protected function _getBirthday()
 {
     if ($this->userInfo->getBirthday()) {
         if (strpos($this->userInfo->getBirthday(), '0000') === false) {
             $birthday = date('F j, Y', strtotime($this->userInfo->getBirthday()));
         } else {
             $birthday = date('F j', strtotime(str_replace('0000', '1970', $this->userInfo->getBirthday())));
         }
         return $birthday;
     }
     return null;
 }