Interesting summation by Wiki.
I like it!
Valentine’s Day. . . originated as a Christian feast day honoring a martyr named Valentine, and through later folk traditions it has also become a significant cultural, religious and commercial celebration of romance and love in many regions of the world.
There are a number of martyrdom stories associated with various Saint Valentines connected to February 14, including an account of the imprisonment of Saint Valentine of Rome for ministering to Christians persecuted under the Roman Empire in the third century. According to an early tradition, Saint Valentine restored sight to the blind daughter of his jailer.
Numerous later additions to the legend have better related it to the theme of love: tradition maintains that Saint Valentine performed weddings for Christian soldiers who were forbidden to marry by the Roman emperor. an 18th-century embellishment to the legend claims he wrote the jailer’s daughter a letter signed “Your Valentine” as a farewell before his execution.