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=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,7dadb26e573572d X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2003-12-08 23:40:24 PST Path: archiver1.google.com!news2.google.com!newsfeed2.dallas1.level3.net!news.level3.com!news-out.visi.com!petbe.visi.com!dimensional.com!pulsar.dimensional.com!news.moat.net!news.primus.ca!news.primus.ca!prodigy.com!prodigy.com!attbi_feed4!attbi.com!attbi_s53.POSTED!not-for-mail From: tmoran@acm.org Newsgroups: comp.lang.ada Subject: Re: ada calendar References: X-Newsreader: Tom's custom newsreader Message-ID: NNTP-Posting-Host: 24.6.133.123 X-Complaints-To: abuse@comcast.net X-Trace: attbi_s53 1070955623 24.6.133.123 (Tue, 09 Dec 2003 07:40:23 GMT) NNTP-Posting-Date: Tue, 09 Dec 2003 07:40:23 GMT Organization: Comcast Online Date: Tue, 09 Dec 2003 07:40:23 GMT Xref: archiver1.google.com comp.lang.ada:3259 Date: 2003-12-09T07:40:23+00:00 List-Id: > Will this revision include definitions based on precise > description of movements of the Earth ? The rotation My understanding is that Ada.Calendar is basically a wall clock - it can be reset by the operator for Daylight Savings, leap seconds, clock skew, or whatever. It's the right thing to use for printing a date & time on a report, for instance. Ada.Real_Time has a monotonic clock so it's generally the right thing for elapsed time. Inserting a leap second for instance would cause the clock to run backwards one second, which would be illegal for Ada.Real_Time.Clock, but perfectly OK for Ada.Calendar.Clock