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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.
day-of-year (1 to 366) show=era: an era code such as BC or BCE show=format: code for the detected format of the input date (dmy, mdy, ymd, or error) show=gsd: Gregorian serial date show=juliandate: Julian day show=isleapyear: 1 if the date is in a leap year; 0 otherwise show=monthabbr: abbreviated name of month show=monthdays
On 5 January 1975, the 12-bit field that had been used for dates in the TOPS-10 operating system for DEC PDP-10 computers overflowed, in a bug known as "DATE75". The field value was calculated by taking the number of years since 1964, multiplying by 12, adding the number of months since January, multiplying by 31, and adding the number of days since the start of the month; putting 2 12 − 1 ...
There are typically 365 days in a year, but in 2024 we get 366. Here's the history behind February's bonus day.
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 ...
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 ...
That resulted in the years 1700, 1800, and 1900 losing their leap day, but 2000 adding one. Every other fourth year in all of these centuries would get it's Feb. 29. And with that the calendrical ...
Download QR code; Print/export Download as PDF ... No leap year (1900): 1 day No leap year (1901): 1 day ... Text is available under the Creative Commons Attribution ...