- tz - lists.iana.org

Re: [tz] LST
by Robert Elz Oct. 15, 2011

Oct. 15, 2011

Date: Fri, 14 Oct 2011 10:10:31 -0400 From: Tim Parenti <tim(a)timtimeonline.com> Message-ID: <CAFpi07yBJVqZxgFSzqOoKTLPb2m67NiH_LPCBifGT3J8hMrzsw(a)mail.gmail.com> | "LST" seems too like the other "meaningful" identifiers that people may try | to continue to infer meaning from it. And ... Jaakko Hyvätti <jaakko.hyvatti(a)foreca.com> said: | LOC or LOCAL would be least confusing I think. A couple of other suggestions I have been sent off list: LCT (Local Clock Time) which has the advantages of LST (most of the advantages I like in that one, but without the name clash - which personally I see as a deficit of LCT!) NIL or nil as an alternative for NONE or none while remaining 3 characters long (which is a minor advantage, but we already have zones with longer abbreviations, so ...) These are thrown into the pot for consideration. There is no current urgency to come to a conclusion on this that I'm aware of, so we can treat it as a back-burner topic. But please everyone, keep in mind that debating names is easy, everyone can have an opinion, as there's usually no right answer (sometimes some wrong answers, but not often one obviously right answer). kre

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Re: [tz] LST
by Tim Parenti Oct. 14, 2011

Oct. 14, 2011

On Thu, Oct 13, 2011 at 23:29, Robert Elz <kre(a)munnari.oz.au> wrote: > | Forgive me if I'm wrong, but I believe most robust implementations of > the TZ > | database already have some way of expressing an offset in this way. > > That isn't the issue. What is of interest for this topic, is what the > tz database (and code) should put in the tzname[] array &/or tm_zone field > of the struct tm. > ... > > So, using -04:00 just isn't an option, sorry. > That was precisely my point. While a numeric offset would be meaningful, it's place is simply *not* in the abbreviation designation, for programmatic and practical reasons. On Fri, Oct 14, 2011 at 06:29, Zefram <zefram(a)fysh.org> wrote: > FWIW, the POSIX standard for $TZ allows ASCII letters (of either case), > digits, "+", and "-" in the abbreviation, and requires the abbreviation > to be at least three characters long. > "LST" seems too like the other "meaningful" identifiers that people may try to continue to infer meaning from it. Could we perhaps just use the string "local" for these "non-meaningful" cases, and avoid abbreviations altogether? This all-lowercase string conforms to the POSIX standard as described and would also serve to *clearly* disambiguate from other identifiers like "UTC", while not having to deal with contrived abbreviations. -- Tim Parenti

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mktime() during the the DST gap
by christos＠zoulas.com Oct. 14, 2011

Oct. 14, 2011

I am sure that this has been discussed before, but I think that if we decide to keep the current behavior, we should document it in the manual page explicitly. As you probably know calling mktime() in during the DST gap with tm_isdst == -1, returns -1 in this tzcode() implementation. The glibc one at least, adds the difference between the non-DST and the DST time. Both behaviors are justifyable. - We are returning -1 because this time cannot be represented. - We are returning the time you meant, since you cannot easily fix it by yourself by deducing the dst offset. I am suggesting that we explicitly document the chosen behavior in the manual page and if we choose to return -1, we set errno which is currently not set. I have appended a patch that changes the behavior to return the closest time as glibc does (if we choose to do that) as well as a test program that demonstrates that mktime() fails and does not set errno now. christos ------------- #include <stdio.h> #include <unistd.h> #include <err.h> #include <time.h> int main(int argc, char *argv[]) { struct tm tm; time_t t; setenv("TZ", "America/New_York"); memset(&tm, 0, sizeof(tm)); tm.tm_hour = 2; tm.tm_min = 30; tm.tm_mday = 14; tm.tm_mon = 2; tm.tm_year = 110; tm.tm_isdst = -1; t = mktime(&tm); if (t == -1) err(1, "mktime"); printf("%s", ctime(&t)); return 0; } ------------------- diff -u -r1.8 localtime.c --- localtime.c 14 Dec 2010 19:08:54 -0000 1.8 +++ localtime.c 14 Oct 2011 15:17:58 -0000 @@ -1787,6 +1787,25 @@ return WRONG; --hi; } + if (lo - 1 == hi && yourtm.tm_isdst < 0) { + time_t off = 0; + for (i = sp->typecnt - 1; i >= 0; --i) { + for (j = sp->typecnt - 1; j >= 0; --j) { + if (sp->ttis[j].tt_isdst == + sp->ttis[i].tt_isdst) + continue; + off = sp->ttis[j].tt_gmtoff - + sp->ttis[i].tt_gmtoff; + break; + } + if (j >= 0) + break; + } + if (off) { + t = hi + off; + break; + } + } if (lo > hi) return WRONG; if (dir > 0)

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A history maintaining repository for tzdata
by Kevin Lyda Oct. 14, 2011

Oct. 14, 2011

I note that some others have created some repositories for tzdata, but I'd really like to see the history of what Paul and Arthur have done be maintained. Commits that have useful commit messages and "correct" dates. To that end I've created the following repository (I stuck it on two hosters as I saw there were concerns about github on the list): https://github.com/lyda/tzdata https://gitorious.org/tzdata The README file explains how the import was done and what might need to be fixed: https://github.com/lyda/tzdata/blob/master/README https://gitorious.org/tzdata/tzdata/blobs/master/README If people want me to recreate it differently I'm happy to do so. It takes about a minute to build from scratch. The git repo is only 1.5M BTW so if someone wants to setup private hosting it really won't take up much room or bandwidth. If people like this I'm happy to do the same for tzcode. Kevin PS It would amuse me if the tz project had one of the oldest git commits on github/gitorious/wherever: https://github.com/lyda/tzdata/commit/dcf9a59f640d3e24745b36a9b5593add336a0… -- Kevin Lyda Dublin, Ireland US Citizen overseas? We can vote. Register now: http://www.votefromabroad.org/

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archive completeness
by Zefram Oct. 14, 2011

Oct. 14, 2011

For the benefit of those looking to complete the oldtz archive, I've checked the entire mailing list archive for release announcements. I used <http://mm.icann.org/pipermail/tz/> for 1986 to 2010, and <http://news.gmane.org/gmane.comp.time.tz> for 2011. In this combination I believe they're a complete archive of the mailing lists, <tz(a)elsie.nci.nih.gov> and <tz(a)iana.org>, from inception on 1986-11-25 up to the present 2011-10-11. I extracted all the information from the archives today, 2011-10-11. I have some confidence that this is a complete list of the announcements on the mailing lists, because I grepped specifically for ones that seemed to be missing. (Did find a few that I'd missed on the first pass.) There are, however, some releases that were not announced, ranging from tz92b up to tzdata2011f. There are various other irregularities. This listing incorporates corrections that were made on the list, and obvious typo fixes. The dates given are the UT date of the announcement message (the original one, if later corrected) as reported by the archive. All announcements up to 2011k were by Arthur David Olson. I'd like to see someone expand this into a systematic list of all releases actually made. The mailing list contains a few mentions of releases that were not announced at the time, but I have no confidence that this would catch all unannounced releases. 1992-04-25 tz92.tar.Z only 1992-11-21 tz92c.tar.Z only 1993-01-08 tzcode93.tar.Z tzdata93.tar.Z 1993-02-02 tzdata93b.tar.Z only 1993-06-06 tzcode93c.tar.Z tzdata93c.tar.Z 1993-07-18 tzcode93d.tar.Z tzdata93d.tar.Z 1993-09-06 tzcode93e.tar.Z tzdata93e.tar.Z 1993-10-15 tzcode93f.tar.Z tzdata93f.tar.Z 1993-11-29 tzcode93g.tar.gz tzdata93g.tar.gz 1994-02-03 tzdata94a.tar.gz only 1994-02-07 tzcode94b.tar.gz tzdata94b.tar.gz 1994-02-10 tzcode94c.tar.gz only 1994-02-24 tzcode94d.tar.gz tzdata94d.tar.gz 1994-03-31 tzcode94e.tar.gz only 1994-05-05 tzcode94f.tar.gz only 1994-05-05 tzcode94g.tar.gz only 1994-07-04 tzdata94e.tar.gz only 1994-08-20 tzdata94f.tar.gz only 1994-12-10 tzcode94h.tar.gz tzdata94h.tar.gz 1995-03-11 tzcode95b.tar.gz tzdata95b.tar.gz 1995-03-13 tzcode95c.tar.gz only 1995-07-02 tzdata95c.tar.gz only 1995-07-03 tzdata95d.tar.gz only 1995-07-08 tzdata95e.tar.gz only 1995-08-29 tzdata95f.tar.gz only 1995-09-01 tzdata95g.tar.gz only 1995-09-14 tzcode95d.tar.gz only 1995-09-21 tzdata95h.tar.gz only 1995-09-26 tzdata95i.tar.gz only 1995-10-13 tzcode95e.tar.gz only 1995-10-28 tzcode95f.tar.gz tzdata95j.tar.gz 1995-10-30 tzcode95g.tar.gz tzdata95k.tar.gz 1995-12-19 tzcode95h.tar.gz tzdata95l.tar.gz 1995-12-21 tzcode95i.tar.gz tzdata95m.tar.gz 1996-01-06 tzcode96a.tar.gz tzdata96a.tar.gz 1996-01-11 tzcode96b.tar.gz only 1996-01-16 tzcode96c.tar.gz only 1996-01-27 tzdata96b.tar.gz only 1996-02-12 tzcode96d.tar.gz tzdata96c.tar.gz 1996-02-29 tzcode96e.tar.gz only 1996-03-19 tzdata96d.tar.gz only 1996-03-19 tzdata96e.tar.gz only 1996-04-19 tzdata96f.tar.gz only 1996-05-03 tzcode96f.tar.gz tzdata96g.tar.gz 1996-05-09 tzdata96h.tar.gz only 1996-05-16 tzcode96g.tar.gz only 1996-06-05 tzcode96h.tar.gz only 1996-07-01 tzdata96i.tar.gz only 1996-07-28 tzcode96i.tar.gz only 1996-07-30 tzcode96j.tar.gz only 1996-09-08 tzcode96k.tar.gz tzdata96k.tar.gz 1996-09-08 tzcode96l.tar.gz only 1996-11-05 tzcode1996m.tar.gz tzdata1996l.tar.gz 1996-11-24 tzdata1996m.tar.gz only 1996-12-16 tzcode1996n.tar.gz only 1996-12-28 tzcode1996o.tar.gz tzdata1996n.tar.gz 1997-01-21 tzcode1997a.tar.gz tzdata1997a.tar.gz 1997-02-27 tzcode1997b.tar.gz tzdata1997b.tar.gz 1997-03-04 tzdata1997c.tar.gz only 1997-03-08 tzcode1997c.tar.gz tzdata1997d.tar.gz 1997-03-29 tzcode1997d.tar.gz tzdata1997e.tar.gz 1997-05-03 tzcode1997e.tar.gz tzdata1997f.tar.gz 1997-07-19 tzcode1997f.tar.gz tzdata1997g.tar.gz 1997-09-04 tzcode1997g.tar.gz tzdata1997h.tar.gz 1997-10-07 tzdata1997i.tar.gz only 1997-12-18 tzcode1997h.tar.gz tzdata1997j.tar.gz 1997-12-29 tzcode1997i.tar.gz tzdata1997k.tar.gz 1998-01-13 tzcode1998a.tar.gz tzdata1998a.tar.gz 1998-01-17 tzcode1998b.tar.gz tzdata1998b.tar.gz 1998-02-28 tzcode1998c.tar.gz tzcode1998c.tar.gz 1998-05-14 tzcode1998d.tar.gz tzdata1998d.tar.gz 1998-05-28 tzcode1998e.tar.gz tzdata1998e.tar.gz 1998-06-01 tzcode1998f.tar.gz only 1998-07-20 tzdata1998f.tar.gz only 1998-08-11 tzdata1998g.tar.gz only 1998-09-24 tzcode1998g.tar.gz tzdata1998h.tar.gz 1998-10-01 tzcode1998h.tar.gz tzdata1998i.tar.gz 1999-01-19 tzcode1999a.tar.gz tzdata1999a.tar.gz 1999-02-01 tzcode1999b.tar.gz tzdata1999b.tar.gz 1999-03-25 tzcode1999c.tar.gz tzdata1999c.tar.gz 1999-03-30 tzcode1999d.tar.gz tzdata1999d.tar.gz 1999-08-17 tzcode1999e.tar.gz tzdata1999e.tar.gz 1999-09-23 tzcode1999f.tar.gz tzdata1999f.tar.gz 1999-09-28 tzcode1999g.tar.gz tzdata1999g.tar.gz 1999-10-07 tzdata1999h.tar.gz only 1999-11-08 tzcode1999h.tar.gz tzdata1999i.tar.gz 1999-11-16 tzcode1999i.tar.gz tzdata1999j.tar.gz 2000-01-18 tzcode2000a.tar.gz tzdata2000a.tar.gz 2000-02-21 tzcode2000b.tar.gz tzdata2000b.tar.gz 2000-03-04 tzcode2000c.tar.gz tzdata2000c.tar.gz 2000-03-14 tzdata2000d.tar.gz only 2000-04-20 tzcode2000d.tar.gz only 2000-07-31 tzcode2000e.tar.gz tzdata2000e.tar.gz 2000-08-10 tzcode2000f.tar.gz tzdata2000f.tar.gz 2000-10-10 tzcode2000g.tar.gz tzdata2000g.tar.gz 2000-12-14 tzcode2000h.tar.gz tzdata2000h.tar.gz 2001-03-13 tzcode2001a.tar.gz tzdata2001a.tar.gz 2001-04-05 tzcode2001b.tar.gz tzdata2001b.tar.gz 2001-06-05 tzcode2001c.tar.gz tzdata2001c.tar.gz 2001-10-09 tzcode2001d.tar.gz tzdata2001d.tar.gz 2002-01-28 tzcode2002a.tar tzdata2002a.tar 2002-01-28 tzcode2002b.tar.gz tzdata2002b.tar.gz 2002-04-04 tzcode2002c.tar.gz tzdata2002c.tar.gz 2002-10-15 tzcode2002d.tar.gz tzdata2002d.tar.gz 2003-03-24 tzcode2003a.tar.gz tzdata2003a.tar.gz 2003-09-16 tzcode2003b.tar.gz tzdata2003b.tar.gz 2003-09-16 tzcode2003c.tar.gz tzdata2003c.tar.gz 2003-10-06 tzcode2003d.tar.gz tzdata2003d.tar.gz 2003-12-15 tzcode2003e.tar.gz tzdata2003e.tar.gz 2004-05-27 tzcode2004a.tar.gz tzdata2004a.tar.gz 2004-07-19 tzcode2004b.tar.gz tzdata2004b.tar.gz 2004-08-11 tzcode2004c.tar.gz only 2004-09-22 tzdata2004d.tar.gz only 2004-09-13 tzcode2004d.tar.gz only 2004-10-11 tzcode2004e.tar.gz tzdata2004e.tar.gz 2004-10-21 tzcode2004f.tar.gz only 2004-11-02 tzcode2004g.tar.gz tzdata2004g.tar.gz 2004-12-07 tzcode2004h.tar.gz only 2004-12-14 tzcode2004i.tar.gz only 2005-01-01 tzcode2005a.tar.gz tzdata2005a.tar.gz 2005-01-10 tzcode2005b.tar.gz tzdata2005b.tar.gz 2005-01-17 tzcode2005c.tar.gz tzdata2005c.tar.gz 2005-01-31 tzcode2005d.tar.gz only 2005-02-10 tzcode2005e.tar.gz tzdata2005e.tar.gz 2005-03-01 tzcode2005f.tar.gz tzdata2005f.tar.gz 2005-03-14 tzcode2005g.tar.gz tzdata2005g.tar.gz 2005-04-04 tzcode2005h.tar.gz tzdata2005h.tar.gz 2005-04-21 tzdata2005i.tar.gz only 2005-06-13 tzcode2005j.tar.gz tzdata2005j.tar.gz 2005-07-14 tzcode2005k.tar.gz tzdata2005k.tar.gz 2005-08-22 tzcode2005l.tar.gz tzdata2005l.tar.gz 2005-08-29 tzcode2005m.tar.gz tzdata2005m.tar.gz 2005-10-03 tzcode2005n.tar.gz tzdata2005n.tar.gz 2005-11-28 tzcode2005o.tar.gz tzdata2005o.tar.gz 2005-12-05 tzcode2005p.tar.gz tzdata2005p.tar.gz 2005-12-13 tzcode2005q.tar.gz tzdata2005q.tar.gz 2005-12-27 tzcode2005r.tar.gz tzdata2005r.tar.gz 2006-01-30 tzcode2006a.tar.gz tzdata2006a.tar.gz 2006-02-20 tzdata2006b.tar.gz tz32code2006b.tar.gz tz64code2006b.tar.gz 2006-04-03 tzcode2006c.tar.gz tzdata2006c.tar.gz 2006-04-17 tzcode2006d.tar.gz tzdata2006d.tar.gz 2006-05-01 tzcode2006e.tar.gz tzdata2006e.tar.gz 2006-05-01 tzcode2006f.tar.gz tzdata2006f.tar.gz 2006-05-08 tzcode2006g.tar.gz tzdata2006g.tar.gz 2006-07-24 tzcode2006h.tar.gz only 2006-08-07 tzcode2006i.tar.gz only 2006-08-21 tzcode2006j.tar.gz tzdata2006j.tar.gz 2006-08-28 tzcode2006k.tar.gz tzdata2006k.tar.gz 2006-09-18 tzdata2006l.tar.gz only 2006-10-02 tzcode2006m.tar.gz tzdata2006m.tar.gz 2006-10-10 tzcode2006n.tar.gz tzdata2006n.tar.gz 2006-11-06 tzcode2006o.tar.gz tzdata2006o.tar.gz 2006-11-27 tzcode2006p.tar.gz tzdata2006p.tar.gz 2007-01-08 tzcode2007a.tar.gz tzdata2007a.tar.gz 2007-02-12 tzcode2007b.tar.gz tzdata2007b.tar.gz 2007-02-26 tzcode2007c.tar.gz tzdata2007c.tar.gz 2007-03-20 tzcode2007d.tar.gz tzdata2007d.tar.gz 2007-04-02 tzcode2007e.tar.gz tzdata2007e.tar.gz 2007-05-07 tzcode2007f.tar.gz tzdata2007f.tar.gz 2007-08-20 tzcode2007g.tar.gz tzdata2007g.tar.gz 2007-10-01 tzcode2007h.tar.gz tzdata2007h.tar.gz 2007-11-01 tzdata2007i.tar.gz only 2007-12-03 tzcode2007j.tar.gz tzdata2007j.tar.gz 2007-12-31 tzcode2007k.tar.gz tzdata2007k.tar.gz 2008-03-08 tzcode2008a.tar.gz tzdata2008a.tar.gz 2008-03-24 tzdata2008b.tar.gz only 2008-05-27 tzdata2008c.tar.gz only 2008-07-07 tzdata2008d.tar.gz only 2008-07-28 tzcode2008e.tar.gz tzdata2008e.tar.gz 2008-09-15 tzdata2008f.tar.gz only 2008-10-06 tzcode2008g.tar.gz tzdata2008g.tar.gz 2008-10-13 tzcode2008h.tar.gz tzdata2008h.tar.gz 2008-10-27 tzdata2008i.tar.gz only 2009-01-21 tzcode2009a.tar.gz tzdata2009a.tar.gz 2009-02-09 tzcode2009b.tar.gz tzdata2009b.tar.gz 2009-03-16 tzdata2009c.tar.gz only 2009-03-23 tzcode2009d.tar.gz tzdata2009d.tar.gz 2009-04-06 tzcode2009e.tar.gz tzdata2009e.tar.gz 2009-04-13 tzdata2009f.tar.gz only 2009-04-27 tzdata2009g.tar.gz only 2009-05-26 tzcode2009h.tar.gz tzdata2009h.tar.gz 2009-07-08 tzcode2009i.tar.gz tzdata2009i.tar.gz 2009-07-18 tzdata2009j.tar.gz only 2009-07-20 tzcode2009k.tar.gz tzdata2009k.tar.gz 2009-08-17 tzdata2009l.tar.gz only 2009-09-08 tzdata2009m.tar.gz only 2009-09-28 tzdata2009n.tar.gz only 2009-10-19 tzdata2009o.tar.gz only 2009-10-26 tzdata2009p.tar.gz only 2009-11-02 tzcode2009q.tar.gz tzdata2009q.tar.gz 2009-11-09 tzcode2009r.tar.gz tzdata2009r.tar.gz 2009-11-16 tzdata2009s.tar.gz only 2009-12-21 tzcode2009t.tar.gz tzdata2009t.tar.gz 2009-12-28 tzdata2009u.tar.gz only 2010-01-18 tzdata2010a.tar.gz only 2010-01-25 tzdata2010b.tar.gz only 2010-02-16 tzcode2010a.tar.gz only 2010-03-01 tzcode2010c.tar.gz tzdata2010c.tar.gz 2010-03-08 tzdata2010d.tar.gz only 2010-03-08 tzdata2010e.tar.gz only 2010-03-22 tzcode2010f.tar.gz tzdata2010f.tar.gz 2010-03-29 tzdata2010g.tar.gz only 2010-04-05 tzdata2010h.tar.gz only 2010-04-19 tzdata2010i.tar.gz only 2010-05-10 tzcode2010j.tar.gz tzdata2010j.tar.gz 2010-07-26 tzcode2010k.tar.gz tzdata2010k.tar.gz 2010-08-16 tzcode2010l.tar.gz tzdata2010l.tar.gz 2010-09-27 tzcode2010m.tar.gz tzdata2010m.tar.gz 2010-10-25 tzcode2010n.tar.gz tzdata2010n.tar.gz 2010-11-01 tzdata2010o.tar.gz only 2011-01-24 tzcode2011a.tar.gz tzdata2011a.tar.gz 2011-02-07 tzcode2011b.tar.gz tzdata2011b.tar.gz 2011-03-07 tzcode2011c.tar.gz tzdata2011c.tar.gz 2011-03-14 tzcode2011d.tar.gz tzdata2011d.tar.gz 2011-04-01 tzcode2011e.tar.gz tzdata2011e.tar.gz 2011-04-25 tzcode2011g.tar.gz tzdata2011g.tar.gz 2011-06-27 tzdata2011h.tar.gz only 2011-08-29 tzcode2011i.tar.gz tzdata2011i.tar.gz 2011-09-12 tzdata2011j.tar.gz only 2011-09-26 tzdata2011k.tar.gz only 2011-10-10 tzdata2011l.tar.gz only -zefram

5 5

Fixing make check output...
by Kevin Lyda Oct. 13, 2011

Oct. 13, 2011

To get make check to run on Ubuntu, I had to do the following: apt-get install w3-recs sp cp -a /usr/share/doc/w3-recs/html/www.w3.org/TR/1999/REC-html401-19991224 . find REC-html401-19991224 -name '*.gz' -print0 | xargs -0 gunzip I then copied the command make check wanted to run and tweaked it like so: SGML_CATALOG_FILES=HTML4.cat SGML_SEARCH_PATH=REC-html401-19991224/ SP_CHARSET_FIXED=YES SP_ENCODING=UTF-8 nsgmls -s -B -wall -wno-unused-param tz-art.htm tz-link.htm I'm not really sure what tz-art.htm is for, but this is the diff required to make it actually pass... diff --git a/tz-art.htm b/tz-art.htmindex 902371e..f3064ee 100644--- a/tz-art.htm+++ b/tz-art.htm@@ -213,7 +213,7 @@ Supernaw.</td></tr> <tr><td>ID</td><td>272</td></tr> <tr><td>Total Time</td><td>73:05</td></tr> <tr><td>Notes</td><td>Includes the song "Twilight Time Zone."</td></tr>-<tr><td><a href="http://www.allmusic.com/cg/amg.dll?p=amg&sql=10:w9fpxzykldje">AMG Ra+<tr><td><a href="http://www.allmusic.com/cg/amg.dll?p=amg&sql=10:w9fpxzykldje">AM <tr><td>ADO Rating</td><td>2 stars</td></tr> <tr><td> </td></tr>@@ -224,7 +224,7 @@ Supernaw.</td></tr> <tr><td>Label</td><td>Columbia</td></tr> <tr><td>ID</td><td>CK-8905</td></tr> <tr><td>Total Time</td><td>45:36</td></tr>-<tr><td><a href="http://www.allmusic.com/cg/amg.dll?p=amg&sql=10:gifqxqt5ld0e">AMG Ra+<tr><td><a href="http://www.allmusic.com/cg/amg.dll?p=amg&sql=10:gifqxqt5ld0e">AM <tr><td>ADO Rating</td><td>1.5 stars</td></tr> <tr><td>Notes<td>The title song is also available on "Bob Dylan's Greatest Hits" and <tr><td> </td></tr>@@ -235,7 +235,7 @@ Supernaw.</td></tr> <tr><td>Label</td><td>Universal Jazz France</td></tr> <tr><td>ID</td><td>B0012688-02</td></tr> <tr><td>Total Time</td><td>42:31</td></tr>-<tr><td><a href="http://www.allmusic.com/cg/amg.dll?p=amg&sql=10:3bftxzw0ldhe"</a>AMG+<tr><td><a href="http://www.allmusic.com/cg/amg.dll?p=amg&sql=10:3bftxzw0ldhe">AM <tr><td>ADO Rating</td><td>2.5 stars</td></tr> <tr><td>Notes<td>Includes the song "Fire and Wood" with the lyric "The clocks were turned back you remeber/Think it's still November." -- Kevin Lyda Dublin, Ireland US Citizen overseas? We can vote. Register now: http://www.votefromabroad.org/

1 0

32 municipalities in Mato Grosso, Brazil not to observe DST
by Steffen Thorsen Oct. 13, 2011

Oct. 13, 2011

According to many news sources, 32 municipalities in Mato Grosso will change their clocks for DST the coming weekend, so this will split Mato Grosso into two different zones. One example: http://www.redenergia.com/concessionarias/noticias/5476/Concessionarias-Ger… Biggest city we could find among them was Barra do Garças. Our view of it: http://www.timeanddate.com/news/time/brazil-time-changes-2011.html Best regards, Steffen Thorsen - timeanddate.com

1 0

400-year-repeat edge cases
by Zefram Oct. 12, 2011

Oct. 12, 2011

For tzfile readers that make use of the 400-year cycle where a rule can't be expressed in POSIX-TZ form, I'm concerned that going exactly 400 years beyond the last rule change isn't sufficient. The year at the start of that cycle, the year that would otherwise have been the last one mentioned in the tzfile, might be contaminated by one-shot rules, making it an invalid example of the cyclical rules. Also, the transitions included for the last year of the cycle don't adequately delimit the whole cycle. I propose to avoid these edge problems by adding an extra two years of explicit observations when listing 400 years of the future. One extra year would probably suffice; two certainly does, and allows for conservative tzfile readers to drop poorly-delimited observations at the ends. Think of them as telomeres. Attached patch implements. This affects about six of the tzfiles. (Between five and seven, depending on which of my previous patches you applied.) They mostly get 36 bytes longer. -zefram

1 0

FW: missing extension rules
by Olson, Arthur David (NIH/NCI) [E] Oct. 12, 2011

Oct. 12, 2011

I'm forwarding this message from Zefram; since sending it, Zefram has subscribed to the time zone mailing list. --ado -----Original Message----- From: Zefram [mailto:zefram@fysh.org] Sent: Wednesday, September 28, 2011 6:10 To: tz(a)lecserver.nci.nih.gov Subject: missing extension rules I've found a problem with the tzfiles for Africa/Cairo and America/Argentina/San_Luis. They both show a last known transition in the recent past, and surprisingly lack a POSIX-TZ-format rule for extending the zone into the future. My tzfile parser treats a zone with no extension rule as being undefined for any time following the last explicit transition, so for these two zones it reckons the zone is undefined for the present. In the source files they're each currently configured to observe a set of DST rules, and the ruleset has no transitions configured for the future. So for the present and foreseeable future, the zone is on a constant offset with no DST transitions. The tzfile reflects that by showing no transitions from the present up to 2038 (where zic always fills in a complete set of expected transitions). It should be trivial to also reflect that foreseen behaviour in a POSIX-TZ string that just gives a fixed offset and no DST rule. For example, Africa/Cairo should clearly have "EET-2". I could have a go at a zic patch to fix this, if the regular zic hackers would like to work that way. For America/Argentina/San_Luis there's an extra wrinkle: the last known transition is a transition *to* DST. Its fixed-offset foreseeable behaviour therefore has a fixed is_dst=1, which is moderately silly. It's arguable that in this case it would be incorrect to give a "WARST3" extension rule, because that doesn't accurately express the DST status. Since that DST transition was in 2009, it's also a good bet that they haven't stayed continuously on DST since then, of course. -zefram

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Re: [tz] temporary timezone database home ...
by David Braverman Oct. 11, 2011

Oct. 11, 2011

Um...a statement in a creative work that says "this work is in the public domain" generally *does* put it in the public domain. Anyone who owns property is free to give it away. In the case of the U.S. government, since the government (in theory) is owned by the citizens of the U.S., as a matter of public policy U.S. government works are in the public domain. 17 USC 105 states this explicitly, but does allows the U.S. government to hold copyrights by devise (for example, through a gift or a tax lien). I believe ADO had to clarify that the tzinfo database fell into the first category and not the second; thus, the "public domain" language in the tzinfo files. And IAAL (just not practicing). :) David Braverman http://www.wx-now.com/

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