So the forums here have really helped me out! I have this working day calculator that helps me calculate turn-around time.

But now I'm running into trouble and I have no idea why.

The formula works great up until July 8, 2013 - after which all dates are 1/13/00 - Why does this happen and how do I fix it?

In the future, will I be able to just change the dates in H1:H6 (or even add dates) and just modify the dates in A column?

Galaxy 2013 Jan - December.xls

Thank You for all the help!