updated 4/1/2006 4:21:42 PM ET 2006-04-01T21:21:42

The good news is an extra hour of sunlight every day just as spring begins to bloom. And the bad news isn’t that bad, just an hour’s less sleep or a curtailed night of revelry.

Pushing the clock forward by 60 minutes during the wee hours of Sunday — at 2 a.m. local time, officially — signals daylight-saving time and, unofficially, an end to winter.

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

Daylight-saving time ends Oct. 29.

President Bush has signed a law changing the dates of daylight-saving time, effective in 2007. Then, daylight time will start three weeks earlier, March 11, and will end one week later, Nov. 4.

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