From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-0.3 required=5.0 tests=BAYES_00,FREEMAIL_FROM, REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,287e8ed2b0c0aabf X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2002-07-30 01:20:56 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!news-out.nuthinbutnews.com!propagator-sterling!news-in.nuthinbutnews.com!newsfeed-zh.ip-plus.net!news.ip-plus.net!not-for-mail From: Thomas Wolf Newsgroups: comp.lang.ada Subject: Re: Zeller's Algorithm Date: Tue, 30 Jul 2002 10:20:53 +0200 Organization: --- Message-ID: References: <3D3DED1F.24DE3AC8@lmco.com> <3D3F1C88.B430AC1F@lmco.com> <5ee5b646.0207292035.3736a37c@posting.google.com> Reply-To: t_wolf@angelfire.com NNTP-Posting-Host: pargate2.paranor.ch X-Trace: rex.ip-plus.net 1028017244 28030 195.65.4.190 (30 Jul 2002 08:20:44 GMT) X-Complaints-To: abuse@ip-plus.net NNTP-Posting-Date: Tue, 30 Jul 2002 08:20:44 +0000 (UTC) X-Newsreader: MicroPlanet Gravity v2.50 Xref: archiver1.google.com comp.lang.ada:27477 Date: 2002-07-30T10:20:53+02:00 List-Id: dewar@gnat.com wrote: > > Zeller's *algorithm* does work for dates in the Gregorian calendar. > > What is the reference for this algorithm. I learned it as a child (it is > something you can learn to compute in your head quite easily). > Chr. Zeller, "Kalender-Formeln", Acta Mathematica, Vol. 9, pp. 131--136. (Nov. 1886). In German. See also the URL , an excellent page on Zeller's congruence. -- ----------------------------------------------------------------- Thomas Wolf e-mail: t_wolf@angelfire.com