theres no spry, so the format only needs to be changed for the date picker.
find this line:
to change the format:
but remember, the date that gets inserted to the database must be in the yyyy-mm-dd format, so code will need to be added to change the format that is passed. the code will be similar to this:
if(isset($_POST['dateField'])) $_POST['dateField'] = date("Y-m-d", strtotime($_POST['dateField']));