The U.S. Energy Policy Act of 2005 Extends Daylight Saving Time by Four Weeks

The federal Energy Policy Act (EPAct) of 2005, which was signed into law on August 8, 2005, extends the duration of daylight saving time (DST) by four weeks. Under the previous rules, daylight saving time would have started on Sunday, April 1, 2007 and ended on Sunday, October 28, 2007. Under section 110 of the EPAct, which amends the Uniform Time Act of 1966, daylight saving time begins three weeks earlier on Sunday, March 11, 2007 and ends one week later on Sunday, November 4, 2007. To comply with daylight saving time in the United States, clocks must be set forward by one hour in the spring and back by one hour in the fall, at 2:00 a.m.

Extended DST is slated to continue in 2008 but the U.S. Congress has reserved the right to return DST to the previous schedule after evaluating the effects of the changes in 2007.

For more information about the Energy Policy Act, visit the U.S. Department of Energy's web site.