Day-of-week calculation

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Article #945

#945

From: "John S. Fisher"
Date: Thu, 04 Jan 1990 18:32

19 lines
1086 bytes

More REXX code.  The DAYS procedure, below, computes number of days since
02/28/1900 for an mm/dd/yy date.  Use the remainder of that number divided
by 7 to get day of week.

/*********************************************************************/
/* DAYS    Compute days since 02/28/00.                              */
/*********************************************************************/
DAYS: Procedure;
 arg mm'/'dd'/'yy;
 mm = mm - 3;
 if mm < 0 then do;
    yy = yy - 1;
    mm = mm + 12;
 end;
 return( trunc((5+306*mm)/10) + dd + 365*yy + trunc(yy/4) );



/JSFisher

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From: FISHER@RPIECS.BITNET ("John S. Fisher")
Newsgroups: comp.lang.asm370
Subject: Day-of-week calculation
Message-ID: <9001042228.AA12914@brazos.rice.edu>
Date: 4 Jan 90 18:32:38 GMT
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Reply-To: IBM 370 Assembly Programming Discussion List <ASM370%UCF1VM.BITNET@ricevm1.rice.edu>
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