Clocks will be advanced by 1 hour this Sunday 9 March in the US eastern time zone (EST). The FX trading day ending at 5pm NY time, Dukascopy Market opening and settlement time will be changed from 22:00 GMT to 21:00 GMT effectively this Sunday 9 March 2013.
Clocks will return to Winter schedule on Sunday 2 November.
Source: Dukascopy Bank SA