UTC−4

UTC−4 is a time offset that subtracts 4 hours from Coordinated Universal Time (UTC). It is used in several countries and regions around the world as a standard time, not just during daylight savings.

Overview

UTC−4 is used in the Eastern Time Zone of North America during daylight saving time and by several other places year round. It is also known as Atlantic Standard Time (AST) in Atlantic Canada and the Atlantic Time Zone of the United States.

Regions Using UTC−4 Year Round

Several regions use UTC−4 as their standard time throughout the year. These include parts of Canada, parts of the United States, and several countries in South America.

Canada

In Canada, Atlantic Standard Time is used by the provinces of New Brunswick, Prince Edward Island, Nova Scotia, and Labrador (except the southeastern tip).

United States

In the United States, the Atlantic Time Zone applies to Puerto Rico and the U.S. Virgin Islands.

South America

In South America, countries that use UTC−4 as their standard time include Bolivia, Guyana, Paraguay, Venezuela, and parts of Brazil.

Regions Using UTC−4 During Daylight Saving Time

Several regions use UTC−4 as their standard time during daylight saving time. These include parts of the United States and Canada.

United States

In the United States, the Eastern Time Zone uses UTC−4 during daylight saving time. This includes states on the east coast, such as New York, Florida, and Georgia.

Canada

In Canada, the Eastern Time Zone also uses UTC−4 during daylight saving time. This includes the provinces of Ontario and Quebec.

See Also

• Coordinated Universal Time
• Time zone
• Daylight saving time
• Eastern Time Zone
• Atlantic Standard Time