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  2. Time in the United States - Wikipedia

    en.wikipedia.org/wiki/Time_in_the_United_States

    Before the adoption of four standard time zones for the continental United States, many towns and cities set their clocks to noon when the sun passed their local meridian, pre-corrected for the equation of time on the date of observation, to form local mean solar time. Noon occurred at different times but time differences between distant ...

  3. List of tz database time zones - Wikipedia

    en.wikipedia.org/wiki/List_of_tz_database_time_zones

    The tz database partitions the world into regions where local clocks all show the same time. This map was made by combining version 2023d with OpenStreetMap data, using open source software. [1] This is a list of time zones from release 2024b of the tz database. [2]

  4. Date and time notation in the United States - Wikipedia

    en.wikipedia.org/wiki/Date_and_time_notation_in...

    The 24-hour clock is used in military, public safety, and scientific contexts in the United States. [4] It is best known for its use by the military and is therefore commonly called "military time". In U.S. military use, 24-hour time is traditionally written without a colon (1800 instead of 18:00).

  5. List of time offsets by U.S. state and territory - Wikipedia

    en.wikipedia.org/wiki/List_of_time_offsets_by_U...

    Map of U.S. time zones with new CST and EST areas displayed. Some U.S. time zones, such as the Samoa Time Zone, are not on this map. This is a list of the time offsets by U.S. states, federal district, and territories. For more about the time zones of the U.S. see time in the United States. Most states are entirely contained within one time zone.

  6. Category:Time in the United States - Wikipedia

    en.wikipedia.org/wiki/Category:Time_in_the...

    Download QR code; Print/export ... This includes articles on time in the United States, including its insular areas. ... List of clocks in the United States; N.

  7. Daylight saving time in the United States - Wikipedia

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

    The Ohio Clock in the U.S. Capitol being turned forward for the country's first daylight saving time on March 31, 1918 by the Senate sergeant at arms Charles Higgins.. Most of the United States observes daylight saving time (DST), the practice of setting the clock forward by one hour when there is longer daylight during the day, so that evenings have more daylight and mornings have less.

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