One of the many features of Excel is being nosy. That's right, you can quickly calculate a persons age as long as you have their birth date.

We show you how to use Excel to count days between two dates using the DAYS, DATEDIF, NETWORKDAYS, and TODAY functions, and Subtraction.

How to Calculate the Midpoint of Two Dates in Excel. When you enter a number into an Excel cell that looks like a date, such as "Jun-1" or "6/1," Excel automatically adjusts the format of the cell ...