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

Abstract

The medieval determination of the Easter cy cle has even today a topical evidence in chronology and calendariography, as the easter formula published by C. F. Gauss in 1800 was not accepted in chronology. To verify dates in past and future, both historians and ca lendariographs until now could only use tabular-com pilation based on different systems. The CHRONOS program offers a chronologic/calendariographic funda mentum by means of which you can answer all essential questions of l'art verfier les dates and calendariography. CHRONOS includes a calendarian ranging from 4713 b. C. to 3268 a. C. as well as a computation of the chan geable 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 con vert 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 substi tutes and surpasses the traditional chronological facili ties of the historian. * Address all communications to Werner Bergmann, Fak. f?r Geschichts wissenschaft, Ruhr-Universit?t Bochum, Postfach 102148, D-4630 Bo chum.