Valentine’s Day is the annual holiday honoring lovers. It is celebrated on February 14 by the custom of sending greeting cards or gifts to express affection. The cards, known as valentines, are often designed with hearts to symbolize love. Every February, across the country, candy, flowers, and gifts are exchanged between loved ones, all in the name of St. Valentine. But who is this mysterious saint and why do we celebrate this holiday? The history of Valentine’s Day — and its patron saint — is shrouded in mystery.