Figure out DST start and end date/time

From: Jeffrey Stonebrook (stonebro_at_yahoo.com)
Date: 12/30/03 

Date: 30 Dec 2003 11:05:49 -0800

Is their a mechanism to determine what the start date / time and
end date / time of Daylight Savings Time is for a given TimeZone
if the time zone supports Daylights Savings ?

Thanks
Jeff