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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. Places that use: Eastern Standard Time (EST), when observing standard time (autumn/winter), are five hours behind Coordinated Universal Time (UTC−05:00).
Yes. 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.
Standard time in the contiguous United States, illustration 1903. From east to west, the four time zones of the contiguous United States are: Eastern Time Zone (Zone R), which comprises roughly the states on the Atlantic coast and the eastern two thirds of the Ohio Valley.
The history of standard time in the United States began November 18, 1883, when United States and Canadian railroads instituted standard time in time zones. Before then, time of day was a local matter, and most cities and towns used some form of local solar time , maintained by some well-known clock (for example, on a church steeple or in a ...
Permanent standard time. Prior to the nationwide implementation of DST in 1967, some American states observed permanent Standard Time. Currently in the US, Arizona (with the exception of the Navajo Nation), Hawaii, and all permanently inhabited territories (American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the Virgin Islands) observe permanent standard time.
Standard time. Standard time is the synchronization of clocks within a geographical region to a single time standard, rather than a local mean time standard. Generally, standard time agrees with the local mean time at some meridian that passes through the region, often near the centre of the region. Historically, standard time was established ...
Time zones of the world. A time zone is an area which observes a uniform standard time for legal, commercial and social purposes. Time zones tend to follow the boundaries between countries and their subdivisions instead of strictly following longitude, because it is convenient for areas in frequent communication to keep the same time.
This is a list of the UTC time offsets, showing the difference in hours and minutes from Coordinated Universal Time (UTC), from the westernmost (−12:00) to the easternmost (+14:00). It includes countries and regions that observe them during standard time or year-round. The main purpose of this page is to list the current standard time offsets ...