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(AP) -- It's time to check the clocks once again.
Most of America switches to daylight-saving time this weekend, shifting an hour of light to the evening.
Clocks move ahead one hour at 2 am Sunday, local time. The change provides an extra hour of light in the evening for warm-weather outdoor activities.
Standard time returns the last Sunday in October.
Federal law does not require any area to observe daylight-saving time, and a few parts of the country have opted not to do so. They are Arizona, Hawaii and part of Indiana.
(Copyright 2005 by The Associated Press. All Rights Reserved.)
