Date::Manip, Date::Calc, a search of http://search.cpan.org for the keyword, "date."

Get to know CPAN very well. If you actually had to "start from scratch" to do most things, Perl would be nothing-special. Even if you can't easily install a module, you can always look at the source-code to it on the website to see precisely how the trick is done.

In reply to Re: time difference calculation by Anonymous Monk
in thread time difference calculation by Anonymous Monk

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