/**
 * Gets the birthday of the current patient and returns it as 
 * a java.util.Calendar.
 * 
 * @return:
 * The birthday of the current patient.
 */
function getBirthdayOfCurrentPatient () {
   /* ======================================== */
   // IMPORTS
   importPackage(java.util);
 
   var birthday = new GregorianCalendar();
   birthday.setTime(patient.getBirthDate());
 
   return birthday;
   /* ======================================== */
}