Time Zone
Attempt at global Standard Time.
Can drive your Culture - see Eastern Standard Tribe.
Map showing where timezone-time is surprisingly far from solar time. China is about as big across as the continental United States and has only one huge time zone.
Handy tool/site for lining up: http://www.worldtimebuddy.com/
On User Options, enter a time zone to localize page modification times. See Zope's Date Time.py for allowed formats.
Note that Time Zone-s don't follow borders
- in the US, a number of states are split across Time Zone-s
- many other countries are split across Time Zone-s also
DST is a nightmare: see http://www.webexhibits.org/daylightsaving/index.html
- UTC is the Coordinated Universal Time, which does not move for Daylight Savings Time (DST).
- GMT does move, though when moved it's not actually called GMT, but rather BST (British Summer Time).
- Some parts of the US (e.g. Arizona, Hawaii) don't do DST.
- Of those parts of the US that do DST, they don't switch on the same date as the GMT/BST switch.
Most LinuxOS apps (e.g. Postgresql Timezone Problem) will give you functions to convert a timestamp, given an Olson Time Zone value.
Edited: | Tweet this!