Remove Calendar from Date/Time Field

Using Designer 7.0 - Is there a way to remove the calendar from the date/time field. Or, is there a way to require a date format MM/DD/YYYY in another field type. One of my fields is a BirthDate and users are finding the calendar annoying since it starts out on the current date and their birthday was 40 years ago (or whatever). It would be better to just have a field that holds the date format but doesn't have the calendar.