Here is a Valentine's day card about jewelry, which is the best friend of women. Formal notes, or valentines, first emerged in the 1500s, and commercially printed cards were widely used by the late 1700s. In the mid-nineteenth century, the first commercial valentines were printed in the United States. Cupid, the Roman god of love, is frequently shown on Valentines Day, along with hearts, which are typically the seat of emotion. Birds became a symbol of the day since it was considered that the avian mating season began in mid-February. Candy and flowers, particularly red roses, a sign of beauty and love, are traditional gifts.