Moderne Instrumente der Historischen Chronologie - Taschencomputer ersetzen umfangreiche Tabellenwerke

Abstract

All important calender systems are based upon either the solar year or the lunar year. In the first part of this paper, conformities and differences are regarded. Dating problems or questions of chronological concordance usually are solved even today by using voluminous editions in tabulated form being not free of calculating ard piinting errors which accumulate with using and reading errors. As well error-probability as access-time can be reduced by using a pocket-book large micro-computer. In this article an user-oriented computer program is described beeing capable of any mutual transfer of any date of Julian or gregorian calender, the muslim higra calender, the iraniar- sun-hig'ra calender, the byzantine world aera or the enumeration of 'juliani dies' or 'dies christiani'. Weekly days and medival 'indictiones' are calculated as well as the distance of any two dates of equal or different calender systems. The program is capable to add or subtract to any date any number of days and transform the solution-date to any other calender system. Finally, every moving festive day being dependent of Easter or Advent is automatically calculated and transfered to any calender system.