Valentine's Day symbols include hearts, cupids, cards, chocolates, roses, love knots, doves, and birds. Hearts have symbolized love and emotion since Roman times. Exchanging Valentine's cards and gifts of chocolate and roses are popular traditions on February 14th. Love knots symbolize the connection between couples, while doves represent peace, loyalty and lifelong commitment between mates. Cupid, the god of desire, is thought to make people fall in love with arrows.