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The Eastern Time Zone (ET) is a time zone encompassing part or all of 23 states in the eastern part of the United States, parts of eastern Canada, and the state of Quintana Roo in Mexico. Eastern Standard Time ( EST ) is five hours behind Coordinated Universal Time ( UTC−05:00 ).
UTC−05:00 ET: Yes: Eastern Standard Time Delaware: UTC−05:00 ET: Yes: Eastern District of Columbia: UTC−05:00 ET: Yes: Eastern Florida: UTC−05:00 ET Yes Big Bend and peninsula regions east of the Apalachicola River along with the portion of Gulf County south of the Intracoastal Waterway: UTC−05:00 EST Eastern Standard Time UTC−06:00 CT
Eastern Standard Time (North America) ... ET (EST/EDT) Eastern Time (North America) UTC−05:00 / UTC−04:00: FET: Further-eastern European Time: UTC+03:00: FJT ...
Some Indiana counties near Cincinnati and Louisville were on Eastern Time but did (unofficially) observe DST. The Energy Policy Act of 2005 extended daylight saving time for an additional month beginning in 2007. The Sunshine Protection Act of 2021 passed the United States Senate in March 2022. The bill would make daylight saving time the time ...
Counties to the north and east of this boundary are in the Eastern Time Zone, while counties to the south and west are in the Central Time Zone. 30% of the area in Eastern Time Zone is further west than areas to the south. This progression to the west is further continued into Indiana.
UTC−04:00 is an identifier for a time offset from UTC of −04:00.. It is observed in the Eastern Time Zone (e.g., in Canada and the United States) during the warm months of daylight saving time, as Eastern Daylight Time.
TT differs from Geocentric Coordinate Time (TCG) by a constant rate. Formally it is defined by the equation = +, where TT and TCG are linear counts of SI seconds in Terrestrial Time and Geocentric Coordinate Time respectively, is the constant difference in the rates of the two time scales, and is a constant to resolve the epochs (see below).
The Intercolonial Railway serving the Canadian maritime provinces of New Brunswick and Nova Scotia just east of Maine decided not to adopt Intercolonial Time based on the 60th meridian west of Greenwich, instead adopting Eastern Time, so only four time zones were actually adopted by American and Canadian railroads in 1883. [9]