Daylight saving time explained

Published On: Nov 04 2011 11:22:25 AM CDT   Updated On: Mar 05 2015 12:06:33 PM CST

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

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Rita Mezzela/SXC

In 2005, Congress pushed the start of daylight saving time forward three weeks to the second Sunday in March, rather than the first Sunday in April, and moved the end back one week to the first Sunday in November.

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