Clocks were set back an hour on November 2, 2014, at 2 a.m. to mark the end of Daylight Saving Time (DST). Clocks were initially set an hour ahead on March 9, 2014, at 2 a.m.
DST was first conceptualized by Benjamin Franklin to achieve longer daylight during the evening hours and minimize energy consumption. As of 2015, Hawaii and most of Arizona remain the only two states that do not observe DST in the United States.
Under the Energy Policy Act of 2005, those who practice DST in the United States adjust their clocks an hour ahead of standard time on the second Sunday in March, which is nearly concurrent with the onset of spring. The clocks are again readjusted and turned back an hour on the first Sunday in November.