Daylight Saving Time makes our clocks "Spring forward" and "Fall back. CNN's Jennifer Gray explains why. <script type='text/javascript' src='http://z.cdn.turner.com/cnn/van/resources/scripts/van-widgets.js'></script> <div data-cnnvansinglewidget data-affiliate='gantdaily' data-videoid='weather/2015/10/30/daylight-saving-jennifer-gray-explainer-orig.cnn' data-size='auto' data-autostart='true'></div>