public function isSagittarius()
    {
        return ($this->month === self::MONTH_NOVEMBER) && ($this->day >= 23) && ($this->day <= 30) || ($this->month === self::MONTH_DECEMBER) && ($this->day <= 21);
    }
public function isSagittarius()
    {
        return ($this->month === self::MONTH_NOVEMBER) && ($this->day >= 23) && ($this->day <= 30) || ($this->month === self::MONTH_DECEMBER) && ($this->day <= 21);
    }
public function isSagittarius ( ) { return ( $ this -> month === self :: MONTH_NOVEMBER ) && ( $ this -> day >= 23 ) && ( $ this -> day <= 30 ) || ( $ this -> month === self :: MONTH_DECEMBER ) && ( $ this -> day <= 21 ) ; }
Checks whether the sign is Sagittarius

@return boolean
Checks whether the sign is Sagittarius