If you enter DATE(2008,10,1) as the Start_date and 10/1/08 as the End_date it
shows a difference of N=1 workday. Which means the system is subtracting
39722 from 39722 and getting a total of 1.

If you enter DATE(2008,11,1 ) as the Start_date and 11/1/08 as the End_date
it shows a difference of N=0 workdays. Which means the system is correctly
subtracting 39753 from 39753 and getting a total of 0.

What is causing the difference when the same formula is used? Is this a
glitch in the system?