Microsoft KB Archive/123189

= Alternative EOMONTH Worksheet and Macro Functions =

Article ID: 123189

Article Last Modified on 8/15/2005

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APPLIES TO


 * Microsoft Excel 97 Standard Edition
 * Microsoft Excel 95 Standard Edition
 * Microsoft Excel 5.0 Standard Edition

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This article was previously published under Q123189





SUMMARY
In Microsoft Excel, you can duplicate the functionality of the EOMONTH function, which is available in the Analysis ToolPak add-in, either by combining worksheet functions or by creating a user-defined function procedure.

Note that the Analysis ToolPak add-in is not included in versions of Microsoft Excel earlier than 4.0.



MORE INFORMATION
The EOMONTH function has two arguments: a start date and the number of months to count ahead from the start date. The second argument can be positive, zero, or negative. The result is a serial date value equal to the last day of the specified month.

Worksheet Function
The following worksheet function duplicates the functionality of the EOMONTH function. This example assumes that the date "1/1/98" is entered in cell A1. The formula =EOMONTH(A1,1) is equivalent to the following:

=DATE(YEAR(A1),MONTH(A1)+1,1)-1

Both functions return the value 1/31/98. This function calculates a date equal to the first day of the month that is one month greater than the date you are trying to obtain, then subtracts one day from that date, yielding the last day of the month in question.

Code Examples
Microsoft provides programming examples for illustration only, without warranty either expressed or implied. This includes, but is not limited to, the implied warranties of merchantability or fitness for a particular purpose. This article assumes that you are familiar with the programming language that is being demonstrated and with the tools that are used to create and to debug procedures. Microsoft support engineers can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific requirements. Excel 4.0 Macro Function:

The following macro works in all versions of Microsoft Excel:

A1: MyEoMonth

A2: =ARGUMENT("startDate",1)

A3: =ARGUMENT("months",1)

A4: =RETURN(DATE(YEAR(startDate),MONTH(startDate)+months+1,1)-1

Visual Basic for Applications Function:

The following Visual Basic for Applications function works in Microsoft Excel versions 5.0 and later: Function MyEoMonth(startDate As Date, months As Integer) MyEoMonth = _ DateSerial(Year(startDate), Month(startDate) + months + _          1, 1) - 1 End Function

