private function get_upcoming_payment_reminder_date( $order, $type, $payment_date = 0 ) {

		$next_payment_date = $payment_date ? $payment_date : $order->get_recurring_payment_due_date_for_scheduler();
		if ( is_wp_error( $next_payment_date ) ) {
			return $next_payment_date;
		}

		/**
		 * Filters the number of days before the upcoming payment due date when to notify the customer
		 *
		 * The dynamic portion of this filter, `$this->id`, refers to the notification trigger identifier.
		 *
		 * @since 5.2.0
		 *
		 * @param integer    $days  The number of days before the upcoming payment due date when to notify the customer.
		 * @param LLMS_Order $order Order object.
		 * @param string     $type  The notification type identifier.
		 */
		$days = apply_filters( "llms_notification_{$this->id}_reminder_days", $this->get_reminder_days( $type ), $order, $type );

		// Sanitize: makes sure it's always a negative number.
		$days = -1 * max( 1, absint( $days ) );

		/**
		 * Filters the next upcoming payment reminder date
		 *
		 * The dynamic portion of this filter, `$this->id`, refers to the notification trigger identifier.
		 *
		 * @since 5.2.0
		 *
		 * @param integer    $upcoming_payment_reminder_time Unix timestamp for the next payment due date.
		 * @param LLMS_Order $order                          Order object.
		 * @param string     $type                           The notification type identifier.
		 */
		$upcoming_payment_reminder_time = apply_filters( "llms_notification_{$this->id}_reminder_date", strtotime( "{$days} day", $next_payment_date ), $order, $type );

		return $upcoming_payment_reminder_time;

	}