Should I Use Est or Edt?

To remember it correctly, EST is when North Americans live with it during fall and winter. Meanwhile, EDT happens during spring and summer. Just remember the world daylight to connote spring and summer because there are additional daylight hours used during this period.

Is EDT ahead or behind EST?

During DST the time is shifted forward by 1 hour to Eastern Daylight Time (EDT); which is 4 hours behind Greenwich Mean Time (GMT-4). After summer time Eastern Time is shifted back by 1 hour to US Eastern Standard Time (EST) or (GMT-5).

Can EST and EDT be used interchangeably?

EST stands for an Eastern Standard Time, and EDT stands for Eastern Daylight Time. Both Eastern Standard Time and Eastern Daylight Time are used as time zones for the same area. Yet, both of them cannot be used as synonyms.