Public Works and Government Services Canada
Symbol of the Government of Canada

Important notice

Good news! We have updated our writing tools. Writing Tips and The Canadian Style have been combined to create a new tool called Writing Tips Plus.

Don’t forget to update your bookmarks. Within a few weeks, Writing Tips will no longer be available.

Search Canada.ca
To begin your search, go to the alphabetical index below and click on the first letter of the word you are searching for.

Eastern Daylight Time, Eastern Standard Time, EDT, EST

From April to October, Eastern Daylight Time is observed in most of Ontario, Quebec and parts of Nunavut. From October to April, Eastern Standard Time is in effect. The name of the time zone is abbreviated when a specific time is stated; otherwise it is written out in full. The abbreviations EDT and EST are written in upper case, with no periods. Time zones may be stated with either the 12-hour or 24-hour system (e.g. 3:15 a.m. EDT or 03:15 EDT).

  • Many television schedules are based on Eastern Standard Time, because Toronto and New York were the first production centres.
  • The fireworks will begin at 11:15 p.m. EDT.
  • The lion cubs were born at 04:45 EST and were shown to the public at noon.