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

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

    In traditional American usage, dates are written in the month–day–year order (e.g. May 19, 2024) with a comma before and after the year if it is not at the end of a sentence [2] and time in 12-hour notation (6:23 am). International date and time formats typically follow the ISO 8601 format (2024-05-19) for all-numeric dates, [3] write the ...

  3. ISO 8601 - Wikipedia

    en.wikipedia.org/wiki/ISO_8601

    The separator used between date values (year, month, week, and day) is the hyphen, while the colon is used as the separator between time values (hours, minutes, and seconds). For example, the 6th day of the 1st month of the year 2009 may be written as "2009-01-06" in the extended format or simply as "20090106" in the basic format without ambiguity.

  4. Doomsday Clock - Wikipedia

    en.wikipedia.org/wiki/Doomsday_Clock

    Doomsday Clock. The Doomsday Clock is a symbol that represents the likelihood of a human-made global catastrophe, in the opinion of the members of the Bulletin of the Atomic Scientists. [1] Maintained since 1947, the clock is a metaphor, not a prediction, for threats to humanity from unchecked scientific and technological advances.

  5. List of date formats by country - Wikipedia

    en.wikipedia.org/wiki/List_of_date_formats_by...

    All examples use example date 2021-03-31 / 2021 March 31 / 31 March 2021 / March 31, 2021 – except where a single-digit day is illustrated. Basic components of a calendar date for the most common calendar systems: D – day; M – month; Y – year; Specific formats for the basic components: yy – two-digit year, e.g. 24; yyyy – four-digit ...

  6. 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, 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.

  7. Timeline of the COVID-19 pandemic in the United States (2020)

    en.wikipedia.org/wiki/Timeline_of_the_COVID-19...

    By late November 2019, coronavirus disease 2019 had broken out in Wuhan, China. As reported in Clinical Infectious Diseases on November 30, 2020, 7,389 blood samples collected between December 13, 2019, and January 17, 2020, by the American Red Cross from normal donors in nine states (California, Connecticut, Iowa, Massachusetts, Michigan, Oregon, Rhode Island, Washington and Wisconsin ...

  8. Federal holidays in the United States - Wikipedia

    en.wikipedia.org/wiki/Federal_holidays_in_the...

    Independence Day. Labor Day. Columbus Day. Veterans Day. Thanksgiving Day. Christmas Day. National holidays in the United States are 11 calendar dates designated by the U.S. federal government as official holidays. On these days non-essential national offices are closed although the employees receive pay. [1]

  9. Date and time notation in Europe - Wikipedia

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

    In written German, time is expressed almost exclusively in the 24-hour notation (00:00–23:59), using either a colon or a dot on the line as the separators between hours, minutes, and seconds – e.g. 14:51 or 14.51. The standard separator in Germany (as laid down in DIN 1355, DIN 5008) was the dot. In 1995 this was changed to the colon in the ...