Using Date::Manip: 

use strict;
use Date::Manip;

my $from = 'Wed Dec 29 08:17:04';
my $to   = UnixDate($from, "%y-%m-%d_%H:%M:%S");

print "$to\n";

[download]

That may not be the fastest method, since Date::Manip is pure Perl and is a bit slow. But it's pretty clear and allows both the input and output format to change as needed.

In reply to Re: Optimal Date conversion? (Too much information) by steves
in thread Optimal Date conversion? (Too much information) by McMahon

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