Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!rutgers!psuvax1!news From: flee@shire.cs.psu.edu (Felix Lee) Newsgroups: comp.unix.questions Subject: Re: cal program on UNIX systems is wrong!! Message-ID: Date: 4 Aug 89 18:42:05 GMT References: <20492@adm.BRL.MIL> Sender: news@psuvax1.cs.psu.edu Organization: Penn State University Computer Science Lines: 14 In-reply-to: Arnold.Gill%QueensU.CA@qucdn.queensu.ca's message of 4 Aug 89 02:29:47 GMT Yes, the Gregorian calendar was decreed in the sixteenth century. The Germanic states did not adopt it until the seventeenth century. England and its colonies did not adopt it until the eighteenth century. A side effect of the Protestant Reform. Papal Bulls are binding only to Roman Catholics. Calendars and dates are not particularly straightforward. Muslim, Jewish, and Chinese calendars are still in common use. And consider curiosities, such as the French Revolutionary calendar. For modern astronomical purposes, it's as well to calculate Julian day number using the Gregorian calendar as decreed. -- Felix Lee flee@shire.cs.psu.edu *!psuvax1!flee