public function quarterly()
    {
        $months = [Month::JANUARY, Month::APRIL, Month::JULY, Month::OCTOBER];
        $this->setScheduleMonth($this->parseTimeParameter($months));
        $this->setScheduleWeek(self::NONE);
        $this->setScheduleDayOfMonth(1);
        $this->setScheduleDayOfWeek(self::ANY);
        $this->setScheduleHour(0);
        $this->setScheduleMinute(0);

        return $this;
    }