To get the number of days in a given month from a date, you can use a formula based on the EOMONTH and DAY functions.
In the example shown, the formula in cell B5 is:
=DAY(EOMONTH(B5,0))
=DAY(EOMONTH(date,0))The DAY function returns the day component of a date. The EOMONTH function returns the last day of the month for a given date. So, in this formula EOMONTH first returns a date corresponding to the last day of the month, and then DAY returns the date value for that date.
By definition, the value returned by DAY is always equal to the number of days in the month, since the date supplied to DAY is always the last day.
Author
Hi - I'm Dave Bruns, and I run Exceljet with my wife, Lisa. Our goal is to help you work faster in Excel. We create short videos, and clear examples of formulas, functions, pivot tables, conditional formatting, and charts.
Learn Excel with high quality video training. Our videos are quick, clean, and to the point, so you can learn Excel in less time, and easily review key topics when needed. Each video comes with its own practice worksheet.
View Paid Training & Bundles
