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const cleanup for scheck
by roland＠redhat.com Jan. 10, 2006

Jan. 10, 2006

Please consider including these changes, which reduce some ugly warnings compiling scheck.c for zic. Thanks, Roland Index: private.h =================================================================== RCS file: /cvs/glibc/libc/timezone/private.h,v retrieving revision 1.11 diff -u -r1.11 private.h --- private.h 10 Jan 2006 07:55:37 -0000 1.11 +++ private.h 10 Jan 2006 09:46:12 -0000 @@ -218,7 +218,7 @@ void * irealloc P((void * pointer, int size)); void icfree P((char * pointer)); void ifree P((char * pointer)); -char * scheck P((const char *string, char *format)); +const char *scheck P((const char *string, const char *format)); /* ** Finally, some convenience items. Index: scheck.c =================================================================== RCS file: /cvs/glibc/libc/timezone/scheck.c,v retrieving revision 1.3 diff -u -r1.3 scheck.c --- scheck.c 6 Aug 2005 05:40:57 -0000 1.3 +++ scheck.c 10 Jan 2006 09:46:12 -0000 @@ -8,20 +8,19 @@ #include "private.h" -char * +const char * scheck(string, format) const char * const string; -char * const format; +const char * const format; { register char * fbuf; register const char * fp; register char * tp; register int c; - register char * result; + register const char * result; char dummy; - static char nada; - result = &nada; + result = ""; if (string == NULL || format == NULL) return result; fbuf = imalloc((int) (2 * strlen(format) + 4)); @@ -53,7 +52,7 @@ *tp++ = 'c'; *tp = '\0'; if (sscanf(string, fbuf, &dummy) != 1) - result = (char *) format; + result = format; ifree(fbuf); return result; }

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Re: New Brunswick switches at 00:01, not 02:00; new Zone needed
by Paul Eggert Jan. 2, 2006

Jan. 2, 2006

[I'm sending this on behalf of Clive D.W. Feather, who had problems with sending email to <tz(a)lecserver.nci.nih.gov>.] ----- From: "Clive D.W. Feather" <clive(a)demon.net> Date: Wed, 28 Dec 2005 09:34:14 +0000 Paul Eggert said: > I found a copy of New Brunswick's Time Definition Act consolidated to > 2005-07-15 <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> and it confirms > that New Brunswick switches to and from DST at 00:01 rather than > 02:00. > Page 2 of the above reference says "1965, c.7, s.1; 1973, c.74, s.75; > 1993, c.9, s.1; 2005, c.7, s.83." I assume this refers to dates when > the law changed, It looks to me like references to the legislation making the change. In the UK, the first of these would be "section 1 of chapter 7 of the laws of 1965"; chapter 7 is, in turn, the 7th Public Act passed in that year. Since the cited work says "This Act is consolidated to <date>", I presume it's a publication that applies all the various amending Acts up to that date. Hmm; 2005 c.7 is "An Act Respecting Rural Communities" <http://www.gnb.ca/0062/acts/BBA-2005/Chap-7.pdf>. Section 83 is titled "Time Definition Act" and, found on page 123, reads: 83 Subsection 1(1) of the French version of the Time Definition Act, chapter T-6 of the Revised Statutes, 1973, is amended by striking out "municipal". It looks to me as if your original document cites all the bits of legislation you need to look up to determine the changes. Hmm, on second thoughts, if one change cancels a previous one, the previous one might not be shown. Sorry. -- Clive D.W. Feather | Work: <clive(a)demon.net> | Tel: +44 20 8495 6138 Internet Expert | Home: <clive(a)davros.org> | Fax: +44 870 051 9937 Demon Internet | WWW: http://www.davros.org | Mobile: +44 7973 377646 Thus plc | |

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Leap seconds in the news
by Olson, Arthur David (NIH/NCI) [E] Dec. 27, 2005

Dec. 27, 2005

The Washington Post's Monday, December 26, 2005 edition includes, on page A17, the story "Added Ticktock of the Clock Restarts Time Debate." The story is precipitated by the upcoming leap second. (My guess is that author Guy Gugliotta wrote it well in advance rather than on Christmas Day.) The story is available from http://washingtonpost.com; free registration is required. --ado

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Tzcode2005r.tar.gz and tzdata2005r.tar.gz
by Olson, Arthur David (NIH/NCI) [E] Dec. 27, 2005

Dec. 27, 2005

The files... ftp://elsie.nci.nih.gov/pub/tzcode2005r.tar.gz ...and... ftp://elsie.nci.nih.gov/pub/tzdata2005r.tar.gz ...are now available. Most importantly, these reflect the Canadian changes circulated last week on the time zone mailing list by Paul Eggert. They also add "<pre>" directives to time zone data files and reflect changes to warning message logic in "zdump.c" (but with calls to "gettext" kept unbundled at the suggestion of Ken Pizzini). With providence, that's it for 2005! --ado

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Zdump.c
by Olson, Arthur David (NIH/NCI) [E] Dec. 23, 2005

Dec. 23, 2005

Here are proposed changes to zdump.c, reflecting suggestions from Robbin Kawabata. --ado ------- zdump.c ------- *** /tmp/geta11896 Thu Dec 22 10:20:54 2005 --- /tmp/getb11896 Thu Dec 22 10:20:54 2005 *************** *** 1,4 **** ! static char elsieid[] = "@(#)zdump.c 7.72"; /* ** This code has been made independent of the rest of the time --- 1,4 ---- ! static char elsieid[] = "@(#)zdump.c 7.73"; /* ** This code has been made independent of the rest of the time *************** *** 212,222 **** while (isascii((unsigned char) *cp) && isalpha((unsigned char) *cp)) ++cp; if (cp - abbrp == 0) ! wp = _("lacks alphabetic at start"); ! if (cp - abbrp < 3) ! wp = _("has fewer than 3 alphabetics"); ! if (cp - abbrp > 6) ! wp = _("has more than 6 alphabetics"); if (wp == NULL && (*cp == '+' || *cp == '-')) { ++cp; if (isascii((unsigned char) *cp) && --- 212,222 ---- while (isascii((unsigned char) *cp) && isalpha((unsigned char) *cp)) ++cp; if (cp - abbrp == 0) ! wp = "lacks alphabetic at start"; ! else if (cp - abbrp < 3) ! wp = "has fewer than 3 alphabetics"; ! else if (cp - abbrp > 6) ! wp = "has more than 6 alphabetics"; if (wp == NULL && (*cp == '+' || *cp == '-')) { ++cp; if (isascii((unsigned char) *cp) && *************** *** 223,237 **** isdigit((unsigned char) *cp)) if (*cp++ == '1' && *cp >= '0' && *cp <= '4') ++cp; } - if (*cp != '\0') - wp = _("differs from POSIX standard"); if (wp == NULL) return; (void) fflush(stdout); (void) fprintf(stderr, _("%s: warning: zone \"%s\" abbreviation \"%s\" %s\n"), ! progname, zone, abbrp, wp); warned = TRUE; } --- 223,237 ---- isdigit((unsigned char) *cp)) if (*cp++ == '1' && *cp >= '0' && *cp <= '4') ++cp; + if (*cp != '\0') + wp = "differs from POSIX standard"; } if (wp == NULL) return; (void) fflush(stdout); (void) fprintf(stderr, _("%s: warning: zone \"%s\" abbreviation \"%s\" %s\n"), ! progname, zone, abbrp, _(wp)); warned = TRUE; }

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Timezone mailing list
by Graham Yarbrough Dec. 22, 2005

Dec. 22, 2005

I was given this email as a source of information relating to timezones and time calculation. Was that correct? Could you please advise what is available and how I might obtain it?

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New Brunswick switches at 00:01, not 02:00; new Zone needed
by Paul Eggert Dec. 21, 2005

Dec. 21, 2005

I found a copy of New Brunswick's Time Definition Act consolidated to 2005-07-15 <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> and it confirms that New Brunswick switches to and from DST at 00:01 rather than 02:00. So we need a new Zone. I am thinking of using the name America/Moncton. Moncton has approximately the same population as Saint John, but the latter name is uncomfortably close to the already-existing Zone America/St_Johns. Page 2 of the above reference says "1965, c.7, s.1; 1973, c.74, s.75; 1993, c.9, s.1; 2005, c.7, s.83." I assume this refers to dates when the law changed, which would be useful for tracking down the history of America/Moncton. I did track down an older version of the consolidated document <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> which makes it clear that they haven't changed the rules since 1993 at least, but I can't go earlier than that in the canlii.org database. For dates before 1993 I'll probably defer to Shanks, unless someone else can track it down.

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Manitoba, Ontario, P.E.I., Quebec adopt 2007 US DST change
by Paul Eggert Dec. 21, 2005

Dec. 21, 2005

I looked around for news reports of the effect on the US's 2007 daylight-saving plans on Canada, and found reports that Manitoba, Ontario, P.E.I., and Quebec are committed to switching, and other provinces are thinking of switching. My assumption is that all of Canada (save perhaps Newfoundland) will switch, but that it's too early to regard this as official. One problem is how to reflect this in the tz database. I'm inclined to propose something along the following lines, at least for now, to keep the tables simple; we should be able to fix things before 2007 if some of the provinces decline to follow the US lead. Please see the changes in commentary below to see what provinces would be affected. =================================================================== RCS file: RCS/northamerica,v retrieving revision 2005.15.1.3 diff -pu -r2005.15.1.3 northamerica --- northamerica 2005/12/20 15:04:00 2005.15.1.3 +++ northamerica 2005/12/21 21:00:48 @@ -820,18 +820,37 @@ Zone America/Menominee -5:50:27 - LMT 18 # Unless otherwise specified, the data for Canada are all from Shanks. -# From Paul Eggert (2000-10-02): +# From Paul Eggert (2005-12-21): # H. David Matthews and Mary Vincent's map -# <a href="http://www.canadiangeographic.ca/SO98/geomap.htm"> +# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> # "It's about TIME", _Canadian Geographic_ (September-October 1998) # </a> contains detailed boundaries for regions observing nonstandard # time and daylight saving time arrangements in Canada circa 1998. # -# INMS, the Institute for National Measurement Standards in Ottawa, has -# <a href="http://www.nrc.ca/inms/time/tze.html"> +# INMS, the Institute for National Measurement Standards in Ottawa, has <a +# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> # information about standard and daylight saving time zones in Canada. # </a> (updated periodically). # Its unofficial information is often taken from Matthews and Vincent. +# +# CBC News reported that Ontario and Manitoba have announced plans to +# follow the US change, and that Nova Scotia is considering it; see +# <http://www.cbc.ca/news/background/daylightsavingtime/> (2005-10-21). +# CBC news also reported that Prince Edward Island is the first +# province in Atlantic Canada to follow the US change, and that Quebec +# had agreed; see <http://www.cbc.ca/pei/story/pe_daylight_20051207.html> +# (2005-12-07). +# +# To reflect all this, the Canada and Winn rules have been adjusted to +# agree with the 2007 US change. This means we assume most of Canada +# will fall into line. However, Alberta, British Columbia, +# Newfoundland, Northwest Territories, and Yukon already have separate +# rules in our database, so for now we'll leave them alone, which +# means that we currently assume these regions will not change their +# rules and will disagree with the US starting in 2007. This +# assumption is probably incorrect, with the possible exception of +# Newfoundland. We plan to adjust the Edm, Vanc, StJohns, and NT_YK +# rules as the corresponding provinces make their announcements. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Canada 1918 only - Apr 14 2:00 1:00 D @@ -840,8 +859,10 @@ Rule Canada 1942 only - Feb 9 2:00 1:00 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Canada 1945 only - Sep 30 2:00 0 S Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D -Rule Canada 1974 max - Oct lastSun 2:00 0 S -Rule Canada 1987 max - Apr Sun>=1 2:00 1:00 D +Rule Canada 1974 2006 - Oct lastSun 2:00 0 S +Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D +Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D +Rule Canada 2007 max - Nov Sun>=1 2:00 0 S # Newfoundland (and far southeast Labrador) @@ -1167,11 +1188,13 @@ Rule Winn 1963 only - Apr lastSun 2:00 1 Rule Winn 1963 only - Sep 22 2:00 0 S Rule Winn 1966 1986 - Apr lastSun 2:00 1:00 D Rule Winn 1966 1986 - Oct lastSun 2:00 0 S -Rule Winn 1987 max - Apr Sun>=1 2:00 1:00 D +Rule Winn 1987 2006 - Apr Sun>=1 2:00s 1:00 D # From Paul Eggert (2000-10-02): # INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from # DST at 03:00 local time. For now, assume it started in 1987. -Rule Winn 1987 max - Oct lastSun 2:00s 0 S +Rule Winn 1987 2006 - Oct lastSun 2:00s 0 S +Rule Winn 2007 max - Mar Sun>=8 2:00s 1:00 D +Rule Winn 2007 max - Nov Sun>=1 2:00s 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 -6:00 Winn C%sT

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RE: latest try at backward/northamerica fix
by Olson, Arthur David (NIH/NCI) [E] Dec. 21, 2005

Dec. 21, 2005

I'd suggest making the addition shown below to the commentary; otherwise the proposed change looks great. --ado ------- northamerica ------- *** /tmp/geta893 Tue Dec 20 10:02:12 2005 --- /tmp/getb893 Tue Dec 20 10:02:12 2005 *************** *** 1,4 **** ! # @(#)northamerica 7.85 # <pre> # also includes Central America and the Caribbean --- 1,4 ---- ! # @(#)northamerica 7.86 # <pre> # also includes Central America and the Caribbean *************** *** 136,141 **** --- 136,143 ---- # From Arthur David Olson, 2005-12-19 # We generate the files specified below to guard against old files with # obsolete information being left in the time zone binary directory. + # We limit the list to names that have appeared in previous versions of + # this time zone package. # We do these as separate Zones rather than as Links to avoid problems if # a particular place changes whether it observes DST. # We put these specifications here in the northamerica file both to

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Re: latest try at backward/northamerica fix
by Paul Eggert Dec. 19, 2005

Dec. 19, 2005

Arthur David Olson <olsona(a)elsie.nci.nih.gov> writes: > Here's my lastest try at avoiding problems with zones such as CST5CDT; The patch to 'backward' looks fine, but the patch to 'northamerica' has some problems. First, it removes support for TZ='EST', TZ='MST', TZ='HST', which have been in the tz database since 1987. Second, it creates new Zones AST4ADT, YST9YDT, HST10HDT that are not needed for backwards compatibility, as they have never been supported by the tz data. Third, it creates new Zones AST4, EST5, CST6, MST7, PST8, YST9, HST10 that also are not needed for backward compatibility (for the same reason as above), and furthermore don't change how TZ strings are evaluated (as they are equivalent to their POSIX interpretations). Here's a proposed patch to 'northamerica' to address these issues. --- northamerica 2005/11/28 15:52:28 2005.15 +++ northamerica 2005/12/19 21:52:52 2005.15.1.2 @@ -131,6 +131,24 @@ Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D Rule US 2007 max - Nov Sun>=1 2:00 0 S +# From Arthur David Olson, 2005-12-19 +# We generate the files specified below to guard against old files with +# obsolete information being left in the time zone binary directory. +# We do these as separate Zones rather than as Links to avoid problems if +# a particular place changes whether it observes DST. +# We put these specifications here in the northamerica file both to +# increase the chances that they'll actually get compiled and to +# avoid the need to duplicate the US rules in another file. + +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone EST -5:00 - EST +Zone MST -7:00 - MST +Zone HST -10:00 - HST +Zone EST5EDT -5:00 US E%sT +Zone CST6CDT -6:00 US C%sT +Zone MST7MDT -7:00 US M%sT +Zone PST8PDT -8:00 US P%sT + # From Bob Devine (1988-01-28): # ...Alaska (and Hawaii) had the timezone names changed in 1967. # old new

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Revised: Tzcode2005q.tar.gz and tzdata2005q.tar.gz
by Olson, Arthur David (NIH/NCI) [E] Dec. 13, 2005

Dec. 13, 2005

[Thanks to Bennett Todd for catching the typo in the message sent earlier. --ado] The files... ftp://elsie.nci.nih.gov/pub/tzcode2005q.tar.gz ...and... ftp://elsie.nci.nih.gov/pub/tzdata2005q.tar.gz ...are now available. Nothing earth-shaking here; as circulated on the time zone mailing list: 1. Electronic mail addresses have been removed. 2. Casts of the return value of exit have been removed. 3. Casts of the argument of is.* macros have been added. 4. Indentation in one section of zic.c has been fixed. 5. References to dead URLs in the data files have been dealt with. Note that 2005r can be expected before the end of the year with more minor tweaks. --ado

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Small changes to make tz data files more readable when used as html
by Olson, Arthur David (NIH/NCI) [E] Dec. 13, 2005

Dec. 13, 2005

The changes below just add "<pre>" directives to each of the primary data files (which, coincidentally, are the ones that contain "<a href=.*>" stuff); this makes them more readable when they're given ".htm" extensions and made available to browsers. Yes, more would need to be done to make this legitimate, but it works for my purposes and, I hope, works for yours as well. --ado ------- africa ------- *** /tmp/geta10846 Tue Dec 13 10:36:00 2005 --- /tmp/getb10846 Tue Dec 13 10:36:00 2005 *************** *** 1,4 **** ! # @(#)africa 7.39 # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to --- 1,5 ---- ! # @(#)africa 7.40 ! # <pre> # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to ------- antarctica ------- *** /tmp/geta10865 Tue Dec 13 10:36:00 2005 --- /tmp/getb10865 Tue Dec 13 10:36:00 2005 *************** *** 1,4 **** ! # @(#)antarctica 7.29 # From Paul Eggert (1999-11-15): # To keep things manageable, we list only locations occupied year-round; see --- 1,5 ---- ! # @(#)antarctica 7.30 ! # <pre> # From Paul Eggert (1999-11-15): # To keep things manageable, we list only locations occupied year-round; see ------- asia ------- *** /tmp/geta10884 Tue Dec 13 10:36:00 2005 --- /tmp/getb10884 Tue Dec 13 10:36:00 2005 *************** *** 1,4 **** ! # @(#)asia 7.89 # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to --- 1,5 ---- ! # @(#)asia 7.90 ! # <pre> # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to ------- australasia ------- *** /tmp/geta10903 Tue Dec 13 10:36:01 2005 --- /tmp/getb10903 Tue Dec 13 10:36:01 2005 *************** *** 1,4 **** ! # @(#)australasia 7.77 # This file also includes Pacific islands. # Notes are at the end of this file --- 1,6 ---- ! # @(#)australasia 7.78 ! # <pre> ! # This file also includes Pacific islands. # Notes are at the end of this file ------- europe ------- *** /tmp/geta10922 Tue Dec 13 10:36:01 2005 --- /tmp/getb10922 Tue Dec 13 10:36:01 2005 *************** *** 1,4 **** ! # @(#)europe 7.95 # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to --- 1,5 ---- ! # @(#)europe 7.96 ! # <pre> # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to ------- northamerica ------- *** /tmp/geta10941 Tue Dec 13 10:36:01 2005 --- /tmp/getb10941 Tue Dec 13 10:36:01 2005 *************** *** 1,4 **** ! # @(#)northamerica 7.82 # also includes Central America and the Caribbean # This data is by no means authoritative; if you think you know better, --- 1,6 ---- ! # @(#)northamerica 7.83 ! # <pre> ! # also includes Central America and the Caribbean # This data is by no means authoritative; if you think you know better, ------- southamerica ------- *** /tmp/geta10960 Tue Dec 13 10:36:02 2005 --- /tmp/getb10960 Tue Dec 13 10:36:02 2005 *************** *** 1,4 **** ! # @(#)southamerica 7.65 # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to --- 1,5 ---- ! # @(#)southamerica 7.66 ! # <pre> # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to

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Tzcode2005q.tar.gz and tzdata2005q.tar.gz
by Olson, Arthur David (NIH/NCI) [E] Dec. 13, 2005

Dec. 13, 2005

The files... ftp://elsie.nci.nih.gov/pub/tzcode2005q.tar.gz ...and... ftp://elsie.nci.nih.gov/pub/tzdata200tq.tar.gz ...are now available. Nothing earth-shaking here; as circulated on the time zone mailing list: 1. Electronic mail addresses have been removed. 2. Casts of the return value of exit have been removed. 3. Casts of the argument of is.* macros have been added. 4. Indentation in one section of zic.c has been fixed. 5. References to dead URLs in the data files have been dealt with. Note that 2005r can be expected before the end of the year with more minor tweaks. --ado

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RE: proposed bad-URL changes for antarctica, australasia, and southamerica
by Olson, Arthur David (NIH/NCI) [E] Dec. 12, 2005

Dec. 12, 2005

Thanks for the suggestions on the the bad URLs. I tracked down a replacement for the New-South-Wales-specific page. I'd like to keep the no-longer-working URL for Heard Island since there's no other source for that information. So...here's what I currently have by way of differences against the data that's now available via ftp from elsie (note that removal of electronic mail addresses is also reflected below). --ado ------- antarctica ------- *** /tmp/geta4343 Mon Dec 12 10:13:14 2005 --- /tmp/getb4343 Mon Dec 12 10:13:14 2005 *************** *** 1,4 **** ! # @(#)antarctica 7.25 # From Paul Eggert (1999-11-15): # To keep things manageable, we list only locations occupied year-round; see --- 1,4 ---- ! # @(#)antarctica 7.28 # From Paul Eggert (1999-11-15): # To keep things manageable, we list only locations occupied year-round; see *************** *** 59,68 **** # Australia - territories # Heard Island, McDonald Islands (uninhabited) # previously sealers and scientific personnel wintered ! # <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html"> # Margaret Turner reports # </a> (1999-09-30) that they're UTC+5, with no DST; # presumably this is when they have visitors. # # year-round bases # Casey, Bailey Peninsula, -6617+11032, since 1969 --- 59,69 ---- # Australia - territories # Heard Island, McDonald Islands (uninhabited) # previously sealers and scientific personnel wintered ! # <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html" chkurls="nocheck"> # Margaret Turner reports # </a> (1999-09-30) that they're UTC+5, with no DST; # presumably this is when they have visitors. + # [ADO: no nameserver entry for www.dstc.qut.edu.au on 2005-12-08.] # # year-round bases # Casey, Bailey Peninsula, -6617+11032, since 1969 *************** *** 106,112 **** # France - year-round bases # ! # From Antoine Leca <Antoine.Leca(a)Renault.FR> (1997-01-20): # Time data are from Nicole Pailleau at the IFRTP # (French Institute for Polar Research and Technology). # She confirms that French Southern Territories and Terre Adelie bases --- 107,113 ---- # France - year-round bases # ! # From Antoine Leca (1997-01-20): # Time data are from Nicole Pailleau at the IFRTP # (French Institute for Polar Research and Technology). # She confirms that French Southern Territories and Terre Adelie bases *************** *** 139,149 **** 0 - zzz 1956 Nov 10:00 - DDUT # Dumont-d'Urville Time # Reference: ! # <a href="http://www.icair.iac.org.nz/science/reports/fr/IFRTP.html"> ! # Support and Development of Polar Research and Technology (1997-02-03) # </a> - # Germany - year-round base # Georg von Neumayer, -7039-00815 --- 140,149 ---- 0 - zzz 1956 Nov 10:00 - DDUT # Dumont-d'Urville Time # Reference: ! # <a href="http://en.wikipedia.org/wiki/Dumont_d'Urville_Station"> ! # Dumont d'Urville Station (2005-12-05) # </a> # Germany - year-round base # Georg von Neumayer, -7039-00815 *************** *** 155,163 **** # Syowa, -690022+0393524 # # From Hideyuki Suzuki (1999-02-06): ! # In all Japanese stations, +0300 is used as the standard time. [See] ! # <a href="http://www.crl.go.jp/uk/uk201/basyo.htm">[reference in Japanese]</a> ! # and information from KAMO Hiroyasu. # # Syowa station, which is the first antarctic station of Japan, # was established on 1957-01-29. Since Syowa station is still the main --- 155,161 ---- # Syowa, -690022+0393524 # # From Hideyuki Suzuki (1999-02-06): ! # In all Japanese stations, +0300 is used as the standard time. # # Syowa station, which is the first antarctic station of Japan, # was established on 1957-01-29. Since Syowa station is still the main *************** *** 296,302 **** # Normally it wouldn't have a separate entry, since it's like the # larger Antarctica/McMurdo since 1970, but it's too famous to omit. # ! # From Chris Carrier <72157.3334(a)CompuServe.COM> (1996-06-27): # Siple, the first commander of the South Pole station, # stated that he would have liked to have kept GMT at the station, # but that he found it more convenient to keep GMT+12 --- 294,300 ---- # Normally it wouldn't have a separate entry, since it's like the # larger Antarctica/McMurdo since 1970, but it's too famous to omit. # ! # From Chris Carrier (1996-06-27): # Siple, the first commander of the South Pole station, # stated that he would have liked to have kept GMT at the station, # but that he found it more convenient to keep GMT+12 ------- australasia ------- *** /tmp/geta4362 Mon Dec 12 10:13:14 2005 --- /tmp/getb4362 Mon Dec 12 10:13:14 2005 *************** *** 1,4 **** ! # @(#)australasia 7.74 # This file also includes Pacific islands. # Notes are at the end of this file --- 1,4 ---- ! # @(#)australasia 7.77 # This file also includes Pacific islands. # Notes are at the end of this file *************** *** 551,560 **** # Australia ! # <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html"> ! # Australia's Daylight Saving Times ! # </a>, by Margaret Turner, summarizes daylight saving issues in Australia. # From John Mackin (1991-03-06): # We in Australia have _never_ referred to DST as `daylight' time. # It is called `summer' time. Now by a happy coincidence, `summer' --- 551,566 ---- # Australia ! # From Paul Eggert (2005-12-08): ! # <a href="http://www.bom.gov.au/climate/averages/tables/dst_times.shtml"> ! # Implementation Dates of Daylight Saving Time within Australia ! # </a> summarizes daylight saving issues in Australia. + # From Arthur David Olson (2005-12-12): + # <a href="http://www.lawlink.nsw.gov.au/lawlink/Corporate/ll_agdinfo.nsf/pag es/community_relations_daylight_saving"> + # Lawlink NSW:Daylight Saving in New South Wales + # </a> covers New South Wales in particular. + # From John Mackin (1991-03-06): # We in Australia have _never_ referred to DST as `daylight' time. # It is called `summer' time. Now by a happy coincidence, `summer' *************** *** 960,976 **** # legislation. This is very important to understand. # I have researched New South Wales time only... - # From Paul Eggert (1999-09-27): - # The Information Service of the Australian National Standards Commission - # <a href="http://www.nsc.gov.au/InfoServ/Ileaflet/il27.htm"> - # Daylight Saving - # </a> page (1995-04) has an excellent overall history of Australian DST. - # The Community Relations Division of the NSW Attorney General's Department - # publishes a history of daylight saving in NSW. See: - # <a href="http://www.lawlink.nsw.gov.au/crd.nsf/pages/time2"> - # Lawlink NSW: Daylight Saving in New South Wales - # </a> - # From Eric Ulevik (1999-05-26): # DST will start in NSW on the last Sunday of August, rather than the usual # October in 2000. [See: Matthew Moore, --- 966,971 ---- *************** *** 1048,1054 **** # Lord Howe Island # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): ! # LHI... [ Courtesy of Pauline Van Winsen.. pauline@Aus ] # [ Dec 1990 ] # Lord Howe Island is located off the New South Wales coast, and is half an # hour ahead of NSW time. --- 1043,1049 ---- # Lord Howe Island # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): ! # LHI... [ Courtesy of Pauline Van Winsen ] # [ Dec 1990 ] # Lord Howe Island is located off the New South Wales coast, and is half an # hour ahead of NSW time. *************** *** 1088,1094 **** # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): # # The Country of New Zealand (Australia's east island -) Gee they hate that! # # or is Australia the west island of N.Z. ! # # [ courtesy of Geoff Tribble.. Geofft@Aus.. Auckland N.Z. ] # # [ Nov 1990 ] # ... # Rule NZ 1974 1988 - Oct lastSun 2:00 1:00 D --- 1083,1089 ---- # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): # # The Country of New Zealand (Australia's east island -) Gee they hate that! # # or is Australia the west island of N.Z. ! # # [ courtesy of Geoff Tribble.. Auckland N.Z. ] # # [ Nov 1990 ] # ... # Rule NZ 1974 1988 - Oct lastSun 2:00 1:00 D ------- southamerica ------- *** /tmp/geta4381 Mon Dec 12 10:13:14 2005 --- /tmp/getb4381 Mon Dec 12 10:13:14 2005 *************** *** 1,4 **** ! # @(#)southamerica 7.63 # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to --- 1,4 ---- ! # @(#)southamerica 7.65 # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to *************** *** 525,536 **** # This year, the ending date of DS was postponed to March 1 # to help dealing with the shortages of electric power. # - # From Paul Eggert (1998-02-25): - # <a href="http://churchnet.ucsm.ac.uk/news/files2/news165.htm"> - # Brazil Prepares for Papal Visit - # </a>, - # Church Net UK (1997-10-02). - # # Decree 2,317 (1997-09-04), adopted by same states. Rule Brazil 1997 only - Oct 6 0:00 1:00 S # Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a> --- 525,530 ----

2 1

FW: FW: changes to zdump.c and zic.c invocations of is.* macros
by Olson, Arthur David (NIH/NCI) [E] Dec. 12, 2005

Dec. 12, 2005

Another that seems to have gone to lecserver rather than elsie. --ado -----Original Message----- From: Paul Eggert [mailto:eggert@cs.ucla.edu] Sent: Thursday, December 08, 2005 4:23 PM To: tz(a)lecserver.nci.nih.gov Subject: Re: FW: changes to zdump.c and zic.c invocations of is.* macros > From: Robert Elz [mailto:kre@munnari.OZ.AU] > Sent: Tuesday, December 06, 2005 10:20 PM > | ! while (isascii((unsigned char) *cp) && > > You sometimes do better if you write that as > > while (isascii(*(unsigned char *)cp) && > > It can also be a little clearer what you're intending - there's no > intention here to fetch the char, then convert it to unsigned, all we > want is the 0..255 value that cp points at. If memory serves, the latter form (*(unsigned char *)cp) is not portable to all C89 hosts, whereas the former form ((unsigned char) *cp) is. The idea is that some C89 hosts might have padding bits in their unsigned char representation, and it's incorrect to access a char as if it were unsigned char. I believe this issue got cleared up in C99, so the code is portable to C99 compilers. But the zic stuff attempts to be portable to C89 (as well as earlier) compilers. > it is certainly true that it's possible to test for digits by using > >= '0' && <= '9' tests - but if that's the best way to write it, > then that's what isdigit() ought to be doing. Alas, that's not true in practice. isdigit is typically slower, and it can be quite a bit slower. For example, on my host (Debian GNU/Linux stable, GCC 4.0.2, gcc -O4), with the following code: int F (char *p) { return isdigit ((unsigned char) *p) != 0; } int G (char *p) { return '0' <= *p && *p <= '9'; } F compiles into 12 instructions that contain a subtroutine call (for a total of 31 instructions executed), whereas G compiles into 10 instructions of straight-line code. I think part of the problem is that isdigit might be sensitive to the locale. So there's a correctness issue here as well; isdigit might actually return the wrong value, since it might think that some other byte code is a digit. (This is just a theoretical issue, as far as I know, though.) > Paul's version may be textually shorter, but with that cp++ side > effect buried in the middle of the && sequence, it is not nearly as > easy to read. True, but in my defense that buried cp++ was in the original code. How about this instead? It might be a bit clearer. char c = *cp; if ('0' <= c && c <= '9') { cp++; if (c == '1' && '0' <= *cp && *cp <= '4') cp++; }

1 0

FW: proposed bad-URL changes for antarctica, australasia, and southamerica
by Olson, Arthur David (NIH/NCI) [E] Dec. 12, 2005

Dec. 12, 2005

The below seems to have been sent to lecserver.nci.nih.gov rather than elsie.nci.nih.gov; I'm forwarding it. --ado -----Original Message----- From: Paul Eggert [mailto:eggert@cs.ucla.edu] Sent: Thursday, December 08, 2005 4:46 PM To: Arthur David Olson Cc: tz(a)lecserver.nci.nih.gov Subject: Re: proposed bad-URL changes for antarctica, australasia, and southamerica Thanks for finding those bad URLs. I went through by hand and found better ones, or elided the ones that aren't really needed. Here's a proposed patch along those lines. =================================================================== RCS file: RCS/antarctica,v retrieving revision 2005.10 retrieving revision 2005.10.0.1 diff -pu -r2005.10 -r2005.10.0.1 --- antarctica 2005/07/14 18:13:38 2005.10 +++ antarctica 2005/12/08 21:43:08 2005.10.0.1 @@ -59,9 +59,7 @@ Rule ChileAQ 2000 max - Mar Sun>=9 0:00 # Australia - territories # Heard Island, McDonald Islands (uninhabited) # previously sealers and scientific personnel wintered -# <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html"> -# Margaret Turner reports -# </a> (1999-09-30) that they're UTC+5, with no DST; +# Margaret Turner reports (1999-09-30) that they're UTC+5, with no DST; # presumably this is when they have visitors. # # year-round bases @@ -139,8 +137,8 @@ Zone Antarctica/DumontDUrville 0 - zzz 1 0 - zzz 1956 Nov 10:00 - DDUT # Dumont-d'Urville Time # Reference: -# <a href="http://www.icair.iac.org.nz/science/reports/fr/IFRTP.html"> -# Support and Development of Polar Research and Technology (1997-02-03) +# <a href="http://en.wikipedia.org/wiki/Dumont_d'Urville_Station"> +# Dumont d'Urville Station (2005-12-05) # </a> @@ -155,10 +153,7 @@ Zone Antarctica/DumontDUrville 0 - zzz 1 # Syowa, -690022+0393524 # # From Hideyuki Suzuki (1999-02-06): -# In all Japanese stations, +0300 is used as the standard time. [See] -# <a href="http://www.crl.go.jp/uk/uk201/basyo.htm">[reference in Japanese]</a> -# and information from KAMO Hiroyasu. -# +# In all Japanese stations, +0300 is used as the standard time.... # Syowa station, which is the first antarctic station of Japan, # was established on 1957-01-29. Since Syowa station is still the main # station of Japan, it's appropriate for the principal location. =================================================================== RCS file: RCS/australasia,v retrieving revision 2005.14 retrieving revision 2005.14.0.1 diff -pu -r2005.14 -r2005.14.0.1 --- australasia 2005/10/03 13:43:50 2005.14 +++ australasia 2005/12/08 21:43:08 2005.14.0.1 @@ -551,9 +551,10 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # Australia -# <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html"> -# Australia's Daylight Saving Times -# </a>, by Margaret Turner, summarizes daylight saving issues in Australia. +# From Paul Eggert (2005-12-08): +# <a +href="http://www.bom.gov.au/climate/averages/tables/dst_times.shtml"> +# Implementation Dates of Daylight Saving Time within Australia # </a> +summarizes daylight saving issues in Australia. # From John Mackin (1991-03-06): # We in Australia have _never_ referred to DST as `daylight' time. @@ -960,17 +961,6 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # legislation. This is very important to understand. # I have researched New South Wales time only... -# From Paul Eggert (1999-09-27): -# The Information Service of the Australian National Standards Commission -# <a href="http://www.nsc.gov.au/InfoServ/Ileaflet/il27.htm"> -# Daylight Saving -# </a> page (1995-04) has an excellent overall history of Australian DST. -# The Community Relations Division of the NSW Attorney General's Department -# publishes a history of daylight saving in NSW. See: -# <a href="http://www.lawlink.nsw.gov.au/crd.nsf/pages/time2"> -# Lawlink NSW: Daylight Saving in New South Wales -# </a> - # From Eric Ulevik (1999-05-26): # DST will start in NSW on the last Sunday of August, rather than the usual # October in 2000. [See: Matthew Moore, =================================================================== RCS file: RCS/southamerica,v retrieving revision 2005.15 retrieving revision 2005.15.0.1 diff -pu -r2005.15 -r2005.15.0.1 --- southamerica 2005/11/28 15:52:28 2005.15 +++ southamerica 2005/12/08 21:43:08 2005.15.0.1 @@ -525,12 +525,6 @@ Rule Brazil 1997 only - Feb 16 0:00 0 - # This year, the ending date of DS was postponed to March 1 # to help dealing with the shortages of electric power. # -# From Paul Eggert (1998-02-25): -# <a href="http://churchnet.ucsm.ac.uk/news/files2/news165.htm"> -# Brazil Prepares for Papal Visit -# </a>, -# Church Net UK (1997-10-02). -# # Decree 2,317 (1997-09-04), adopted by same states. Rule Brazil 1997 only - Oct 6 0:00 1:00 S # Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>

1 0

Time zone mail list server change
by Olson, Arthur David (NIH/NCI) [E] Dec. 9, 2005

Dec. 9, 2005

I've changed the time zone mailing list server so that when it sends out messages, replies are directed to tz(a)elsie.nci.nih.gov. With providence, this will reduce the number of messages misdirected to tz(a)lecserver.nci.nih.gov. --ado

2 1

FW: changes to zdump.c and zic.c invocations of is.* macros
by Olson, Arthur David (NIH/NCI) [E] Dec. 9, 2005

Dec. 9, 2005

-----Original Message----- From: Robert Elz [mailto:kre@munnari.OZ.AU] Sent: Tuesday, December 06, 2005 10:20 PM To: Arthur David Olson Cc: tz(a)lecserver.nci.nih.gov Subject: Re: changes to zdump.c and zic.c invocations of is.* macros Date: Tue, 6 Dec 2005 13:35:15 -0500 (EST) From: Arthur David Olson <olsona(a)elsie.nci.nih.gov> Message-ID: <200512061835.jB6IZFWH007741(a)elsie.nci.nih.gov> | ! while (isascii((unsigned char) *cp) && You sometimes do better if you write that as while (isascii(*(unsigned char *)cp) && It can also be a little clearer what you're intending - there's no intention here to fetch the char, then convert it to unsigned, all we want is the 0..255 value that cp points at. Than again, and I haven't looked at the code again just now to see if it is practical or not, but an alternative might just be to declare cp as being unsigned char * right from the start (even if that means that it needs to stop being an input parameter, and instead be copied from one which would need to remain char * to avoid changing the API). kre ps: I don't think Paul's suggested variation is really the right thing to do - it is certainly true that it's possible to test for digits by using >= '0' && <= '9' tests - but if that's the best way to write it, then that's what isdigit() ought to be doing. If you want to make it shorter, it is safe to stop the isascii() test if the arg is known to be unsigned char which after this change, it will be (or EOF, but that's irrelevant here). Paul's version may be textually shorter, but with that cp++ side effect buried in the middle of the && sequence, it is not nearly as easy to read.

3 2

proposed bad-URL changes for antarctica, australasia, and southamerica
by Arthur David Olson Dec. 8, 2005

Dec. 8, 2005

Here are changes to the antarctica, australasia, and southamerica files to document problems with some URLs. (The "chkurls" additions convince a software tool to skip checks of these URLs.) --ado ------- antarctica ------- *** /tmp/geta17431 Thu Dec 8 11:16:54 2005 --- /tmp/getb17431 Thu Dec 8 11:16:54 2005 *************** *** 1,4 **** ! # @(#)antarctica 7.25 # From Paul Eggert (1999-11-15): # To keep things manageable, we list only locations occupied year-round; see --- 1,4 ---- ! # @(#)antarctica 7.26 # From Paul Eggert (1999-11-15): # To keep things manageable, we list only locations occupied year-round; see *************** *** 59,68 **** # Australia - territories # Heard Island, McDonald Islands (uninhabited) # previously sealers and scientific personnel wintered ! # <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html"> # Margaret Turner reports # </a> (1999-09-30) that they're UTC+5, with no DST; # presumably this is when they have visitors. # # year-round bases # Casey, Bailey Peninsula, -6617+11032, since 1969 --- 59,69 ---- # Australia - territories # Heard Island, McDonald Islands (uninhabited) # previously sealers and scientific personnel wintered ! # <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html" chkurls="nocheck"> # Margaret Turner reports # </a> (1999-09-30) that they're UTC+5, with no DST; # presumably this is when they have visitors. + # [ADO: no nameserver entry for www.dstc.qut.edu.au on 2005-12-08.] # # year-round bases # Casey, Bailey Peninsula, -6617+11032, since 1969 *************** *** 139,147 **** 0 - zzz 1956 Nov 10:00 - DDUT # Dumont-d'Urville Time # Reference: ! # <a href="http://www.icair.iac.org.nz/science/reports/fr/IFRTP.html"> # Support and Development of Polar Research and Technology (1997-02-03) # </a> # Germany - year-round base --- 140,149 ---- 0 - zzz 1956 Nov 10:00 - DDUT # Dumont-d'Urville Time # Reference: ! # <a href="http://www.icair.iac.org.nz/science/reports/fr/IFRTP.html" chkurls="nocheck"> # Support and Development of Polar Research and Technology (1997-02-03) # </a> + # [ADO: no nameserver entry for www.icair.iac.org.nz on 2005-12-08.] # Germany - year-round base *************** *** 156,163 **** # # From Hideyuki Suzuki (1999-02-06): # In all Japanese stations, +0300 is used as the standard time. [See] ! # <a href="http://www.crl.go.jp/uk/uk201/basyo.htm">[reference in Japanese]</a> # and information from KAMO Hiroyasu. # # Syowa station, which is the first antarctic station of Japan, # was established on 1957-01-29. Since Syowa station is still the main --- 158,167 ---- # # From Hideyuki Suzuki (1999-02-06): # In all Japanese stations, +0300 is used as the standard time. [See] ! # <a href="http://www.crl.go.jp/uk/uk201/basyo.htm" chkurls="nocheck">[reference in Japanese]</a> # and information from KAMO Hiroyasu. + # [ADO: no nameserver entry for www.crl.go.jp on 2005-12-08; + # www.crl.co.jp may be what was meant, but page is not there either.] # # Syowa station, which is the first antarctic station of Japan, # was established on 1957-01-29. Since Syowa station is still the main ------- australasia ------- *** /tmp/geta17450 Thu Dec 8 11:16:55 2005 --- /tmp/getb17450 Thu Dec 8 11:16:55 2005 *************** *** 1,4 **** ! # @(#)australasia 7.74 # This file also includes Pacific islands. # Notes are at the end of this file --- 1,4 ---- ! # @(#)australasia 7.75 # This file also includes Pacific islands. # Notes are at the end of this file *************** *** 551,559 **** # Australia ! # <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html"> # Australia's Daylight Saving Times # </a>, by Margaret Turner, summarizes daylight saving issues in Australia. # From John Mackin (1991-03-06): # We in Australia have _never_ referred to DST as `daylight' time. --- 551,560 ---- # Australia ! # <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html" chkurls="nocheck"> # Australia's Daylight Saving Times # </a>, by Margaret Turner, summarizes daylight saving issues in Australia. + # [ADO: no nameserver entry for www.dstc.qut.edu.au on 2005-12-08.] # From John Mackin (1991-03-06): # We in Australia have _never_ referred to DST as `daylight' time. *************** *** 962,970 **** # From Paul Eggert (1999-09-27): # The Information Service of the Australian National Standards Commission ! # <a href="http://www.nsc.gov.au/InfoServ/Ileaflet/il27.htm"> # Daylight Saving # </a> page (1995-04) has an excellent overall history of Australian DST. # The Community Relations Division of the NSW Attorney General's Department # publishes a history of daylight saving in NSW. See: # <a href="http://www.lawlink.nsw.gov.au/crd.nsf/pages/time2"> --- 963,972 ---- # From Paul Eggert (1999-09-27): # The Information Service of the Australian National Standards Commission ! # <a href="http://www.nsc.gov.au/InfoServ/Ileaflet/il27.htm" chkurls="nocheck"> # Daylight Saving # </a> page (1995-04) has an excellent overall history of Australian DST. + # [ADO: no nameserver entry for www.nsc.gov.au on 2005-12-08.] # The Community Relations Division of the NSW Attorney General's Department # publishes a history of daylight saving in NSW. See: # <a href="http://www.lawlink.nsw.gov.au/crd.nsf/pages/time2"> ------- southamerica ------- *** /tmp/geta17468 Thu Dec 8 11:16:55 2005 --- /tmp/getb17468 Thu Dec 8 11:16:55 2005 *************** *** 1,4 **** ! # @(#)southamerica 7.63 # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to --- 1,4 ---- ! # @(#)southamerica 7.64 # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to *************** *** 526,535 **** # to help dealing with the shortages of electric power. # # From Paul Eggert (1998-02-25): ! # <a href="http://churchnet.ucsm.ac.uk/news/files2/news165.htm"> # Brazil Prepares for Papal Visit # </a>, # Church Net UK (1997-10-02). # # Decree 2,317 (1997-09-04), adopted by same states. Rule Brazil 1997 only - Oct 6 0:00 1:00 S --- 526,536 ---- # to help dealing with the shortages of electric power. # # From Paul Eggert (1998-02-25): ! # <a href="http://churchnet.ucsm.ac.uk/news/files2/news165.htm" chkurls="nocheck"> # Brazil Prepares for Papal Visit # </a>, # Church Net UK (1997-10-02). + # [ADO: request to churchnet.ucsm.ac.uk times out 2005-12-08.] # # Decree 2,317 (1997-09-04), adopted by same states. Rule Brazil 1997 only - Oct 6 0:00 1:00 S

2 1

proposed tz changes to eliminate electronic mail addresses
by Arthur David Olson Dec. 8, 2005

Dec. 8, 2005

Below find proposed changes to eliminate electronic mail address (except for tz.*(a)elsie.nci.nih.gov) from the time zone files. If I can believe grep, this catches them all. --ado ------- antarctica ------- *** /tmp/geta17786 Thu Dec 8 11:36:56 2005 --- /tmp/getb17786 Thu Dec 8 11:36:56 2005 *************** *** 1,4 **** ! # @(#)antarctica 7.26 # From Paul Eggert (1999-11-15): # To keep things manageable, we list only locations occupied year-round; see --- 1,4 ---- ! # @(#)antarctica 7.27 # From Paul Eggert (1999-11-15): # To keep things manageable, we list only locations occupied year-round; see *************** *** 107,113 **** # France - year-round bases # ! # From Antoine Leca <Antoine.Leca(a)Renault.FR> (1997-01-20): # Time data are from Nicole Pailleau at the IFRTP # (French Institute for Polar Research and Technology). # She confirms that French Southern Territories and Terre Adelie bases --- 107,113 ---- # France - year-round bases # ! # From Antoine Leca (1997-01-20): # Time data are from Nicole Pailleau at the IFRTP # (French Institute for Polar Research and Technology). # She confirms that French Southern Territories and Terre Adelie bases *************** *** 300,306 **** # Normally it wouldn't have a separate entry, since it's like the # larger Antarctica/McMurdo since 1970, but it's too famous to omit. # ! # From Chris Carrier <72157.3334(a)CompuServe.COM> (1996-06-27): # Siple, the first commander of the South Pole station, # stated that he would have liked to have kept GMT at the station, # but that he found it more convenient to keep GMT+12 --- 300,306 ---- # Normally it wouldn't have a separate entry, since it's like the # larger Antarctica/McMurdo since 1970, but it's too famous to omit. # ! # From Chris Carrier (1996-06-27): # Siple, the first commander of the South Pole station, # stated that he would have liked to have kept GMT at the station, # but that he found it more convenient to keep GMT+12 ------- asctime.c ------- *** /tmp/geta17805 Thu Dec 8 11:36:57 2005 --- /tmp/getb17805 Thu Dec 8 11:36:57 2005 *************** *** 1,6 **** /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson (arthur_david_olson(a)nih.gov) */ /* --- 1,6 ---- /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson. */ /* *************** *** 11,17 **** #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)asctime.c 7.31"; #endif /* !defined NOID */ #endif /* !defined lint */ --- 11,17 ---- #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)asctime.c 7.32"; #endif /* !defined NOID */ #endif /* !defined lint */ ------- asia ------- *** /tmp/geta17824 Thu Dec 8 11:36:57 2005 --- /tmp/getb17824 Thu Dec 8 11:36:57 2005 *************** *** 1,4 **** ! # @(#)asia 7.88 # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to --- 1,4 ---- ! # @(#)asia 7.89 # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to *************** *** 85,91 **** # Shanks has Yerevan switching to 3:00 (with Russian DST) in spring 1991, # then to 4:00 with no DST in fall 1995, then readopting Russian DST in 1997. # Go with Shanks, even when he disagrees with others. Edgar Der-Danieliantz ! # <edd(a)AIC.NET> reported (1996-05-04) that Yerevan probably wouldn't use DST # in 1996, though it did use DST in 1995. IATA SSIM (1991/1998) reports that # Armenia switched from 3:00 to 4:00 in 1998 and observed DST after 1991, # but started switching at 3:00s in 1998. --- 85,91 ---- # Shanks has Yerevan switching to 3:00 (with Russian DST) in spring 1991, # then to 4:00 with no DST in fall 1995, then readopting Russian DST in 1997. # Go with Shanks, even when he disagrees with others. Edgar Der-Danieliantz ! # reported (1996-05-04) that Yerevan probably wouldn't use DST # in 1996, though it did use DST in 1995. IATA SSIM (1991/1998) reports that # Armenia switched from 3:00 to 4:00 in 1998 and observed DST after 1991, # but started switching at 3:00s in 1998. ------- australasia ------- *** /tmp/geta17843 Thu Dec 8 11:36:57 2005 --- /tmp/getb17843 Thu Dec 8 11:36:57 2005 *************** *** 1,4 **** ! # @(#)australasia 7.75 # This file also includes Pacific islands. # Notes are at the end of this file --- 1,4 ---- ! # @(#)australasia 7.76 # This file also includes Pacific islands. # Notes are at the end of this file *************** *** 1050,1056 **** # Lord Howe Island # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): ! # LHI... [ Courtesy of Pauline Van Winsen.. pauline@Aus ] # [ Dec 1990 ] # Lord Howe Island is located off the New South Wales coast, and is half an # hour ahead of NSW time. --- 1050,1056 ---- # Lord Howe Island # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): ! # LHI... [ Courtesy of Pauline Van Winsen ] # [ Dec 1990 ] # Lord Howe Island is located off the New South Wales coast, and is half an # hour ahead of NSW time. *************** *** 1090,1096 **** # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): # # The Country of New Zealand (Australia's east island -) Gee they hate that! # # or is Australia the west island of N.Z. ! # # [ courtesy of Geoff Tribble.. Geofft@Aus.. Auckland N.Z. ] # # [ Nov 1990 ] # ... # Rule NZ 1974 1988 - Oct lastSun 2:00 1:00 D --- 1090,1096 ---- # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): # # The Country of New Zealand (Australia's east island -) Gee they hate that! # # or is Australia the west island of N.Z. ! # # [ courtesy of Geoff Tribble.. Auckland N.Z. ] # # [ Nov 1990 ] # ... # Rule NZ 1974 1988 - Oct lastSun 2:00 1:00 D ------- localtime.c ------- *** /tmp/geta17862 Thu Dec 8 11:36:58 2005 --- /tmp/getb17862 Thu Dec 8 11:36:58 2005 *************** *** 1,18 **** /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson (arthur_david_olson(a)nih.gov) */ #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)localtime.c 7.96"; #endif /* !defined NOID */ #endif /* !defined lint */ /* ! ** Leap second handling from Bradley White (bww(a)k.gp.cs.cmu.edu) ! ** POSIX-style TZ environment variable handling from Guy Harris ! ** (guy(a)auspex.com) */ /*LINTLIBRARY*/ --- 1,17 ---- /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson. */ #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)localtime.c 7.97"; #endif /* !defined NOID */ #endif /* !defined lint */ /* ! ** Leap second handling from Bradley White. ! ** POSIX-style TZ environment variable handling from Guy Harris. */ /*LINTLIBRARY*/ *************** *** 208,214 **** ** Except for the strftime function, these functions [asctime, ** ctime, gmtime, localtime] return values in one of two static ** objects: a broken-down time structure and an array of char. ! ** Thanks to Paul Eggert (eggert(a)twinsun.com) for noting this. */ static struct tm tm; --- 207,213 ---- ** Except for the strftime function, these functions [asctime, ** ctime, gmtime, localtime] return values in one of two static ** objects: a broken-down time structure and an array of char. ! ** Thanks to Paul Eggert for noting this. */ static struct tm tm; *************** *** 1411,1417 **** ** Adapted from code provided by Robert Elz, who writes: ** The "best" way to do mktime I think is based on an idea of Bob ** Kridle's (so its said...) from a long time ago. - ** [kridle(a)xinet.com as of 1996-01-16.] ** It does a binary search of the time_t space. Since time_t's are ** just 32 bits, its a max of 32 iterations (even at 64 bits it ** would still be very reasonable). --- 1410,1415 ---- *************** *** 1422,1428 **** #endif /* !defined WRONG */ /* ! ** Simplified normalize logic courtesy Paul Eggert (eggert(a)twinsun.com) */ static int --- 1420,1426 ---- #endif /* !defined WRONG */ /* ! ** Simplified normalize logic courtesy Paul Eggert. */ static int *************** *** 1722,1728 **** t = time2(tmp, funcp, offset, &okay); #ifdef PCTS /* ! ** PCTS code courtesy Grant Sullivan (grant(a)osf.org) */ if (okay) return t; --- 1720,1726 ---- t = time2(tmp, funcp, offset, &okay); #ifdef PCTS /* ! ** PCTS code courtesy Grant Sullivan. */ if (okay) return t; ------- private.h ------- *** /tmp/geta17881 Thu Dec 8 11:36:58 2005 --- /tmp/getb17881 Thu Dec 8 11:36:58 2005 *************** *** 4,10 **** /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson (arthur_david_olson(a)nih.gov) */ /* --- 4,10 ---- /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson. */ /* ------- tzfile.5 ------- *** /tmp/geta17900 Thu Dec 8 11:36:58 2005 --- /tmp/getb17900 Thu Dec 8 11:36:58 2005 *************** *** 133,138 **** in the file. .SH SEE ALSO newctime(3) ! .\" @(#)tzfile.5 7.11 .\" This file is in the public domain, so clarified as of ! .\" 1996-06-05 by Arthur David Olson (arthur_david_olson(a)nih.gov) --- 133,138 ---- in the file. .SH SEE ALSO newctime(3) ! .\" @(#)tzfile.5 7.12 .\" This file is in the public domain, so clarified as of ! .\" 1996-06-05 by Arthur David Olson. ------- tzfile.h ------- *** /tmp/geta17919 Thu Dec 8 11:36:59 2005 --- /tmp/getb17919 Thu Dec 8 11:36:59 2005 *************** *** 4,10 **** /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson (arthur_david_olson(a)nih.gov) */ /* --- 4,10 ---- /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson. */ /* *************** *** 21,27 **** #ifndef lint #ifndef NOID ! static char tzfilehid[] = "@(#)tzfile.h 7.17"; #endif /* !defined NOID */ #endif /* !defined lint */ --- 21,27 ---- #ifndef lint #ifndef NOID ! static char tzfilehid[] = "@(#)tzfile.h 7.18"; #endif /* !defined NOID */ #endif /* !defined lint */ *************** *** 105,111 **** #ifdef NOSOLAR /* ** Must be at least 14 for Europe/Riga as of Jan 12 1995, ! ** as noted by Earl Chew <earl(a)hpato.aus.hp.com>. */ #define TZ_MAX_TYPES 20 /* Maximum number of local time types */ #endif /* !defined NOSOLAR */ --- 105,111 ---- #ifdef NOSOLAR /* ** Must be at least 14 for Europe/Riga as of Jan 12 1995, ! ** as noted by Earl Chew. */ #define TZ_MAX_TYPES 20 /* Maximum number of local time types */ #endif /* !defined NOSOLAR */ ------- usno1989a ------- *** /tmp/geta17938 Thu Dec 8 11:36:59 2005 --- /tmp/getb17938 Thu Dec 8 11:36:59 2005 *************** *** 1,9 **** ! # @(#)usno1989a 7.3 # # From Arthur David Olson (1994-02-07): # # Here's time zone information from the United States Naval Observatory, ! # with corrections from Paul Eggert (eggert(a)twinsun.com) # The USNO warns: # DUE TO FREQUENT CHANGES IN THE LOCAL LAWS GOVERNING DAYLIGHT # SAVING TIME, WE CANNOT GUARANTEE THE ACCURACY OF THIS --- 1,9 ---- ! # @(#)usno1989a 7.4 # # From Arthur David Olson (1994-02-07): # # Here's time zone information from the United States Naval Observatory, ! # with corrections from Paul Eggert. # The USNO warns: # DUE TO FREQUENT CHANGES IN THE LOCAL LAWS GOVERNING DAYLIGHT # SAVING TIME, WE CANNOT GUARANTEE THE ACCURACY OF THIS ------- usno1995 ------- *** /tmp/geta17957 Thu Dec 8 11:36:59 2005 --- /tmp/getb17957 Thu Dec 8 11:36:59 2005 *************** *** 1,4 **** ! # @(#)usno1995 7.4 # # From Arthur David Olson (1995-12-21): # --- 1,4 ---- ! # @(#)usno1995 7.5 # # From Arthur David Olson (1995-12-21): # *************** *** 323,327 **** Zaire Shaba: +2 hours Zambia: +2 hours Zimbabwe: +2 hours ! All timezone information is non-authoritative. Send corrections to: ! res(a)tuttle.usno.navy.mil --- 323,326 ---- Zaire Shaba: +2 hours Zambia: +2 hours Zimbabwe: +2 hours ! All timezone information is non-authoritative... ------- usno1997 ------- *** /tmp/geta17976 Thu Dec 8 11:36:59 2005 --- /tmp/getb17976 Thu Dec 8 11:36:59 2005 *************** *** 1,4 **** ! # @(#)usno1997 7.6 # # From Arthur David Olson (1997-03-07): # --- 1,4 ---- ! # @(#)usno1997 7.7 # # From Arthur David Olson (1997-03-07): # *************** *** 324,328 **** Zaire Shaba: +2 hours Zambia: +2 hours Zimbabwe: +2 hours ! All timezone information is non-authoritative. ! Send corrections to: res(a)tuttle.usno.navy.mil --- 324,327 ---- Zaire Shaba: +2 hours Zambia: +2 hours Zimbabwe: +2 hours ! All timezone information is non-authoritative... ------- usno1998 ------- *** /tmp/geta17995 Thu Dec 8 11:37:00 2005 --- /tmp/getb17995 Thu Dec 8 11:37:00 2005 *************** *** 1,4 **** ! # @(#)usno1998 7.3 # # From Arthur David Olson (1998-05-26): # --- 1,4 ---- ! # @(#)usno1998 7.4 # # From Arthur David Olson (1998-05-26): # *************** *** 324,328 **** Zaire Shaba: +2 hours Zambia: +2 hours Zimbabwe: +2 hours ! All timezone information is non-authoritative. ! Send corrections to: res(a)tuttle.usno.navy.mil --- 324,327 ---- Zaire Shaba: +2 hours Zambia: +2 hours Zimbabwe: +2 hours ! All timezone information is non-authoritative... ------- zic.c ------- *** /tmp/geta18014 Thu Dec 8 11:37:00 2005 --- /tmp/getb18014 Thu Dec 8 11:37:00 2005 *************** *** 1,4 **** ! static char elsieid[] = "@(#)zic.c 7.125"; /* ** Regardless of the type of time_t, we do our work using this type. --- 1,4 ---- ! static char elsieid[] = "@(#)zic.c 7.126"; /* ** Regardless of the type of time_t, we do our work using this type. *************** *** 1648,1654 **** typecnt = 0; charcnt = 0; /* ! ** Thanks to Earl Chew (earl(a)dnd.icp.nec.com.au) ** for noting the need to unconditionally initialize startttisstd. */ startttisstd = FALSE; --- 1648,1654 ---- typecnt = 0; charcnt = 0; /* ! ** Thanks to Earl Chew ** for noting the need to unconditionally initialize startttisstd. */ startttisstd = FALSE;

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FW: FW: Re: Timezone name translations
by Olson, Arthur David (NIH/NCI) [E] Dec. 8, 2005

Dec. 8, 2005

-----Original Message----- From: Mark Davis [mailto:mark.davis@icu-project.org] Sent: Wednesday, December 07, 2005 1:05 PM To: Arthur David Olson Cc: tz(a)lecserver.nci.nih.gov Subject: Re: FW: Re: Timezone name translations Addressing the message: I would recommend using the TZIDs as is -- not try to invent new ones. You mention stability as being a concern: what we do in CLDR is to canonicalize the TZIDs for translation by choosing a particular one out of all the equivalent names (a choice we guarantee to be stable). Translating all of the TZIDs for all the languages is onerous, so for the zone identifiers in countries that only have a single zone, we leverage the country translations that we already have. We then can prioritize the translation of TZIDs that are in multizone countries. This information is then used in formatting the names, as per the following: http://www.unicode.org/draft/reports/tr35/tr35.html#Time_Zone_Fallback (This is the working draft of the next version, so modified text is in yellow). As an example of the data, see the translations in http://unicode.org/cldr/data/common/main/el.xml. Search for <territories> to see the translated country names. Search for <timeZoneNames> to see the translations for multizone countries (or particular other cases). Mark P.S. The abbreviations are ambiguous -- and not readily translated without introducing even further ambiguities -- so I would not recommend them for translation. Arthur David Olson wrote: >This message failed to make it out to the list. > > --ado > >From: Chuck Soper [chucks2(a)veladg.com] > >At 8:01 PM +0700 12/3/05, Stuart Bishop wrote: > > >>Paul Eggert wrote: >> >> > One problem with gettext format is that there might be multiple > >>translations for the same English-language abbreviation. For example, >> >> >>> "IST" is short for either Israel Standard Time or for India Standard >>>Time, and it's possible that the acronyms in (say) Russian would be >>>different. Hence gettext("IST") might not work as the user would >>>expect, in a Russian locale. >>> >>> >>This is a problem even without localization. But I won't be tackling >>abbreviations anyway - it would involve first mapping and translating >>each historical period in each timezone to an English sentence to cope >>with the duplicate abbreviations and the patalogical cases like >>Australian Eastern Standard Time and Australian Eastern Daylight >>Savings Time (still breaking code to this day). >> >> > >I'm interested in the display of time zone names both in English and localized. It seems like trying to provide a time zone name for each tzID (std/dst) might be fairly laborious because there are almost 400 tzIDs (in the zone.tab file). I'm considering building a time zone name table based time on abbreviations and UTC offsets. Each row in the table could have a tz abbreviation, a UTC offset and a time zone name. For example, one row could contain CET, UTC+1 and 'Central European Standard Time'. There are 34 tzIDs that use CET at UTC+1 during some time of the year. Instead of trying to maintain 34 tz names for 34 tzIDs why not maintain one tz name for an abbreviation and a UTC offset? Another example is Argentina. Doesn't Argentina have two tz names for its 10 tzIDs? For localized tz names, additional tables would be created. > >I understand that an abbreviation by itself is not unique (e.g. IST, EST, etc.), but the combination of an abbreviation and a UTC offset might be unique. Does anyone know if the abbreviation/UTC offset combination is unique? Clearly, tzIDs are unique, but they're not very stable and there are a lot of them. > >I believe that the abbreviation/UTC offset combination actually holds more information than a tzID. For example, PWT/UTC-7 (during World War II) could display Pacific War Time. The tzID by itself does not contain that information. Also, using only the tzID might produce some unneeded names if names are created tzID/dst combinations that do not exist. > >I'm interested to find out if people think this approach might be effective for building and maintaining a list of time zone names. > >Chuck > > > > > >

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changes to zdump.c and zic.c invocations of is.* macros
by Arthur David Olson Dec. 6, 2005

Dec. 6, 2005

Below are proposed changes to zic.c and zdump.c to avoid compiler warnings about invocations of the is.* macros, to meet standard requirements for calling the macros, and to make the invocations consistent. I plan to deal with gettext issues in the next round of changes. --ado ------- zic.c ------- *** /tmp/geta6691 Tue Dec 6 11:01:47 2005 --- /tmp/getb6691 Tue Dec 6 11:01:47 2005 *************** *** 1,4 **** ! static char elsieid[] = "@(#)zic.c 7.124"; /* ** Regardless of the type of time_t, we do our work using this type. --- 1,4 ---- ! static char elsieid[] = "@(#)zic.c 7.125"; /* ** Regardless of the type of time_t, we do our work using this type. *************** *** 2046,2053 **** emalloc((int) ((strlen(cp) + 1) * sizeof *array)); nsubs = 0; for ( ; ; ) { ! while (isascii(*cp) && isspace((unsigned char) *cp)) ! ++cp; if (*cp == '\0' || *cp == '#') break; array[nsubs++] = dp = cp; --- 2046,2054 ---- emalloc((int) ((strlen(cp) + 1) * sizeof *array)); nsubs = 0; for ( ; ; ) { ! while (isascii((unsigned char) *cp) && ! isspace((unsigned char) *cp)) ! ++cp; if (*cp == '\0' || *cp == '#') break; array[nsubs++] = dp = cp; *************** *** 2210,2217 **** */ cp = string; wp = NULL; ! while (isascii(*cp) && isalpha(*cp)) ! ++cp; if (cp - string == 0) wp = _("time zone abbreviation lacks alphabetic at start"); if (noise && cp - string > 3) --- 2211,2219 ---- */ cp = string; wp = NULL; ! while (isascii((unsigned char) *cp) && ! isalpha((unsigned char) *cp)) ! ++cp; if (cp - string == 0) wp = _("time zone abbreviation lacks alphabetic at start"); if (noise && cp - string > 3) *************** *** 2220,2228 **** wp = _("time zone abbreviation has too many alphabetics"); if (wp == NULL && (*cp == '+' || *cp == '-')) { ++cp; ! if (isascii(*cp) && isdigit(*cp)) ! if (*cp++ == '1' && *cp >= '0' && *cp <= '4') ! ++cp; } if (*cp != '\0') wp = _("time zone abbreviation differs from POSIX standard"); --- 2222,2232 ---- wp = _("time zone abbreviation has too many alphabetics"); if (wp == NULL && (*cp == '+' || *cp == '-')) { ++cp; ! if (isascii((unsigned char) *cp) && ! isdigit((unsigned char) *cp)) ! if (*cp++ == '1' && ! *cp >= '0' && *cp <= '4') ! ++cp; } if (*cp != '\0') wp = _("time zone abbreviation differs from POSIX standard"); ------- zdump.c ------- *** /tmp/geta6709 Tue Dec 6 11:01:48 2005 --- /tmp/getb6709 Tue Dec 6 11:01:48 2005 *************** *** 1,4 **** ! static char elsieid[] = "@(#)zdump.c 7.70"; /* ** This code has been made independent of the rest of the time --- 1,4 ---- ! static char elsieid[] = "@(#)zdump.c 7.71"; /* ** This code has been made independent of the rest of the time *************** *** 209,215 **** return; cp = abbrp; wp = NULL; ! while (isascii(*cp) && isalpha(*cp)) ++cp; if (cp - abbrp == 0) wp = _("lacks alphabetic at start"); --- 209,215 ---- return; cp = abbrp; wp = NULL; ! while (isascii((unsigned char) *cp) && isalpha((unsigned char) *cp)) ++cp; if (cp - abbrp == 0) wp = _("lacks alphabetic at start"); *************** *** 219,227 **** wp = _("has more than 6 alphabetics"); if (wp == NULL && (*cp == '+' || *cp == '-')) { ++cp; ! if (isascii(*cp) && isdigit(*cp)) ! if (*cp++ == '1' && *cp >= '0' && *cp <= '4') ! ++cp; } if (*cp != '\0') wp = _("differs from POSIX standard"); --- 219,228 ---- wp = _("has more than 6 alphabetics"); if (wp == NULL && (*cp == '+' || *cp == '-')) { ++cp; ! if (isascii((unsigned char) *cp) && ! isdigit((unsigned char) *cp)) ! if (*cp++ == '1' && *cp >= '0' && *cp <= '4') ! ++cp; } if (*cp != '\0') wp = _("differs from POSIX standard");

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FW: Re: Timezone name translations
by Arthur David Olson Dec. 6, 2005

Dec. 6, 2005

This message failed to make it out to the list. --ado From: Chuck Soper [chucks2(a)veladg.com] At 8:01 PM +0700 12/3/05, Stuart Bishop wrote: >Paul Eggert wrote: > > > One problem with gettext format is that there might be multiple > > translations for the same English-language abbreviation. For example, >> "IST" is short for either Israel Standard Time or for India Standard >> Time, and it's possible that the acronyms in (say) Russian would be >> different. Hence gettext("IST") might not work as the user would >> expect, in a Russian locale. > >This is a problem even without localization. But I won't be tackling >abbreviations anyway - it would involve first mapping and translating >each historical period in each timezone to an English sentence to cope >with the duplicate abbreviations and the patalogical cases like >Australian Eastern Standard Time and Australian Eastern Daylight >Savings Time (still breaking code to this day). I'm interested in the display of time zone names both in English and localized. It seems like trying to provide a time zone name for each tzID (std/dst) might be fairly laborious because there are almost 400 tzIDs (in the zone.tab file). I'm considering building a time zone name table based time on abbreviations and UTC offsets. Each row in the table could have a tz abbreviation, a UTC offset and a time zone name. For example, one row could contain CET, UTC+1 and 'Central European Standard Time'. There are 34 tzIDs that use CET at UTC+1 during some time of the year. Instead of trying to maintain 34 tz names for 34 tzIDs why not maintain one tz name for an abbreviation and a UTC offset? Another example is Argentina. Doesn't Argentina have two tz names for its 10 tzIDs? For localized tz names, additional tables would be created. I understand that an abbreviation by itself is not unique (e.g. IST, EST, etc.), but the combination of an abbreviation and a UTC offset might be unique. Does anyone know if the abbreviation/UTC offset combination is unique? Clearly, tzIDs are unique, but they're not very stable and there are a lot of them. I believe that the abbreviation/UTC offset combination actually holds more information than a tzID. For example, PWT/UTC-7 (during World War II) could display Pacific War Time. The tzID by itself does not contain that information. Also, using only the tzID might produce some unneeded names if names are created tzID/dst combinations that do not exist. I'm interested to find out if people think this approach might be effective for building and maintaining a list of time zone names. Chuck

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Re: Timezone name translations
by Paul Eggert Dec. 6, 2005

Dec. 6, 2005

Chuck Soper <chucks2(a)veladg.com> writes: > Does anyone know if the abbreviation/UTC offset combination is > unique? I wouldn't count on it. Does "PST" mean "Pacific Standard Time" or "Pitcairn Standard Time"? They're both 8 hours behind UTC. Or, if you want something a bit more obscure, "LMT" at 36 minutes and 32 seconds behind UTC can mean either "Local Mean Time" or "Lisbon Mean Time", depending on the zone and year. Neither of these examples are of major economic importance right now, but they do indicate the assumption isn't safe.

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RE: Tzcode2005p.tar.gz and tzdata2005p.tar.gz
by Olson, Arthur David (NIH/NCI) [E] Dec. 5, 2005

Dec. 5, 2005

Thanks; I'll incorporate that in the next round. --ado -----Original Message----- From: Paul Eggert [mailto:eggert@CS.UCLA.EDU] Sent: Monday, December 05, 2005 4:34 PM To: Olson, Arthur David (NIH/NCI) [E] Cc: tz(a)elsie.nci.nih.gov Subject: Re: Tzcode2005p.tar.gz and tzdata2005p.tar.gz I suggest the following one-line comment change to the systemv file, the next time it gets published. It addresses two issues. First, the "before" in the old comment is backwards, as the US DST changes occurred after (not before) the old System V rules were written. Second, we now have two sets of US changes (1987 and 2007), not one, so the comment shouldn't imply that the 1987 changes were the only ones. --- systemv 2005/11/29 19:04:59 2005.16 +++ systemv 2005/12/05 21:29:02 2005.16.0.1 @@ -4,7 +4,7 @@ # No attempt is made to handle Newfoundland, since it cannot be expressed # using the System V "TZ" scheme (half-hour offset), or anything outside # North America (no support for non-standard DST start/end dates), nor -# the change in the DST rules in the US in 1987 (which occurred before +# the changes in the DST rules in the US after 1976 (which occurred after # the old rules were written). # # If you need the old rules, uncomment ## lines.

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