Sunday 8 March 2015 2am local time
until Sunday 1 November 2015 2am local time
see: Daylight-Saving-Time.com for details
USA and Canada Standard Time Date schedules here
Eastern Daylight Time is the Eastern Time Zone of the United States of America (USA) and Canada. Eastern Standard Time (EST) is 5 hours behind Greenwich Mean Time (GMT-5).
In most states in the USA and in most provinces in Canada, Daylight-Saving Time (DST) is observed. During DST the time is shifted forward by 1 hour to EDT; which is 4 hours behind Greenwich Mean Time (GMT-4).
After the Summer months Eastern Time is shifted back by 1 hour to US Eastern Standard Time (EST) or (GMT-5).