Eastern Time Zone

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Eastern Time Zone
Timezoneswest.PNG
  Eastern Time Zone
UTC offset
ESTUTC−05:00
EDTUTC−04:00
Current time
20:34, 11 December 2019 EST [refresh]
Observance of DST
DST is observed in parts of this time zone.

The Eastern Time Zone (ET) is a time zone encompassing part or all of 22 states in the eastern part of the contiguous United States, parts of eastern Canada, the state of Quintana Roo in Mexico, Panama in Central America, and certain Caribbean and Atlantic islands, along with certain countries and parts of countries in South America. Places that use Eastern Standard Time (EST) when observing standard time (autumn/winter) are five hours behind Coordinated Universal Time (UTC−05:00).

Eastern Daylight Time (EDT), when observing daylight saving time (spring/summer), is four hours behind Coordinated Universal Time (UTC−04:00).

In the northern parts of the time zone, on the second Sunday in March, at 2:00 a.m. EST, clocks are advanced to 3:00 a.m. EDT leaving a one-hour "gap". On the first Sunday in November, at 2:00 a.m. EDT, clocks are moved back to 1:00 a.m. EST, thus "duplicating" one hour. Southern parts of the zone (Panama and the Caribbean) do not observe daylight saving time.

The largest city in the Eastern Time Zone is New York; the New York metropolitan area is the largest metropolitan area in the zone.

History[edit]

The boundaries of the Eastern Time Zone have moved westward since the Interstate Commerce Commission (ICC) took over time-zone management from railroads in 1938. For example, the easternmost and northernmost counties in Kentucky were added to the zone in the 1940s, and in 1961 most of the state went Eastern. In 2000, Wayne County, on the Tennessee border, switched from Central to Eastern.[1] In March 2018, the Florida Legislature passed a bill requesting authorization from Congress for year-round daylight saving time, which would effectively put Florida on Atlantic Standard Time year-round (except for west of the Apalachicola River, which would be on Eastern Standard Time year-round).[2]

Daylight saving time[edit]

Daylight saving time for the Eastern Time Zone was introduced by the Uniform Time Act of 1966, which specified that daylight saving time would run from the last Sunday of April until the last Sunday in October in the United States.[3] The act was amended to make the first Sunday in April the beginning of daylight saving time beginning in 1987.[3]

Later, the Energy Policy Act of 2005 extended daylight saving time in the United States, beginning in 2007. Since then, local times change at 2:00 a.m. EST to 3:00 a.m. EDT on the second Sunday in March, and return from 2:00 a.m. EDT to 1:00 a.m. EST on the first Sunday in November.[3] In Canada, daylight saving time begins and ends on the same days and at the same times as it does in the United States.[4][5]

Canada[edit]

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

All observe daylight saving time in sync with the United States, with very localized exceptions.

United States[edit]

The boundary between time zones is set forth in the Code of Federal Regulations, with the boundary between the Eastern and Central Time Zones being specifically detailed at 49 CFR 71.[6]

Seventeen states and Washington, D.C. are located entirely within the Eastern Time Zone. They are:[citation needed]

Five states are partly in the Eastern Time Zone, with the remaining portions in the Central Time Zone. They are:

Mexico[edit]

  • Quintana Roo: This is the only Mexican state to observe EST. It moved from Central Time to Eastern Time after a successful lobbying effort by tourism interests.[8] Quintana Roo does not observe daylight saving time.

Caribbean Islands[edit]

The Bahamas and Haiti officially observe both Eastern Standard Time during the winter months and Eastern Daylight Time during the summer months. Cuba generally follows the U.S. with Eastern Standard Time in the winter, and Eastern Daylight Time in the summer, but the exact day of change varies year to year. Cayman Islands and Jamaica use Eastern Standard Time year-round.

Turks and Caicos Islands[edit]

The Turks and Caicos Islands followed Eastern Time with daylight saving until 2015, when the territory switched to the Atlantic Time Zone. The Turks and Caicos Islands switched back to the pre-2015 schedule in March 2018.[9] A 2017 consultation paper highlighted the advantage for business and tourism of being in the same time zone as the eastern United States as an important factor in the decision.[10]

Central and South America[edit]

In Central America, the countries from Guatemala to Costa Rica use Central Standard Time UTC−06:00 year-round, but Panama uses Eastern Standard Time (UTC−05:00) year-round.

In South America, the state of Acre and the southwest part of the state of Amazonas (both in Brazil), along with Colombia, Ecuador (except for the Galápagos Islands, which use Central Standard Time), and Peru also use Eastern Standard Time year-round.

See also[edit]

References[edit]

  1. ^ "Why Louisville?". Louisville magazine. Archived from the original on 20 July 2018. Retrieved 10 February 2018.
  2. ^ Klas, Mary Ellen (6 March 2018). "Legislature approves year-round daylight saving time — but it's not a done deal yet". Miami Herald. Retrieved 30 March 2018.
  3. ^ a b c Prerau, David (2006). "Early adoption and U.S. Law". Daylight Saving Time. Web Exhibit. Retrieved 23 April 2007.
  4. ^ Law, Gwillim (21 September 2007). "United States Time Zones".
  5. ^ "Daylight Saving Time Starts Sunday". Government of Ontario. 7 March 2008. Retrieved 21 September 2010.
  6. ^ The specification for the Eastern Time Zone is set forth at 49 CFR 71.4, and is listed in Text and pdf formats. The boundary between Eastern and Central is set forth at 49 CFR 71.5, and is listed in text and pdf formats.
  7. ^ http://legacy.decaturdaily.com/decaturdaily/news/060813/zones.shtml
  8. ^ "On Mexican Time: Changing Time Zones To Accommodate Tourism". Forbes. Retrieved 29 January 2015.
  9. ^ "DST Dates Confirmed". Timeanddate.com. 25 July 2017. Retrieved 10 January 2019.
  10. ^ "Consultation paper Daylight Saving" (PDF). April 2017. p. 6-7. Retrieved 10 January 2019.

External links[edit]