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  2. Gregorian calendar - Wikipedia

    en.wikipedia.org/wiki/Gregorian_calendar

    [e] [f] Of these 400 years, 303 are regular years of 365 days and 97 are leap years of 366 days. A mean calendar year is ⁠365 + 97 / 400 ⁠ days = 365.2425 days, or 365 days, 5 hours, 49 minutes and 12 seconds.

  3. List of dates predicted for apocalyptic events - Wikipedia

    en.wikipedia.org/wiki/List_of_dates_predicted...

    This is an accepted version of this page This is the latest accepted revision, reviewed on 8 January 2025. This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources. The Last Judgment by painter Hans Memling. In Christian belief, the Last Judgement is an apocalyptic event where God makes a final ...

  4. List of presidents of the United States by time in office

    en.wikipedia.org/wiki/List_of_presidents_of_the...

    The length of a full four-year presidential term of office usually amounts to 1,461 days (three common years of 365 days plus one leap year of 366 days). If the last day is included, all numbers would be one day more, except Grover Cleveland would have two more days, as he served two non-consecutive terms. [a]

  5. Lilian date - Wikipedia

    en.wikipedia.org/wiki/Lilian_date

    A Lilian date is the number of days since the beginning of the Gregorian calendar on October 15, 1582, regarded as Lilian date 1. It was invented by Bruce G. Ohms of IBM in 1986 and is named for Aloysius Lilius, who devised the Gregorian Calendar. [1]

  6. How many days until Christmas Day 2024? See live countdown - AOL

    www.aol.com/many-days-until-christmas-day...

    Watch live countdown to see how many shopping days remain. Christmas is celebrated annually on Dec. 25. Watch live countdown to see how many shopping days remain. ... Brandi D. Addison, USA TODAY ...

  7. After the death of Jimmy Carter, how many former US ... - AOL

    www.aol.com/news/death-jimmy-carter-many-former...

    Now, only one president who served during the 20th century is alive. ... Clinton, 78, was in office from 1993 to 2001. Since then, the 42nd president has been involved in multiple charitable ...

  8. Unix time - Wikipedia

    en.wikipedia.org/wiki/Unix_time

    The quotient is the number of days since the epoch, and the modulus is the number of seconds since midnight UTC on that day. If given a Unix time number that is ambiguous due to a positive leap second, this algorithm interprets it as the time just after midnight. It never generates a time that is during a leap second.

  9. Thirty Days Hath September - Wikipedia

    en.wikipedia.org/wiki/Thirty_days_hath_September

    Thirty Days Hath September", or "Thirty Days Has September", [1] is a traditional verse mnemonic used to remember the number of days in the months of the Julian and Gregorian calendars. It arose as an oral tradition and exists in many variants. It is currently earliest attested in English, but was and remains common throughout Europe as well.