Hello mcp21x,

This function will return the date the active workbook was last saved.
Function WorkbookLastSaved() As Date

  Dim FSO As Object
  Dim FilePath As String
  
    FilePath = ThisWorkbook.FullName
    
      Set FSO = CreateObject("Scripting.FileSystemObject")
      WorkbookLastSaved = FSO.GetFile(FilePath).DateLastModified
    
    Set FSO = Nothing
    
End Function