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Daylight saving time explained

Published On: Nov 04 2011 11:22:25 AM CDT   Updated On: Mar 07 2014 01:00:00 AM CST

What's behind the tradition of turning our clocks ahead each spring?

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Daylight saving time was observed nationally again during World War II, but not uniformly practiced until 1966, when start and end dates were standardized. States could still opt out if they wished.

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