David Cantrell wrote:
Tatsuhiko Miyagawa wrote:
You can get the user's country ... from Accept-Language HTTP header
No you can't. I prefer to use English (specifically en-gb) whether I'm
in the UK, Germany or Japan. Even if I were to move to Japan
permanently, I'd still prefer to use English, and so leave that header
set to en-gb, but would also like sites to know that I'm in the
Asia/Tokyo timezone.
A better method would be to find all the time zones with the same offset
as the user. You can get this offset from javascript if you're using a
web interface. What you don't have is a list of current offsets, so
you'd have to load each and every time zone module to get its offset.
Not fast and not cheap.
I'd consider
a) Get a list of time zones that are currently in use (ie, they didn't
stop in 1982 .. this might be all of them, I can't remember)
b) Create a hash of arrays where the key is the offset (all offsets for
the TZ .. DST and non-DST)
eg: ( 1100 => [ 'Australia/Melbourne', 'Australia/Sydney' ... ] )
c) Store that somewhere.
Now when you get an offset of 1100, you have a LOT smaller list of
possible TZs. Present that list to the user. Along with a button to
'show all time zones'.
Cheers!
Rick Measham
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