Atlantic Standard Time Zone
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The Atlantic Standard Time Zone (AST) is a geographic region that keeps time by subtracting four hours from Coordinated Universal Time (UTC), resulting in UTC-4. The clock time in this zone is based on the mean solar time of the 60th degree meridian west of the Greenwich Observatory.
In Canada, the provinces of New Brunswick, Prince Edward Island, Nova Scotia, and small portions of Quebec (eastern Côte-Nord and the Magdalen Islands) are part of the Atlantic Standard Time Zone. Officially, the entirety of Labrador is also in the Atlantic Standard Time Zone; however, the southeastern tip of that region unofficially uses Newfoundland Standard Time, the time used on the island of Newfoundland.
Other parts of the world that keep time by subtracting four hours from UTC include Bermuda, in the North Atlantic; many Caribbean islands, including Puerto Rico, the US Virgin Islands; and severalSouth American countries, such as Venezuela, parts of Brazil, Paraguay, Chile and Bolivia.
AST is known as Atlantic Daylight Time (ADT) during daylight saving time, and has one hour added to make it three hours behind UTC (UTC-3). In the southern hemisphere, it will be winter when the northern hemisphere is experiencing summer.
[edit] Major metropolitan areas
- Asunción, Paraguay
- Barquisimeto, Venezuela
- Bridgetown, Barbados
- Cape Breton Regional Municipality, Nova Scotia
- Caracas, Venezuela
- Charlotte Amalie, U.S. Virgin Islands
- Charlottetown, Prince Edward Island
- Ciudad Guayana, Venezuela
- Fredericton, New Brunswick
- Georgetown, Guyana
- Halifax, Nova Scotia
- Hamilton, Bermuda
- La Paz, Bolivia
- Manaus, Brazil
- Maracaibo, Venezuela
- Maracay, Venezuela
- Moncton, New Brunswick
- Oranjestad, Aruba
- Port of Spain, Trinidad and Tobago
- Saint John, New Brunswick
- San Juan, Puerto Rico
- Santiago, Chile
- Santo Domingo, Dominican Republic
- Sucre, Bolivia
- Summerside, Prince Edward Island
- Valencia, Venezuela
- Willemstad, Netherlands Antilles
[edit] See also
- Time zone
- Hawaii-Aleutian Standard Time Zone
- Alaska Standard Time Zone
- Pacific Standard Time Zone
- Mountain Standard Time Zone
- Central Standard Time Zone
- Eastern Standard Time Zone
- Newfoundland Standard Time Zone
[edit] Sources
- World time zone map
- U.S. time zone map
- History of U.S. time zones and UTC conversion
- 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)
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|---|---|---|---|
| −12 | −11 | −10 | −9:30 | −9 | −8 | −7 | −6 | −5 | −4 | −3:30 | −3 | −2:30 | −2 | −1 | -0:44 | -0:25 | UTC (0) | +0:20 | +0:30 | +1 | +2 | +3 | +3:30 | +4 | +4:30 | +4:51 | +5 | +5:30 | +5:40 | +5:45 | +6 | +6:30 | +7 | +7:20 | +7:30 | +8 | +8:30 | +8:45 | +9 | +9:30 | +10 | +10:30 | +11 | +11:30 | +12 | +12:45 | +13 | +13:45 | +14 | |||
| * Northern hemisphere countries or territories observing daylight saving time (DST) ** Southern hemisphere countries or territories observing daylight saving time (DST) |
