[tz] tz Digest, Vol 34, Issue 19
Alexander Borg
alexander.borg at astrodata.com
Thu Sep 24 13:50:16 UTC 2015
Hi all there,
I'm responding to a mail which is more than an year old. Anyway, I don't
understand why you combine zones like
+Link Africa/Abidjan Africa/Freetown # Sierra Leone
thus throwing away valuable pre-1970 DST and Zone data.
I understand that you cannot incoreporate all historical data in 'tzdata',
especially the USA and France would be impossible without creating
virtually hundreds of additional zones. But in the case above I don't
understand why you don't keep the data.
Best regards,
Alexander Borg
-----Ursprüngliche Nachricht-----
Von: tz-bounces at iana.org [mailto:tz-bounces at iana.org] Im Auftrag von
tz-request at iana.org
Gesendet: Mittwoch, 9. Juli 2014 22:42
An: tz at iana.org
Betreff: tz Digest, Vol 34, Issue 19
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Today's Topics:
1. Daylight saving time in Egypt (newsgroups at engine2.net)
2. Re: Daylight saving time in Egypt (Paul Eggert)
3. Re: [PATCH] Replace some zones with links when that doesn't
lose useful info. (Paul Eggert)
4. [PATCH] Replace Africa zones with links when that doesn't
lose useful info. (Paul Eggert)
5. Re: [PATCH] Replace some zones with links when that doesn't
lose useful info. (Stephen Colebourne)
----------------------------------------------------------------------
Message: 1
Date: Wed, 09 Jul 2014 14:03:33 +0200
From: newsgroups at engine2.net
To: tz at iana.org
Subject: [tz] Daylight saving time in Egypt
Message-ID: <7cdeb5930cc17d073dea6796cc571719 at engine2.net>
Content-Type: text/plain; charset=UTF-8; format=flowed
Hi everyone,
I search through messages and couldn't find if this information was
already sent or not.
It seems that there will be a change in daylight saving time in Egypt
according to NOTAM (notice to airmen) issued by NOAA (below) which was
sent to us with this comment:
FOR THE KIND ATTENTION OF OUR VALUABLE CUSTOMERS BELOW NOTAM ISSUED TO
ANNOUNCE THAT STARTING 31July2014 AT 2200 GMT , CLOCK IN EGYPT WILL BE GMT
PLUS 3 HOURS PLEASE RELAY MESSAGE TO THE CONCENED PARTIES
NOTAM content:
A0237/14 NOTAMN
Q) HECC/QXXXX/IV/NBO/A/000/999/2721N03009E005
A) HECC B) 1407312200 C) 1409252100
E) SUMMER TIME (UTC+3 HOURS) WILL BE STARTED AS ITEM B.
CREATED: 02 Jul 2014 13:28:00
SOURCE: HECAYNYX
Source:
https://www.notams.faa.gov/
Best regards,
Michal Konvalinka
engine2.net
------------------------------
Message: 2
Date: Wed, 09 Jul 2014 07:38:22 -0700
From: Paul Eggert <eggert at cs.ucla.edu>
To: newsgroups at engine2.net, tz at iana.org
Subject: Re: [tz] Daylight saving time in Egypt
Message-ID: <53BD53DE.6060203 at cs.ucla.edu>
Content-Type: text/plain; charset=UTF-8; format=flowed
newsgroups at engine2.net wrote:
> It seems that there will be a change in daylight saving time in Egypt
> according to NOTAM (notice to airmen) issued by NOAA
Thank. As of release 2014e the tz database has that transition, along
with Morocco's similar transition on August 2 at 02:00 local time. We
also have guesses for similar transitions in 2015 through 2038; though
there's little doubt these guesses will be wrong, they're better than any
of the other guesses we could come up with.
------------------------------
Message: 3
Date: Wed, 09 Jul 2014 08:16:12 -0700
From: Paul Eggert <eggert at cs.ucla.edu>
To: Stephen Colebourne <scolebourne at joda.org>, Time zone mailing list
<tz at iana.org>
Subject: Re: [tz] [PATCH] Replace some zones with links when that
doesn't lose useful info.
Message-ID: <53BD5CBC.90401 at cs.ucla.edu>
Content-Type: text/plain; charset=UTF-8; format=flowed
Stephen Colebourne wrote:
> As we have discussed before, changes like this are disruptive to many
> people. The LMT and early time values are used out there, irrespective
> of their accuracy.
It was discussed at some length, and to some extent we're just repeating
that discussion now. There's one thing new, though: we now have had
significant practical experience. The earlier set of changes along these
lines was published in release 2013e (2013-09-19), and it hasn't caused
significant disruption in the field. In practice it seems that end users
don't much care about things like the time zone of Guadeloupe in 1899 --
which is probably a good thing, since the pre-2013e database was wrong
anyway.
I understand that simplifying away spurious pre-1970 timestamps can cause
more work for detailed regression testing, but that kind of work should be
routine as the tz database is always mutating for other reasons anyway.
Besides, the tail should not be wagging the dog here:
regression testing should be our servant, not our master.
------------------------------
Message: 4
Date: Wed, 9 Jul 2014 12:44:55 -0700
From: Paul Eggert <eggert at cs.ucla.edu>
To: Time zone mailing list <tz at iana.org>
Subject: [tz] [PATCH] Replace Africa zones with links when that
doesn't lose useful info.
Message-ID: <1404935095-13779-1-git-send-email-eggert at cs.ucla.edu>
Content-Type: text/plain; charset=UTF-8
* 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.
---
NEWS | 20 +++--
africa | 266
++++++++++++++++++++-----------------------------------------
antarctica | 5 +-
3 files changed, 104 insertions(+), 187 deletions(-)
diff --git a/NEWS b/NEWS
index 222f91e..429b89e 100644
--- a/NEWS
+++ b/NEWS
@@ -61,11 +61,21 @@ Unreleased, experimental changes
Some zones have been turned into links, when they differed from
existing
zones only for older UTC offsets where the data were likely invented.
These changes affect UTC offsets in pre-1970 time stamps only. This
is
- similar to the change in release 2013e, except this time for the
Pacific.
- The affected zones are: Antarctica/DumontDUrville, Pacific/Chuuk,
- Pacific/Funafuti, Pacific/Majuro, Pacific/Midway, Pacific/Palau,
- Pacific/Pohnpei, Pacific/Saipan, Pacific/Tahiti, Pacific/Wake, and
- Pacific/Wallis.
+ similar to the change in release 2013e, except this time for Africa
and
+ the Pacific. The affected zones are: Africa/Accra,
Africa/Addis_Ababa,
+ Africa/Asmara, Africa/Bamako, Africa/Bangui, Africa/Banjul,
+ Africa/Blantyre, Africa/Brazzaville, Africa/Bujumbura,
Africa/Conakry,
+ Africa/Dakar, Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Douala,
+ Africa/Freetown, Africa/Gaborone, Africa/Harare, Africa/Kampala,
+ Africa/Kigali, Africa/Kinshasa, Africa/Libreville, Africa/Lome,
+ Africa/Luanda, Africa/Lubumbashi, Africa/Lusaka, Africa/Malabo,
+ Africa/Maputo, Africa/Maseru, Africa/Mbabane, Africa/Mogadishu,
+ Africa/Niamey, Africa/Nouakchott, Africa/Ouagadougou,
Africa/Porto-Novo,
+ Africa/Sao_Tome, Antarctica/DumontDUrville, Antarctica/Syowa,
+ Atlantic/St_Helena, Indian/Antananarivo, Indian/Comoro,
Indian/Mayotte,
+ Pacific/Chuuk, Pacific/Funafuti, Pacific/Majuro, Pacific/Midway,
+ Pacific/Palau, Pacific/Pohnpei, Pacific/Saipan, Pacific/Tahiti,
+ Pacific/Wake, and Pacific/Wallis.
Asia/Shanghai's pre-standard-time UT offset has been changed from
8:05:57 to 8:05:43, the location of Xujiahui Observatory. Its diff
--git a/africa b/africa index 3d84d9b..678cde2 100644
--- a/africa
+++ b/africa
@@ -64,7 +64,6 @@
# 3:00 CAST Central Africa Summer Time (no longer used)
# 3:00 SAST South Africa Summer Time (no longer used)
# 3:00 EAT East Africa Time
-# 4:00 EAST East Africa Summer Time (no longer used)
# Algeria
# Rule NAME FROM TO TYPE IN ON AT SAVE
LETTER/S
@@ -105,45 +104,21 @@ Zone Africa/Algiers 0:12:12 - LMT
1891 Mar 15 0:01
1:00 - CET
# Angola
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Luanda 0:52:56 - LMT 1892
- 0:52:04 - AOT 1911 May 26 # Angola Time
- 1:00 - WAT
-
# Benin
-# Whitman says they switched to 1:00 in 1946, not 1934; -# go with Shanks
& Pottenger.
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Porto-Novo 0:10:28 - LMT 1912
- 0:00 - GMT 1934 Feb 26
- 1:00 - WAT
+# See Africa/Lagos.
# Botswana
-# From Paul Eggert (2013-02-21):
-# Milne says they were regulated by the Cape Town Signal in 1899; -#
assume they switched to 2:00 when Cape Town did.
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Gaborone 1:43:40 - LMT 1885
- 1:30 - SAST 1903 Mar
- 2:00 - CAT 1943 Sep 19 2:00
- 2:00 1:00 CAST 1944 Mar 19 2:00
- 2:00 - CAT
+# Milne says they were regulated by the Cape Town Signal in 1899.
+# See Africa/Johannesburg.
# Burkina Faso
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Ouagadougou -0:06:04 - LMT 1912
- 0:00 - GMT
+# See Africa/Abidjan.
# Burundi
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Bujumbura 1:57:28 - LMT 1890
- 2:00 - CAT
+# See Africa/Johannesburg.
# Cameroon
-# Whitman says they switched to 1:00 in 1920; go with Shanks & Pottenger.
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Douala 0:38:48 - LMT 1912
- 1:00 - WAT
+# See Africa/Lagos.
# Cape Verde
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
@@ -154,9 +129,7 @@ Zone Atlantic/Cape_Verde -1:34:04 - LMT 1907
# Praia
-1:00 - CVT
# Central African Republic
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Bangui 1:14:20 - LMT 1912
- 1:00 - WAT
+# See Africa/Lagos.
# Chad
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
@@ -166,31 +139,33 @@ Zone Africa/Ndjamena 1:00:12 - LMT
1912 # N'Djamena
1:00 - WAT
# Comoros
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Indian/Comoro 2:53:04 - LMT 1911 Jul # Moroni, Gran
Comoro
- 3:00 - EAT
+# See Africa/Nairobi.
# Democratic Republic of Congo
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Kinshasa 1:01:12 - LMT 1897 Nov 9
- 1:00 - WAT
-Zone Africa/Lubumbashi 1:49:52 - LMT 1897 Nov 9
- 2:00 - CAT
+# See Africa/Lagos for the western part of the country.
+# See Africa/Johannesburg for the eastern part of the country.
# Republic of the Congo
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Brazzaville 1:01:08 - LMT 1912
- 1:00 - WAT
+# See Africa/Lagos.
# C?te D'Ivoire / Ivory Coast
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Africa/Abidjan -0:16:08 - LMT 1912
0:00 - GMT
+Link Africa/Abidjan Africa/Accra # Ghana
+Link Africa/Abidjan Africa/Bamako # Mali
+Link Africa/Abidjan Africa/Banjul # Gambia
+Link Africa/Abidjan Africa/Conakry # Guinea
+Link Africa/Abidjan Africa/Dakar # Senegal
+Link Africa/Abidjan Africa/Freetown # Sierra Leone
+Link Africa/Abidjan Africa/Lome # Togo
+Link Africa/Abidjan Africa/Nouakchott # Mauritania
+Link Africa/Abidjan Africa/Ouagadougou # Burkina Faso
+Link Africa/Abidjan Africa/Sao_Tome # S?o Tom? and Pr?ncipe
+Link Africa/Abidjan Atlantic/St_Helena # St Helena
# Djibouti
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Djibouti 2:52:36 - LMT 1911 Jul
- 3:00 - EAT
+# See Africa/Nairobi.
##########################################################################
#####
@@ -400,56 +375,32 @@ Zone Africa/Cairo 2:05:09 - LMT
1900 Oct
2:00 Egypt EE%sT
# Equatorial Guinea
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Malabo 0:35:08 - LMT 1912
- 0:00 - GMT 1963 Dec 15
- 1:00 - WAT
+# See Africa/Lagos.
# Eritrea
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Asmara 2:35:32 - LMT 1870
- 2:35:32 - AMT 1890 # Asmara
Mean Time
- 2:35:20 - ADMT 1936 May 5 # Adis Dera
MT
- 3:00 - EAT
+# See Africa/Nairobi.
# Ethiopia
-# From Paul Eggert (2006-03-22):
-# Shanks & Pottenger write that Ethiopia had six narrowly-spaced time
zones -# between 1870 and 1890, and that they merged to 38E50 (2:35:20) in
1890.
-# We'll guess that 38E50 is for Adis Dera.
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Addis_Ababa 2:34:48 - LMT 1870
- 2:35:20 - ADMT 1936 May 5 # Adis Dera
MT
- 3:00 - EAT
+# From Paul Eggert (2014-07-09):
+# Like the Swahili of Kenya and Tanzania, many Ethiopians keep a #
+12-hour clock starting at our 06:00, so their "8 o'clock" is our #
+02:00 or 14:00. Keep this in mind when you ask the time in Amharic.
+#
+# Shanks & Pottenger write that Ethiopia had six narrowly-spaced time #
+zones between 1870 and 1890, that they merged to 38E50 (2:35:20) in #
+1890, and that they switched to 3:00 on 1936-05-05. Perhaps 38E50 #
+was for Adis Dera. Ignore this for now as it predates our 1970 #
+cutoff, and it's quite likely wrong anyway.
+#
+# See Africa/Nairobi.
# Gabon
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Libreville 0:37:48 - LMT 1912
- 1:00 - WAT
+# See Africa/Lagos.
# Gambia
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Banjul -1:06:36 - LMT 1912
- -1:06:36 - BMT 1935 # Banjul Mean Time
- -1:00 - WAT 1964
- 0:00 - GMT
-
# Ghana
-# Rule NAME FROM TO TYPE IN ON AT SAVE
LETTER/S
-# Whitman says DST was observed from 1931 to "the present"; -# go with
Shanks & Pottenger.
-Rule Ghana 1936 1942 - Sep 1 0:00 0:20
GHST
-Rule Ghana 1936 1942 - Dec 31 0:00 0
GMT
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Accra -0:00:52 - LMT 1918
- 0:00 Ghana %s
-
# Guinea
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Conakry -0:54:52 - LMT 1912
- 0:00 - GMT 1934 Feb 26
- -1:00 - WAT 1960
- 0:00 - GMT
+# See Africa/Abidjan.
# Guinea-Bissau
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
@@ -464,13 +415,19 @@ Zone Africa/Nairobi 2:27:16 - LMT
1928 Jul
2:30 - BEAT 1940
2:45 - BEAUT 1960
3:00 - EAT
+Link Africa/Nairobi Africa/Addis_Ababa # Ethiopia
+Link Africa/Nairobi Africa/Asmara # Eritrea
+Link Africa/Nairobi Africa/Dar_es_Salaam # Tanzania Link Africa/Nairobi
+Africa/Djibouti
+Link Africa/Nairobi Africa/Kampala # Uganda
+Link Africa/Nairobi Africa/Mogadishu # Somalia
+Link Africa/Nairobi Antarctica/Syowa
+Link Africa/Nairobi Indian/Antananarivo # Madagascar
+Link Africa/Nairobi Indian/Comoro
+Link Africa/Nairobi Indian/Mayotte
# Lesotho
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Maseru 1:50:00 - LMT 1903 Mar
- 2:00 - SAST 1943 Sep 19 2:00
- 2:00 1:00 SAST 1944 Mar 19 2:00
- 2:00 - SAST
+# See Africa/Johannesburg.
# Liberia
# From Paul Eggert (2006-03-22):
@@ -545,30 +502,14 @@ Zone Africa/Tripoli 0:52:44 - LMT
1920
2:00 - EET
# Madagascar
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Indian/Antananarivo 3:10:04 - LMT 1911 Jul
- 3:00 - EAT 1954 Feb 27 23:00s
- 3:00 1:00 EAST 1954 May 29 23:00s
- 3:00 - EAT
+# See Africa/Nairobi.
# Malawi
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Blantyre 2:20:00 - LMT 1903 Mar
- 2:00 - CAT
+# See Africa/Johannesburg.
# Mali
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Bamako -0:32:00 - LMT 1912
- 0:00 - GMT 1934 Feb 26
- -1:00 - WAT 1960 Jun 20
- 0:00 - GMT
-
# Mauritania
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Nouakchott -1:03:48 - LMT 1912
- 0:00 - GMT 1934 Feb 26
- -1:00 - WAT 1960 Nov 28
- 0:00 - GMT
+# See Africa/Abidjan.
# Mauritius
@@ -665,8 +606,7 @@ Zone Indian/Mauritius 3:50:00 - LMT
1907 # Port Louis
# Mayotte
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Indian/Mayotte 3:00:56 - LMT 1911 Jul #
Mamoutzou
- 3:00 - EAT
+# See Africa/Nairobi.
# Morocco
# See the 'europe' file for Spanish Morocco (Africa/Ceuta).
@@ -964,9 +904,7 @@ Zone Africa/El_Aaiun -0:52:48 - LMT
1934 Jan # El Aai?n
0:00 Morocco WE%sT
# Mozambique
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Maputo 2:10:20 - LMT 1903 Mar
- 2:00 - CAT
+# See Africa/Johannesburg.
# Namibia
# The 1994-04-03 transition is from Shanks & Pottenger.
@@ -998,16 +936,21 @@ Zone Africa/Windhoek 1:08:24 - LMT
1892 Feb 8
1:00 Namibia WA%sT
# Niger
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Niamey 0:08:28 - LMT 1912
- -1:00 - WAT 1934 Feb 26
- 0:00 - GMT 1960
- 1:00 - WAT
+# See Africa/Lagos.
# Nigeria
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Africa/Lagos 0:13:36 - LMT 1919 Sep
1:00 - WAT
+Link Africa/Lagos Africa/Bangui # Central African Republic
+Link Africa/Lagos Africa/Brazzaville # Rep. of the Congo
+Link Africa/Lagos Africa/Douala # Cameroon
+Link Africa/Lagos Africa/Kinshasa # W Dem. Rep. of the Congo
+Link Africa/Lagos Africa/Libreville # Gabon
+Link Africa/Lagos Africa/Luanda # Angola
+Link Africa/Lagos Africa/Malabo # Equatorial Guinea
+Link Africa/Lagos Africa/Niamey # Niger
+Link Africa/Lagos Africa/Porto-Novo # Benin
# R?union
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
@@ -1028,16 +971,11 @@ Link Indian/Reunion Indian/Alfred_Faure # Tromelin
- inhabited until at least 1958
# Rwanda
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Kigali 2:00:16 - LMT 1935 Jun
- 2:00 - CAT
+# See Africa/Johannesburg.
# St Helena
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Atlantic/St_Helena -0:22:48 - LMT 1890 #
Jamestown
- -0:22:48 - JMT 1951 # Jamestown Mean
Time
- 0:00 - GMT
-# The other parts of the St Helena territory are similar:
+# See Africa/Abidjan.
+# The parts of the St Helena territory are similar:
# Tristan da Cunha: on GMT, say Whitman and the CIA
# Ascension: on GMT, say the USNO (1995-12-21) and the CIA
# Gough (scientific station since 1955; sealers wintered
previously):
@@ -1045,16 +983,8 @@ Zone Atlantic/St_Helena -0:22:48 - LMT
1890 # Jamestown
# Inaccessible, Nightingale: uninhabited
# S?o Tom? and Pr?ncipe
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Sao_Tome 0:26:56 - LMT 1884
- -0:36:32 - LMT 1912 # Lisbon Mean Time
- 0:00 - GMT
-
# Senegal
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Dakar -1:09:44 - LMT 1912
- -1:00 - WAT 1941 Jun
- 0:00 - GMT
+# See Africa/Abidjan.
# Seychelles
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
@@ -1068,24 +998,10 @@ Zone Indian/Mahe 3:41:48 - LMT
1906 Jun # Victoria
# Possibly the islands were uninhabited.
# Sierra Leone
-# Rule NAME FROM TO TYPE IN ON AT SAVE
LETTER/S
-# Whitman gives Mar 31 - Aug 31 for 1931 on; go with Shanks & Pottenger.
-Rule SL 1935 1942 - Jun 1 0:00 0:40
SLST
-Rule SL 1935 1942 - Oct 1 0:00 0
WAT
-Rule SL 1957 1962 - Jun 1 0:00 1:00
SLST
-Rule SL 1957 1962 - Sep 1 0:00 0
GMT
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Freetown -0:53:00 - LMT 1882
- -0:53:00 - FMT 1913 Jun # Freetown Mean
Time
- -1:00 SL %s 1957
- 0:00 SL %s
+# See Africa/Abidjan.
# Somalia
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Mogadishu 3:01:28 - LMT 1893 Nov
- 3:00 - EAT 1931
- 2:30 - BEAT 1957
- 3:00 - EAT
+# See Africa/Nairobi.
# South Africa
# Rule NAME FROM TO TYPE IN ON AT SAVE
LETTER/S
@@ -1095,6 +1011,17 @@ Rule SA 1943 1944 - Mar
Sun>=15 2:00 0 -
Zone Africa/Johannesburg 1:52:00 - LMT 1892 Feb 8
1:30 - SAST 1903 Mar
2:00 SA SAST
+Link Africa/Johannesburg Africa/Blantyre # Malawi
+Link Africa/Johannesburg Africa/Bujumbura # Burundi
+Link Africa/Johannesburg Africa/Gaborone # Botswana
+Link Africa/Johannesburg Africa/Harare # Zimbabwe
+Link Africa/Johannesburg Africa/Kigali # Rwanda
+Link Africa/Johannesburg Africa/Lubumbashi # E Dem. Rep. of Congo
+Link Africa/Johannesburg Africa/Lusaka # Zambia
+Link Africa/Johannesburg Africa/Maputo # Mozambique
+Link Africa/Johannesburg Africa/Maseru # Lesotho
+Link Africa/Johannesburg Africa/Mbabane # Swaziland
+#
# Marion and Prince Edward Is
# scientific station since 1947
# no information
@@ -1122,21 +1049,13 @@ Zone Africa/Khartoum 2:10:08 - LMT
1931
Link Africa/Khartoum Africa/Juba
# Swaziland
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Mbabane 2:04:24 - LMT 1903 Mar
- 2:00 - SAST
+# See Africa/Johannesburg.
# Tanzania
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Dar_es_Salaam 2:37:08 - LMT 1931
- 3:00 - EAT 1948
- 2:45 - BEAUT 1961
- 3:00 - EAT
+# See Africa/Nairobi.
# Togo
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Lome 0:04:52 - LMT 1893
- 0:00 - GMT
+# See Africa/Abidjan.
# Tunisia
@@ -1239,19 +1158,8 @@ Zone Africa/Tunis 0:40:44 - LMT
1881 May 12
1:00 Tunisia CE%sT
# Uganda
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Kampala 2:09:40 - LMT 1928 Jul
- 3:00 - EAT 1930
- 2:30 - BEAT 1948
- 2:45 - BEAUT 1957
- 3:00 - EAT
+# See Africa/Nairobi.
# Zambia
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Lusaka 1:53:08 - LMT 1903 Mar
- 2:00 - CAT
-
# Zimbabwe
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Africa/Harare 2:04:12 - LMT 1903 Mar
- 2:00 - CAT
+# See Africa/Johannesburg.
diff --git a/antarctica b/antarctica
index 16aedaa..38720a8 100644
--- a/antarctica
+++ b/antarctica
@@ -207,12 +207,11 @@ Zone Indian/Kerguelen 0 - zzz
1950 # Port-aux-Fran?ais
# 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.
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Antarctica/Syowa 0 - zzz 1957 Jan 29
- 3:00 - SYOT # Syowa Time
# See:
# NIPR Antarctic Research Activities (1999-08-17) #
<http://www.nipr.ac.jp/english/ara01.html>
+#
+# See Africa/Nairobi.
# S Korea - year-round base
# Jang Bogo, Terra Nova Bay, -743700+1641205 since 2014
--
1.9.1
------------------------------
Message: 5
Date: Wed, 9 Jul 2014 21:41:33 +0100
From: Stephen Colebourne <scolebourne at joda.org>
To: Time zone mailing list <tz at iana.org>
Subject: Re: [tz] [PATCH] Replace some zones with links when that
doesn't lose useful info.
Message-ID:
<CACzrW9AyEwA+oT-+QvHHVxc4eOVUwdQ4eA3BMtNKX3+qhQrwdQ at mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
On 9 July 2014 16:16, Paul Eggert <eggert at cs.ucla.edu> wrote:
> Stephen Colebourne wrote:
>>
>> As we have discussed before, changes like this are disruptive to many
>> people. The LMT and early time values are used out there, irrespective
>> of their accuracy.
>
> It was discussed at some length, and to some extent we're just repeating
> that discussion now. There's one thing new, though: we now have had
> significant practical experience. The earlier set of changes along
these
> lines was published in release 2013e (2013-09-19), and it hasn't caused
> significant disruption in the field. In practice it seems that end
users
> don't much care about things like the time zone of Guadeloupe in 1899 --
> which is probably a good thing, since the pre-2013e database was wrong
> anyway.
Well it seems that you're going to make the change no matter what, so
talking about it does feel rather futile. Its no surprise that
changing relatively minor locations results in few issues. Nor is it a
surprise that this list wouldn't hear of any issues, because its so
far from end users. I can guarantee that the data you have and are
planning to destroy is in somebodies database somewhere as both
Joda-Time and Java SE 8 expose the full data right back to and
including LMT to all users for all zones.
As I said last time, the issue isn't removing wrong values, its about
replacing them with even more wrong ones. The LMT values in
particular, which used to have some meaning, now do not. If you had
proposed an alternate way to define LMT values (which were based on
the actual city location) then I might be less frustrated. Instead we
are back to taking a sledgehammer to data that wasn't causing anyone
any harm, replacing it with data that is clearly worse.
<shakes head in despair>
Stephen
------------------------------
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