>From a08dea1d9b78d05e13ffbe2896bae4e443bb017d Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Sun, 24 Apr 2016 12:19:31 -0700 Subject: [PROPOSED PATCH] * NEWS, tz-link.htm: Cite Matt Johnson on change notice. --- NEWS | 5 +++++ tz-link.htm | 63 ++++++++++++++++++++++++++++++++++++++++--------------------- 2 files changed, 46 insertions(+), 22 deletions(-) diff --git a/NEWS b/NEWS index 17c5934..04fac5e 100644 --- a/NEWS +++ b/NEWS @@ -7,6 +7,11 @@ Unreleased, experimental changes Asia/Baku's 1992-09-27 transition from +04 (DST) to +04 (non-DST) was at 03:00, not 23:00 the previous day. (Thanks to Michael Deckers.) + Changes affecting documentation and commentary + + tz-link.htm says why governments should give plenty of notice for + time zone or DST changes, and refers to Matt Johnson's blog post. + Release 2016d - 2016-04-17 22:50:29 -0700 diff --git a/tz-link.htm b/tz-link.htm index feede12..80f40bd 100644 --- a/tz-link.htm +++ b/tz-link.htm @@ -10,7 +10,7 @@ content="Sources for time zone and daylight saving time data"> - +

Sources for time zone and daylight saving time data

+

+Time zone and daylight saving rules are controlled by individual +governments. They are sometimes changed with little notice, and their +histories and planned futures are often recorded only fitfully. Here +is a summary of attempts to organize and record relevant data in this +area. +

The tz database

The public-domain @@ -140,8 +147,10 @@ The code lets you compile the tz source files into machine-readable binary files, one for each location. It also lets you read a tz binary file and interpret time stamps for that location.

+

Changes to the tz database

-The files are by no means authoritative. If you find errors, please +The tz code and data +are by no means authoritative. If you find errors, please send changes to the time zone mailing list. You can also browse recent @@ -149,28 +158,15 @@ messages sent to the mailing list, subscribe to it, and browse the archive of old -messages. For further information about updates, please see -Procedures for -Maintaining the Time Zone Database (Internet RFC 6557).

+messages.

-The Web has several other sources for time zone and daylight saving time data. -Here are some links that may be of interest. +If your government plans to change its time zone boundaries or +daylight saving rules, let the mailing list know well in advance. With +less than a year's notice there is a good chance that some +computer-based clocks will operate incorrectly after the change, due +to delays in propagating updates to software and data. The shorter +the notice, the more likely clock problems will arise.

-

Commentary on the tz database

- -

Editing tz database source files

Sources for the tz database are UTF-8 @@ -188,6 +184,29 @@ zoneinfo is a Sublime Text package for syntax highlighting tz source files. +

+For further information about updates, please see +Procedures for +Maintaining the Time Zone Database (Internet RFC 6557).

+

Commentary on the tz database

+

Web sites using recent versions of the tz database

These are listed roughly in ascending order of complexity and fanciness. -- 2.7.4