excel - if column against other column

I have two excel sheets. One like below:

Sheet 1:

Column 1    Column 2
Date 1      Date 2
Date 1      Date 2
Date 1      Date 2
Date 1      Date 2
Date 1      Date 2
Date 1      Date 2
Date 1      Date 2
Date 1      Date 2
Date 1      Date 2

Sheet 2:

Column 1:   
On Time:      xx
Not on Time:  xx 

So example.

If date 1 is greater than date 2, then it should add 1 to the "Not on time" row. And if date 1 is less than or equals date 2, then it should add 1 to the "On Time" row.

Please note that I have two different sheets in the same workbook

How can I achieve this?