Time to fall back: Daylight Saving Time Published Oct. 30, 2009 By Staff Reports Public Affairs DOBBINS AIR RESERVE BASE, Ga. -- Daylight Saving Time officially ends at 2 a.m. Nov. 1 when clocks are set back by one hour. That means you end up with an extra hour of sleep that night ... or trick or treating. With the changing of household clocks Nov. 1, it's also a great time to change the batteries in home smoke alarms and carbon monoxide detectors. Smoke alarms and carbon monoxide detectors can make the difference between life and death in the event of a fire or carbon monoxide leak in your home. Also check the clocks in your computers, DVD players and microwaves in case they don't automatically adjust the time. The change to Daylight Saving Time allows us to use less energy in lighting our homes by taking advantage of the longer and later daylight hours. Daylight Saving Time was instituted in the United States during World Wars I and II in order to save energy for war production by taking advantage of the later hours of daylight between April and October. In 1966, Congress passed the Uniform Time Act which standardized the length of Daylight Saving Time.