public function weekOfYear($week)
    {
        $this->setScheduleMonth(self::NONE);
        $this->setScheduleWeek($this->parseTimeParameter($week));
        $this->setScheduleDayOfMonth(self::ANY);
        $this->setScheduleDayOfWeek(Day::SUNDAY);
        $this->setScheduleHour(0);
        $this->setScheduleMinute(0);

        return $this;
    }