Formal messages, or valentines, showed up within the 1500s, and by the late 1700s commercially printed cards were being utilized. The first commercial valentines within the United States were printed within the mid-1800s. Valentines commonly portray Cupid, the Roman god of affection, in conjunction with hearts, customarily the situate of emotion. Since it had been thought that the avian mating season starts in mid-February, birds also need to be a picture of the day. Conventional endowments incorporate sweet and blooms, particularly red roses, a picture of excellence and love.