Eastern Standard Time in Autumn-Winter is 5 hours behind Coordinated Universal Time .
Eastern Daylight Time ( EDT ) , when observing daylight saving time DST ( spring/summer ) , is 4 hours behind Coordinated Universal Time ( UTC−04:00 ) .In the northern parts of the time zone , on the second Sunday in March , at 2:00 a.m. EST , clocks are advanced to 3:00 a.m. EDT leaving a one-hour `` gap '' .
Eastern Time Zone