UTC−04:00
Time zone
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Through Standard time, South America and Labrador
It is observed in the Eastern Time Zone (e.g., in Canada and the United States) during daylight saving time, as Eastern Daylight Time. The Atlantic Time Zone observes it during standard time.
It is observed all year in the Eastern Caribbean and several South American countries.
As standard time (Northern Hemisphere winter)
Principal cities: Halifax, Saint John, Fredericton, Hamilton
North America
- Canada – Atlantic Time Zone
- New Brunswick
- Newfoundland and Labrador
- Labrador
- Except the area between L'Anse-au-Clair and Norman Bay
- Labrador
- Nova Scotia
- Prince Edward Island
- Denmark
- Greenland
- Pituffik (Thule) (former settlement), Qaanaaq (present settlement)
- Greenland
- United Kingdom
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As daylight saving time (Northern Hemisphere summer)
Principal cities: New York, Washington, Philadelphia, Boston, Atlanta, Miami, Detroit, Baltimore, Cleveland, Pittsburgh, Indianapolis, Orlando, Charlotte, Charleston, Wilmington, Key West, Toronto, Montreal, Ottawa, Quebec City, Iqaluit, Nassau, Havana, Kingston, Port-au-Prince, Cockburn Town, Providenciales
North America
- Canada (Eastern Time Zone)
- United States (Eastern Time Zone)
- Delaware
- District of Columbia
- Florida
- Entire state except the counties of Bay, Calhoun, Escambia, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and Washington, and northern Gulf county (panhandle)
- Georgia
- Indiana
- Except the northwestern counties of Jasper, Lake, LaPorte, Newton, Porter and Starke, and the southwestern counties of Gibson, Perry, Posey, Spencer, Vanderburgh and Warrick
- Kentucky
- Counties to the east of the counties of Breckinridge, Grayson, Hart, Green, Adair, Russell and Clinton
- Maryland
- Michigan
- Except the western counties of Dickinson, Gogebic, Iron and Menominee
- New England (states of Connecticut, Massachusetts, Maine, New Hampshire, Rhode Island and Vermont)
- New Jersey
- New York
- North Carolina
- Ohio
- Pennsylvania
- South Carolina
- Tennessee
- The counties of Scott, Morgan, Roane, Rhea, Meigs and Bradley, and all counties to the east of these
- Virginia
- West Virginia
Caribbean
- Bahamas
- Cuba
- Dominican Republic
- Haiti
- United Kingdom
As standard time (year-round)
Principal cities: Caracas, Manaus, La Paz, Georgetown, Santa Cruz de la Sierra, St. John's, Bridgetown, Roseau, Santo Domingo, Gustavia, St. George's, The Bottom, Oranjestad, Philipsburg, Lower Prince's Quarter, Basseterre, Castries, Kingstown, Port of Spain, San Fernando, The Valley, Road Town, Plymouth, Brades, Little Bay, San Juan, Charlotte Amalie, Oranjestad, Kralendijk, Willemstad, Pointe-à-Pitre, Les Abymes, Fort-de-France, Maracaibo, Blanc-Sablon, Harrington Harbour
South America
- Bolivia
- Brazil
- The states of Amazonas (except westernmost municipalities), Mato Grosso, Mato Grosso do Sul, Rondônia and Roraima
- Guyana
- Venezuela (since 2016)
Eastern Caribbean
- Antigua and Barbuda
- Barbados
- Dominica
- Dominican Republic
- France
- Guadeloupe
- Basse-Terre
- Grande-Terre
- Les Saintes
- Marie-Galante
- La Désirade
- Martinique
- Saint Barthélemy
- Saint Martin
- Guadeloupe
- Grenada
- Carriacou and Petite Martinique
- Netherlands
- Saint Kitts and Nevis
- Saint Lucia
- Saint Vincent and the Grenadines
- Saint Vincent
- The Grenadines
- Trinidad and Tobago
- United Kingdom
- Anguilla
- British Virgin Islands
- Tortola
- Virgin Gorda
- Anegada
- Jost Van Dyke
- Montserrat
US territories
- United States
- Puerto Rico
- United States Virgin Islands
- Saint Croix
- Saint Thomas
- Saint John
- Water Island
Other Caribbean locales
North America
- Canada – Atlantic Time Zone
- Quebec
- East of the 63°W longitude (Le Golfe-du-Saint-Laurent Regional County Municipality)
- Quebec
Antarctica
Southern Ocean
- Some bases in Antarctica. See also Time in Antarctica
- Brazil
- Comandante Ferraz Antarctic Station
- Russia
- Bellingshausen Station
- Brazil
As standard time (Southern Hemisphere winter)
Principal cities: Santiago
South America
- Chile (except Easter Island and Magallanes/Antarctic)
Antarctica
- Some bases in Antarctica. See also Time in Antarctica