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=0.6 required=5.0 tests=BAYES_40,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,92471489ebbc99c6 X-Google-Attributes: gid103376,public From: Gautier de Montmollin Subject: Re: Y2K Issues Date: 1998/10/27 Message-ID: <36365724.EF1CC215@maths.unine.ch>#1/1 X-Deja-AN: 405711066 Content-Transfer-Encoding: 7bit References: <362B53A3.64E266AB@res.raytheon.com> To: John_J_Cupak@res.raytheon.com Content-Type: text/plain; charset=us-ascii Organization: Universite de Neuchatel MIME-Version: 1.0 Newsgroups: comp.lang.ada Date: 1998-10-27T00:00:00+00:00 List-Id: > I also note that the Ada 95 LRM (RM96;6.0) Ada.Calendar package defines > the Year_Number as range 1901..2099. What happens in 2099? The world > ends? Someone in an hydrological bureau had the same shock today reading that LRM topic in AdaHelp, but because of the 1901 problem: many archived time series begin before 1901... (hydrology, geography etc.) => Calendar is useless for it ! One has to program a Calendar bis. It's not that the formulas for this purpose don't exist or are too complicated... And what to think about astronomical calculations / previsions ?... -- Gautier -------- Homepage: http://www.unine.ch/math/Personnel/Assistants/Gautier/Montmollin.html Software: http://www.unine.ch/math/Personnel/Assistants/Gautier/Gaut_FTP.htm.