From 6eb9c5a5657d1fe77b55cc261450f3538d35a94d Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 14:19:15 +0200 Subject: Adding upstream version 13.4. Signed-off-by: Daniel Baumann --- src/timezone/tznames/README | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 src/timezone/tznames/README (limited to 'src/timezone/tznames/README') diff --git a/src/timezone/tznames/README b/src/timezone/tznames/README new file mode 100644 index 0000000..6d355e4 --- /dev/null +++ b/src/timezone/tznames/README @@ -0,0 +1,40 @@ +src/timezone/tznames/README + +tznames +======= + +This directory contains files with timezone sets for PostgreSQL. The problem +is that time zone abbreviations are not unique throughout the world and you +might find out that a time zone abbreviation in the `Default' set collides +with the one you wanted to use. This can be fixed by selecting a timezone +set that defines the abbreviation the way you want it. There might already +be a file here that serves your needs. If not, you can create your own. + +In order to use one of these files, you need to set + + timezone_abbreviations = 'xyz' + +in any of the usual ways for setting a parameter, where xyz is the filename +that contains the desired time zone abbreviations. + +If you do not find an appropriate set of abbreviations for your geographic +location supplied here, please report this to . +Your set of time zone abbreviations can then be included in future releases. +For the time being you can always add your own set. + +Typically a custom abbreviation set is made by including the `Default' set +and then adding or overriding abbreviations as necessary. For examples, +see the `Australia' and `India' files. + +The files named Africa.txt, etc, are not intended to be used directly as +time zone abbreviation files. They contain reference definitions of time zone +abbreviations that can be copied into a custom abbreviation file as needed. +These files contain most of the time zone abbreviations that were shown +in the IANA timezone database circa 2010. + +However, it turns out that many of these abbreviations had simply been +invented by the IANA timezone group, and do not have currency in real-world +use. The IANA group have changed their policy about that, and now prefer to +use numeric UTC offsets whenever there's not an abbreviation with known +real-world popularity. A lot of these abbreviations therefore no longer +appear in the IANA data, and so are marked "obsolete" in these data files. -- cgit v1.2.3