postgresql

mirror of https://git.postgresql.org/git/postgresql.git synced 2024-12-27 08:39:28 +08:00

History

Tom Lane d01b2e4e47 Update time zone data files to tzdata release 2009s: DST law changes in Antarctica, Argentina, Bangladesh, Fiji, Novokuznetsk, Pakistan, Palestine, Samoa, Syria. Also historical corrections for Hong Kong.		2009-12-09 00:36:08 +00:00
..
data	Update time zone data files to tzdata release 2009s: DST law changes in	2009-12-09 00:36:08 +00:00
tznames	Update the tznames reference files, and add IDT (Israel Daylight Time)	2009-09-06 15:25:39 +00:00
ialloc.c	Avoid including any backend-only stuff in the zic utility program.	2007-10-26 13:30:10 +00:00
localtime.c	pgindent run for 8.3.	2007-11-15 21:14:46 +00:00
Makefile	Adjust with-system-tzdata patch to not attempt to install a symlink,	2007-08-25 20:29:25 +00:00
pgtz.c	Fix identify_system_timezone() so that it tests the behavior of the system	2008-07-01 03:41:01 +00:00
pgtz.h	Update copyrights in source tree to 2008.	2008-01-01 19:46:01 +00:00
private.h
README
scheck.c	Avoid including any backend-only stuff in the zic utility program.	2007-10-26 13:30:10 +00:00
strftime.c
tzfile.h
zic.c	Avoid including any backend-only stuff in the zic utility program.	2007-10-26 13:30:10 +00:00

README

This is a PostgreSQL adapted version of the timezone library
from:

	ftp://elsie.nci.nih.gov/pub/tzcode*.tar.gz

The data files under data/ are an exact copy of the latest data set
from

	ftp://elsie.nci.nih.gov/pub/tzdata*.tar.gz

Since time zone rules change frequently in some parts of the world,
we should endeavor to update the data files before each PostgreSQL
release.

At each update, we should check if time zone offsets have changed.
Just search for the current or previous year and see what has changed.
Sometimes a country changes its time zone offsets, for example Georgia
in 2004.  Just grepping in the zic database files for 2004 is enough to
spot such a change.  Then the files under tznames/ should be updated.