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  2. Eastern Time Zone - Wikipedia

    en.wikipedia.org/wiki/Eastern_Time_Zone

    Current time. 08:33, 17 September 2024 EST [refresh] 09:33, 17 September 2024 EDT [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 23 states in the eastern part of the United States, parts of eastern Canada, and the state of Quintana Roo in Mexico.

  3. History of time in the United States - Wikipedia

    en.wikipedia.org/wiki/History_of_time_in_the...

    The current situation is different only in that six Indiana counties have since been moved from the Central time zone to the Eastern time zone. 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 ...

  4. Daylight saving time in the United States - Wikipedia

    en.wikipedia.org/wiki/Daylight_saving_time_in...

    The Uniform Time Act of 1966 established a uniform set of rules for states opting to observe daylight saving time. [1] In the U.S., daylight saving time starts on the second Sunday in March and ends on the first Sunday in November, with the time changes taking place at 2:00 a.m. local time. With a mnemonic word play referring to seasons, clocks ...

  5. Time in the United States - Wikipedia

    en.wikipedia.org/wiki/Time_in_the_United_States

    Time in the United States. In the United States, time is divided into nine standard time zones covering the states, territories and other US possessions, with most of the country observing daylight saving time (DST) for approximately the spring, summer, and fall months. The time zone boundaries and DST observance are regulated by the Department ...

  6. Time zone - Wikipedia

    en.wikipedia.org/wiki/Time_zone

    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.

  7. Permanent time observation in the United States - Wikipedia

    en.wikipedia.org/wiki/Permanent_time_observation...

    Previous observation of year-round daylight saving time. Permanent DST in the US was briefly enacted by president Richard Nixon in January 1974, in response to the 1973 oil crisis. [19] The new permanent DST law was retracted within the year. [1][2][42][43] Year-round daylight saving time was initially supported by 79% of the public, but that ...

  8. Daylight saving time - Wikipedia

    en.wikipedia.org/wiki/Daylight_saving_time

    Daylight saving time (DST), also referred to as daylight saving (s), daylight savings time, daylight time (United States and Canada), or summer time (United Kingdom, European Union, and others), is the practice of advancing clocks to make better use of the longer daylight available during summer so that darkness falls at a later clock time. [1 ...

  9. Atlantic Time Zone - Wikipedia

    en.wikipedia.org/wiki/Atlantic_Time_Zone

    The Atlantic Time Zone is a geographical region that keeps standard time—called Atlantic Standard Time (AST)—by subtracting four hours from Coordinated Universal Time (UTC), resulting in UTC−04:00. AST is observed in parts of North America and some Caribbean islands. During part of the year, some portions of the zone observe daylight ...