Understanding Excel's date and time serial numbers can help in calculating differences between dates, adding days, adjusting times, and more.

If numbers keep changing to dates automatically in Excel or if Excel changes dates to random numbers then this post will help you fix the issue.

How to convert time values into decimal values in Excel Internally, Excel stores the time as a decimal value. The quickest way to see that time value is to change the format.

Excel offers several easy ways to calculate expiry dates. This post explores different ways to automate expiry date calculations in Excel.