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The Eastern Time Zone (ET) of the Western Hemisphere falls mostly along the east coast of Northern America and the west coast of South America. Its time offset is UTC-5 during standard time and UTC-4 during daylight saving time. The clock time in this zone is based on the mean solar time of the 75th degree meridian west of the Greenwich Observatory.

In the United States and Canada, this time zone is generally called Eastern Time (ET). Specifically, it is Eastern Standard Time (EST) when observing standard time (Winter), and Eastern Daylight Time (EDT) when observing daylight saving time (Summer).

In some areas, starting in 2007, the local time changes at 02:00 EST to 03:00 EDT on the second Sunday in March and returns at 02:00 EDT to 01:00 EST on the first Sunday in November.

Contents 1 Usage 1.1 North America 1.1.1 Canada 1.1.2 United States 1.1.3 Other countries 1.2 South America 2 Major Metropolitan Areas 3 See also 4 Sources 5 References

In Canada, the following provinces and territories are part of the Eastern Time Zone:

• Ontario (excluding areas west of Thunder Bay but including Atikokan)
• Quebec (excluding far eastern Côte-Nord and the Magdalen Is.)
• East-central Nunavut (including part of Melville Pen. and most of Ellesmere and Baffin Is., including Iqaluit; Southampton Island does not observe DST)

In the United States, the following states are part of the Eastern Time Zone in their entirety:

Connecticut Delaware Georgia Maine Maryland Massachusetts

New Hampshire New Jersey New York North Carolina Ohio Pennsylvania

Rhode Island South Carolina Vermont Virginia West Virginia

Parts of several other states use Eastern Time as well:

• nearly all of Florida except for the west border with Alabama
• most of Indiana (all except the Evansville metropolitan area and the suburbs of Chicago, Illinois)
• all of Kentucky from the Louisville metropolitan area eastward
• all of Michigan except the four Upper Peninsula counties that border Wisconsin (Gogebic, Iron, Dickinson, Menominee)
• the eastern third of Tennessee, almost but not precisely coterminous with the region legally designated as East Tennessee
• some towns in eastern Alabama, including Phenix City, Smiths Station, Lanett, and Valley, observe Eastern Time, although they are officially in the Central Time Zone. This is primarily because they are part of the Columbus, Georgia media market.^[1]

The following countries that use Eastern Time Zone include:

• Mexico - the eastern state of Quintana Roo also followed EST for a brief period in the 1990s
• Panama
• Jamaica
• Haiti
• Cuba
• the Bahamas
• Not all Caribbean countries observe Daylight saving time. Most Eastern Caribbean states are in the UTC-4 timezone, which is known in North America as the Atlantic Time Zone and is the equivalent of EDT and one hour ahead of EST.

In South America this time zone is observed in:

• Colombia
• Ecuador (except Galápagos)
• Peru
• Parts of Brazil:
  • the state of Acre
  • Amazonas - the southwestern region of the state.

Albany, New York Atlanta, Georgia Augusta, Georgia Baltimore, Maryland Barrie, Ontario Bogotá, Colombia Boston, Massachusetts Buffalo, New York Burlington, Vermont Charleston, South Carolina Charleston, West Virginia Charlotte, North Carolina Chattanooga, Tennessee Cincinnati, Ohio Cleveland, Ohio Columbia, South Carolina Columbus, Ohio Detroit, Michigan Erie, Pennsylvania Fort Wayne, Indiana Grand Rapids, Michigan Greater Sudbury, Ontario Greenville, South Carolina Greensboro, North Carolina Guayaquil, Ecuador

Hamilton, Ontario Hampton Roads, Virginia Havana, Cuba Hartford, Connecticut Indianapolis, Indiana Iqaluit, Nunavut Jacksonville, Florida Key West, Florida Kingston, Jamaica Knoxville, Tennessee La Paz, Bolivia Lima, Peru London, Ontario Louisville, Kentucky Manchester, New Hampshire Medellín, Colombia Miami, Florida Montreal, Quebec Nassau, Bahamas New Haven, Connecticut New York, New York Orlando, Florida Ottawa, Ontario Oshawa, Ontario Panama City, Panama

Philadelphia, Pennsylvania Pittsburgh, Pennsylvania Port-au-Prince, Haiti Portland, Maine Providence, Rhode Island Quebec, Quebec Quito, Ecuador Raleigh, North Carolina Richmond, Virginia Rochester, New York Santiago de Cali, Colombia Springfield, Massachusetts Syracuse, New York Tampa, Florida Thunder Bay, Ontario Toledo, Ohio Toronto, Ontario Trenton, New Jersey Washington, D.C. Wilmington, Delaware Windsor, Ontario Worcester, Massachusetts

• Time zone
• Eastern Daylight Time
• Time in Indiana
• Atlantic Standard Time Zone
• Newfoundland Standard Time Zone

• 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
• The official U.S. time for the Eastern Time Zone
• Official times across Canada