Daylight saving time explained

Published: Nov 04 2011 12:22:25 PM EDT   Updated On: Mar 07 2014 02:00:00 AM EST

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

Savings Time - 1
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Contrary to popular belief, no federal rule mandates that states or territories observe daylight saving time.

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On this Day

  • Titanic wreckage

    Courtesy of NOAA/Institute for Exploration/University of Rhode Island

    On this day: September 1

    The last passenger pigeon dies, World War II begins, the Soviet Union shoots down a Korean airliner, and the wreck of the Titanic is discovered, all on this day.