- tz - lists.iana.org

[time zone problem about 2017c]
by Zhouyuxiang Nov. 2, 2017

Nov. 2, 2017

Dear all: Hello. I'm a user of time zone data in IANA. Lately I found a problem when I used it in Android O system. external\icu\tools\update-tzdata.py I used the tool in the below path to deal with the data tzcode2017c.tar.gz<https://www.iana.org/time-zones/repository/releases/tzcode2017c.tar.gz>. Then the error occurred. Finally I found the way to solve it. It seemed that africa file and backzone file have a duplicated data: # South Sudan Zone Africa/Juba 2:06:24 - LMT 1931 2:00 Sudan CA%sT 2000 Jan 15 12:00 3:00 - EAT I deleted one in backzone, then it worked. Now I'm wondering if this is mistake. And what are the influences?

2 1

Data loss on FTP Server
by Nathan Winters Nov. 1, 2017

Nov. 1, 2017

Hello, I've been using the FTP server to access Timezone Info for a while now and it seems the directory I was using (/tz/data) has lost all of its files. Additionally, I'm unable to view the data for the most recent release ( tzdb-2017c/ <ftp://ftp.iana.org/tz/tzdb-2017c/>). Has anything changed recently? Thanks, Nate

13 24

[PROPOSED] Guess that Tonga has canceled DST
by Paul Eggert Nov. 1, 2017

Nov. 1, 2017

(Thanks to David Wade.) * NEWS, australasia (Tonga): Guess DST has been canceled. --- NEWS | 6 ++++++ australasia | 14 ++++++++++++-- 2 files changed, 18 insertions(+), 2 deletions(-) diff --git a/NEWS b/NEWS index 4e98ef7..28b46b8 100644 --- a/NEWS +++ b/NEWS @@ -7,6 +7,7 @@ Unreleased, experimental changes Fiji ends DST 2018-01-14, not 2018-01-21. Namibia switches from +01/+02 to +02 on 2018-04-01. Sudan switches from +03 to +02 on 2017-11-01. + Tonga likely switches from +13/+14 to +13 on 2017-11-05. Turks & Caicos switches from -04 to -05/-04 on 2018-11-04. A new file tzdata.zi now holds a small text copy of all data. The zic input format has been regularized slightly. @@ -28,6 +29,11 @@ Unreleased, experimental changes Atyya and Yahia Abdalla.) South Sudan is not switching, so Africa/Juba is no longer a link to Africa/Khartoum. + Tonga has likely ended its experiment with DST, and will not + adjust its clocks on 2017-11-05. Although Tonga has not announced + whether it will continue to observe DST, the IATA is assuming that + it will not. (Thanks to David Wade.) + Turks & Caicos will switch from -04 all year to -05 with US DST on 2018-03-11 at 03:00. This affects UT offsets starting 2018-11-04 at 02:00. (Thanks to Steffen Thorsen.) diff --git a/australasia b/australasia index ae2cd72..5f7c86d 100644 --- a/australasia +++ b/australasia @@ -704,8 +704,8 @@ Rule Tonga 1999 only - Oct 7 2:00s 1:00 S Rule Tonga 2000 only - Mar 19 2:00s 0 - Rule Tonga 2000 2001 - Nov Sun>=1 2:00 1:00 S Rule Tonga 2001 2002 - Jan lastSun 2:00 0 - -Rule Tonga 2016 max - Nov Sun>=1 2:00 1:00 S -Rule Tonga 2017 max - Jan Sun>=15 3:00 0 - +Rule Tonga 2016 only - Nov Sun>=1 2:00 1:00 S +Rule Tonga 2017 only - Jan Sun>=15 3:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Tongatapu 12:19:20 - LMT 1901 12:20 - +1220 1941 @@ -1626,6 +1626,7 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # day in 2011. Assume also that the Samoas follow the US and New # Zealand's "ST"/"DT" style of daylight-saving abbreviations. + # Tonga # From Paul Eggert (1996-01-22): @@ -1720,6 +1721,15 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # Assume Tonga will observe DST from the first Sunday in November at 02:00 # through the third Sunday in January at 03:00, like Fiji, for now. +# From David Wade (2017-10-18): +# In August government was disolved by the King. The current prime minister +# continued in office in care taker mode. It is easy to see that few +# decisions will be made until elections 16th November. +# +# From Paul Eggert (2017-10-18): +# For now, guess that DST is discontinued. That's what the IATA is guessing. + + # Wake # From Vernice Anderson, Personal Secretary to Philip Jessup, -- 2.13.6

4 3

The misaligned borders of South Australia
by Gilmore Davidson Nov. 1, 2017

Nov. 1, 2017

An interesting piece of trivia/history popped up in the news today. The borders of South Australia (and hence the boundaries of some Australian time zones) look like straight lines on most maps, but have some kinks in them. Most notably for this mailing list, part of the eastern border is misaligned due to an incorrect timekeeping reference from GMT. http://www.abc.net.au/news/2017-11-01/why-south-australias-borders-are-anyt… <http://www.abc.net.au/news/2017-11-01/why-south-australias-borders-are-anyt…> > It was meant to run along the 141st meridian line of longitude. > But longitude is measured with time references to Greenwich Mean Time — and watches were not that great in the 1800s. > The result was a 3.6-kilometre gap where the borders were meant to have met. > > "Fundamentally the difference came down to a discrepancy that the nation had at the time," Mr Burdett said. > "The longitude that had been determined for Fort Macquarie [Australia's reference point] was out by two minutes. > "Hence ours was out by two minutes and the discrepancy ended up in that border." Cheers, Gil

1 0

Turks & Caicos to resume DST; details unclear
by Paul Eggert Oct. 31, 2017

Oct. 31, 2017

According to an article published in the Bahamas website Magnetic Media, the cabinet of Turks & Caicos decided on Thursday to resume the practice of daylight saving time starting in 2018. The article does not give enough details to update the database (it confuses summer with winter time, among other things). My guess is that Turks & Caicos will revert to its pre-2015 practice of staying in sync with New York, which means that tzdb's predictions for its UTC offsets will become wrong in November 2018, and the abbreviations and tm_isdst flag will become wrong some time between March and November 2018 (although the article implies April, this could well be an error). When the cabinet and/or the Turks & Caicos Weekly News get around to publishing the details of the decision, we should be able to update tzdb to reflect this change with some accuracy. Gordon Z. PDM to reinstate Daylight Savings Time. Magnetic Media 2017-07-20. http://magneticmediatv.com/2017/07/pdm-to-reinstate-daylight-savings-time/ ("PDM" is the People's Democratic Movement.)

4 4

A bill to move Polish time (Europe/Warsaw) permanently to UTC+2
by Sergiusz Wolicki Oct. 29, 2017

Oct. 29, 2017

An internal committee of the Polish parlament (Sejm) has unanimously voted in favor of a bill to stop DST changes and to introduce permanent Central European Summer Time (GMT+2). The law would come in force in autumn 2018. The bill still needs to be voted by Sejm, then Senat (upper house), and then must be signed by the President, so it is far from being the actual law. The bill is not considered conflicting with EU regulations, which only require DST changes to be synchronized across EU but do not actually mandate the use of DST. Reference in Polish: http://wiadomosci.gazeta.pl/wiadomosci/7,114883,22499682,nie-bedziemy-przes… The website <http://sejm.gov.pl/Sejm8.nsf/PrzebiegProc.xsp?nr=1852> of the Sejm has not yet been updated with the result of the voting. Thanks, Sergiusz

7 7

Bug in Latest Release of TZ Database ie 2017c
by Sahil Sethi Oct. 28, 2017

Oct. 28, 2017

Hi Team As decided by Sudan Government to change time zone from GMT+3 to GMT+2, we were testing TZ update from 2017b --> 2017c and we encountered the following error : Linux TZ version : 2017b --> 2017c ... Failed | "backzone", line 149: duplicate zone name Africa/Juba (file "africa", line 1107) | "backzone", line 150: input line of unknown type | "backzone", line 151: input line of unknown type On little debugging we found that in former version there was a link between Africa/Khartoum & Africa/Juba zones in africa file and Africa/Juba zone entry existed in "backzone" file but in later version same zone entry of Africa/Juba exists in both files ie "africa" & "backzone", causing trouble. Looking forward for an acknowledgement. Regards Sahil Sethi Sr Software Engineer GlogbalLogic, India

2 1

2017c zdump outputs "No such file or directory"
by 大山俊成 Oct. 27, 2017

Oct. 27, 2017

Hi, Previously, I tryed 2017b like the following. make TOPDIR=$HOME/tzdir install $HOME/tzdir/etc/zdump -v America/Los_Angeles It works good . Now I tryed 2017c as the same way. make TOPDIR=$HOME/tzdir install $HOME/tzdir/etc/zdump -v America/Los_Angeles But , zdump outputs "America/Los_Angeles: No such file or Directory" Something wrong with me?

3 7

why do Africa/Juba and backzone/Africa/Juba differ?
by Michael Deckers Oct. 24, 2017

Oct. 24, 2017

Puzzles me in 2017c: Africa/Juba and backzone/Africa/Juba differ in their astronomical longitudes: in zone1970.tab: SS +0451+03137 Africa/Juba in zone.tab: SS +0451+03136 Africa/Juba and (correspondingly) in the local mean time used before the switch to zone time in 1931: in africa: Zone Africa/Juba 2:06:28 - LMT 1931 in backzone: Zone Africa/Juba 2:06:24 - LMT 1931 Why? And do we need the backzone entry at all? Michael Deckers. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

2 1

Anyone else having snprintf issues with 2017c?
by Jon Skeet Oct. 24, 2017

Oct. 24, 2017

The tzvalidate <https://github.com/nodatime/tzvalidate> travis build is failing, with both clang and gcc, with this error: zdump.c:803:1: error: static declaration of ‘snprintf’ follows non-static declaration snprintf(char *s, size_t size, char const *format, ...) ^ make: *** [zdump.o] Error 1 It's building fine for me locally, so I'm not quite sure what's wrong. We're currently building on trusty - I may try another distro... The snprintf changes were introduced on June 13th <https://github.com/eggert/tz/commit/399180580f65bcad63cf996997068366cadaf53…>. It's been too long since I've done a lot of C to easily work out what's going on. I'll investigate further myself tomorrow, but I thought I'd just see if anyone else had seen this before then. Jon

7 9