DAYLIGHT SAVING TIME
USA and Canada past and future DST schedules hereDaylight Saving 2020
Atlantic Daylight Time is the Atlantic Time Zone of the United States of America (USA) and Canada. Atlantic Standard Time (AST) is 4 hours behind Greenwich Mean Time (GMT-4).
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 ADT; which is 3 hours behind Greenwich Mean Time (GMT-3).
After the Summer months Atlantic Time is shifted back by 1 hour to Atlantic Standard Time (EST) or (GMT-4).