DD/MM/YYYY is the most common date format across the world. You can't seriously expect that because one American is involved that the a whole company (who will

DD/MM/YYYY is the most common date format across the world. You can't seriously expect that because one American is involved that the a whole company (who will work with suppliers and end users of any numbers in any number of places) will work on the date format of the country he grew up in.