Not to mention Excel inherited bugs from Lotus 1-2-3 for the sake of compatibility, and therefore incorrectly treats the year 1900 as a leap year: https://docs.

Not to mention Excel inherited bugs from Lotus 1-2-3 for the sake of compatibility, and therefore incorrectly treats the year 1900 as a leap year: https://docs.microsoft.com/en-us/office/troubleshoot/excel/wrongly-assumes-1900-is-leap-year https://docs.microsoft.com/en-us/office/troubleshoot/excel/w...