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[10] [better source needed] RFC 733 published in 1977 allowed using military time zones in the Date: field of emails . [ 11 ] RFC 1233 in 1989 noted that the signs of the offsets were specified as opposite the common convention (e.g. A=UTC−1 instead of A=UTC+1), [ 12 ] and the use of military time zones in emails was deprecated in RFC 2822 in ...
EDT: Eastern Daylight Time (North America) UTC−04:00: EEST: Eastern European Summer Time: UTC+03:00: EET: Eastern European Time: UTC+02:00: EGST: Eastern Greenland Summer Time: UTC+00:00: EGT: Eastern Greenland Time: UTC−01:00: EST: Eastern Standard Time (North America) UTC−05:00: ET (EST/EDT) Eastern Time (North America) UTC−05:00 ...
Standard Time (SDT) and Daylight Saving Time (DST) offsets from UTC in hours and minutes. For zones in which Daylight Saving is not observed, the DST offset shown in this table is a simple duplication of the SDT offset.
Eastern Daylight Time (EDT) is four hours behind Coordinated Universal Time (UTC−04:00). Observed during daylight saving time (spring/summer/early autumn in the United States and Canada). On the second Sunday in March, at 2:00 a.m. EST, clocks are advanced to 3:00 a.m. EDT, creating a 23-hour day.
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 (DST) 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 Time the time ...
Canada (Eastern Time Zone) Nunavut [17] East of 85th meridian west, and Southampton Island and adjoining islands; Ontario. East of 90° West [19] Quebec. Most of province except easternmost area; Colombia [18] Cuba; Ecuador (except Galápagos Islands) [18] Haiti; Jamaica; Mexico. Quintana Roo [13] Panama [18] Peru [18] United Kingdom Cayman ...
Central Standard Time (Phenix City observes Eastern time on a de facto basis) Alaska: UTC−09:00 AKT Yes Most of state: UTC−09:00 AKST Alaska Standard Time: UTC−10:00 HT Aleutian Islands (west of 169°30' W): UTC−10:00 HST Hawaii–Aleutian Standard Time American Samoa: UTC−11:00 ST: No: Samoa Standard Time Arizona: UTC−07:00 MT ...
The evolution of United States standard time zone boundaries from 1919 to 2024 in five-year increments. Plaque in Chicago marking the creation of the four time zones of the continental US in 1883 Colorized 1913 time zone map of the United States, showing boundaries very different from today Map of U.S. time zones during between April 2, 2006, and March 11, 2007.