This month’s column shows how to use the remarkably versatile AGGREGATE function in Excel.

Excel’s EOMONTH () function returns the last day in a month, and it handles leap years. Most users will use it to determine maturity dates, due dates, and even forecasting.

Formulas are powerful tools for performing calculations and analyzing data in Excel. In this beginner’s guide, you’ll learn how to use formulas and explore some popular built-in functions.

How to use a DAYS function in Excel In this tutorial, we will find the number of days between the dates in the month. Click the cell where you want to see the result, then type =DAYS (A3, B3).