Date:         Fri, 18 Jan 2002 15:01:34 +0000
Reply-To:     dkb@CIX.COMPULINK.CO.UK
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         dkb@CIX.COMPULINK.CO.UK
Organization: Nextra UK
Subject:      Re: age calculations etc

Dennis Diskin posts:

> There are certainly several ways to do this. One would be:
> daystobd = mod(juldate(&refer),1000) - mod(juldate(birth),1000);
> This will give you a negative if &refer is past the birthday in the
current
> year.

I'm afraid there is a problem with using this technique:  leap years.
My birth date, 5th June, was day number 156 of 1957.  Because 2000 was a
leap year, if my referral date was 4th June 2000, that too would be day
number 156 and daystobd would incorrectly be calculated as 0 instead of
1.

Kind regards,

Dave

.