So where did the world get this holiday named Valentine’s Day? Most sources say it’s a day named for a Christian martyr and dates back to the 5th century but has origins in the Roman holiday Lupercalia. The roots of St. Valentine’s Day lie in the ancient Roman festival of Lupercalia, which was celebrated on Feb. 15. For 800 years the Romans had dedicated this day to the god Lupercus. On Lupercalia, a young man would draw the name of a young woman in a lottery and would then keep the woman as a sexual companion for the year.