achieved by: tztime(& localtime, & now, NULL); tzrem(tzNY); tzrem(tzUTC); tzrem(tzlocal); ----------------- The existing approach appear simple enough but the problem is that tzset() has the following deficiencies as I see it: 1. It always only operate through TZ variable - would be nice if there was a version that took the data as string so that tzset() could essentially be implemented by calling that function with getenv("TZ") as argument. 2. It leaves the result in various global variables which are defined around the code. Would be nice if the function instead created a struct and kept all data that is to survive the function call within that struct. 3. For backwards compatibility then tzset() should essentially do the folowing: void tzset(void) { struct timezone_t * tzi = tzmake(getenv("TZ")); // copy data from tzi to various global variables. // timezone, altzone, daylight and tzname etc. // details of this depends on exactly what data // are stored in timezone_t // This could also be placed in a separate function // so user can set these variables based on a // previously generated tzmake() call. tzsettz(tzi); tzrem(tzi); } How much work would it take to do such a rewrite? After browsing the source I find that there are numerous global variables between tzset.c and tzfile.c that are not documented anywhere but still are used such as tz_rules and __use_tzfile just to name two of them. Also, if some applications want to avoid allocation of data one could have a version that took the timezone_t struct on input and filled it in. The problem here is how to handle timezone strings. However, assuming that timezone strings are usually small (3-5 letters max for strings like UTC, CEDT, etc.) one could define that timezone_t has allocated say 8 bytes for each of the strings so that it is fixed size. Then one could: struct timezone_t tzUTC; tzmake(& tzUTC, "Universal"); instead of the tzUTC = tzmake("Universal"); I wrote above. In this case the tzrem() function would not be necessary. Yet again both approaches would be possible where tzmake first malloc() a struct large enough to hold the data and then called the other version to fill in the struct. IN this case tzrem would still be needed and you would need two different versions of tzmake(). For example: timezone_t * tzcreate(getenv("TZ")); which was implemented as: timezone_t * tzcreate(const char * tzid) { timezone_t * res = malloc(sizeof(timezone_t)); if (res == NULL) return NULL; tzmake(res,tzid); return res; } Finally, and not really related to the above. I am trying at the moment to read and understand the code. I notice that the tzfile is opened with "rc" mode. I am not sure exactly what the "c" letter there indicates. It says something about prohibiting cancelattion but I am not exactly sure what that means in practice. Is it that if user interrupts the process while in the middle of say reading the file the interrupt will be waiting until the file is closed or what? Alf

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Timezone Options for DHCP
by johnny.walker＠ubs.com Oct. 3, 2007

Oct. 3, 2007

I found a non-functional link on http://www.twinsun.com/tz/tz-link.htm A Timezone Option for DHCP <ftp://ftp.rfc-editor.org/internet-drafts/draft-ietf-dhc-timezone-option -04.txt> proposes a DHCP <http://www.dhcp.org/> option for a server to configure a client's time zone and daylight saving settings automatically "Timezone Options for DHCP" is no longer a draft but a RFC (http://www.ietf.org/rfc/rfc4833.txt) All the best Johnny

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DST extended to November in Syria
by Steffen Thorsen Oct. 2, 2007

Oct. 2, 2007

It seems that Syria was not leaving daylight saving time on 2007-10-01, since it is in the middle of the holy Ramadan month. I have tried to find some info regarding the change, and found the following text in a newspaper (in Arabic): http://www.alwatan.sy/dindex.php?idn=18418 I cannot find that the exact date is there, but 2007-11-01 could be a likely date. Since 2008-10-01 also is in Ramadan (the last date of the month, probably), it is likely that also next year's end date is changed. Google's automated translation of the mentioned URL says: Government set to start with the beginning of winter time in November next unusually where the timing was unusual beginning with the month of October. The postponement of this year due to believe that the holy month of Ramadan and Eid, which ends with the middle of next month, so there is no irregularities in the fasting hours of magic and breakfast with changing times has been postponed to next month.

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Brazil's Time
by Haroldo Macedo Oct. 2, 2007

Oct. 2, 2007

Hello, I've noticed that the Brazil`s daylight saving time isn't updated in your site. It has been officially defined on Sept-26th, and starts on 14-oct-2007 and ends on 17-feb-2008. Below is the link to the Brazilian senate. http://www6.senado.gov.br/legislacao/ListaTextoIntegral.action?id=235121 Attn, -- Haroldo R. J. de Macêdo

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tzcode2007h.tar.gz and tzdata2007h.tar.gz
by Olson, Arthur David (NIH/NCI) [E] Oct. 1, 2007

Oct. 1, 2007

The files... ftp://elsie.nci.nih.gov/pub/tzcode2007h.tar.gz ...and... ftp://elsie.nci.nih.gov/pub/tzdata2007h.tar.gz ...are now available; these reflect the changes circulated last week by Paul Eggert on the time zone mailing list, as well as an updated link to the ICU project in tz-link.htm. --ado

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Brazil summer time 2007/2008
by Marcus Alves Grando Oct. 1, 2007

Oct. 1, 2007

Hi, Like another years, Brazil change summer time for this year. Can you update zoneinfo and release ASAP for inclusion in many distributions? Patch attached. Regards -- Marcus Alves Grando marcus(at)sbh.eng.br | Personal mnag(at)FreeBSD.org | FreeBSD.org

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new tz database implementation
by Rich Tibbett Sept. 29, 2007

Sept. 29, 2007

Hello, I'd like to let you know that I have been working on a small project to map country borders to the information provided by the tz database. I thought it might be quite interesting, as you can effectively enter any co-ordinate points on earth and it will return the time for the given location. Additionally you can enter any country, town, city, street name or zip code and it will give you the time, thanks to those clever guys over at Google. Currently, I've evaluated the accuracy to be 96%, with an accuracy at timezone borders to within 3 miles. Do you think that this is an acceptable starting point for launch? Those last few percent are proving very difficult indeed! I will be continuing this project, as I think it may be useful to someone, somewhere in the future. However, I would appreciate your feedback and input should you have any comments or questions or thoughts at this stage. Many Thanks, Richard

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warning in localtime.c
by Phillip Hellewell Sept. 28, 2007

Sept. 28, 2007

I'm getting this warning in localtime.c on the last line of differ_by_repeat function. This is 2007g code. warning: comparison is always false due to limited range of data type Is this something I should be worried about? Phillip

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Detroit/Cleveland time zones
by Jeff Prucher Sept. 27, 2007

Sept. 27, 2007

Here is some support for Garland's assertion that ``Cleveland and Detroit advanced their clocks one hour in 1914.'' (Well, at least the Cleveland part.) This does suggest that parts of Ohio were in the central time zone before then, and not in North America/New York. >From "The Newark (Ohio) Daily Advocate", June 18, 1914, page 4, column 2: Cleveland and several other Ohio cities have recently changed or planned to change their clocks from Central to Eastern standard time. As every clock will be set one hour ahead, that means that there will be one hour more of day-light after supper or dinner, whichever the evening meal is called. >From "The Ogden (Utah) Standard", June 20, 1914, page 4, column 1 : Cleveland is about to change its clocks from central to eastern standard time, in order to make longer the period after working hours until dark. Jeff Prucher

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Time Zone change in Venezuela (GMT -04:30) will be postponed for 2-3 weeks
by Alex Krivenyshev Sept. 27, 2007

Sept. 27, 2007

Time Zone change in Venezuela (GMT -04:30) will be postponed for 2-3 weeks ... http://opinion.eluniversal.com/2007/08/21/pol_ava_ministro-navarro:- es_21A935917.shtml http://www.worldtimezone.com/dst_news/dst_news_venezuela04.html Alex Krivenyshev, WTZ.com http://www.worldtimezone.com/dst_news/ New York, NY

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El Salvador
by Bobby Rullo Sept. 26, 2007

Sept. 26, 2007

Hello, I have written a timezone library (including a parser) in JavaScript and am running into a bit of confusion with this particular Zone and Rule: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D Rule Salv 1987 1988 - Sep lastSun 0:00 0 S # There are too many San Salvadors elsewhere, so use America/El_Salvador # instead of America/San_Salvador. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador -6:00 Salv C%sT My question is, what is the applicable Rule for any date after 1988? The last "Salv" Rule ends in 1988, and the Zone states that Salv is the Rule from 1921 on (no UNTIL specified) I've done a "man zic" hoping to see something like "If there is no applicable Rule, just use the basic offset and assume that the LETTER is 'S'", but I could not find anything like that. Is that the correct behavior? Thanks Bobby

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5 Indiana counties are going back to Eastern Time zone- no clocks change after Nov 4, 2007
by Alex Krivenyshev Sept. 26, 2007

Sept. 26, 2007

U.S. DOT announced that five Indiana counties (Daviess, Dubois, Knox, Martin and Pike) are moving from Central to Eastern time- keep their clocks unchange after November 4, 2007. http://www.worldtimezone.com/dst_news/dst_news_usa02.html http://www.courierpress.com/news/2007/sep/20/some-counties-get-ok-move-back- eastern-time-zone/ Alex Krivenyshev, WTZ.com http://www.worldtimezone.com/dst_news/ New York, NY

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2000 - end / Anuncios Semana 20070925
by walker_ventas Sept. 25, 2007

Sept. 25, 2007

WALKER INTERNACIONAL S.A. EMAIL walalta(a)enitel.net.ni PH/FX 505-264-2364 RUC 010205-9026 Martes 25 de Septiembre ATENCION GERENTES DE COMPRAS, GERENTES DE INFORMATICA REF: tz(a)elsie.nci.nih.gov WALKER INTERNACIONAL anuncia los siguientes 3 PUNTOS NO. 1 TENEMOS EN PROMOCIN LA RENTA DE EQUIPOS DE INFORMATICA como COMPUTADORAS ( desde $35.00 + IVA x mes ) PORTATILES DATASHOWS IMPRESORAS Y COPIADORAS ( pago x consumo ) Para uso x dia, semana, mes NO. 2 De la misma manera anunciamos que ya estan a la venta nuestros cartuchos LASER PREMIUM Si usted consume 4 de estos cartuchos en un periodo de 12 meses, WALKER le cubrira a usted la garantia de su equipo incluyendo partes necesarias para la reparacion de este, consumibles de desgaste usual, y claro la mano de obra. Su equipo recupera la garantia de fabrica y se cubren las partes de desgaste usual. NO. 3. Ya esta operando EL PULGUERO INFORMATICO. Si necesita vender su computadora impresora o copiadora vieja, nosotros podemos hacerlo x usted a cambio de una comision. LOS EQUIPOS TIENEN QUE ESTAR EN BUEN ESTADO. Entonces llamenos Para mas Informacion Luis Acuna walalta(a)enitel.net.ni

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Venezuelan ground reports?
by Olson, Arthur David (NIH/NCI) [E] Sept. 24, 2007

Sept. 24, 2007

Does anyone have reports from reliable Venezuelan sources on what happened with clocks this weekend? Thanks in advance! --ado

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Brazil changes DST dates again
by Steffen Thorsen Sept. 20, 2007

Sept. 20, 2007

Hello, According to the following announcement by the Brazilian government, Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00: http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F02852… From the article, it seems the same states will observe DST as the previous two years. Best regards, Steffen / timeanddate.com

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Venezuela, Gaza, Iran changes
by Jesper Norgaard Welen Sept. 20, 2007

Sept. 20, 2007

* According to Steffen Thorsen's web site the Gaza Strip and the rest of the Palestinian territories left DST early on 13.th. of September at 2:00 instead of 19.th. of October at 0:00 as tz database has it. If that is true, Palestine therefore just preceded Israel which left DST on 16.th. of September at 2:00. See http://www.timeanddate.com/worldclock/city.html?n=702 * DST News claims that Iran will adopt DST again from 21. March to 23. September (2008?). This goes in hand with the 2006a version of tz data which starts DST in Iran at the same date (2008-03-21), but ends it 21.st. of September 2008. See http://www.worldtimezone.com/dst_news/ * Now several sources have come forward to confirm that Venezuela will change GMT offset from -4 to -4.5 at midnight 23.rd. of September. Unfortunately I have not been able to find anything about this on the official government site. Here are some new links: http://www.tecnogente.info/2007/09/10/huso-horario-para-venezuela/ http://www.enchilame.com/story/chavez-cambia-hora-venezuela http://www.periodistadigital.com/ultima_hora/object.php?o=734021 * Although there are no (English!) authoritative information about it, there are some web sites claiming Japan and South Korea will join a mutual new DST implementation in 2008, presumably at the same dates. Perhaps something could be put in the comments for these countries to document the rumour (SK already has some info on this in 2007g version of asia file). I suggest that the tz database could be updated with (some or all of) the above subjects. At least the Gaza/West Bank change seems urgent since it was already implemented, and Venezuela will change soon. Regards, Jesper Nørgaard Welen Email: jnorgard(a)Prodigy.Net.mx Project Leader (Líder de Proyecto) Software CIMMYT - Centro Internacional de Mejoramiento de Maíz y Trigo Dirección: CIMMYT Int. c/o Jesper Nørgaard Km. 45, Carretera México-Veracruz El Batán Texcoco, Edo. de México CP 56130 MEXICO Tel.: +52 (55) 58-04-20-04 ext. 1374 Fax: +52 (55) 58-04-75-58 Tel. Casa: 53-10-05-95 ó 53-10-97-78 Download the shareware program World Time Explorer, I made: http://www.worldtimeexplorer.com/index.html

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Re: Brazil changes DST dates again
by Debbie Sept. 20, 2007

Sept. 20, 2007

Hello, Once you receive the subscription updates emails they have already been posted for downloads. ; Best Regards, Debbie Reft www.ChaosSoftware.com; www.WorldTimeServer.com ----- Original message ---------------------------------------- From: "Deborah Goldsmith" <goldsmit(a)apple.com> To: tz(a)lecserver.nci.nih.gov Received: 9/20/2007 12:41:24 PM Subject: Re: Brazil changes DST dates again >Are this change and the one for Venezuela likely to show up in a >2007h release soon? >Thanks, >Deborah >On Sep 20, 2007, at 7:02 AM, Steffen Thorsen wrote: >> Hello, >> >> According to the following announcement by the Brazilian >> government, Brazil will start DST on 2007-10-14 00:00 and end on >> 2008-02-17 00:00: >> http://www.mme.gov.br/site/news/ >> detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA? >newsId=13975 >> >> From the article, it seems the same states will observe DST as the >> previous two years. >> >> Best regards, >> Steffen / timeanddate.com >__________ NOD32 2541 (20070920) Information __________ >This message was checked by NOD32 antivirus system. >http://www.eset.com

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Venezuela new time zone- night of September 22-23 2007
by Alex Krivenyshev Sept. 19, 2007

Sept. 19, 2007

...more updated news about timing for Venezuela new time zone rule. Now there is an article that Venezuela plan to use new time zone (GMT -04:30) night of September 22/23 2007 (make sense)- then September 24, 2007. http://www.worldtimezone.com/dst_news/dst_news_venezuela03.html http://www.eltiempo.com.ve/noticias/default.asp?id=124820 Alex Krivenyshev, WTZ.com http://www.worldtimezone.com/dst_news/ New York, NY

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Beginning of the school year- Venezuela new time zone rule (UTC - 04:30) from September 24 2007
by Alex Krivenyshev Sept. 19, 2007

Sept. 19, 2007

Here is an article from official Venezuela Government web site (Radio Nacional de Venezuela) that Venezuela to introduce new time zone rule (UTC - 04:30) from September 24th 2007- which would coincide with the beginning of the school year. http://www.rnv.gov.ve/noticias/index.php?act=ST&f=31&t=53071 http://www.worldtimezone.com/dst_news/dst_news_venezuela02.html Alex Krivenyshev, WTZ.com http://www.worldtimezone.com/dst_news/ New York, NY

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FW: Venezuela timezone change from utc -4 to utc -4:30 Sep 24 2007
by Olson, Arthur David (NIH/NCI) [E] Sept. 18, 2007

Sept. 18, 2007

I'm forwarding this message from Artemis, 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: artemis3 [mailto:artemis3@cantv.net] Sent: Tuesday, September 18, 2007 11:20 To: tz(a)lecserver.nci.nih.gov Subject: Venezuela timezone change from utc -4 to utc -4:30 Sep 24 2007 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello, i'm not quite sure i understand the tzdata file format. I would like to add a rule to reflect this change, so would something like this work? # Venezuela # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Vzla 1964 max - Jan 1 0:00 0:30 S Rule Vzla 2007 max - Sep 24 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Caracas -4:27:44 - LMT 1890 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? -4:30 - VET 1964 # Venezuela Time -4:00 Vzla VET 2007 Sep 23 -4:30 Vzla VET Historically the change from UTC -4:30 to UTC -4 was in January 1964 (not 1965), skipping the very first 30 minutes of that year; how would a rule reflect this? This will end on Sep 23. From September 24 2007 when we are going back to UTC -4:30. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFG7+y7Uzw3EMm5P5wRAl6/AJwOpYCiNVO0y3D65skDtdn8emssIQCdGWRW +eLBB99tjjBZl1ywCGLTvcQ= =2kfj -----END PGP SIGNATURE-----

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