public function readQDateTime()
    {
        $day = $this->readUInt();
        $msec = $this->readUInt();
        /*$isUtc = */ $this->readBool();

        if ($day === 0 && $msec === 0xFFFFFFFF) {
            return null;
        }

        // days since unix epoche in seconds plus msec in seconds
        $time = ($day - 2440588) * 86400 + $msec / 1000;

        $dt = \DateTime::createFromFormat('U.u', sprintf('%.6F', $time));
        $dt->setTimezone(new \DateTimeZone(date_default_timezone_get()));

        return $dt;
    }