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From: Michael & Amy Hartsough <Hartsough@worldnet.att.net>
Subject: Re: Julian Dates package?
Date: 1997/01/13
Message-ID: <32DAF89C.5F59@worldnet.att.net>#1/1
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references: <32CFFA13.5BF8@ibm.net> <01bbfb55$c9dcbfe0$5e2d5c8b@jerryware>
 <1997Jan9.114643.5493@news>
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Date: 1997-01-13T00:00:00+00:00
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Gautier wrote:
> 
> In article <01bbfb55$c9dcbfe0$5e2d5c8b@jerryware>, "Jerry van Dijk" <jvandyk@ibm.net> writes:
> > Jay Joiner <jjoiner@ibm.net> wrote in article
> > <32CFFA13.5BF8@ibm.net>...
> >
> >> I am interested in doing a Biorythm calculator in Ada and I need an
> > Ada
> >> package that can take the difference between two dates (birthdate and
> >> today).
> >
> > I thought Julian dates were mainly used for astronomy and such ?
> >
> > Jerry.
> 
> Julian dates are used for hydrological data and I guess many
> applications of this type, where cyclical phenomena do not
> depend of the existence of a 29 february in the year...
> 
> Here is a "minimal" package, adapted from one of my toolbox in
> another language that works well, but not yet tested in Ada:

Several years ago I wrote a "full up" Gregorian-To-Julian-To-Gregorian package.
It's based upon the algorithms in Jean Meeus' book "Astronomical Algorithms".
If you're not satisfied with what you receive in the other posts, let me know
and I'll "dust it off" for you.

Later,
	Michael