public function set_date( $date_key, $date_val ) {

		// Convert to timestamp if not already a timestamp.
		if ( ! is_numeric( $date_val ) ) {
			$date_val = strtotime( $date_val );
		}

		$this->set( 'date_' . $date_key, date( 'Y-m-d H:i:s', $date_val ) );

		switch ( $date_key ) {

			// Reschedule access expiration.
			case 'access_expires':
				$this->maybe_schedule_expiration();
				break;

			// Additionally update the next payment date & don't break because we want to reschedule payments too.
			case 'trial_end':
				$this->set_date( 'next_payment', $this->calculate_next_payment_date( 'U' ) );

				// Everything else reschedule's payments.
			default:
				$this->maybe_schedule_payment( false );

		}

	}