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Saturday
Nov052011

Remember to set your Clocks Back

Medioimages/Photodisc/Thinkstock(NEW YORK) -- Yes it's that time again. Remember to set your clocks back one hour when you go to bed Saturday night because Daylight Saving Time ends at 2 a.m. on Sunday.

The seven-month period of daylight saving time is mandated by governments which began implementing the time switch during World Wars I and II to save energy and resources for the war effort. From World War II until recently, daylight saving in the U.S. ran from April until mid-October.

But in 2007, Congress adjusted saving time to begin three weeks earlier and end one week later, a move they hoped would help save energy. At the time, they pointed to the fact that longer daylight in the evening hours reduced people's need to turn on lights in their homes at night.

Critics of the policy questioned the government's decision, wondering whether people would simply turn on as many lights in the morning hours instead. In response, the Department of Energy studied the energy savings in 2008. They found that during that period, U.S. electricity use decreased by 0.5 percent per day, which added up to 1.3 billion kilowatt-hours, enough to power about 122,000 average U.S. homes for a year.

Now, as daylight saving time comes to its November close, energy use will rise again as the sun sets earlier in the evening.

In the early morning hours of Sunday, Nov. 6, the clocks will be set back an hour, from 2 a.m. to 1 a.m. For an individual who goes to bed at 10 p.m. on Saturday night and awakens eight hours later, they will wake up at 5 a.m. on Sunday morning. It will still be dark, of course, but the sun will come earlier than normal, at 6:30 a.m.

Copyright 2011 ABC News Radio

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