In the US, 2009 Daylight Saving Time begins on Sunday, March 8 at 2 AM and ends on Sunday, November 1 at 2 AM as well. Time moves ahead one hour in March while it moves back one hour in November (hence the saying "Spring forward, Fall back").
US Daylight Saving Time begins on the second Sunday of March and ends on the first Sunday of November. In many western European countries Daylight Saving Time begins on the last Sunday of March and concludes in October on the last Sunday of that month.
Incase you didn't know yet, Daylight savings Time just started March 8 at 2 am. So guys here in the US and Canada make sure you set your time an hour ahead.