Hi:

I almost have it working and found a problem while testing.  Here are 
some test dates and the results:
28 Feb 1992 Sat - 0 works
29 Feb 1992 Sun - 1 works
28 Feb 2000 Mon - 2 works
29 Feb 2000 Tue - 3 works
 1 Mar 2000 Wed - 4 works
28 Feb 2004 Sat - shows Sun 1
29 Feb 2004 Sun - shows Mon 2

When manually calculated as follows 28 Feb 2004 comes out Sunday.  What 
am I doing wrong?

Zeller year for Feb 2004 is 03 (-1 because month is Feb)
Zeller Month number is 12 (Jan & Feb are month # 11 & 12 of prior year 
so Feb 29 falls at year end)
Zeller Century is 6 (i.e. 20MOD7)
Zeller Day of Month is 0 (i.e. 28MOD7=0)
Zeller DOW = Z_DOM + 13*(Z_month+1)/5 + Z_Year + Z_Year/4 + Z_Century/4 
+ 5*Z_Century
           =   0   +  5 (33MOD7)      +  3     +   0      +     5       
+ 2 (100MOD7)
           = 1 (15MOD7) = Sunday

Have Fun,

Brooke Clarke

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