[tz] Posix time zone question

Paul_Koning at Dell.com Paul_Koning at Dell.com
Wed Jan 11 21:38:44 UTC 2012

>I am adding time zone support to our multi-platform application and there are still a few things I cannot figure out.
>1) What is the difference between America/Detroit and posix/America/Detroit? The test cases I have written return what looks like the same DST record for a given date no matter which one I use. Under what circumstances would I use posix/America/Detroit?

Guess: "posix" might mean "no leap seconds".

>3) AIX machines use their own wacky format such at TZ=EST5EDT. Is there any decent mapping to real names?

No.  The real world complexity of timezones is far too great to be represented with that simplistic notation.  That's why the Olson tables exist.


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