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[PATCH] * tz-art.htm (Jokes): Add Keillor joke on tz security.
by Paul Eggert Aug. 25, 2017

Aug. 25, 2017

--- tz-art.htm | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tz-art.htm b/tz-art.htm index abe8eb3..a42361f 100644 --- a/tz-art.htm +++ b/tz-art.htm @@ -549,6 +549,14 @@ yesterday daylight [saving] time ended. Right now it's basically midnight." (Conan O'Brien on the 2010-11-08 premiere of Conan.) </li> <li> +"And now, driving to California, I find that I must enter a password +in order to change the time zone on my laptop clock. Evidently, +someone is out to mess up my schedule and my clock must be secured." +(Garrison Keillor, +"<a href="http://www.garrisonkeillor.com/weve-never-been-here-before/">We've +never been here before</a>", 2017-08-22) +</li> +<li> "Well, in my time zone that's all the time I have, but maybe in your time zone I haven't finished yet. So stay tuned!" (Goldie Hawn, Rowan & Martin's Laugh-In No. 65, 1970-03-09) -- 2.7.4

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Fixed typos
by Dominique Pellé Aug. 21, 2017

Aug. 21, 2017

Hi Following patch fixes various typos: diff --git a/asia b/asia index e26ef1b..7518e0c 100644 --- a/asia +++ b/asia @@ -900,7 +900,7 @@ Zone Asia/Dili 8:22:20 - LMT 1912 Jan 1 # From Paul Eggert (2017-04-20): # Good luck trying to nail down old timekeeping records in India. # "... in the nineteenth century ... Madras Observatory took its magnetic -# measurements in Göttingen time, its meterological measurements on Madras +# measurements in Göttingen time, its metrological measurements on Madras # (local) time, dropped its time ball on Greenwich (ocean navigator's) time, # and distributed civil (local time)." -- Bartky IR. Selling the time: # 19th-century timekeeping in america. Stanford U Press (2000), 247 note 19. @@ -917,7 +917,7 @@ Zone Asia/Dili 8:22:20 - LMT 1912 Jan 1 # # "In 1870 ... Madras time - 'now used by the telegraph and regulated from the # only government observatory' - was suggested as a standard railway time, -# first to be dopted on the Great Indian Peninsular Railway (GIPR).... +# first to be adopted on the Great Indian Peninsular Railway (GIPR).... # Calcutta, Bombay, and Karachi, were to be allowed to continue with their # local time for civil purposes." - Prasad R. Tracks of Change: Railways and # Everyday Life in Colonial India. Cambridge University Press (2016), 145. diff --git a/australasia b/australasia index 6bf0f0a..1e38db7 100644 --- a/australasia +++ b/australasia @@ -1306,7 +1306,7 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # http://abc.net.au/news/regionals/neweng/monthly/regeng-22jul1999-1.htm # (1999-07-22). For now, we'll wait to see if this really happens. # -# Victoria will following NSW. See: +# Victoria will follow NSW. See: # Vic to extend daylight saving (1999-07-28) # http://abc.net.au/local/news/olympics/1999/07/item19990728112314_1.htm # diff --git a/backzone b/backzone index 69f6a95..255c4a6 100644 --- a/backzone +++ b/backzone @@ -559,7 +559,7 @@ Zone Europe/Guernsey -0:10:09 - LMT 1913 Jun 18 # Time Act in 1883 and including additional confirmation of some of # the dates of the 'Summer Time' orders originating at # Westminster. There is a little uncertainty as to the starting date -# of the first summer time in 1916 which may have be announced a +# of the first summer time in 1916 which may have been announced a # couple of days late. There is still a substantial number of # documents to work through, but it is thought that every GB change # was also implemented on the island. diff --git a/europe b/europe index 0620db6..8cc55e8 100644 --- a/europe +++ b/europe @@ -2303,7 +2303,7 @@ Zone Europe/Bucharest 1:44:24 - LMT 1891 Oct # http://itar-tass.com/obschestvo/1333711 # http://www.pravo.gov.ru:8080/page.aspx?111660 # http://www.kremlin.ru/acts/46279 -# From October 26, 2014 the new Russian time zone map will looks like this: +# From October 26, 2014 the new Russian time zone map will look like this: # http://www.worldtimezone.com/dst_news/dst_news_russia-map-2014-07.html # From Paul Eggert (2006-03-22): diff --git a/southamerica b/southamerica index 6038c3b..a07da71 100644 --- a/southamerica +++ b/southamerica @@ -1076,7 +1076,7 @@ Zone America/Rio_Branco -4:31:12 - LMT 1914 # the following source, cited by Oscar van Vlijmen (2006-10-08): # [1] Chile Law # http://www.webexhibits.org/daylightsaving/chile.html -# This contains a copy of a this official table: +# This contains a copy of this official table: # Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30) # http://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.… # [1] needs several corrections, though.

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Fiji DST change
by Dominic Fok Aug. 21, 2017

Aug. 21, 2017

Hi all, Here is a daylight saving order for Fiji DST in 2018 to finish on the 14th, rather than the 21st (local time). I believe IATA have also sent out a similar memo. Could tzdatabase be updated please? Thanks, D Good planets are hard to find - please think of the environment before you print this email. ____________________________________________________________________ CAUTION - This message may contain privileged and confidential information intended only for the use of the addressee named above. If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited. If you have received this message in error please notify Air New Zealand immediately. Any views expressed in this message are those of the individual sender and may not necessarily reflect the views of Air New Zealand. _____________________________________________________________________ For more information on the Air New Zealand Group, visit us online at http://www.airnewzealand.com _____________________________________________________________________

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Madras Observatory reports [RE: Fixed typos]
by Gent, R.H. van (Rob) Aug. 20, 2017

Aug. 20, 2017

In the 19th century it was quite common for an astronomical observatory to also make meteorological and magnetic observations. https://archive.org/details/meteorological1841to45madruoft https://archive.org/details/magneticalobser00indgoog The 19th-century Madras Observatory reports can be found at http://adsabs.harvard.edu/historical.html Rob van Gent -----Original Message----- From: tz-bounces(a)iana.org [mailto:tz-bounces@iana.org] On Behalf Of J William Piggott Sent: 20 August 2017 14:22 To: Ice Karma (J. Connell) 「氷宿縁」; Time Zone Mailing List Subject: Re: [tz] Fixed typos On 08/20/2017 12:17 AM, Ice Karma (J. Connell) 7¿ wrote: > I suspect "meterological" in the first diff hunk should actually read > "meteorological", rather than "metrological". It seems unlikely that the Madras Observatory was making weather reports. I imagine the author intended to write "astronomical" measurements. However, since it is written as a direct quote the mistake should be left as is, possibly with [sic]? > > â¬Ice Karma >

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Syntax highlighting for Sublime Text
by Gilmore Davidson Aug. 16, 2017

Aug. 16, 2017

Hi, I’ve created some tzdata syntax highlighting rules for the Sublime Text editor: https://packagecontrol.io/packages/zoneinfo <https://packagecontrol.io/packages/zoneinfo> I have no idea if anyone other than me uses that particular text editor for looking at tzdata files. But I thought I’d mention it just in case it’s useful to someone. Cheers, Gil

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[PROPOSED] * NEWS: Add "Briefly:" for changes so far.
by Paul Eggert Aug. 10, 2017

Aug. 10, 2017

--- NEWS | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/NEWS b/NEWS index 69b6a8b..808959a 100644 --- a/NEWS +++ b/NEWS @@ -2,6 +2,11 @@ News for the tz database Unreleased, experimental changes + Briefly: Namibia switches from +01/+02 to +02 on 2018-04-01. + 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. + Changes to future time stamps Namibia will switch from +01 with DST to +02 all year on -- 2.7.4

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Namibia to change time zone/go permanent DST
by Steffen Thorsen Aug. 10, 2017

Aug. 10, 2017

Namibia is going to change their time zone to what is now their DST: https://www.newera.com.na/2017/02/23/namibias-winter-time-might-be-repealed/ This video is from the government decision: https://www.nbc.na/news/na-passes-namibia-time-bill-repealing-1994-namibia-… We have made the assumption so far that they will change their time zone at the same time they would normally start DST, the first Sunday in September: https://www.timeanddate.com/news/time/namibia-new-time-zone.html Best regards, Steffen

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Israel POSIX timezone string error on release 2017b?
by André Domingos Brízido Aug. 8, 2017

Aug. 8, 2017

Hello According to the Linux manual (http://man7.org/linux/man-pages/man5/tzfile.5.html) the last line of the time zone database may contain the POSIX timezone string, which is the case of the files generated by following the instructions in https://www.iana.org/time-zones/repository/tz-link.html I've downloaded the latest release (2017b) and I obtain the following POSIX string for Israel: [/usr/share/zoneinfo]# tail -n 1 Israel IST-2IDT,M3.4.4/26,M10.5.0 But if I understood correctly, the POSIX specification (http://pubs.opengroup.org/onlinepubs/9699919799/) states that the value '26' is out of range. It should be between zero and 24. My linux system does not display the correct timezone if I use the string 'IST-2IDT,M3.4.4/26,M10.5.0' as the contents of /etc/TZ. Best regards Andre Brizido

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[PROPOSED] Improve tzfile.5 formatting and clarity
by Paul Eggert Aug. 7, 2017

Aug. 7, 2017

* tzfile.5: Break out field descriptions into bulleted lists, to make them easier to follow. This does not change the technical content of the spec, just its presentation. --- tzfile.5 | 77 ++++++++++++++++++++++++++++++++++++++++------------------------ 1 file changed, 48 insertions(+), 29 deletions(-) diff --git a/tzfile.5 b/tzfile.5 index 52c5301..b7dc828 100644 --- a/tzfile.5 +++ b/tzfile.5 @@ -10,17 +10,29 @@ tzfile \- time zone information \\$3\*(lq\\$1\*(rq\\$2 .. The time zone information files used by -.IR tzset (3) -begin with the magic characters "TZif" to identify them as -time zone information files, -followed by a character identifying the version of the file's format -(as of 2013, either an ASCII NUL, or '2', or '3') -followed by fifteen bytes containing zeroes reserved for future use, -followed by six four-byte integer values +.BR tzset (3) +are typically found under a directory with a name like +.IR /usr/share/zoneinfo . +These files begin with a 44-byte header containing the following fields: +.IP * 2 +The magic four-byte ASCII sequence +.q "TZif" +identifies the file as a time zone information file. +.IP * +A byte identifying the version of the file's format +(as of 2017, either an ASCII NUL, or +.q "2", +or +.q "3" ). +.IP * +Fifteen bytes containing zeros reserved for future use. +.IP * +Six four-byte integer values written in a standard byte order (the high-order byte of the value is written first). These values are, in order: +.RS .TP .I tzh_ttisgmtcnt The number of UT/local indicators stored in the file. @@ -40,28 +52,30 @@ The number of local time types for which data entries are stored in the file (must not be zero). .TP .I tzh_charcnt -The number of characters of time zone abbreviation strings +The number of bytes of time zone abbreviation strings stored in the file. +.RE .PP -The above header is followed by +The above header is followed by the following fields, whose lengths +vary depend on the contents of the header: +.IP * 2 .I tzh_timecnt four-byte signed integer values sorted in ascending order. These values are written in standard byte order. Each is used as a transition time (as returned by -.IR time (2)) +.BR time (2)) at which the rules for computing local time change. -Next come +.IP * .I tzh_timecnt one-byte unsigned integer values; each one tells which of the different types of local time types described in the file is associated with the time period starting with the same-indexed transition time. -These values serve as indices into an array of -.I ttinfo -structures (with +These values serve as indices into the next field. +.IP * .I tzh_typecnt -entries) that appears next in the file; -these structures are defined as follows: +.I ttinfo +entries, each defined as follows: .in +.5i .sp .nf @@ -87,20 +101,19 @@ gives the number of seconds to be added to UT, tells whether .I tm_isdst should be set by -.I localtime (3) +.BR localtime (3) and .I tt_abbrind -serves as an index into the array of time zone abbreviation characters +serves as an index into the array of time zone abbreviation bytes that follow the .I ttinfo structure(s) in the file. -.PP -Then there are +.IP * .I tzh_leapcnt pairs of four-byte values, written in standard byte order; the first value of each pair gives the nonnegative time (as returned by -.IR time(2)) +.BR time (2)) at which a leap second occurs; the second gives the .I total @@ -109,16 +122,14 @@ starting at the given time. The pairs of values are sorted in ascending order by time. Each transition is for one leap second, either positive or negative; transitions always separated by at least 28 days minus 1 second. -.PP -Then there are +.IP * .I tzh_ttisstdcnt standard/wall indicators, each stored as a one-byte value; they tell whether the transition times associated with local time types were specified as standard time or wall clock time, and are used when a time zone file is used in handling POSIX-style time zone environment variables. -.PP -Finally there are +.IP * .I tzh_ttisgmtcnt UT/local indicators, each stored as a one-byte value; they tell whether the transition times associated with local time types @@ -126,7 +137,9 @@ were specified as UT or local time, and are used when a time zone file is used in handling POSIX-style time zone environment variables. .PP -.I Localtime +The +.BR localtime (3) +function uses the first standard-time .I ttinfo structure in the file @@ -137,11 +150,12 @@ if either .I tzh_timecnt is zero or the time argument is less than the first transition time recorded in the file. -.PP +.SS Version 2 format For version-2-format time zone files, the above header and data are followed by a second header and data, identical in format except that eight bytes are used for each transition time or leap second time. +(Leap second counts remain four bytes.) After the second header and data comes a newline-enclosed, POSIX-TZ-environment-variable-style string for use in handling instants after the last transition time stored in the file @@ -154,7 +168,7 @@ then if a last transition time is in July, the transition's local time type must specify a daylight-saving time abbreviated .q "WEST" that is one hour east of UT. -.PP +.SS Version 3 format For version-3-format time zone files, the POSIX-TZ-style string may use two minor extensions to the POSIX TZ format, as described in .IR newtzset (3). @@ -166,6 +180,11 @@ between daylight saving and standard time. .PP Future changes to the format may append more data. .SH SEE ALSO -newctime(3), newtzset(3), zdump(8), zic(8) +.BR time (2), +.BR localtime (3), +.BR tzset (3), +.BR tzselect (8), +.BR zdump (8), +.BR zic (8) .\" This file is in the public domain, so clarified as of .\" 1996-06-05 by Arthur David Olson. -- 2.7.4

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[PROPOSED] Minor tz-link updates.
by Paul Eggert Aug. 1, 2017

Aug. 1, 2017

* tz-link.htm: Add Noda Time updater. Add a downloading header, and simplify text editor discussion. --- tz-link.htm | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) diff --git a/tz-link.htm b/tz-link.htm index 803727b..589c781 100644 --- a/tz-link.htm +++ b/tz-link.htm @@ -10,7 +10,7 @@ content="Sources for time zone and daylight saving time data"> <meta name="DC.Creator" content="Eggert, Paul"> <meta name="DC.Contributor" content="Olson, Arthur David"> -<meta name="DC.Date" content="2017-07-08"> +<meta name="DC.Date" content="2017-08-01"> <meta name="DC.Description" content="Sources of information about time zones and daylight saving time"> <meta name="DC.Identifier" @@ -105,6 +105,7 @@ Universal Time</a> (<abbr>UTC</abbr>). The database also records when daylight saving time was in use, along with some time zone abbreviations such as <abbr>EST</abbr> for Eastern Standard Time in the <abbr>US</abbr>. +<h2 id="download">Downloading the <code><abbr>tz</abbr></code> database</h2> The following <a href="https://en.wikipedia.org/wiki/Unix_shell">shell</a> commands download @@ -196,9 +197,10 @@ title="International Components for Unicode">ICU</abbr></a>, <a href="https://developer.ibm.com/javasdk/support/dst/jtzu/"><abbr>IBM</abbr></a> and <a href="http://www.oracle.com/technetwork/java/javase/tzupdater-readme-136440.html">Oracle</a> -Java, <a href="http://www.joda.org/joda-time/tz_update.html">Joda-Time</a>, +Java, <a href="http://www.joda.org/joda-time/tz_update.html">Joda-Time</a>, <a +href="https://dev.mysql.com/doc/refman/en/time-zone-support.html">MySQL</a>, and <a -href="https://dev.mysql.com/doc/refman/en/time-zone-support.html">MySQL</a>. +href="http://nodatime.org/userguide/tzdb">Noda Time</a> (see below). Sources for the <code><abbr>tz</abbr></code> database are <a href="https://en.wikipedia.org/wiki/UTF-8"><abbr @@ -209,14 +211,11 @@ title="linefeed">LF</abbr></a>, which can be modified by common text editors such as <a href="https://www.gnu.org/software/emacs/">GNU Emacs</a>, <a href="https://wiki.gnome.org/Apps/Gedit">gedit</a>, and -<a href="http://www.vim.org">vim</a>. One -editor has a package to simplify editing further: -<ul> -<li><a href="https://packagecontrol.io/packages/zoneinfo">Sublime -zoneinfo</a> is a <a href="http://www.sublimetext.com">Sublime -Text</a> package for syntax highlighting <code><abbr>tz</abbr></code> -source files.</li> -</ul> +<a href="http://www.vim.org">vim</a>. The <a +href="http://www.sublimetext.com">Sublime Text</a> editor has +a <a href="https://packagecontrol.io/packages/zoneinfo">Sublime +zoneinfo</a> package to simplify editing further. + For further information about updates, please see <a href="https://tools.ietf.org/html/rfc6557">Procedures for -- 2.7.4

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