updated 3/30/2006 3:36:59 PM ET 2006-03-30T20:36:59

Millions of Americans will lose an hour’s sleep Saturday night as clocks are turned ahead to daylight-saving time.

Other people will forget and be an hour late for church or other activities.

Officially clocks should be moved ahead one hour at 2 a.m. Sunday. Most folks will do the job before hitting the sack.

The lost hour will return Oct. 29 when clocks go back to standard time.

Congress has passed a law changing the dates of daylight-saving time, but it doesn’t take effect until 2007. Then daylight time will start three weeks earlier, March 11, and will end one week later, Nov. 4.

Residents of some parts of the country can ignore all this since daylight-saving time isn’t observed in Arizona, Hawaii, Puerto Rico, the Virgin Islands, American Samoa, Guam and the Northern Marianas.

© 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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