The from_epoch method defaults to the UTC time zone, which is the same as "Z".

When I just tried to install DateTime on my Windows system, there seemed to be a circular installation dependency between DateTime and DateTime::TimeZone. Just FYI.

As an alternative to the second part of saintmike's solution, one could do:

use Date::Parse;
use POSIX;

my $time = str2time("26/Aug/2005:01:05:43 -0400");
print POSIX::strftime("%Y%m%d%H%M%SZ", gmtime($time)), "\n";
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