Excel to check date in clipboard before proceeding

Question

I am trying to come up with a code that will check the users clipboard to ensure that the first value in the clipboard is a date. If not then exit the sub before proceeding. The problem I am having is that this will not be a specific date- but any date. I am using this as an error checker before someone pastes data to make sure it doesnt cause other issues.

Here is the part of the code

    Dim MyText As String
    Dim datevalue As String
    Set MyData = New DataObject
    MyData.GetFromClipboard
    MyDate = MyData.Getdate
    

    If Left(MyText, 2) <> datevalue(date_string) Then Exit Sub

    Sheets("Sheet1").Range("a1") = MyText

When its ran excel says "Compile Error: Expected Array". I assume this is because it is expecting an actual date in in the datevalue(date_string) but I cant figure out how to say "Any Date" as opposed to a specific one? Any help will be greatly appreciated.