I had a similar problem with an application that had to return local times for multiple timezones.
An easy enough way to do this is to use the DateTime module.
To convert a known time to another time, you can use:
my $oldDate = DateTime->new(month=>$monthVar,
$dateObject = $oldDate->clone()->set_time_zone('UTC');
$dateObject =~ s/T/ /;
print &UnixDate($dateObject,"%m/%d/%Y %H:%M")
In order to just get the current date/time in UTC format, you can use:
$dateObject = DateTime->now(time_zone=>'UTC');