The Daylight Savings Time beings on March 8th 2009 and ends November 2nd 2009. If you are in The United States, Canada, The United Kingdom, Cuba, and France, on March 8, 2009 at 02:00 AM local time move your clock forward to 03:00 AM.
In case you live in Paraguay, move the clock backwards one hour to 11:00 PM local time on March 8, 2009 12:00 MIDNIGHT. If you live in Uruguay, on March 8, 2009 at 02:00 AM move the clock backwards to 01:00 AM.
For those in Argentina. on March 15, 2009 move the clock backwards one hour at 12:00 MIDNIGHT local time to 11:00 PM. Depending on your location in in Chile, you will move the clock backwards on hour on March 15, from 10:00 PM to 9:00 PM or from 12:00 MIDNIGHT to 11:00 PM.
March 28 and 29, April 2, 4, 5, 19, and 23 are all the other dates where clocks need to be moved forward or backward one hour. To view the complete list, and check out where in the world you need to live to move your clock back one hour on April 4 or forward one hour on April 23, click here.
I know it's pretty confusing, hope this helps.