Daylight saving time explained

Published On: Nov 04 2011 11:22:25 AM CDT   Updated On: Oct 31 2014 09:19:18 AM CDT

Daylight saving time ends this weekend. What's behind the tradition of turning our clocks back each fall?

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The idea of daylight saving time was introduced nationwide in 1918, when Congress formally approved the time zones the U.S. railroad industry had been following since 1883, according to National Geographic.

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