## Excel Formula: Count Days of Month

In this tutorial, it provides formulas to count the total days of a specific month or the current month.

Generic formula:

 DAY(EOMONTH(date,0))

Syntaxt and Arguments

 Date: the date that you want to count days of month. The date argument can be a number or date (since the date is stored as number in Excel).

Return Value

The formula returns to a numeric value.

Error

If the date argument is a text value, the formula returns the #VALUE! error.

How this formula works

To count the total days of the specific month in each cell of B3:B6, please use below formula in cell C3:

 =DAY(EOMONTH(B3,0))

Press Enter key and then drag autofill handle down to cell C6.

Explanation

EMONTH function: gets the last day of the month in future or past. EOMONTH(B3,0) gets the last day of month in cell B3, 2/29/2020.

DAY function: gets the days as number from a date.

=DAY(EOMONTH(B3,0))
=DAY(“2/29/2020”)
=29

Remark

1) If you want to automatic return the total days of the current month when the date changes, you can change the generic formula to this:

 DAY(EOMONTH(TODAY(),0))

TODAY function is used to get the current date of today.

2) If you want to get the days from a month name, you can change the generic formula to this:

 DAY(EOMONTH(DATEVALUE("01-"&date&"-"&YEAR(TODAY())),0))

Example: supposing to get the days from the month name in cell B9, please use the formula as this:

=DAY(EOMONTH(DATEVALUE("01-"&B9&"-"&YEAR(TODAY())),0))

Press Enter key to get the result.

YEAR function: returns the year based on the given date.

DATEVALUE function: converts a date stored as text format to a valid date.

=DAY(EOMONTH(DATEVALUE("01-"&B9&"-"&YEAR(TODAY())),0))
=DAY(EOMONTH(DATEVALUE("01-"&B9&"-"&2020),0))
=DAY(EOMOTH(“1/1/2020”,0))
=DAY("1/31/2020")
=31

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