It seemed pretty simple, drop a spinner on the worksheet, stick some code
into the spinup and spindown to add or subtract 1 to/from the value in a
certain cell. Just because the value is a date shouldn't make any difference,
after all it's just another number.
So why does this retrieve the value of Zero everytime it fires? Yea, I put
the current date into the cell F5, then when I click on the spinup the value
in F5 becomes Zero! And of course it puts the Zero value +1 back into the
cell.
What the heck is heck is going on?! :/)

Private Sub SpinButton1_SpinDown()
Range("F5").Value = DateValue(Range("F5").Value) - 1
End Sub

Private Sub SpinButton1_SpinUp()
Range("F5").Value = DateValue(Range("F5").Value) + 1
End Sub