Daylight Saving Time began in the U.S. Sunday, March 11, 2012 at 2 a.m. It and ends Sunday, November 4, 2012, 2 a.m.
Unless you live in Arizona or Hawaii, you should move your clocks ahead one hour in spring and back one hour in fall. "Spring forward, fall back."
DST used to start later in the year. Starting in 2007, Daylight Saving Tme begins on the second Sunday in March and ends on the first Sunday in November. On the second Sunday in March, clocks are set ahead one hour at 2 a.m. local standard time, which becomes 3 a.m. local daylight time. On the first Sunday in November, clocks are set back one hour at 2 a.m. local daylight time, which becomes 1 a.m. local standard time. These dates were established by Congress in the Energy Policy Act of 2005.
Indiana just started using Daylight Saving Time in 2006.
For more info, visit: http://aa.usno.navy.mil/faq/docs/daylight_time.php