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FW: Update for Asia/Calcutta timezone
by Olson, Arthur David (NIH/NCI) [E] Jan. 9, 2011

Jan. 9, 2011

I'm forwarding this message from Nicholas Alphonso, who is not on the time zone mailing list. Those of you who are on the list, please direct replies appropriately. --ado From: Nicholas Alphonso [mailto:nichalp@gmail.com] Sent: Tuesday, January 04, 2011 12:50 To: tz(a)lecserver.nci.nih.gov Subject: Update for Asia/Calcutta timezone I seek to update the name of the Asia/Calcutta timezone (+0530 UTC). Why Calcutta was chosen in 1970 when Calcutta was India's most most populated city. Since then, • Calcutta has been renamed Kolkata (2001) • Mumbai (formerly Bombay) overtook Calcutta as India's most populous city (1991 census) Note: Time in India is calculated from Mirzapur near the city of Allahabad. I seek to change the name of the timezone to • Asia/Mumbai (based on the most populous city) OR • Asia/New Delhi (capital of India, second most populated, more centrally located) Regards, Nicholas

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Update for Asia/Calcutta timezone
by Nicholas Alphonso Jan. 4, 2011

Jan. 4, 2011

I seek to update the name of the Asia/Calcutta timezone (+0530 UTC). Why Calcutta was chosen in 1970 when Calcutta was India's most most populated city. Since then, - Calcutta has been renamed Kolkata (2001) - Mumbai (formerly Bombay) overtook Calcutta as India's most populous city (1991 census) Note: Time in India is calculated from Mirzapur near the city of Allahabad. I seek to change the name of the timezone to - Asia/Mumbai (based on the most populous city) OR - Asia/New Delhi (capital of India, second most populated, more centrally located) Regards, Nicholas

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Re: Future time zone home
by SM Dec. 20, 2010

Dec. 20, 2010

At 06:11 21-10-10, Olson, Arthur David (NIH/NCI) [E] wrote: >In response to the need to find a new time zone home before I'm >eligible to retire in 2012, Eliot Lear and Paul Eggert have authored >the draft document "IANA Procedures for Maintaining the Timezone >Database" now available from the Internet Engineering Task Force >(IETF) web site: As the intended status of the document is BCP, I'll comment on it from that angle. In Section 1: "Those registries are coordinated by technical experts who are designated by the Internet Engineering Steering Group (IESG)." For what it's worth, some of these registries might not fall under the IESG. In Section 2: 'This list membership will be transitioned to the IETF mail server. The TZ coordinator will continue to manage the list, in accordance with rules of governance for non-WG mailing lists (including, for example, the commonly used "Note Well" statement).' Will the contributions fall under "Note Well" rules? In Section 4: "From time to time it will be necessary to replace a TZ Coordinator. This could occur for a number of reasons:" I suggest "appoint" instead of "replace". "The IESG MUST use rough consensus of the TZ mailing list as their primary guide to further action, when it exists." As the document is a BCP, these requirement could be changed in future. In Section 5: "No change shall be made to the license without consultation and rough consensus of the community." The document uses "rough consensus" instead of consensus". The barrier is lower for the former. The above text mentioned "community". Is that the TZ community? In Section 6: "It is the understanding of the IESG, ISOC, and IANA that the database itself is public domain." I suggest replacing "IESG" with "IETF" as the IESG operates within the IETF. "Should claims be made and substantiated against the database, the IANA will act in accordance with all competent court orders." I suggest putting code distribution under the IETF so that the legal aspect falls under the IETF Trust. The following sentence could then be removed: "Should claims be made and substantiated against the database, the IANA will act in accordance with all competent court orders." I suggest removing "further" from the following sentence: "No further ownership claims will be made by IANA, the IETF Trust, or ISOC on the database." In Section 7: "The IANA will see that the role of TZ Coordinator is filled, based on the procedures described above." According to Section 4, it is the IESG that does that. There is a MoU between IANA and the IETF for IETF protocols. There has been various interpretations of that MoU. An alternative to avoid non-technical concerns is to place the distribution of the database under the RFC Editor and explore having the material with a status similar to the Independent Submission Stream. I am not suggesting a license change. The following text is an adaption from RFC 4846: To the extent that a TZ Contribution or any portion thereof is protected by copyright and other rights of authorship, the Contributor, and each named co-Contributor, and the organization he or she represents or is sponsored by (if any) grant an irrevocable, non-exclusive, royalty-free, world-wide right and license to the IETF Trust and the IETF under all intellectual property rights in the TZ Contribution in perpetuity, to copy, publish, display, and distribute the TZ Contribution. The Contributor, each named co-Contributor, and the organizations represented above irrevocably and in perpetuity grant the rights listed below to the Internet Community: A. to prepare or allow the preparation of translations of the TZ database into languages other than English, B to prepare derivative works (other than translations) that are based on or incorporate all or part of the TZ Contribution, or comment upon it. The license to such derivative works shall not grant the IETF Trust, the IETF, or other party preparing a derivative work any more rights than the license to the original TZ Contribution, and C. to reproduce any trademarks, service marks, or trade names that are included in the TZ Contribution solely in connection with the reproduction, distribution, or publication of the TZ Contribution and derivative works. At 09:09 21-10-10, Tony Finch wrote: >Apart from three files, the current tzcode distribution is public domain. >There is no single BSD licence so this statement is ambiguous. In fact the >licence on the three special files is more like a MIT licence. Yes. Regards, -sm

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FW: Test cases for zoneinfo data
by Olson, Arthur David (NIH/NCI) [E] Dec. 16, 2010

Dec. 16, 2010

I'm forwarding this message from Christopher Hunt, who is not on the time zone mailing list. Those of you who are on the list, please direct replies appropriately. --ado -----Original Message----- From: Christopher Hunt [mailto:huntc@internode.on.net] Sent: Thursday, December 16, 2010 6:36 To: yoshito_umaoka(a)us.ibm.com Cc: tz(a)lecserver.nci.nih.gov; 'tz(a)elsie.nci.nih.gov' Subject: Re: Test cases for zoneinfo data Firstly, thanks for the responses. My responses are inline below. >> I'm creating a set of Java classes that closely reflect the structure >> of > the >> Zoneinfo database. My requirement is driven mostly by wanting to >> dynamically update Java TimeZone classes i.e. as opposed to compiling >> a zoneinfo data and re-starting my application. > > You probably want to look into JSR-310. TZDBZoneRulesCompiler in > JSR-310 creates ZoneRules from the tz database source files. Ah - I certainly didn't know about this so thanks for the "heads-up". At first glance though, I don't see that Zoneinfo's structures are being faithfully reproduced here. I suppose another motivation for me was to stick to the Zoneinfo structure given that it is highly evolved and flexible. Please see the attached class diagram of what I'm working to and do feel free to voice your opinion. ZoneinfoTimeZone is a JDK compatible TimeZone facade whereas the rest are intended to represent Zoneinfo structures in an object oriented manner.

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Future time zone home
by Olson, Arthur David (NIH/NCI) [E] Dec. 16, 2010

Dec. 16, 2010

In response to the need to find a new time zone home before I'm eligible to retire in 2012, Eliot Lear and Paul Eggert have authored the draft document "IANA Procedures for Maintaining the Timezone Database" now available from the Internet Engineering Task Force (IETF) web site: http://tools.ietf.org/html/draft-lear-iana-timezone-database-00 Comments on how the draft can be improved are welcome. Also welcome: feedback on whether the proposed approach meets the needs of folks on the time zone mailing list--the proposed approach can't and won't go forward without support from the time zone community. The document includes electronic mail addresses for Eliot and Paul; general comments can also be sent to the time zone mailing list. --ado

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Test cases for zoneinfo data
by Christopher Hunt Dec. 16, 2010

Dec. 16, 2010

Hi there, I'm creating a set of Java classes that closely reflect the structure of the Zoneinfo database. My requirement is driven mostly by wanting to dynamically update Java TimeZone classes i.e. as opposed to compiling a zoneinfo data and re-starting my application. In addition I feel that the ICU and Sun classes do not accurately reflect Zoneinfo structures. I shall open-source this project once it gets to a working point. It'd be terribly helpful if I could get hold of some test cases, automated or otherwise, that verify correct time zone calculations. Would anyone out there have such things? Kind regards, Christopher

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time zone database open questions
by Arthur David Olson Dec. 9, 2010

Dec. 9, 2010

Here are the open time zone database questions I know of. Are the others? 1. Did all of Mexico's Baja California Norte use United States DST rules in 2010, or did only border areas use U.S. DST? What of other Mexican states on the U.S. border? 2. How was DST handled in the West Bank and in Gaza in 2010? How was it handled in previous years? 3. What's the accurate history of the change to use of Shanghai/Beijing time in China? 4. Is there an acceptable way of handling present-day dual timekeeping in Xinjiang, China without either losing track of past practices? 5. Did Windsor and other parts of Ontario, Canada use different DST rules in the past? (See Mark Brader's communication at the end of this message.) --ado # From Mark Brader (2010-03-06): # ... # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom # right corner of page 1, it says that Toronto will return to standard # time at 2 am Sunday morning (which agrees with the database), and that: # # The one-hour setback will go into effect throughout most of Ontario, # except in areas like Windsor which remains on standard time all year. # # Windsor is, of course, a lot larger than Nipigon. # # I only came across this incidentally. I don't know if Windsor began # observing DST when Detroit did, or in 1974, or on some other date. # # By the way, the article continues by noting that: # # Some cities in the United States have pushed the deadline back # three weeks and will change over from daylight saving in October.

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update tz-link.htm to add mkdir tz and cd tz like in README
by Gilles Espinasse Dec. 6, 2010

Dec. 6, 2010

I just followed the instructions in tz-link.htm before to see there is no top directory in tz*.tar.gz To avoid that same mistake for others, please find a patch that update tz-link.htm to have the same instructions than in README ( with mkdir tz and cd tz before wget) Gilles

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2nd reading of "Daylight Saving Bill 2010-11" in UK Parliament
by Philip.Pizzey＠sita.aero Dec. 1, 2010

Dec. 1, 2010

Hi there, you may already be aware of this but today's BBC Radio 4 programme "You and Yours" contained a feature about Rebecca Harris MP's Private Members Bill in the UK Parliament. The Bill is entitled "Daylight Saving Bill 2010-11" and proposes "The Bill would require the Government to conduct a cross-departmental analysis of the potential costs and benefits of advancing time by one hour for all, or part of, the year.". The Bill is due for it's second reading in the House of Commons on 3rd December 2010. Here is a link to the You and Yours homepage which does not at this time mention the feature: http://www.bbc.co.uk/radio4/features/you-and-yours and a link to the bill itself: http://services.parliament.uk/bills/2010-11/daylightsaving.html Cheers, Phil. This document is strictly confidential and intended only for use by the addressee unless otherwise stated. If you are not the intended recipient, please notify the sender immediately and delete it from your system.

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FW: stack overflow in tzload
by Olson, Arthur David (NIH/NCI) [E] Nov. 26, 2010

Nov. 26, 2010

I'm forwarding this message from Ted Unangst, who is not on the time zone mailing list. Those of you who are on the list, please direct replies appropriately. --ado -----Original Message----- From: Ted Unangst [mailto:ted.unangst@gmail.com] Sent: Monday, November 22, 2010 6:22 To: tz(a)lecserver.nci.nih.gov Subject: stack overflow in tzload Stack overflow as in there's not enough stack. I ran into this problem running a program on openbsd that was using a fairly small thread size. I switched to using malloc. Index: localtime.c =================================================================== RCS file: /home/tedu/cvs/src/lib/libc/time/localtime.c,v retrieving revision 1.35 diff -u -r1.35 localtime.c --- localtime.c 23 Aug 2010 22:35:34 -0000 1.35 +++ localtime.c 20 Nov 2010 23:32:09 -0000 @@ -340,7 +340,7 @@ char buf[2 * sizeof(struct tzhead) + 2 * sizeof *sp + 4 * TZ_MAX_TIMES]; - } u; + } *u; sp->goback = sp->goahead = FALSE; if (name != NULL && issetugid() != 0) @@ -383,28 +383,33 @@ if ((fid = open(name, OPEN_MODE)) == -1) return -1; } - nread = read(fid, u.buf, sizeof u.buf); - if (close(fid) < 0 || nread <= 0) + u = malloc(sizeof(*u)); + if (!u) { + close(fid); return -1; + } + nread = read(fid, u->buf, sizeof u->buf); + if (close(fid) < 0 || nread <= 0) + goto bad; for (stored = 4; stored <= 8; stored *= 2) { int ttisstdcnt; int ttisgmtcnt; - ttisstdcnt = (int) detzcode(u.tzhead.tzh_ttisstdcnt); - ttisgmtcnt = (int) detzcode(u.tzhead.tzh_ttisgmtcnt); - sp->leapcnt = (int) detzcode(u.tzhead.tzh_leapcnt); - sp->timecnt = (int) detzcode(u.tzhead.tzh_timecnt); - sp->typecnt = (int) detzcode(u.tzhead.tzh_typecnt); - sp->charcnt = (int) detzcode(u.tzhead.tzh_charcnt); - p = u.tzhead.tzh_charcnt + sizeof u.tzhead.tzh_charcnt; + ttisstdcnt = (int) detzcode(u->tzhead.tzh_ttisstdcnt); + ttisgmtcnt = (int) detzcode(u->tzhead.tzh_ttisgmtcnt); + sp->leapcnt = (int) detzcode(u->tzhead.tzh_leapcnt); + sp->timecnt = (int) detzcode(u->tzhead.tzh_timecnt); + sp->typecnt = (int) detzcode(u->tzhead.tzh_typecnt); + sp->charcnt = (int) detzcode(u->tzhead.tzh_charcnt); + p = u->tzhead.tzh_charcnt + sizeof u->tzhead.tzh_charcnt; if (sp->leapcnt < 0 || sp->leapcnt > TZ_MAX_LEAPS || sp->typecnt <= 0 || sp->typecnt > TZ_MAX_TYPES || sp->timecnt < 0 || sp->timecnt > TZ_MAX_TIMES || sp->charcnt < 0 || sp->charcnt > TZ_MAX_CHARS || (ttisstdcnt != sp->typecnt && ttisstdcnt != 0) || (ttisgmtcnt != sp->typecnt && ttisgmtcnt != 0)) - return -1; - if (nread - (p - u.buf) < + goto bad; + if (nread - (p - u->buf) < sp->timecnt * stored + /* ats */ sp->timecnt + /* types */ sp->typecnt * 6 + /* ttinfos */ @@ -412,7 +417,7 @@ sp->leapcnt * (stored + 4) + /* lsinfos */ ttisstdcnt + /* ttisstds */ ttisgmtcnt) /* ttisgmts */ - return -1; + goto bad; for (i = 0; i < sp->timecnt; ++i) { sp->ats[i] = (stored == 4) ? detzcode(p) : detzcode64(p); @@ -421,7 +426,7 @@ for (i = 0; i < sp->timecnt; ++i) { sp->types[i] = (unsigned char) *p++; if (sp->types[i] >= sp->typecnt) - return -1; + goto bad; } for (i = 0; i < sp->typecnt; ++i) { register struct ttinfo * ttisp; @@ -431,11 +436,11 @@ p += 4; ttisp->tt_isdst = (unsigned char) *p++; if (ttisp->tt_isdst != 0 && ttisp->tt_isdst != 1) - return -1; + goto bad; ttisp->tt_abbrind = (unsigned char) *p++; if (ttisp->tt_abbrind < 0 || ttisp->tt_abbrind > sp->charcnt) - return -1; + goto bad; } for (i = 0; i < sp->charcnt; ++i) sp->chars[i] = *p++; @@ -460,7 +465,7 @@ ttisp->tt_ttisstd = *p++; if (ttisp->tt_ttisstd != TRUE && ttisp->tt_ttisstd != FALSE) - return -1; + goto bad; } } for (i = 0; i < sp->typecnt; ++i) { @@ -473,7 +478,7 @@ ttisp->tt_ttisgmt = *p++; if (ttisp->tt_ttisgmt != TRUE && ttisp->tt_ttisgmt != FALSE) - return -1; + goto bad; } } /* @@ -506,11 +511,11 @@ /* ** If this is an old file, we're done. */ - if (u.tzhead.tzh_version[0] == '\0') + if (u->tzhead.tzh_version[0] == '\0') break; - nread -= p - u.buf; + nread -= p - u->buf; for (i = 0; i < nread; ++i) - u.buf[i] = p[i]; + u->buf[i] = p[i]; /* ** If this is a narrow integer time_t system, we're done. */ @@ -518,13 +523,13 @@ break; } if (doextend && nread > 2 && - u.buf[0] == '\n' && u.buf[nread - 1] == '\n' && + u->buf[0] == '\n' && u->buf[nread - 1] == '\n' && sp->typecnt + 2 <= TZ_MAX_TYPES) { struct state ts; register int result; - u.buf[nread - 1] = '\0'; - result = tzparse(&u.buf[1], &ts, FALSE); + u->buf[nread - 1] = '\0'; + result = tzparse(&u->buf[1], &ts, FALSE); if (result == 0 && ts.typecnt == 2 && sp->charcnt + ts.charcnt <= TZ_MAX_CHARS) { for (i = 0; i < 2; ++i) @@ -568,7 +573,11 @@ break; } } + free(u); return 0; +bad: + free(u); + return -1; } static int

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