Excel may return a serial number instead of a date; because it is stored thus in the backend. Learn how to convert Serial Number to Date.

Navigate to the "Number" group within the "Home" tab in Excel. Click the small arrow beside the "Number Format" box. Click "Text" to convert your cells to text formatting.

How to convert cells to the date format? Open your excel spreadsheet. Select all the cells you want to modify, and right-click on them. Select Format Cells. Go to the Number tab. In the Category list, ...

The "Y" in the example tells Excel to return the year value. Click the "Number Format" drop-down menu in the Number section on the Home tab and select "Number" to format the age to a standard number.