Atlantic Time Zone
|Atlantic Time Zone|
|Observance of DST|
|DST is observed in certain regions of this time zone between the 2nd Sunday in March and the 1st Sunday in November.|
|DST began||Mar 12, 2017|
|DST ends||Nov 5, 2017|
The Atlantic Time Zone is a geographical region that keeps standard time—called Atlantic Standard Time (AST)—by subtracting four hours from Coordinated Universal Time (UTC), resulting in UTC-4; during part of the year some parts of it observe daylight saving time by instead subtracting only three hours (UTC-3). The clock time in this zone is based on the mean solar time of the 60th meridian west of the Greenwich Observatory.
In Canada, the provinces of New Brunswick, Nova Scotia, and Prince Edward Island reckon time specifically as an offset of 4 hours from Greenwich Mean time (GMT-4). Small portions of Quebec (eastern Côte-Nord and the Magdalen Islands) are also part of the Atlantic Standard Time Zone. Officially, the entirety of Newfoundland and Labrador observes Newfoundland Standard Time, but in practice most of Labrador uses the Atlantic Standard Time Zone.
No portion of the continental United States is located in the Atlantic Time Zone; however the territories of Puerto Rico and the U.S. Virgin Islands do fall under Atlantic Standard Time. A Massachusetts commission and other New England states are studying the possibility of changing to Atlantic Time year round.
- Antigua and Barbuda (No DST)
- Barbados (No DST)
- Bolivia (No DST)
- Canada, in the following areas:
- Chile (except Magallanes region and Antarctic territory)
- Dominica (No DST)
- Dominican Republic (No DST)
- France, in the following areas:
- Greenland, in the following area:
- Grenada (No DST)
- Guyana (No DST)
- Netherlands, in the following areas:
- Saint Kitts and Nevis (No DST)
- Saint Lucia (No DST)
- Saint Vincent and the Grenadines (No DST)
- Trinidad and Tobago (No DST)
- The British Overseas Territories, in the following areas:
- The United States, in the following areas:
- Venezuela (No DST)
- "CHAPTER T-6 – Time Definition Act" (PDF). Archived from the original (PDF) on 2008-12-07. Retrieved 2012-09-11.
- "Time Definition Act". Archived from the original on 5 June 2008. Retrieved 2008-06-02.
- "RSNL1990 CHAPTER S-23 – STANDARD TIME ACT". Retrieved 2007-11-16.
- "Is it time for Mass. to move to a new time zone? - The Boston Globe". BostonGlobe.com. Retrieved 2017-03-17.
- World time zone map
- U.S. time zone map
- History of U.S. time zones and UTC conversion dead link
- Canada time zone map
- Time zones for major world cities
- Official times across Canada
- The official U.S. time for the Atlantic Time Zone (no DST) dead link
Time zones in North America
|Time zone||Hours from UTC: Standard time||Hours from UTC: Daylight saving time|
|Hawaii–Aleutian (in Hawaii)||–10||–10|
|Hawaii–Aleutian (in Alaska)||–10||–9|
|Mountain (Arizona and Sonora only)||–7||–7|
|Mountain (other states)||–7||–6|
|Central (Saskatchewan only)||–6||–6|
|Central (other states)||–6||–5|
|Eastern (Southampton Island,Atikokan and New Osnaburgh/Pickle Lakeonly)||–5||–5|
|Eastern (other states)||–5||–4|
|Atlantic (Natashquan River)||–4||–4|
|Atlantic (other states)||–4||–3|
|Saint Pierre and Miquelon
and most of Greenland