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 from 2016 and other New England states have been studying the possibility of changing to Atlantic Time year round.
Those portions of the Atlantic Time Zone that participate in daylight saving time do so as Atlantic Daylight Time (ADT), which has one hour added to make it only three hours behind GMT (UTC-3).
Video Atlantic Time Zone
Areas covered
- Antigua and Barbuda (No DST)
- Barbados (No DST)
- Brazil
- Amazonas (except southwestern portion), Rondônia, Roraima (No DST)
- Mato Grosso, Mato Grosso do Sul
- Bolivia (No DST)
- Canada, in the following areas:
- Nova Scotia
- New Brunswick
- Prince Edward Island
- Most of Labrador
- Magdalen Islands, Quebec
- Côte-Nord (east of the 63rd meridian), Quebec
- Chile (except Magallanes region and Antarctic territory)
- Dominica (No DST)
- Dominican Republic (No DST)
- France, in the following areas:
- Guadeloupe (No DST)
- Martinique (No DST)
- Saint-Barthélemy (No DST)
- Saint-Martin (No DST)
- Greenland, in the following area:
- Thule Air Base
- Grenada (No DST)
- Guyana (No DST)
- Netherlands, in the following areas:
- Aruba (No DST)
- Bonaire (No DST)
- Curaçao (No DST)
- Saba (No DST)
- Sint Eustatius (No DST)
- Sint Maarten (No DST)
- Paraguay
- 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:
- Anguilla (No DST)
- Bermuda
- British Virgin Islands (No DST)
- Montserrat (No DST)
- Turks and Caicos Islands (No DST)
- The United States, in the following areas:
- Puerto Rico (No DST)
- United States Virgin Islands (No DST)
- Venezuela (No DST)
Maps Atlantic Time Zone
See also
- Daylight saving time in the Americas
References
External links
- 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
Source of the article : Wikipedia
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