protected function event_status_to_rfc() {

		// Make sure the EventStatus is to spec
		if ( ! empty( $this->event_status_mapping[ $this->event_status ] ) ) {
			return $this->event_status_mapping[ $this->event_status ];
		}

		// Returning EventScheduled/CONFIRMED if spec does not match
		return $this->event_status_mapping[ 'EventScheduled' ];
	}