From: Jason Green <news AT jgreen4 DOT fsnet DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: strftime: Need Help with Time Offsets
Date: Thu, 11 Jan 2001 21:56:51 +0000
Organization: Customer of Energis Squared
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To: djgpp AT delorie DOT com
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JT Williams <jeffw AT darwin DOT sfbr DOT org> wrote:

> Formulae for leap year, day of week, day of year, day of Easter,
> etc., etc., etc. and much much more are all given in Jean Meeus'
> "Astronomical Algorithms" and could save much effort here and/or
> provide a check on one's own algorithms.

I spent some time searching on the web for this.  There are plenty of
references to Jean Meeus' work, even some source code, but I couldn't
find anything to help.

Note that it is not particularly calculation of week numbers that is
the problem, DJGPP already does that.  The problem is [was] that the
required calculation sometimes results with the last few days of the
year as week 01 and/or the first few days as week 52 or 53.