From mid-March to early November, Mountain Daylight Time is observed in Alberta, the Northwest Territories and parts of Nunavut. From early November to mid-March, Mountain 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 MDT and MST 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. MDT or 03:15 MDT).
- With its midnight sun in June, Yellowknife hardly needs to observe Mountain Daylight Time.
- Please be ready for the conference call from Edmonton at 8:30 a.m. MST.
- Having left Jasper at 15:30 MDT, the train will pull into Vancouver’s Pacific Central Station at 07:51 PDT.
Copyright notice for Writing Tips Plus
© His Majesty the King in Right of Canada, represented by the Minister of Public Services and Procurement
A tool created and made available online by the Translation Bureau, Public Services and Procurement Canada
Search by related themes
Want to learn more about a theme discussed on this page? Click on a link below to see all the pages on the Language Portal of Canada that relate to the theme you selected. The search results will be displayed in Language Navigator.
Related links
- Writing Tips Plus (home page)
- Writing tools
- Language Navigator (for fast access to language tips)
- TERMIUM Plus®