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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. Zeller's congruence - Wikipedia

    en.wikipedia.org/wiki/Zeller's_congruence

    K the year of the century (). J is the zero-based century (actually ⌊ y e a r / 100 ⌋ {\displaystyle \lfloor year/100\rfloor } ) For example, the zero-based centuries for 1995 and 2000 are 19 and 20 respectively (not to be confused with the common ordinal century enumeration which indicates 20th for both cases).

  4. Determination of the day of the week - Wikipedia

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

    Bold figures (e.g., 04) denote leap year. If a year ends in 00 and its hundreds are in bold it is a leap year. Thus 19 indicates that 1900 is not a Gregorian leap year, (but 19 in the Julian column indicates that it is a Julian leap year, as are all Julian x00 years). 20 indicates that 2000 is a leap year. Use Jan and Feb only in leap years.

  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. ... 354, the king rounded his year up to 355. Free food and 40 cents off gas in Sacramento: Here are 7 Leap Day deals this week.

  6. Leap year - Wikipedia

    en.wikipedia.org/wiki/Leap_year

    A leap year (also known as an intercalary year or bissextile year) is a calendar year that contains an additional day (or, in the case of a lunisolar calendar, a month) compared to a common year. The 366th day (or 13th month) is added to keep the calendar year synchronised with the astronomical year or seasonal year . [ 1 ]

  7. Here’s When and Why We Get a Bonus Day in February 2024 - AOL

    www.aol.com/lifestyle/why-extra-day-february...

    February, the last month in their calendar, was designated with 28 days, while an extra day was added every four years during a leap year. This adjustment aimed to align the calendar with the ...

  8. Day count convention - Wikipedia

    en.wikipedia.org/wiki/Day_count_convention

    This convention accounts for days in the period based on the portion in a leap year and the portion in a non-leap year. The days in the numerators are calculated on a Julian day difference basis. In this convention the first day of the period is included and the last day is excluded. The CouponFactor uses the same formula, replacing Date2 by Date3.

  9. Leap year specials, freebies: Get discounts, free food from ...

    www.aol.com/leap-specials-freebies-discounts...

    Insomnia Cookies is giving anyone with a leap day birthday a free six-pack of cookies. Customers can also expect a bonus cookie with every 12 and 6-pack through Sunday, March 3. Leap day 2024 meaning