GMT is the storage solution, not the output format. Store all the times in UTC/GMT, and when you actually need to print them out, then use TZ-aware tools and use the localtime features. From one of my scripts, I have: 
use POSIX qw(LC_TIME);

$ENV{'TZ'} = "GMT-1";
$locale = "gb_UK";
POSIX::setlocale(LC_TIME,$locale);

my $todaysdate = POSIX::strftime("%a %b %d %H:%M",localtime());

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For the machines in the UK, that changes between -1 and -0 for summer and not, and the machines in germany, that changes between -2 and -1 for summer and winter, and locale is de_DE. Calling localtime() will then view the time as it should be in your locale.


the hatter

In reply to Re^4: Timezone antidote by hatter
in thread Timezone antidote by Andre_br

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