Editing 1899 in science (section)

==Computing==
* December 31 – Retrospectively, day zero for dates in [[Microsoft Excel]]. This is to ensure backwards compatibility with [[Lotus 1-2-3]], which had a bug misinterpreting 1900 as a leap year.<ref>{{Cite web |last=Porter |first=Remy |date=2019-02-05 |title=Set the Flux Capacitor for 12/30/1899 |url=https://thedailywtf.com/articles/set-the-flux-capacitor-for-12-30-1899 |access-date=2022-09-25 |website=The Daily WTF}}</ref><ref>{{Cite web |last=helenclu |title=Excel incorrectly assumes that the year 1900 is a leap year - Office |url=https://learn.microsoft.com/en-us/office/troubleshoot/excel/wrongly-assumes-1900-is-leap-year |access-date=2022-09-25 |website=learn.microsoft.com |date=2022-07-22|language=en-us}}</ref><ref>{{Cite web |last=helenclu |title=Differences between the 1900 and the 1904 date system - Office |url=https://learn.microsoft.com/en-us/office/troubleshoot/excel/1900-and-1904-date-system |access-date=2022-09-25 |website=learn.microsoft.com |date=2022-05-05|language=en-us}}</ref>