July 2022 - tz - lists.iana.org

Re: [tz] Fixing GeoNames timezone error
by Kerry Shetline July 19, 2022

July 19, 2022

I’ll post a more detailed comment on GitHub later, and link to my own code where I’m trying to use your boundaries to solve some of these issues. For the example of Walpole Island, Ontario, when I try to find a zone that contains the lat/long of this location, I oddly get the match for America/Nigipon rather than America/Toronto (at least it’s not America/Detroit, as GeoNames has it). I get several matches, in fact, for America/Nigipon that don’t make sense, given that this zone should have a very small area. I’m using the @turf/turf npm library to parse the shape files, and booleanPointInPolygon() to check if a particular zone contains a specific lat/long point. > Evan Siroky <evan.siroky(a)yahoo.com> writes: > > Hello, > I'm the maintainer of?https://github.com/evansiroky/timezone-boundary-builder?which is a project that?extracts data from Open Street Map (OSM) to build shape files of the boundaries of the world's timezones. If you find inaccuracies with the data generated from this project, I'd love to know about these problems. Feel free to submit an issue in the GitHub project noting any problem that you see. > Evan

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Re: [tz] [PROPOSED] New file tzdata.zi for text-format tzdata
by Dot T July 12, 2022

July 12, 2022

With a few exceptions, all files in the tz code and data (including this one) are in the public domain. The exceptions are date.c, newstrftime.3, and strftime.c, which contain material derived from BSD and which use the BSD 3-clause license.

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Re: [tz] [PROPOSED] New file tzdata.zi for text-format tzdata
by Dot T July 12, 2022

July 12, 2022

With a few exceptions, all files in the tz code and data (including this one) are in the public domain. The exceptions are date.c, newstrftime.3, and strftime.c, which contain material derived from BSD and which use the BSD 3-clause license.

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[PROPOSED 1/5] * zic.8: fix minus typo
by Paul Eggert July 12, 2022

July 12, 2022

--- zic.8 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/zic.8 b/zic.8 index 0cd0781..e8816e5 100644 --- a/zic.8 +++ b/zic.8 @@ -145,7 +145,7 @@ outputs data intended only for nonnegative timestamps that fit into 31-bit signed integers. On platforms with GNU .BR date , -.q "zic \-r @$(date +%s)" +.q "zic \*-r @$(date +%s)" omits data intended for past timestamps. Although this option typically reduces the output file's size, the size can increase due to the need to represent the timestamp range -- 2.34.1

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[PATCH] Add -R option to zic
by Paul Eggert July 12, 2022

July 12, 2022

(Need suggested by Almaz Mingaleev.) * NEWS, zic.8: Document option. * zic.c (usage): Mention new option. (redundant_time): New static var. (redundant_time_option): New function. (main, writezone, outzone): Support -R. --- NEWS | 4 ++++ zic.8 | 11 +++++++++++ zic.c | 44 +++++++++++++++++++++++++++++++++++++++++--- 3 files changed, 56 insertions(+), 3 deletions(-) diff --git a/NEWS b/NEWS index 60deee4..850e38b 100644 --- a/NEWS +++ b/NEWS @@ -5,6 +5,7 @@ Unreleased, experimental changes Briefly: Iran no longer observes DST after 2022. Rename Europe/Kiev to Europe/Kyiv. + New zic -R option Changes to future timestamps @@ -38,6 +39,9 @@ Unreleased, experimental changes Changes to code + zic has a new option '-R @N' to output explicit transitions < N. + (Need suggested by Almaz Mingaleev.) + 'zic -r @N' no longer outputs bad data when N < first transition. (Problem introduced in 2021d and reported by Peter Krefting.) diff --git a/zic.8 b/zic.8 index 3f228a6..0cd0781 100644 --- a/zic.8 +++ b/zic.8 @@ -159,6 +159,17 @@ Also see the .B "\*-b slim" option for another way to shrink output size. .TP +.BI "\*-R @" hi +Generate redundant trailing explicit transitions for timestamps +that occur less than +.I hi +seconds since the Epoch, even though the transitions could be +more concisely represented via the extended POSIX TZ string. +This option does not affect the represented timestamps. +Although it accommodates nonstandard TZif readers +that ignore the extended POSIX TZ string, +it increases the size of the altered output files. +.TP .BI "\*-t " file When creating local time information, put the configuration link in the named file rather than in the standard location. diff --git a/zic.c b/zic.c index 19e145a..e081c3d 100644 --- a/zic.c +++ b/zic.c @@ -579,7 +579,8 @@ usage(FILE *stream, int status) _("%s: usage is %s [ --version ] [ --help ] [ -v ] \\\n" "\t[ -b {slim|fat} ] [ -d directory ] [ -l localtime ]" " [ -L leapseconds ] \\\n" - "\t[ -p posixrules ] [ -r '[@lo][/@hi]' ] [ -t localtime-link ] \\\n" + "\t[ -p posixrules ] [ -r '[@lo][/@hi]' ] [ -R '@hi' ] \\\n" + "\t[ -t localtime-link ] \\\n" "\t[ filename ... ]\n\n" "Report bugs to %s.\n"), progname, progname, REPORT_BUGS_TO); @@ -681,6 +682,9 @@ static zic_t const max_time = MAXVAL(zic_t, TIME_T_BITS_IN_FILE); static zic_t lo_time = MINVAL(zic_t, TIME_T_BITS_IN_FILE); static zic_t hi_time = MAXVAL(zic_t, TIME_T_BITS_IN_FILE); +/* The time specified by the -R option, defaulting to MIN_TIME. */ +static zic_t redundant_time = MINVAL(zic_t, TIME_T_BITS_IN_FILE); + /* The time specified by an Expires line, or negative if no such line. */ static zic_t leapexpires = -1; @@ -712,6 +716,22 @@ timerange_option(char *timerange) return true; } +/* Generate redundant time stamps up to OPT. Return true if successful. */ +static bool +redundant_time_option(char *opt) +{ + if (*opt == '@') { + intmax_t redundant; + char *opt_end; + redundant = strtoimax(opt + 1, &opt_end, 10); + if (opt_end != opt + 1 && !*opt_end) { + redundant_time = max(redundant_time, redundant); + return true; + } + } + return false; +} + static const char * psxrules; static const char * lcltime; static const char * directory; @@ -764,7 +784,8 @@ main(int argc, char **argv) } else if (strcmp(argv[k], "--help") == 0) { usage(stdout, EXIT_SUCCESS); } - while ((c = getopt(argc, argv, "b:d:l:L:p:r:st:vy:")) != EOF && c != -1) + while ((c = getopt(argc, argv, "b:d:l:L:p:r:R:st:vy:")) != EOF + && c != -1) switch (c) { default: usage(stderr, EXIT_FAILURE); @@ -851,12 +872,23 @@ _("%s: invalid time range: %s\n"), } timerange_given = true; break; + case 'R': + if (! redundant_time_option(optarg)) { + fprintf(stderr, _("%s: invalid time: %s\n"), + progname, optarg); + return EXIT_FAILURE; + } + break; case 's': warning(_("-s ignored")); break; } if (optind == argc - 1 && strcmp(argv[optind], "=") == 0) usage(stderr, EXIT_FAILURE); /* usage message by request */ + if (hi_time + (hi_time < ZIC_MAX) < redundant_time) { + fprintf(stderr, _("%s: -R time exceeds -r cutoff\n"), progname); + return EXIT_FAILURE; + } if (bloat == 0) { static char const bloat_default[] = ZIC_BLOAT_DEFAULT; if (strcmp(bloat_default, "slim") == 0) @@ -2139,7 +2171,10 @@ writezone(const char *const name, const char *const string, char version, rangeall.defaulttype = defaulttype; rangeall.count = timecnt; rangeall.leapcount = leapcnt; - range64 = limitrange(rangeall, lo_time, hi_time, ats, types); + range64 = limitrange(rangeall, lo_time, + max(hi_time, + redundant_time - (ZIC_MIN < redundant_time)), + ats, types); range32 = limitrange(range64, INT32_MIN, INT32_MAX, ats, types); /* TZif version 4 is needed if a no-op transition is appended to @@ -2893,6 +2928,8 @@ outzone(const struct zone *zpfirst, ptrdiff_t zonecount) max_year = min_year + years_of_observations; } } + max_year = max(max_year, (redundant_time / (SECSPERDAY * DAYSPERNYEAR) + + EPOCH_YEAR + 1)); max_year0 = max_year; if (want_bloat()) { /* For the benefit of older systems, @@ -3061,6 +3098,7 @@ outzone(const struct zone *zpfirst, ptrdiff_t zonecount) offset = oadd(zp->z_stdoff, rp->r_save); if (!want_bloat() && !useuntil && !do_extend && prevrp && lo_time <= prevktime + && redundant_time <= ktime && rp->r_hiyear == ZIC_MAX && prevrp->r_hiyear == ZIC_MAX) break; -- 2.34.1

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to Pierre Cashon
by Petro Ordynskyi July 12, 2022

July 12, 2022

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Moderation note 2
by Petro Ordynskyi July 12, 2022

July 12, 2022

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Timezone error (Kyiv not Kiev)
by Yana Sukhoversha July 12, 2022

July 12, 2022

Dear Sirs and Madams, I've noticed the Timezone error , the correct spelling according to orthographic rules is Kyiv not Kiev. I hope this accidental mistake will be amended urgently , taking into consideration Ukrainian-Russian relations nowadays as well as your strive to improvement and lightning-fast response to error corrections Hope to see the correct variant Kyiv very soon Sincerely, *Yana Sukhoversha*

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Moderation note
by Kim Davies July 12, 2022

July 12, 2022

We have temporarily introduced some moderation controls in light of the repetitive and externally coordinated nature of the Kyiv naming requests being sent to this group. This is not a measure we take lightly. Continuous restatement of the same talking points and casting aspersions at people's motives does not advance productive discussion and drives well intentioned participants away. I would encourage all participants to not relitigate the same arguments back and forth that are now very familiar to list members. It is useful to consider ICANN's expected standards of behavior which can be reviewed at https://www.icann.org/resources/pages/expected-standards-2016-06-28-en kim -- Kim Davies VP, IANA Services, ICANN President, PTI

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Why Kyiv has not been changed yet?
by Artur Nakonia July 10, 2022

July 10, 2022

Hello, What is the problem with Kyiv? Why it is still as Kiev? Thank you, Artur Nakonia

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