Metronome, a public art installation showing the time in New York City

The Eastern Time Zone (ET) of the Western Hemisphere falls mostly along the east coast of North America and the west coast of South America. Metronome is a large public art installation located along the south end of Union Square in New York City. The Western Hemisphere, also Western hemisphere or western hemisphere, is a geographical term for the half of the Earth that lies West South America is a Continent of the Americas, situated entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a Its time offset is UTC-5 during standard time and UTC-4 during daylight saving time. A time offset is defined by international convention as a number of hours and minutes from Coordinated Universal Time in Greenwich England. UTC−5 is the Time offset used in the North American Eastern Time Zone during Standard time and in the North American Central Time Zone during Standard time is the result of synchronizing clocks in different geographical locations within a Time zone to the same time rather than using the local meridian as 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 The clock time in this zone is based on the mean solar time of the 75th degree meridian west of the Greenwich Observatory. Solar times are measures of the apparent position of the Sun on the Celestial sphere. This article is about the geographical concept For other uses of the word see Meridian. The Royal Observatory Greenwich (formerly the Royal Greenwich Observatory or RGO) was commissioned in 1675 by King Charles II, with the

In the United States and Canada, this time zone is generally called Eastern Time (ET). The United States of America —commonly referred to as the Country to "Dominion of Canada" or "Canadian Federation" or anything else please read the Talk Page Specifically, it is Eastern Standard Time (EST) when observing standard time (Winter), and Eastern Daylight Time (EDT) when observing daylight saving time (Summer). Standard time is the result of synchronizing clocks in different geographical locations within a Time zone to the same time rather than using the local meridian as Winter is one of the four Seasons of Temperate zones Calculated astronomically, it begins on the Solstice and ends on the Equinox Daylight saving time ( DST Summer is one of the four Temperate Seasons Summer marks the warmest time of year with the longest days The 1966 Uniform Time Act in the USA meant that EDT was instituted on the last Sunday in April, starting in 1966, throughout most of the USA. The Uniform Time Act ( April 13 1966,,) is a 1966 United States federal law whose effect was to simplify the official pattern of where and when ^[1] EST would be re-instituted on the last Sunday in October. The act was amended to make the first Sunday in April the beginning of EDT as of 1987. ^[1] The Energy Policy Act of 2005 extended daylight saving time in the U. S. beginning 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^[1]. In Canada, the time changes as it does in the U. S. ^[2]

Usage

North America

Canada

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 Islands)
• East-central Nunavut (including part of Melville Peninsula and most of Ellesmere and Baffin Islands, including Iqaluit; Southampton Island does not observe DST)

United States

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

The exact specification for the location of time zones and the dividing line between zones is set forth in the Code of Federal Regulations at 49 CFR 71. Country to "Dominion of Canada" or "Canadian Federation" or anything else please read the Talk Page The provinces and territories of Canada combine to make up the world's second largest country in total area. Ontario (ɒnˈtɛrioʊ is a province located in the central part of Canada, the largest by population and second largest after Quebec Thunder Bay ( 2006 census population 109140 formerly the twin cities of Fort William and Port Arthur, is a City in and the seat of Thunder Quebec (kwɨˈbɛk Côte-Nord ( French for "Northern Shore" area 24762706  km², or 95609 Nunavut (ˈnuːnəvʊt ( Inuktitut syllabics: ᓄᓇᕗᑦ is the largest and newest territory of Canada; it was separated officially from the Melville Peninsula is a large peninsula in the Canadian Arctic. Ellesmere Island is part of the Qikiqtaaluk Region of the Canadian territory of Nunavut. Baffin Island (ᕿᑭᖅᑖᓗᒃ Qikiqtaaluk, Île de Baffin Old Norse: Helluland) in the territory of Nunavut is the largest member Iqaluit (iqaluit ᐃᖃᓗᐃᑦ in Inuktitut syllabics; often pronounced ɨˈkæljuːɨt in English is the territorial One of the larger members of the Canadian Arctic Archipelago, Southampton Island is a large island at the entrance to Hudson Bay, Canada. Daylight saving time ( DST The United States of America —commonly referred to as the Connecticut ( is a state located in the New England region of the northeastern United States of America. Delaware ( is a state located on the Atlantic Coast in the Mid-Atlantic region of the United States. Washington DC ( formally the District of Columbia and commonly referred to as Washington, the District, or simply D The State of Georgia ( is a state in the United States and was one of the original Thirteen Colonies that revolted against British rule The State of Maine ( is a state in the New England region of the northeastern United States of America, bordering the Atlantic Ocean The Commonwealth of Massachusetts ( is a state located in the New England region of the northeastern United States. New Hampshire ( is a state in the New England region of the northeastern United States of America. New Jersey ( is a state in the Mid-Atlantic and Northeastern regions of the United States. New York ( is a state in the Mid-Atlantic and Northeastern regions of the United States and is the nation's third most populous North Carolina ( is a state located on the Atlantic Seaboard in the southeastern United States Ohio ( is a Midwestern state of the United States. As part of the Great Lakes region, Ohio has long been a cultural and geographical crossroads The Commonwealth of Pennsylvania ( often colloquially referred to as PA (its abbreviation by natives and Northeasterners is a state located in the Northeastern Rhode Island ( officially named the State of Rhode Island and Providence Plantations, is a state in the New England region of the United States South Carolina ( is a state in the southern region ( Deep South) of the United States of America. Vermont ( is a state in the New England region of the northeastern United States of America. The Commonwealth of Virginia ( is an American state West Virginia ( is a state in the Appalachian Upland South, and Mid-Atlantic regions of the United States, bordered by The Code of Federal Regulations (CFR is the codification of the general and permanent rules and regulations (sometimes called administrative law) published in the ^[3]

North American Eastern Time Zone (shown in the furthest right yellow)

Parts of several other states use Eastern Time as well:

• nearly all of Florida except for the part of the panhandle west of the Apalachicola River. Florida ( is a state located in the southeastern region of the United States, bordering Alabama to the northwest and Georgia to the Approaching the Gulf of Mexico, the line jumps west to the Bay/Gulf county line. The Gulf of Mexico ( Spanish: Golfo de México) is the ninth largest Body of water in the world
• 80 of Indiana's 92 Counties (six in the Evansville metropolitan area and six in the Chicago metropolitan area observe Central Time)
• 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. The State of Indiana ( was the 19th US state admitted into the union Evansville (ˈɛvənzˌvɪl is the third-largest city in the U Chicago (ʃɪˈkɑːgoʊ is the largest City by population in the state of Illinois and the American Midwest of the United States. The Central Time Zone observes Standard time by subtracting six hours from UTC during standard time ( UTC−6) and five hours during Daylight saving The Commonwealth of Kentucky ( is a state located in the East Central United States of America. Michigan ( is a Midwestern state of the United States of America. The Upper Peninsula of Michigan is the northern of the two major land masses that comprise the U Wisconsin ( or wɪˈskɑnsɨn (French Ouisconsin) is one of the fifty United States of America, located in the north central part of the United States Gogebic County is the westernmost county in the US state of Michigan. Iron County is a county in the Upper Peninsula of the US state of Michigan. Dickinson County is a county in the US state of Michigan. As of the 2000 census, the population was 27472 Menominee County is a county in the US state of Michigan. As of the 2000 census, the population was 25326 Tennessee ( is a state located in the Southern United States. East Tennessee is a name given to approximately the eastern third of the state of Tennessee, one of Alabama (formally the State of Alabama;) is a State located in the southern region of the United States of America. Phenix City is a city in Lee County and Russell County in the U Smiths Station is a city in Lee County, Alabama, United States. Lanett is a city in Chambers County, Alabama, United States. At the 2000 census the population was 7897 Valley is a city in Chambers County, Alabama, United States. At the 2000 census the population was 9198 The Central Time Zone observes Standard time by subtracting six hours from UTC during standard time ( UTC−6) and five hours during Daylight saving This is primarily because they are part of the Columbus, Georgia media market. Columbus is a City in Muscogee County, Georgia, United States. The State of Georgia ( is a state in the United States and was one of the original Thirteen Colonies that revolted against British rule ^[4]
• Eastern Time is also used somewhat as a de-facto official time for all of the United States. National media organizations will often report when events happened or are scheduled to happen in Eastern Time even if they occurred in another time zone, and TV schedules are also almost always posted in Eastern Time. Major professional sports leagues also post all game times in Eastern time, even if both teams are from the same time zone, outside of Eastern Time. For example a game time between two teams from Pacific Time Zone will still be posted in Eastern time.

Mexico

• Quintana Roo: this eastern state, formerly followed EST for a brief period in the 1990s

Central America

The countries that use Eastern Time Zone include:

• Panama

West Indies

The countries that use Eastern Time Zone include:

• Jamaica
• Haiti
• Cuba
• the Bahamas
• Not all Caribbean countries observe daylight saving time. Quintana Roo (kinˈtana ˈro is a state of Mexico, on the eastern part of the Yucatán Peninsula. Panama, officially the Republic of Panama (República de Panamá) is the southernmost country of Central America. Jamaica (ˈdʒəˈmeɪkə} is an Island nation of the Greater Antilles, in length and as much as in width situated in the Caribbean Sea. Haiti ( English: ˈheɪ·tiː or haɪ·ˈjiː·tiː French Haïti a·i·ti Haitian Creole: The Republic of Cuba (ˈkjuːbə or) consists of the island of Cuba (the largest and second-most populous island of the Greater Antilles) Isla de la The Bahamas, officially the Commonwealth of The Bahamas, is an independent sovereign English -speaking country consisting of two thousand Cays and Daylight saving time ( DST 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. 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 The Atlantic Standard Time Zone (AST is a geographical region that keeps time by subtracting four hours from either Coordinated Universal Time ( UTC) or Greenwich Mean Time (

South America

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. South America is a Continent of the Americas, situated entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a Colombia (kəˈlʌmbɪə officially the Republic of Colombia () is a country in northwestern South America. For a topic outline on this subject see List of basic Ecuador topics. Peru (Perú Piruw Piruw officially the Republic of Peru ( reˈpuβlika del peˈɾu is a country in western South America. |utc_offset = -2 to -4 |time_zone_DST = BRST |utc_offset_DST = -2 to -5 |cctld For other meanings of the word Acre, see also Acre (disambiguation Acre (ˈakɾi is a state of Brazil, located Amazonas (amaˈzonas is a state of Brazil, located in the northern part of the country

Major metropolitan areas

See also

• Time zone
• Time in Indiana
• Atlantic Standard Time Zone
• Newfoundland Standard Time Zone
• Time in the United States
• Time in Canada
• Time in Brazil
• Time in Mexico

Sources

• Official U.S. time for the Eastern 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
• Official times across Canada
• Federal Regulations defining time zones

References