Can't get date to appear in US format

We have installed Dolphin 7.1 and are unable to get the birthdate field in the join form to appear as MM-DD-YYYY.  No matter what we try, it always seems to stay in YYYY-MM-DD.  Please help!

Thanks,
Jake

You can try this persons solution:

http://www.boonex.com/forums/?action=goto&search=1#topic/Tip-or-Trick-to-make-the-7-1-Date-Picker-format-US.htm

Keep in mind - the function that covers the age is setup for the date to be yyyy/mm/dd (it subtracts the year first, then the month, then days). Switching the format will break the age function (I have done it before).