entityQuery with multivalue date field
Try this Out:




use Drupal\node\NodeInterface;

    $query = \Drupal::entityQuery('node')
    ->condition('status', NodeInterface::PUBLISHED)
    ->condition('type', 'event')
    ->condition('field_event_date', ['10.09.2018', '11.09.2018', '13.09.2018' ], 'IN')
    ->range(0, 10);

  $result = $query->execute();