Daylight savings time timezone conversion automatically?

Hello All,

I love perl and am grateful to have DateTime::TimeZone!  The
trouble is I need to find the GMT offset for a timezone and I don't
know how to do this correctly for daylight saving time.  Is there no
way to find this GMT offset automatically or do I have to manually
check the date, see if it is inside the DST dates, then change from
something like EST to EST5EDT?  That is a little irritating, is there
no way that is more robust/automatic?

Thanks,

-Tim