Daylight saving time explained

POSTED: 09:22 AM PDT Nov 04, 2011    UPDATED: 10:06 AM PST Mar 05, 2015 

Daylight saving time begins this weekend. What's behind the tradition of pushing our clocks ahead each spring?

Savings Time - 10
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The changes went into effect in 2007 and were meant to save electricity, although a U.S. Department of Energy study estimated a savings of less than 1 percent of the country's annual energy consumption.


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