Horde_Date::__isset PHP Method

    public function __isset($name)
    {
        if ($name == 'day') {
            $name = 'mday';
        }
        return ($name == 'year' || $name == 'month' || $name == 'mday' || $name == 'hour' || $name == 'min' || $name == 'sec') && isset($this->{'_' . $name});
    }