Contents 1 As Standard Time (all year round) 2 As Standard Time (Northern Hemisphere winter) 3 As Standard Time (Southern Hemisphere winter) 4 As DST Time (Northern Hemisphere Summer)

UTC-4: Blue (December), Orange (June), Yellow (all year round), Light Blue - Sea areas

UTC−4 is the time offset used in the Atlantic Standard Time Zone in Canada in winter and the North American Eastern Time Zone during daylight saving time (DST), in the Caribbean region this is considered as the Eastern Caribbean (ECT) timezone. There are possibly other various names in other countries.

As Standard Time (all year round)

ECT - Eastern Caribbean Time Zone

•  Anguilla (UK)
•  Antigua and Barbuda
•  Barbados
•  Dominica
•  Grenada
•  Montserrat (UK)
•  Saint Kitts and Nevis
•  Saint Lucia
•  Saint Vincent and the Grenadines
•  Trinidad and Tobago
•  British Virgin Islands (UK)
•  U.S. Virgin Islands (US) (AST——Atlantic Standard Time)

Other Caribbean

•  Aruba (Netherlands)
•  Dominican Republic
•  Guadeloupe (France)
•  Martinique (France)
•  Netherlands Antilles (Netherlands)
•  Puerto Rico (USA) (AST—Atlantic Standard Time)

South America

•  Bolivia
•  Guyana
•  Brazil - Acre, Amazonas, Rondônia, Roraima

North America

•  Canada - Quebec (east of the 63°W longitude)

As Standard Time (Northern Hemisphere winter)

AST—Atlantic Standard Time

•  Bermuda (UK)
•  Canada
  • all of  New Brunswick,  Nova Scotia,  Prince Edward Island
  •  Newfoundland and Labrador - most of Labrador
•  Greenland (Denmark) (Kalaallit Nunaat)- northwestern (observes United States daylight saving time rules)

As Standard Time (Southern Hemisphere winter)

•  Brazil — Mato Grosso, Mato Grosso do Sul
•  Chile — Mainland
•  Falkland Islands (UK)
•  Paraguay

As DST Time (Northern Hemisphere Summer)

North American Eastern Time Zone during daylight saving time

•  Canada
  •  Nunavut (eastern), most of  Ontario and most of  Quebec
•  United States
  • all of  Connecticut, Delaware,  District of Columbia,  Georgia (U.S. state),  Maine,  Maryland, Massachusetts,  New Hampshire,  New Jersey, New York,  North Carolina,  Ohio,  Pennsylvania,  Rhode Island,  South Carolina,  Vermont,  Virginia,  West Virginia
  • most of  Florida,  Indiana,  Michigan
  • Eastern parts of  Kentucky,  Tennessee