Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!ames!amdahl!pacbell!sactoh0!brent
From: brent@sactoh0.UUCP (Brent K. Barrett)
Newsgroups: comp.binaries.ibm.pc.d
Subject: Re: Looking for D.O.W. algorithm
Summary: C source
Message-ID: <1839@sactoh0.UUCP>
Date: 16 Sep 89 17:54:17 GMT
References: <6470@hubcap.clemson.edu>
Organization: Sacramento Public Access, Ca. USA
Lines: 20

In article <6470@hubcap.clemson.edu>, chrisb@hubcap.clemson.edu (Chris) writes:
> Hi, 
>   I am looking for an algorithm which gives the day of the week (M,T,W,Th,...)
> for a given date... (9,15,1989) Sept 15, 1989 --- would be Friday. 

 It's a BIOS call.  Here's a simple C function that returns the
D.O.W. (0=Sunday, 1=Monday, ... etc.):

int dow()
{
    _AX = 0x2A00;
    geninterrupt(0x21);
    return(_AL);
}
 

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