ACC: How to Determine Number of Working Days Between Two Dates

• Microsoft Access versions 1.0, 1.1, 2.0, 7.0, 97

SUMMARY

Moderate: Requires basic macro, coding, and interoperability skills.

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

This article assumes that you are familiar with Visual Basic for Applications and with creating Microsoft Access applications using the programming tools provided with Microsoft Access. For more information about Visual Basic for Applications, please refer to your version of the "Building Applications with Microsoft Access" manual.

NOTE: Visual Basic for Applications is called Access Basic in Microsoft Access versions 1.x and 2.0. For more information about Access Basic, please refer to the "Introduction to Programming" manual in Microsoft Access version 1.x or the "Building Applications" manual in Microsoft Access version 2.0

MORE INFORMATION

Microsoft Access does not have a 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 02/02/93 and 02/03/93 equals one.

To create the function, follow these steps.

NOTE: In the following sample code, an underscore (_) is used as a line- continuation character. Remove the underscore from the end of the line when re-creating this code in Access Basic.

   Option Explicit

   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

   ?Work_Days("01/01/93", "12/31/96") (returns 1042)

   ?Work_Days(#03/05/93#, #04/06/93#) (returns 22)