Per the Energy Policy Act of 2005, this began March 11, 2007, 3 weeks earlier than in 2006
... Clocks will go forward an hour a 
week earlier than usual - on the last ..... Energy Policy Act of 2005 [DOC] [TLE] History of time in the United States - Wikipedia [PAR] The history of standard time in the United States began November 18, 1883, 
when United States and Canadian railroads instituted standard time in time 
zones.