I have some code which checks the entry in a cell is a date and prompts the
user for a date if it's not:

Dim ADate
Dim Message, Title, Default
Message = "Enter the date as d/m/yy"
Title = "Date Format"
Default = "25/12/07"
Worksheets("Summary").Range("E4").Activate
ActiveCell.NumberFormat = "d/m/yy"
ADate = ActiveCell
Do Until IsDate(ADate)
' Display message, title, and default value.
ADate = InputBox(Message, Title, Default)
ActiveCell.Value = ADate
Loop
ActiveCell.NumberFormat = "d mmmm yyyy"

The trouble is, if as the user, I input 1/8/07 (in place of "1st Aug 07"),
it returns the US format. ie 8 January 2007.
Can anyone help to correct this, please?

Apologies if you recognise any of the code - it is plagiarised from this site.
Thanks