Atlantic Standard Time Zone
Encyclopedia
UTC-4
UTC−04-00 is an identifier for a time offset from UTC of −04.This offset is used in the Atlantic Standard Time Zone in Canada and the North American Eastern Time Zone during daylight saving time , in the Caribbean region this is considered as the Eastern Caribbean timezone...
or GMT-4. The clock time in this zone is based on the mean solar time of the 60th meridian west
60th meridian west
The meridian 60° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Greenland, North America, the Atlantic Ocean, South America, the Southern Ocean, and Antarctica to the South Pole....
of the Greenwich Observatory.
In Canada
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...
, the provinces of New Brunswick
New Brunswick
New Brunswick is one of Canada's three Maritime provinces and is the only province in the federation that is constitutionally bilingual . The provincial capital is Fredericton and Saint John is the most populous city. Greater Moncton is the largest Census Metropolitan Area...
and Nova Scotia
Nova Scotia
Nova Scotia is one of Canada's three Maritime provinces and is the most populous province in Atlantic Canada. The name of the province is Latin for "New Scotland," but "Nova Scotia" is the recognized, English-language name of the province. The provincial capital is Halifax. Nova Scotia is the...
reckon time specifically as an offset of 4 hours from Greenwich Mean time (GMT-4). (UTC is regularly adjusted by means of leap seconds to keep it synchronized to within 1 second of GMT.) Prince Edward Island
Prince Edward Island
Prince Edward Island is a Canadian province consisting of an island of the same name, as well as other islands. The maritime province is the smallest in the nation in both land area and population...
and small portions of Quebec
Quebec
Quebec or is a province in east-central Canada. It is the only Canadian province with a predominantly French-speaking population and the only one whose sole official language is French at the provincial level....
(eastern Côte-Nord
Côte-Nord
Côte-Nord is the second largest administrative region by land area in Quebec, Canada, after Nord-du-Québec...
and the Magdalen Islands
Magdalen Islands
The Magdalen Islands form a small archipelago in the Gulf of Saint Lawrence with a land area of . Though closer to Prince Edward Island and Nova Scotia, the islands form part of the Canadian province of Quebec....
) are also part of the Atlantic Standard Time Zone. Officially, the entirety of Newfoundland and Labrador
Newfoundland and Labrador
Newfoundland and Labrador is the easternmost province of Canada. Situated in the country's Atlantic region, it incorporates the island of Newfoundland and mainland Labrador with a combined area of . As of April 2011, the province's estimated population is 508,400...
observes Newfoundland Standard Time, but in practice most of Labrador
Labrador
Labrador is the distinct, northerly region of the Canadian province of Newfoundland and Labrador. It comprises the mainland portion of the province, separated from the island of Newfoundland by the Strait of Belle Isle...
uses the Atlantic Standard Time Zone.
For other parts of the world that keep time by subtracting four hours from UTC see UTC−04.
Those portions of the Atlantic Standard Time Zone that participate in daylight saving time
Daylight saving time
Daylight saving time —also summer time in several countries including in British English and European official terminology —is the practice of temporarily advancing clocks during the summertime so that afternoons have more daylight and mornings have less...
do so as Atlantic Daylight Time (ADT), which has one hour added to make it only three hours behind GMT (UTC-3
UTC-3
UTC−03:00 is an identifier for a time offset from UTC of −03:00.-As standard time :*Suriname*Falkland Islands*French Guiana*Brazil - East Northern and Northeastern States...
).
Major metropolitan areas
- HamiltonHamilton, BermudaHamilton is the capital of the British Overseas Territory of Bermuda. It is the territory's financial centre and a major port and tourist destination.-Geography:...
, BermudaBermudaBermuda is a British overseas territory in the North Atlantic Ocean. Located off the east coast of the United States, its nearest landmass is Cape Hatteras, North Carolina, about to the west-northwest. It is about south of Halifax, Nova Scotia, Canada, and northeast of Miami, Florida...
, United KingdomUnited KingdomThe United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages... - Cape Breton Regional MunicipalityCape Breton Regional Municipality, Nova ScotiaCape Breton Regional Municipality often shortened to simply CBRM, is a regional municipality in Nova Scotia's Cape Breton County.According to the 2006 Census of Canada, the population within the Cape Breton Regional Municipality is 102,250...
, Nova ScotiaNova ScotiaNova Scotia is one of Canada's three Maritime provinces and is the most populous province in Atlantic Canada. The name of the province is Latin for "New Scotland," but "Nova Scotia" is the recognized, English-language name of the province. The provincial capital is Halifax. Nova Scotia is the...
, CanadaCanadaCanada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean... - CharlottetownCharlottetownCharlottetown is a Canadian city. It is both the largest city on and the provincial capital of Prince Edward Island, and the county seat of Queens County. Named after Queen Charlotte, the wife of George III, Charlottetown was first incorporated as a town in 1855 and designated as a city in 1885...
, Prince Edward IslandPrince Edward IslandPrince Edward Island is a Canadian province consisting of an island of the same name, as well as other islands. The maritime province is the smallest in the nation in both land area and population...
, CanadaCanadaCanada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean... - Fredericton, New BrunswickNew BrunswickNew Brunswick is one of Canada's three Maritime provinces and is the only province in the federation that is constitutionally bilingual . The provincial capital is Fredericton and Saint John is the most populous city. Greater Moncton is the largest Census Metropolitan Area...
, CanadaCanadaCanada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean... - Halifax Regional Municipality, Nova ScotiaNova ScotiaNova Scotia is one of Canada's three Maritime provinces and is the most populous province in Atlantic Canada. The name of the province is Latin for "New Scotland," but "Nova Scotia" is the recognized, English-language name of the province. The provincial capital is Halifax. Nova Scotia is the...
, CanadaCanadaCanada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean... - Moncton, New BrunswickNew BrunswickNew Brunswick is one of Canada's three Maritime provinces and is the only province in the federation that is constitutionally bilingual . The provincial capital is Fredericton and Saint John is the most populous city. Greater Moncton is the largest Census Metropolitan Area...
, CanadaCanadaCanada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean... - Port of SpainPort of SpainPort of Spain, also written as Port-of-Spain, is the capital of the Republic of Trinidad and Tobago and the country's third-largest municipality, after San Fernando and Chaguanas. The city has a municipal population of 49,031 , a metropolitan population of 128,026 and a transient daily population...
, Trinidad and TobagoTrinidad and TobagoTrinidad and Tobago officially the Republic of Trinidad and Tobago is an archipelagic state in the southern Caribbean, lying just off the coast of northeastern Venezuela and south of Grenada in the Lesser Antilles...
[No DST] - Saint JohnSaint John, New BrunswickCity of Saint John , or commonly Saint John, is the largest city in the province of New Brunswick, and the first incorporated city in Canada. The city is situated along the north shore of the Bay of Fundy at the mouth of the Saint John River. In 2006 the city proper had a population of 74,043...
, New BrunswickNew BrunswickNew Brunswick is one of Canada's three Maritime provinces and is the only province in the federation that is constitutionally bilingual . The provincial capital is Fredericton and Saint John is the most populous city. Greater Moncton is the largest Census Metropolitan Area...
, CanadaCanadaCanada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean... - SummersideSummerside, Prince Edward IslandSummerside is a Canadian city in Prince County, Prince Edward Island. It is the second largest city in the province and the principal municipality for the western part of the island.- History :...
, Prince Edward IslandPrince Edward IslandPrince Edward Island is a Canadian province consisting of an island of the same name, as well as other islands. The maritime province is the smallest in the nation in both land area and population...
, CanadaCanadaCanada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean... - Santo DomingoSanto DomingoSanto Domingo, known officially as Santo Domingo de Guzmán, is the capital and largest city in the Dominican Republic. Its metropolitan population was 2,084,852 in 2003, and estimated at 3,294,385 in 2010. The city is located on the Caribbean Sea, at the mouth of the Ozama River...
, Dominican RepublicDominican RepublicThe Dominican Republic is a nation on the island of La Hispaniola, part of the Greater Antilles archipelago in the Caribbean region. The western third of the island is occupied by the nation of Haiti, making Hispaniola one of two Caribbean islands that are shared by two countries...
[No DST] - San JuanSan Juan, Puerto RicoSan Juan , officially Municipio de la Ciudad Capital San Juan Bautista , is the capital and most populous municipality in Puerto Rico, an unincorporated territory of the United States. As of the 2010 census, it had a population of 395,326 making it the 46th-largest city under the jurisdiction of...
, Puerto RicoPuerto RicoPuerto Rico , officially the Commonwealth of Puerto Rico , is an unincorporated territory of the United States, located in the northeastern Caribbean, east of the Dominican Republic and west of both the United States Virgin Islands and the British Virgin Islands.Puerto Rico comprises an...
, United StatesUnited StatesThe United States of America is a federal constitutional republic comprising fifty states and a federal district...
[No DST]