Add the product of the longitude difference and the cosine of the
latitude farther from the equator to the distance measure. This
works better for the Congolese test case noted by Alan Barrett in:
http://mm.icann.org/pipermail/tz/2014-July/021229.html
The new heuristic is not perfect, but no heuristic is.
* tzselect.ksh (abs, min): New functions
(convert_coord): Rename local to avoid name clash.
(gcdist): Rename from dist.
(pardist, dist): New functions.
* NEWS: Document this.
(Thanks to Alan Barrett for the suggestion.)
* Makefile (SOURCES): Move workman.sh here, from $(MISC).
(COMMON): Move NEWS here, from $(DOCS).
(tzdata$(VERSION).tar.gz): Move $(MISC) here, from
tzcode$(VERSION).tar.gz.
* NEWS: Document the above.
* Makefile (check_white_space): Rename from check_tabs; all uses
changed. Also check for trailing white space and for oddball
ASCII white space characters.
(Thanks to Stephen Colebourne for a heads-up about the decree.)
* africa (Africa/Luanda, Africa/Bissau):
Change transition date to 1912-01-01.
(Atlantic/Cape_Verde, Africa/Maputo):
Add commentary about the switch.
* asia (Asia/Kolkata): Add commentary about Portuguese India.
* europe (Europe/Lisbon): Change Lisbon Mean Time from -0:36:32
to -0:36:45 (rounded from -0:36:44.68).
(Atlantic/Azores, Atlantic/Madeira):
Change transition date to 1912-01-01.
* NEWS: Document the above.
* asia (Dhaka): Replace 23:59 with 24:00 to align match supporting
commentary, now that zic can handle it.
(Pakistan): Merge two rules that can be covered as one.
* northamerica (Mont): Simplify rules per existing commentary, since zic
has been able to handle this since 1998.
* NEWS: Document this.
* tz-art.htm: The joke in the "Outsourced" episode may correctly exploit
the time difference between New York and San Francisco, but meanwhile,
they got the corresponding time in Mumbai totally wrong.
In particular, this patch is makes the commentary more systematic
about preferring "time zone" to "timezone" except when quoting someone
else or when talking about code that uses "timezone".
This harmless bug was introduced in release 2014f, which distributed
leapseconds.awk in both the code and the data tarballs.
It's code, so it should be in the code tarball.
* Makefile (DATA): Omit leapseconds.awk.
(check_character_set): Omit redundant check of $(LEAP_DEPS).
(Thanks to Vladimir Karpinsky.)
* asia (Asia/Tbilisi, Asia/Samarkand):
* europe (Europe/Riga, Europe/Samara, Asia/Yekaterinburg, Asia/Omsk)
(Asia/Krasnoyarsk, Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok):
Match Byalokoz 1919 better.
* NEWS: Document the above.
This should better address concerns about large-scale changes.
We can do the rest of these changes later, as they're not urgent.
* backward (Africa/Asmera, Asia/Saigon): Restore old links.
* checktab.awk (tztab): Handle zones that should probably be
turned into links some day.
* africa (Africa/Luanda, Africa/Porto-Novo, Africa/Gaborone)
(Africa/Bujumbura, Africa/Douala, Africa/Bangui, Indian/Comoro)
(Africa/Kinshasa, Africa/Lubumbashi, Africa/Brazzaville)
(Africa/Djibouti, Africa/Malabo, Africa/Asmara, Africa/Addis_Ababa)
(Africa/Libreville, Africa/Maseru, Indian/Antananarivo)
(Africa/Blantyre, Indian/Mayotte, Africa/Niamey, Africa/Kigali)
(Africa/Mogadishu, Africa/Mbabane, Africa/Dar_es_Salaam)
(Africa/Kampala, Africa/Lusaka, Africa/Harare):
* asia (Asia/Bahrain, Asia/Phnom_Penh, Asia/Kuwait)
(Asia/Vientiane, Asia/Muscat, Asia/Ho_Chi_Minh, Asia/Aden):
* australasia (Pacific/Saipan, Pacific/Midway):
* northamerica, southamerica (America/Antigua, America/Cayman):
New zones, restoring 2014e data. Corresponding links removed.
* NEWS: Document the above.
* NEWS: Russian change of 2014-10-26 is now official; removes verbal hedge.
* europe (Asia/Omsk): Fixes typos in commentary.
* tz-art.htm: Fuller sources for "Friends" and "Frasier" quotes, a few other
typos.
It allows multiple country codes per zone. Switch code and data to
use the new format, along with the recently-added Crozet Islands entry.
The old zone.tab file is still installed but is deprecated.
The new file uses UTF-8; add commentary saying that iso3166.tab is
planned to change to UTF-8.
* Theory, tzselect.8 (FILES): zone.tab -> time.tab.
* africa (Indian/Alfred_Faure): Remove link.
* antarctica: Mention Possession Island in comments.
* checktab.awk: Add support for checking time.tab.
* iso3166.tab: Mention planned switch to UTF-8.
Update ISO 3166-1 Newsletter from VI-15 to VI-16.
* time.tab: New file.
* tzselect.ksh (zonetabtype): New variable.
Add undocumented -t option, meant for developer testing.
(TZ_ZONE_TABLE): Use zonetabtype.
(output_distances, countries, regions, TZ): Support time.tab format.
(quoted_continents, distance_table, countries, regions)
(TZ, TZ_for_date): Quote shell strings more carefully.
* zone.tab: Refer to time.tab for detailed comments about format.
(Indian/Alfred_Faure): Remove.
* Makefile (TIMETABLES): New macro.
(TABDATA, install, check_tables): Use it.
(check_character_set, check_tables): Check time.tab too.
(check_time_t_alternatives): Use time.tab, not zone.tab.
* NEWS: Document the above.
* northamerica (America/Metlakatla): Use the more-common "PST"
rather than our invented "MeST" for the abbreviation. Our source
called it "Pacific Time", as did a contemporaneous news report,
and I couldn't find contemporaneous use of "MeST" or of
"Metlakatla Time". Cite the news report in the commentary,
and quote some Juneau graffiti.
* zone.tab (America/Resolute): Call it Central Time, not Central
Standard Time, since it observes DST now.
(America/Metlakatla): Call it Pacific Standard Time, not
Metlakatla Time. Mention that it's in Alaska.
* NEWS: Document the above.
Revert zone-to-link changes that changed current time zone
abbreviations. Add a few more changes, for more consistency.
Make several other fixes discovered while researching this.
* africa (Africa/Accra, Antarctica/Syowa):
* asia (Pacific/Palau):
* australasia (Pacific/Funafuti, Pacific/Majuro, Pacific/Wake)
(Pacific/Wallis, Antarctica/DumontDUrville, Pacific/Chuuk)
(Pacific/Pohnpei):
* northamerica (Pacific/Tahiti):
Remove links, as they are now zones again.
* africa (Africa/Accra, Africa/Maputo):
* antarctica (Antarctica/DumontDUrville, Antarctica/Syowa):
* australasia (Pacific/Tahiti, Pacific/Majuro, Pacific/Chuuk)
(Pacific/Pohnpei, Pacific/Palau, Pacific/Funafuti, Pacific/Wake)
(Pacific/Wallis):
Restore zone.
* africa (Africa/Accra): Assume DST starting in 1920, as per Scott
Keltie & Epstein 1920.
* asia (Asia/Bahrain, Asia/Phnom_Penh, Asia/Kuwait, Asia/Vientiane)
(Asia/Muscat, Asia/Ho_Chi_Minh, Asia/Aden):
* northamerica (America/Antigua, America/Cayman):
Change from zone to link, as these are also closely related.
* africa (Africa/Blantyre, Africa/Bujumbura, Africa/Gaborone)
(Africa/Harare, Africa/Kigali, Africa/Lubumbashi, Africa/Lusaka):
Now links to Africa/Maputo, not Africa/Johannesburg.
* asia (Asia/Riyadh): Change standard-time transition from 1950
to 1947-03-14. Add commentary citing Hunt 1961 and CAB 1946.
* australasia (Pacific/Chatham): Assume NZST - 45 min. before 1946.
Add commentary about this.
(Pacific/Pago_Pago): UT-11 from 1911 to 1950.
(WS, Pacific/Apia): Use NZ-style abbreviations.
Switch to "WSST" for Western Samoa standard time before 1950.
Add commentary about Samoa before 1950.
* backward (Africa/Asmera, Africa/Timbuktu, Asia/Saigon):
Redo to avoid link-to-link.
* europe (Hungary, Europe/Bucharest): Several pre-1946
corrections: in 1918 the transition out of DST was on 09-16, not
09-29; in 1919 it was on 11-24, not 09-15; in 1945 it was on
11-01, not 11-03; in 1941 the transition to DST was 04-08 not
04-06 at 02:00; and there was no DST in 1920.
(Poland): Add source for 1919.
* southamerica: Add link for America/Antigua.
* NEWS: Document the above. Add some thanks.
* africa (Africa/Luanda, Africa/Porto-Novo, Africa/Gaborone)
(Africa/Ouagadougou, Africa/Bujumbura, Africa/Douala, Africa/Bangui)
(Indian/Comoro, Africa/Kinshasa, Africa/Lubumbashi, Africa/Brazzaville)
(Africa/Djibouti, Africa/Malabo, Africa/Asmara, Africa/Addis_Ababa)
(Africa/Libreville, Africa/Banjul, Africa/Accra, Africa/Conakry)
(Africa/Maseru, Indian/Antananarivo, Africa/Blantyre, Africa/Bamako)
(Africa/Nouakchott, Indian/Mayotte, Africa/Maputo, Africa/Niamey)
(Africa/Kigali, Atlantic/St_Helena, Africa/Sao_Tome, Africa/Dakar)
(Africa/Freetown, Africa/Mogadishu, Africa/Mbabane, Africa/Dar_es_Salaam)
(Africa/Lome, Africa/Kampala, Africa/Lusaka, Africa/Harare):
* antarctica (Antarctica/Syowa):
Remove zone, replacing each with a link to a region that has had
the same UTC offset since 1970.
* NEWS: Document this.
This is like the 2013-09-02 change, but for the Pacific this time.
* antarctica (Antarctica/DumontDUrville):
* australasia (Pacific/Tahiti, Pacific/Saipan, Pacific/Majuro)
(Pacific/Chuuk, Pacific/Pohnpei, Pacific/Palau, Pacific/Funafuti)
(Pacific/Midway, Pacific/Wake, Pacific/Wallis):
Remove zone, replacing each with a link to a region that has had
the same UTC offset since 1970. This removes data that were
largely invented, either by us or almost surely by Shanks or his
sources.
* asia, australasia, northamerica: Create links accordingly.
* NEWS: Document this.
(Thanks to Vladimir Karpinsky for the Moscow corrections.)
Other corrections are taken from Milne 1899.
* asia (Asia/Tbilisi): Change LMT from 2:59:16 to 2:59:06.
(Asia/Tashkent): Change LMT from 4:37:12 to 4:37:11.
* europe (Europe/Helsinki): Change LMT from 1:39:52 to 1:39:49.
(Europe/Riga): Change LMT from 1:36:24 to 1:36:28.
(Europe/Moscow): Change LMT from 2:30:20 to 2:30:17.
Change 1916/9 time from 2:30:48 to 2:31:19.
(Asia/Yekaterinburg): Change LMT from 4:02:24 to 4:02:33.
(Asia/Irkutsk): Change LMT from 6:57:20 to 6:57:15.
(Asia/Vladivostok): Change LMT from 8:47:44 to 8:47:34.
* zone.tab (Europe/Moscow): Use Kilometer 0 point.
* NEWS: Document this.
