public function getGamesId($onlyFuture = FALSE) {
    $query = \Drupal::entityQuery('game');
    $query->condition('day', $this->id());
    if($onlyFuture) {
      $now = new \DateTime(NULL, new \DateTimeZone('UTC'));
      $query->condition('game_date', $now->format('Y-m-d\TH:i:s'), '>');
    }
    $query->sort('game_date');
    $query->sort('id');

    return $query->execute();
  }