Can try this:
If it's an unbound field, in the format line, do not pick short date, can type in mm/dd/yyyy or mm/dd/yy.
If it's a field bound to a table, you can chose short date then put this formatting in the input mask area of the table def to this:
99/99/00;0
If the form is referenced to a query, and the field is called date, do this in the column of the query:
NewDate: format([date],"mm/dd/yyyy")
Then put in the field called NewDate into your form.
Hope that helped.
Deb