public function get_trial_end_date( $format = 'Y-m-d H:i:s' ) {

		if ( ! $this->has_trial() ) {

			$trial_end_date = '';

		} else {

			// Retrieve the saved end date.
			$trial_end_date = $this->get_date( 'date_trial_end', $format );

			// If not saved, calculate it.
			if ( ! $trial_end_date ) {

				$trial_end_date = $this->calculate_trial_end_date( $format );

			}
		}

		return apply_filters( 'llms_order_get_trial_end_date', $trial_end_date, $this );
	}