Daylight saving time explained

Published On: Nov 04 2011 11:22:25 AM CDT   Updated On: Oct 30 2015 09:59:43 AM CDT

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

Savings Time - 9
9 / 11
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.

Upload Photos / Videos