[tz] Posix time zone question
dmacq at erols.com
Wed Jan 11 20:58:38 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
2) Where is the format of the tz source filesdescribed? Specifically what do
SAVE and Letter/S mean below? I am also interested in what the Link format is.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
3) AIX machines use their own wacky format such at TZ=EST5EDT. Is there any
decent mapping to real names?
I have googled my brains out on this and searched the comp.time.tz archives on
gmane with no luck.
Thanks in advance,
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