XL: Date Returned in a Macro Is Four Years Too Early

ID: Q157035

The information in this article applies to:

Microsoft Excel for Windows 95, version 7.0
Microsoft Excel 97 for Windows

SYMPTOMS

When you run a macro that uses a date from a worksheet cell, the date returned by the macro may be four years and one day earlier than the actual date.

CAUSE

A macro returns a date that is four years and one day earlier when you select "1904 date system" in the Calculation tab of the Options dialog box, and one of the following conditions is true:

The macro uses the Value2 property when it stores the date.

The macro uses a function in the Microsoft Excel application library when it stores the date.

WORKAROUND

The following macro determines whether the 1904 date system is selected, converts a date to the 1900 date system, and returns the expected date.

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To use the macro, follow these steps:

To insert a new workbook, click New on the File menu, click workbook, and then click OK.

On the Tools menu, click Options, click the Calculation tab, and then click "1904 date system." Then, click OK.

Type the following dates in Sheet1:
A1: 7/5/96
A2: 5/11/96
A3: 4/28/96

On the Tools menu, point to Macro and click Visual Basic Editor. In the Visual Basic Editor, click Module on the Insert menu.

Type the following code into the module sheet:


      Sub DateTest()
         'dimension date variable
         Dim dDate As Date
         'store minimum date in range into variable
         dDate = Application.Min(Worksheets(1).Range("A1:A3"))
         'display stored date
         MsgBox "Stored date" & Chr(13) & dDate
         'check for 1904 date system
         If Application.ThisWorkbook.Date1904 Then
          'convert 1904 base date to 1900 base date
          dDate = DateSerial(Year(dDate) + 4, Month(dDate), Day(dDate) + 1)
          'display converted date
            MsgBox "Converted date" & Chr(13) & dDate
         Else
            MsgBox "1904 date system is not enabled"
         End If
      End Sub

To run the macro, point to Macro on the Tools menu, and click Macro. Select DateTest and click Run.

The first message box appears with a date 4/27/92, which is four years and one day earlier than the earliest date in the range of cells A1 to A3. The second message box displays the correct "converted" date of 4/28/96.

STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article.

MORE INFORMATION

Visual Basic for Applications does not automatically detect the 1904 date system and convert the date as necessary. If a user selects the 1904 date system in Microsoft Excel, and runs a macro that reads a date from a worksheet cell, the difference may be four years and one day (the extra one day accounts for the leap year). For example, a date of 9/1/96 in the 1904 date system may return a date of 8/31/92.

The date system discrepancy may occur in Visual Basic when you select the 1904 date system and the macro uses the Value2 property when it stores the date.

The Value2 property is a new property in Visual Basic that you can use in Microsoft Office 97. The Value2 property stores variables in the same way as the Value property except that it does not use the Currency or Date data types.

Additional query words: XL97 XL7 8.00

Keywords : kbprg kbdta kbdtacode KbVBA xlvbainf
Version : WINDOWS:7.0,97
Platform : WINDOWS
Issue type : kbprb