public function weekNumberToWorkRange(int $week, int $year): DatePeriod
    {
        $dto = new DateTime();
        $dto->setISODate($year, $week);
        $dto->setTime(8, 0, 0, 0);

        $start = clone $dto;
        $dto->modify('+4 days');
        $end = clone $dto;
        $end->setTime(18, 0, 0, 0);

        return new DatePeriod(
            start: $start,
            interval: new \DateInterval('P1D'),
            end: $end
        );
    }

    /**
    * @param DateTimeInterface $start
    * @param DateInterval $interval
    * @param DateTimeInterface $end
    * @param int $options Can be set to DatePeriod::EXCLUDE_START_DATE.
    * @link https://php.net/manual/en/dateperiod.construct.php
    */
   public function __construct(DateTimeInterface $start, DateInterval $interval, DateTimeInterface $end, $options = 0) {}