public function isGemini()
    {
        return ($this->month === self::MONTH_MAY) && ($this->day >= 22) && ($this->day <= 31) || ($this->month === self::MONTH_JULY) && ($this->day <= 21);
    }
public function isGemini()
    {
        return ($this->month === self::MONTH_MAY) && ($this->day >= 22) && ($this->day <= 31) || ($this->month === self::MONTH_JULY) && ($this->day <= 21);
    }
public function isGemini ( ) { return ( $ this -> month === self :: MONTH_MAY ) && ( $ this -> day >= 22 ) && ( $ this -> day <= 31 ) || ( $ this -> month === self :: MONTH_JULY ) && ( $ this -> day <= 21 ) ; }
Checks whether the sign is Gemini

@return boolean
Checks whether the sign is Gemini