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[PROPOSED 1/2] Update IDL commentary
by Paul Eggert Jan. 25, 2023

Jan. 25, 2023

--- australasia | 36 +++++++++++++++--------------------- 1 file changed, 15 insertions(+), 21 deletions(-) diff --git a/australasia b/australasia index 749b72c8..84d94b99 100644 --- a/australasia +++ b/australasia @@ -2199,24 +2199,18 @@ Zone Pacific/Efate 11:13:16 - LMT 1912 Jan 13 # Vila # an international standard, there are some places on the high seas where the # correct date is ambiguous. -# From Wikipedia <https://en.wikipedia.org/wiki/Time_zone> (2005-08-31): -# Before 1920, all ships kept local apparent time on the high seas by setting -# their clocks at night or at the morning sight so that, given the ship's -# speed and direction, it would be 12 o'clock when the Sun crossed the ship's -# meridian (12 o'clock = local apparent noon). During 1917, at the -# Anglo-French Conference on Time-keeping at Sea, it was recommended that all -# ships, both military and civilian, should adopt hourly standard time zones -# on the high seas. Whenever a ship was within the territorial waters of any -# nation it would use that nation's standard time. The captain was permitted -# to change his ship's clocks at a time of his choice following his ship's -# entry into another zone time - he often chose midnight. These zones were -# adopted by all major fleets between 1920 and 1925 but not by many -# independent merchant ships until World War II. - -# From Paul Eggert, using references suggested by Oscar van Vlijmen -# (2005-03-20): -# -# The American Practical Navigator (2002) -# http://pollux.nss.nima.mil/pubs/pubs_j_apn_sections.html?rid=187 -# talks only about the 180-degree meridian with respect to ships in -# international waters; it ignores the international date line. +# From Wikipedia <https://en.wikipedia.org/wiki/Nautical_time> (2023-01-23): +# The nautical time zone system is analogous to the terrestrial time zone +# system for use on high seas. Under the system time changes are required for +# changes of longitude in one-hour steps. The one-hour step corresponds to a +# time zone width of 15° longitude. The 15° gore that is offset from GMT or +# UT1 (not UTC) by twelve hours is bisected by the nautical date line into two +# 7°30' gores that differ from GMT by ±12 hours. A nautical date line is +# implied but not explicitly drawn on time zone maps. It follows the 180th +# meridian except where it is interrupted by territorial waters adjacent to +# land, forming gaps: it is a pole-to-pole dashed line. + +# From Paul Eggert (2023-01-23): +# The American Practical Navigator <https://msi.nga.mil/Publications/APN>, +# 2019 edition, merely says that the International Date Line +# "coincides with the 180th meridian over most of its length." -- 2.37.2

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[PROPOSED 1/4] Allow “§” etc. in commentary
by Paul Eggert Jan. 24, 2023

Jan. 24, 2023

* Makefile (UNUSUAL_OK_LATIN_1): Allow all non-alphabetic, non-ASCII printable characters that are Latin-1. This is primarily for “§” and we might as well allow them all since even XEmacs 21 supports them all. --- Makefile | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/Makefile b/Makefile index 721a7452..17e3bb57 100644 --- a/Makefile +++ b/Makefile @@ -459,9 +459,10 @@ SAFE_CHARSET3= 'abcdefghijklmnopqrstuvwxyz{|}~' SAFE_CHARSET= $(SAFE_CHARSET1)$(SAFE_CHARSET2)$(SAFE_CHARSET3) SAFE_CHAR= '[]'$(SAFE_CHARSET)'-]' -# These characters are Latin-1, and so are likely to be displayable -# even in editors with limited character sets. -UNUSUAL_OK_LATIN_1 = «°±»½¾× +# These non-alphabetic, non-ASCII printable characters are Latin-1, +# and so are likely displayable even in editors like XEmacs 21 +# that have limited character sets. +UNUSUAL_OK_LATIN_1 = ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿×÷ # This IPA symbol is represented in Unicode as the composition of # U+0075 and U+032F, and U+032F is not considered alphabetic by some # grep implementations that do not grok composition. -- 2.37.2

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No leap second on 2023-06-30
by Tim Parenti Jan. 21, 2023

Jan. 21, 2023

Per IERS, Bulletin C 65 (2023-01-09) https://hpiers.obspm.fr/iers/bul/bulc/bulletinc.65 …and forwarded below. A patch updating leap-seconds.list from NIST is attached, and is installed in the development repository. -- Tim Parenti ---------- Forwarded message --------- From: IERS EOP Product Center <iers.eoppc(a)obspm.fr> Date: Mon, 9 Jan 2023 at 05:36 Subject: Bulletin C number 65 To: <bulc.iers(a)obspm.fr> INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE SERVICE DE LA ROTATION TERRESTRE DE L'IERS OBSERVATOIRE DE PARIS 61, Av. de l'Observatoire 75014 PARIS (France) Tel. : +33 1 40 51 23 35 e-mail : services.iers(a)obspm.fr http://hpiers.obspm.fr/eop-pc Paris, 09 January 2023 Bulletin C 65 To authorities responsible for the measurement and distribution of time INFORMATION ON UTC - TAI NO leap second will be introduced at the end of June 2023. The difference between Coordinated Universal Time UTC and the International Atomic Time TAI is : from 2017 January 1, 0h UTC, until further notice : UTC-TAI = -37 s Leap seconds can be introduced in UTC at the end of the months of December or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every six months, either to announce a time step in UTC, or to confirm that there will be no time step at the next possible date. Christian BIZOUARD Director Earth Orientation Center of IERS Observatoire de Paris, France

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Maryland House Bill 165--permanent DST
by Arthur David Olson Jan. 20, 2023

Jan. 20, 2023

This year's session of the Maryland state legislature is off and running. On Monday, Delegate Crosby's bill 165 was read for the first time; it would put Maryland on permanent Daylight Saving Time. A similar bill was introduced last year; it passed the House but died in a Senate committee. The bill is contingent on federal enabling legislation and on adoption of permanent DST by neighboring jurisdictions. Once the contingencies are met, the bill specifies that "this Act shall take effect on the earlier of the second Sunday of March or the first Sunday of November." So yes, if the contingencies are met on October 31, there'd be less than a week's notice of cancellation of setting clocks back. I plan to be in touch with one of my representatives to suggest a parsimonious improvement: change "earlier" to "later." There are links to the bill's text and to a status page below. @dashdashado https://mgaleg.maryland.gov/2023rs/bills_noln/hb/fhb0165.pdf https://mgaleg.maryland.gov/mgawebsite/Legislation/Details/hb0165?ys=2023rs

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not getting proper timezone for few countries
by Bhardwaj, vanshika Jan. 19, 2023

Jan. 19, 2023

Hello , We are using tzdata vendor source latest version which is 2022g in our code ,which basically return the timezones value of the country as per the mapping but we found for few of the countries we are getting alphanumeric value as an output of time-zone, like if we select India so timezones we are getting for India is IST as an output which is expected ,but if we select brasalia so timezones for Brasalia we are getting is -03 , which is alpha-numeric value , so can u please tell us when u are going to add the timezones for the rest of the countries or it will be same. Hope u will reply soon. With Regards, Vanshika Bhardwaj Associate Engineer(Eaton)

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Swiss time selectable for Germany
by Benjamin Drung Jan. 18, 2023

Jan. 18, 2023

Hi, I tried tzselect for Germany and was presented with following question: Please select one of the following timezones. 1) Swiss time 2) Germany (most areas), Scandinavia We do not use Swiss time in Germany. I did some research: Germany switched to summertime in 1980 and Swiss in 1981. There is Büsingen am Hochrhein which followed Swiss and therefore deviated from Germany only in 1980. Should zone1970.tab reflect the current status (i.e. drop DE from Europe/Zurich and rename "Germany (most areas)" to "Germany" in the comments)? -- Benjamin Drung Debian & Ubuntu Developer

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[PROPOSED] Be more consistent about MSK/MSD
by Paul Eggert Jan. 17, 2023

Jan. 17, 2023

* NEWS: Mention this. * europe (Europe/Volgograd, Europe/Kirov): Use the abbreviations MSK/MSD when using Moscow time, since that’s what other Russian timezones do. This fixes an inconsistency introduced in 2016g. --- NEWS | 6 ++++++ europe | 18 +++++++++--------- 2 files changed, 15 insertions(+), 9 deletions(-) diff --git a/NEWS b/NEWS index 7bd80803..fc35046c 100644 --- a/NEWS +++ b/NEWS @@ -26,6 +26,12 @@ Unreleased, experimental changes since 1970. (Thanks to Almaz Mingaleev.) This affects some pre-1948 timestamps. The old data are now in 'backzone'. + Changes to past time zone abbreviations + + When observing Moscow time, Europe/Kirov and Europe/Volgograd now + use the abbreviations MSK/MSD instead of numeric abbreviations, + for consistency with other timezones observing Moscow time. + Changes to code You can now tell tzselect local time, to simplify later choices. diff --git a/europe b/europe index 89bc3a28..b784d0ee 100644 --- a/europe +++ b/europe @@ -2656,13 +2656,13 @@ Zone Europe/Volgograd 2:57:40 - LMT 1920 Jan 3 3:00 - +03 1930 Jun 21 4:00 - +04 1961 Nov 11 4:00 Russia +04/+05 1988 Mar 27 2:00s - 3:00 Russia +03/+04 1991 Mar 31 2:00s + 3:00 Russia MSK/MSD 1991 Mar 31 2:00s 4:00 - +04 1992 Mar 29 2:00s - 3:00 Russia +03/+04 2011 Mar 27 2:00s - 4:00 - +04 2014 Oct 26 2:00s - 3:00 - +03 2018 Oct 28 2:00s + 3:00 Russia MSK/MSD 2011 Mar 27 2:00s + 4:00 - MSK 2014 Oct 26 2:00s + 3:00 - MSK 2018 Oct 28 2:00s 4:00 - +04 2020 Dec 27 2:00s - 3:00 - +03 + 3:00 - MSK # From Paul Eggert (2016-11-11): # Europe/Saratov covers: @@ -2693,11 +2693,11 @@ Zone Europe/Saratov 3:04:18 - LMT 1919 Jul 1 0:00u Zone Europe/Kirov 3:18:48 - LMT 1919 Jul 1 0:00u 3:00 - +03 1930 Jun 21 4:00 Russia +04/+05 1989 Mar 26 2:00s - 3:00 Russia +03/+04 1991 Mar 31 2:00s + 3:00 Russia MSK/MSD 1991 Mar 31 2:00s 4:00 - +04 1992 Mar 29 2:00s - 3:00 Russia +03/+04 2011 Mar 27 2:00s - 4:00 - +04 2014 Oct 26 2:00s - 3:00 - +03 + 3:00 Russia MSK/MSD 2011 Mar 27 2:00s + 4:00 - MSK 2014 Oct 26 2:00s + 3:00 - MSK # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25): # Europe/Samara covers... -- 2.37.2

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localtime_r multiple times slower for Europe/Moscow timezone
by Benjamin Drung Jan. 11, 2023

Jan. 11, 2023

Hi, a Ubuntu user has been reporting in https://launchpad.net/bugs/868395 that the Europe/Moscow timezone is multiple times slower than other timezones. Here is the example bug.c code: ``` #include <time.h> #include <stdio.h> int main() { time_t t = time(0); int i; struct tm result; for(i=0; i < 10000000; i++) localtime_r(&t, &result); puts(ctime(&t)); return 0; } ``` Compile and run this code: ``` gcc -o bug bug.c time TZ=Etc/UTC ./bug time TZ=Europe/Berlin ./bug time TZ=Europe/Moscow ./bug ``` The result on my machine is that Etc/UTC, Europe/Berlin, and other timezones take around 250 to 400 ms, but Europe/Moscow takes 1200 ms. The result is the same when running in a Debian unstable, Ubuntu 22.04 (jammy) and Ubuntu 23.04 (lunar) chroot. Is that a bug? If yes, is that a bug in glibc? -- Benjamin Drung Debian & Ubuntu Developer

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[PROPOSED 1/2] Fix stray ‘\’ in tzselect
by Paul Eggert Jan. 11, 2023

Jan. 11, 2023

* tzselect.ksh: Remove stray backslash that messed up the wording of a diagnostic. This glitch was introduced in commit 13980693084c36e0275828d8d46d9d9e8975be0d dated Wed Jun 27 11:24:09 2018 -0700. --- tzselect.ksh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tzselect.ksh b/tzselect.ksh index 87baaa5..cbfc677 100644 --- a/tzselect.ksh +++ b/tzselect.ksh @@ -401,7 +401,7 @@ while BEGIN { FS = "\t" } { print $NF } '` - echo >&2 'Please select one of the following timezones,' \ + echo >&2 'Please select one of the following timezones,' echo >&2 'listed roughly in increasing order' \ "of distance from $coord". doselect $regions -- 2.39.0

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[PROPOSED] Omit check_sorted dependencies no longer needed
by Paul Eggert Jan. 10, 2023

Jan. 10, 2023

* Makefile (check_sorted): Omit unnecessary dependencies on iso3166.tab, zone.tab, zone1970.tab. They should have been removed in commit 1bb4263bb1716fe3ba63b26600adc9c32f1fe16e dated 2019-06-22 13:55:46 -0700. --- Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Makefile b/Makefile index 8bee50d..721a745 100644 --- a/Makefile +++ b/Makefile @@ -837,7 +837,7 @@ check_slashed_abbrs: $(TDATA_TO_CHECK) CHECK_CC_LIST = { n = split($$1,a,/,/); for (i=2; i<=n; i++) print a[1], a[i]; } -check_sorted: backward backzone iso3166.tab zone.tab zone1970.tab +check_sorted: backward backzone $(AWK) '/^Link/ {printf "%.5d %s\n", g, $$3} !/./ {g++}' \ backward | LC_ALL=C sort -cu $(AWK) '/^Zone/ {print $$2}' backzone | LC_ALL=C sort -cu -- 2.39.0

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