Here is a Valentine's day card about the cake and the romance atmosphere. The 14th of February is Valentine's Day. Candy, flowers, and presents are shared between loved ones across the United States and around the world on Valentine's Day, all in the name of St. Valentine. But who is this enigmatic saint, and where did these customs originate? Learn about the history of Valentine's Day, from the ancient Roman springtime festival of Lupercalia to Victorian England's card-giving habits.