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  2. Leap year - Wikipedia

    en.wikipedia.org/wiki/Leap_year

    Every year that is exactly divisible by four is a leap year, except for years that are exactly divisible by 100, but these centurial years are leap years if they are exactly divisible by 400. For example, the years 1700, 1800, and 1900 are not leap years, but the years 1600 and 2000 are. [8] 1800 calendar, showing that February had only 28 days

  3. Category:Leap years in the Gregorian calendar - Wikipedia

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

    Pages in category "Leap years in the Gregorian calendar" The following 110 pages are in this category, out of 110 total. This list may not reflect recent changes .

  4. 1900 - Wikipedia

    en.wikipedia.org/wiki/1900

    1900 was an exceptional common year starting on Monday of the Gregorian calendar and a leap year starting on Saturday of the Julian calendar, the 1900th year of the Common Era (CE) and Anno Domini (AD) designations, the 900th year of the 2nd millennium, the 100th and last year of the 19th century, and the 1st year of the 1900s decade. As of the ...

  5. Here's a list of how birthdays and ages shake out with leap years: 1916: You'd be 108 years old or 27. 1920: You'd be 104 years old or 26. 1924: You'd be 100 years old or 25.

  6. 2024 is a leap year, but why? Here’s the science behind the ...

    www.aol.com/news/2024-leap-why-science-behind...

    Years divisible by 100 (century years such as 1900 or 2000) cannot be leap years unless they are also divisible by 400. (For this reason, the years 1700, 1800, and 1900 were not leap years, but ...

  7. Leap Day birthday math: How old would you be if you were born ...

    www.aol.com/leap-day-birthday-math-old-024548677...

    This year, Leap Day is Thursday, Feb. 29, 2024. If you were born on Leap Day 1924, you would be 100 years old or 25 in Leap Day years. ... For example, 2000 and 2400 are leap years, but 1800, 1900 ...

  8. Century leap year - Wikipedia

    en.wikipedia.org/wiki/Century_leap_year

    This eliminates 3 of the 4 end-of-century years in a 400-year period. For example, the years 1600, 2000, 2400, and 2800 are century leap years since those numbers are evenly divisible by 400, while 1700, 1800, 1900, 2100, 2200, 2300, 2500, 2600, 2700, 2900, and 3000 are common years despite being evenly divisible by 4. This scheme brings the ...

  9. List of non-standard dates - Wikipedia

    en.wikipedia.org/wiki/List_of_non-standard_dates

    Microsoft Excel displays the day before January 1, 1900 (the earliest date it can represent) as January 0, 1900. [17] It also treats 1900 incorrectly as a leap year (whereas only centuries divisible by 400 are), so it displays the day before March 1, 1900 as the non-existent February 29 instead of February 28. This means March 1, 1900 is the ...