Computus und Computer: CHRONOS – ein Programm zur mathematischen und technischen Chronologie

Abstract

The medieval determination of the Easter cycle has even today a topical evidence in chronology and calendariography, as the easier formula published by C. F. Gauss in 1800 was not accepted in chronology. To verify dates in past and future, both historians and calendariographs until now could only use tabular-compilation based on different systems. The CHRONOS program offers a chronologic/ calendariographic fundamentum by means of which you can answer all essential questions of l'art vérfier les dates and calendariography. CHRONOS includes a calendarían ranging from 4713 b.C. to 3268 a.C. as well as a computation of the changeable holidays of the years 293-2499 for the Julian and Gregorian calendar. Moreover it can determine the Jewish Passah holiday and the Jewish New Year's day. Especially interesting for the historians is the possibility to find out the computistic key-dates of a year, to convert the eras used in historiography, and to implement the medieval calendar of saints. In this connection the Mohammedian calendar is also offered in concordance with the Christian one. The Chronos program substitutes and surpasses the traditional chronological facilities of the historian.