ACC2000: How to Find Number of Working Days Between Two Dates

ID: Q210562

The information in this article applies to:
Moderate: Requires basic macro, coding, and interoperability skills.

This article applies to a Microsoft Access database (.mdb) and a Microsoft Access project (.adp).


SUMMARY

This article shows you how to calculate the number of working days between two dates.


MORE INFORMATION

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Microsoft Access does not have a built-in function to determine the number of working days between two given dates. To determine this, you need to call a user-defined function. The following function includes the start date and the end date; so, the number of days between 02/02/99 and 02/03/99 equals one. Create a module and type the following line in the Declarations section if it is not already there: 

Option Explicit
Type the following procedure: 


Function Work_Days(BegDate As Variant, EndDate As Variant) As Integer

   ' Note that this function does not account for holidays.

   Dim WholeWeeks As Variant
   Dim DateCnt As Variant
   Dim EndDays As Integer

   BegDate = DateValue(BegDate)
   EndDate = DateValue(EndDate)
   WholeWeeks = DateDiff("w", BegDate, EndDate)
   DateCnt = DateAdd("ww", WholeWeeks, BegDate)
   EndDays = 0
   Do While DateCnt < EndDate
      If Format(DateCnt, "ddd") <> "Sun" And _
        Format(DateCnt, "ddd") <> "Sat" Then
         EndDays = EndDays + 1
      End If
      DateCnt = DateAdd("d", 1, DateCnt)
   Loop
   Work_Days = WholeWeeks * 5 + EndDays

End Function
To call the function, you can pass either a valid string or an actual date value. The following are two ways to call this function from the Immediate window: 

?Work_Days("01/01/1996", "12/31/1999")
The date range above returns 1042. 

?Work_Days(#03/05/1999#, #04/06/1999#)
The date range above returns 22.

Additional query words: inf modules day/time workday determine 


Keywords          : kbprg kbdta AccCon KbVBA 
Version           : WINDOWS:2000
Platform          : WINDOWS 
Issue type        : kbhowto

Last Reviewed: July 6, 1999