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  2. 1412 - Wikipedia

    en.wikipedia.org/wiki/1412

    Printable version; In other projects ... English Regnal year: 13 ... Year 1412 was a leap year starting on Friday on the Julian calendar. Events January–March ...

  3. Proleptic Julian calendar - Wikipedia

    en.wikipedia.org/wiki/Proleptic_Julian_calendar

    Thus, the year 1 BC of the proleptic Julian calendar is a leap year. This is to be distinguished from the astronomical year numbering , introduced in 1740 by French astronomer Jacques Cassini , which considers each New Year an integer on a time axis , with year 0 corresponding to 1 BC, and "year −1" corresponding to 2 BC, so that in this ...

  4. Leap year - Wikipedia

    en.wikipedia.org/wiki/Leap_year

    In the Gregorian calendar, the standard calendar in most of the world, [6] almost every fourth year is a leap year. Each leap year, the month of February has 29 days instead of 28. Adding one extra day in the calendar every four years compensates for the fact that a period of 365 days is shorter than a tropical year by almost six hours. [7]

  5. What is a Leap Year and when will it happen? - AOL

    www.aol.com/leap-happen-153358037.html

    They usually take place every four years. For premium support please call: 800-290-4726 more ways to reach us

  6. Conversion between Julian and Gregorian calendars - Wikipedia

    en.wikipedia.org/wiki/Conversion_between_Julian...

    Years are given in astronomical year numbering. Augustus corrected errors in the observance of leap years by omitting leap days until AD 8. Julian calendar dates before March AD 4 are proleptic, and do not necessarily match the dates actually observed in the Roman Empire. [1]

  7. Leap year superstitions and traditions from around the world

    www.aol.com/news/best-leap-superstitions...

    For a year to be a leap year, it has to be divisible by four or 400. “The Earth takes approximately 365.2422 days to complete one orbit around the sun, which is slightly longer than 365 days.

  8. Why do we have Leap Year? A guide to the calendar's ... - AOL

    www.aol.com/why-leap-guide-calendars-bonus...

    On a non-Leap Year, some leapers choose to celebrate the big day on Feb. 28. Some choose to celebrate on March 1. Some even choose both days or claim the whole month of February to celebrate.

  9. List of years - Wikipedia

    en.wikipedia.org/wiki/List_of_years

    Help; Learn to edit; Community portal; Recent changes; Upload file; Special pages

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