Excel EOMONTH() function

Last update on August 19 2022 21:50:34 (UTC/GMT +8 hours)

EOMONTH() function

This function is used to return the serial number for the last day of the month that is the indicated number of months before or after start_date.

Version: Excel 2013

Syntax:

EOMONTH(start_date, months)

Parameters:

Name	Description	Data Type	Required/ Optional
Start_date	A date that represents the starting date. Dates should be entered by using the DATE function, or as results of other formulas or functions.	Date	Required
Months	The number of months before or after start_date. A positive value for months yields a future date; a negative value yields a past date.	Date	Required

The point to be remembered that, if months is not an integer, it is truncated.

Remarks

Microsoft Excel stores date as sequential serial numbers so they can be used in calculations. By default, January 1, 1900, is serial number 1, and January 1, 2010, is serial number 40179 because it is 40178 days after January 1, 1900.
when start_date is not a valid date, EOMONTH returns the #NUM! error value.
when start_date plus months yields an invalid date, EOMONTH returns the #NUM! error value.

Example - 1:

The example below finds the date of the last day of the month, one month after the date specified in A2.

Example - 2:

The example below finds the date of the last day of the month, three months before the date specified in A2.

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