Shouldn't the difference be 366 every four years.  Bob's comments caused me
to worry about leap year, and I am getting incorrect answers but they may be
based on this.

 

diff=: 13 :'(todayno x)-todayno y'

     

       (2005 3 1) diff 2004 2 29

366

      (2004 3 1) diff 2003 2 29

366

      (2003 3 1) diff 2002 2 29

365

      (2002 3 1) diff 2001 2 29

365

      (2001 3 1) diff 2000 2 29

366

      (2000 3 1) diff 1999 2 29

366

      (1999 3 1) diff 1998 2 29

365

      (1998 3 1) diff 1997 2 29

365

      (1997 3 1) diff 1996 2 29

366

      (1996 3 1) diff 1995 2 29

366

   

   

 

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