In perl 5.6.0, on redhat 7, I used to do something like this: 
$ENV{TZ}="US/Eastern";
# use locatime(time) to get the time
$ENV{TZ}="Other/Zone";
# use localtime(time) to get the time
# subtract the difference

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This doesn't work anymore on perl 5.8.0 on redhat 9. Although perl will start and localtime() obeys the current setting of TZ, using ENV{TZ} to change it, does nothing! so now I have to use this terrible thing: 
my $rfc_offset = `TZ=US/Eastern; date +%s`;
my $rfc_offset2= `TZ=Other/Zone; date +%s`;
# code to work out difference in seconds.

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Which is highly upsetting! I do not want to load the huge Date::Time module in just do so such a simple thing. (current seconds difference between two time zones). What shall I do? I've tried POSIX strftime as well, and that doesnt help anymore either. Why was this (apparently) changed? or is it a bug?

In reply to Offset between two time zones. by AsianFlu

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