Our database keeps track of a number of "Production Facilities". Each facility has an address, name, and most importantly timezone. How do I figure out the name of a timezone?
It was obvious for our initial facilities because the code is named after our city (America/Edmonton). How can I more generally determine the correct timezone code to use in Java via the call DateTimeZone.forID("timeZone") ex DateTimeZone.forID("America/Edmonton")?
Specifically we are opening a facility in Atlanta Georgia and I am unsure which code to use? Is it one of these?
- "Atlantic/South_Georgia"
- US/Eastern"
- "EST5EDT"
- "EST"
4 Answers
This kind of information can be really tricky (not to mention tricky to keep current). It can actually vary county by county (there is an excellent West Wing scene about this :). Google Maps API recently included support to go from lat+lon to TimeZone
The IANA standard timezone identifier for Eastern Time is America/New_York. Presumably this is the standard Joda time is using, since (1) everyone uses it and (2) the city-name-as-identifier gives it away.
You can get a list with:
for (String string : TimeZone.getAvailableIDs(TimeZone.getTimeZone( "GMT-05:00").getRawOffset())) {
System.out.println(string);
}And it will include (among many others) "US/Eastern".
You can list the available timezone id's using this method: ()
The time zone data seems to come from this database:
You can do lookups in it here:
