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From: jsulliva@cvbnet.UUCP (Jeff Sullivan, x4096 MS 4-2)
Newsgroups: comp.sources.wanted
Subject: day-of-week algorithm wanted
Message-ID: <415@cvbnet.Prime.COM>
Date: 2 Feb 90 16:28:32 GMT
Sender: postnews@cvbnet.Prime.COM
Distribution: usa
Lines: 15
References:


  I am looking for the algorithm (or C source) to figure
  out the day of the week given a particular date. Such
  an algorithm is used in most calendar programs, such as
  'cal' in Unix.
  For example:
	12/25/1960      Sunday
	2/2/2000        Wednesday
  One simple (brute-force) way is to reset the date in
  your program and get the time (tm structure).
    int tm_wday;     /* day of week (Sunday = 0) */
  There's gotta be a better way!

  Thanks in advance,
  -Jeff