Scary code showing how not to code. Found in production

TerribleDateFixer.php

<?php

class DateFixer {
  public function fix(string $date): string {
    $time = new DateTime($date);
    $time->modify('+3 days');
    return $time->format('Y-m-d');
  }
}

// Doctrine
$entity = $entityManager->find(Order::class, 123);
$date = $entity->getShipmentDate()->format('Y-m-d');
$date = DateFixer::fix($date);
$entity->setShipmentDate(new DateTime($date));
$entityManager->persist($entity);