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If this interests you, and/or if you need to properly handle these kind of things in your code, it's good to keep up with the ZoneInfo/TZ Database and the assoc

If this interests you, and/or if you need to properly handle these kind of things in your code, it's good to keep up with the ZoneInfo/TZ Database and the associated mailing lists. http://en.wikipedia.org/wiki/Tz_database http://en.wikipedia.org/wiki/Tz_database http://cs.ucla.edu/~eggert/tz/tz-link.htm http://cs.ucla.edu/~eggert/tz/tz-link.htm Luckily for most people the ZoneInfo DB is part of the OS and gets updated with your system updates, but if you care about time in your app, you need to be aware of these. Governments dictatorial and democratic alike love to screw with the engineers of the world by changing this stuff around all the damn time.

beagle3 15y ago
> Luckily for most people the ZoneInfo DB is part of the OS and gets updated with your system updates Actually, that's NOT true, because most people use Windows, whose TimeZoneDB is horribly implemented, and only cares about the present (and only if you updated recently). If you ask it about 2003, it will answer with today's rules, not with the rules that were in effect in 2003. While this is just a little bad for the US (rules changed only twice in the last 50 years), in some countries they have changed every other year, or they cannot be expressed with the rules that Windows has. Windows date and time handling is a joke.