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  2. Leap year problem - Wikipedia

    en.wikipedia.org/wiki/Leap_year_problem

    The leap year problem (also known as the leap year bug or the leap day bug) is a problem for both digital (computer-related) and non-digital documentation and data storage situations which results from errors in the calculation of which years are leap years, or from manipulating dates without regard to the difference between leap years and common years.

  3. Time formatting and storage bugs - Wikipedia

    en.wikipedia.org/wiki/Time_formatting_and...

    One workaround is to use the year 1996, 2024 or 2052 in lieu of 2080 (as compatible leap years) to display the correct day of the week, date and month on the main screen. [ citation needed ] Systems storing the year as a two-digit value 00..99 internally only, like many RTCs, may roll over from 31 December 2079, to the IBM PC and DOS epoch of ...

  4. Determination of the day of the week - Wikipedia

    en.wikipedia.org/wiki/Determination_of_the_day...

    Day-item: The total, thus reached, must be corrected, by deducting "1" (first adding 7, if the total be "0"), if the date be January or February in a leap year, remembering that every year, divisible by 4, is a Leap Year, excepting only the century-years, in 'New Style', when the number of centuries is not so divisible (e.g. 1800).

  5. Why do we have a leap year? What would happen if we didn’t ...

    www.aol.com/why-leap-happen-didn-t-130000847.html

    Whether you’ve realized it or not, 2024 is a leap year. ... in an even number, 354, the king rounded his year up to 355. ... 24 hours — or one day. “You add a day every four years and that ...

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

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

    A year may be a leap year if it is evenly divisible by 4. 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 ...

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

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

    If the year can be evenly divided by 100, it is not a leap year unless the year is also evenly divisible by 400, according to mathisfun.com. For example, 2000 and 2400 are leap years, but 1800 ...

  8. ISO week date - Wikipedia

    en.wikipedia.org/wiki/ISO_week_date

    Find the week number of Saturday 5th November 2016 (leap year): Find the ordinal day number first: moy = 11 dom = 5 leap = 1 add = 305, from table lookup doy = 305 + 5 = 310. Alternatively, use spreadsheet serial day numbers instead: off = 42369, i.e. 31st December 2015 day = 42679 doy = 42679 − 42369 = 310. Finally, find the week number:

  9. Common year - Wikipedia

    en.wikipedia.org/wiki/Common_year

    A common year is a calendar year with 365 days, as distinguished from a leap year, which has 366 days. [1] More generally, a common year is one without intercalation.The Gregorian calendar (like the earlier Julian calendar) employs both common years and leap years to keep the calendar aligned with the tropical year, which does not contain an exact number of days.