jQuery UI Datepicker - Populate alternate field
$(function() {
$("#datepicker").datepicker({altField: '#alternate', altFormat: 'DD, d MM, yy'});
});
Date:
Populate an alternate field with its own date format whenever a date is selected using the altField and altFormat options. This feature could be used to present a human-friendly date for user selection, while passing a more computer-friendly date through for further processing.