Valentine's Day originated from St. Valentine, a Roman who was martyred for refusing to give up Christianity. According to legend, St. Valentine left a farewell note for the jailer's daughter before his death, signing it "From Your Valentine." In 496 AD, Pope Gelasius set aside February 14 to honor St. Valentine. Today, Valentine's Day is celebrated as a day of love, with couples exchanging cards and gifts. The holiday has its roots in ancient Roman festivals held in mid-February.