Jc3s5h added a comment. In https://phabricator.wikimedia.org/T94064#1158423, @mkroetzsch wrote in part:
> Julian day calculation is a very simple algorithm > (https://en.wikipedia.org/wiki/Julian_day#Calculation), and this is all you > need for date comparisons, calendar conversion, and time intervals. For an environment that allows dates from the beginning of the universe to the estimated destruction of the Solar System, Julian date conversion is not so simple; the algorithm in the English Wikipedia article, copied from a reliable source, fails for Julian dates that are slightly less than zero (before approximately 4713 BCE). The widest range algorithms I know of are in Dershowitz and Reingold's ''Calendrical Calculations''; I recall they tested them for 10,000 years before and after the present (but I can't recall which page this claim is on). TASK DETAIL https://phabricator.wikimedia.org/T94064 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Smalyshev, Jc3s5h Cc: thiemowmde, Jc3s5h, Lydia_Pintscher, Denny, Manybubbles, daniel, mkroetzsch, Smalyshev, JanZerebecki, Aklapper, jkroll, Wikidata-bugs, Jdouglas, aude _______________________________________________ Wikidata-bugs mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikidata-bugs
