Hey, it's Valentine's Day! Why not celebrate by driving snakes out of Ireland? Wait, no, that's St. Patrick. What did St. Valentine do? Let's check the Catholic Encyclopedia:
One is described as a priest at Rome, another as bishop of Interamna … Of both these St. Valentines some sort of Acta are preserved but they are of relatively late date and of no historical value. Of the third Saint Valentine, who suffered in Africa with a number of companions, nothing further is known.
Well, nuts to those guys. Let's celebrate the Feast Day of Sts. Cyril and Methodius, patron saints of Europe and inventors of the Glagolitic alphabet. That's something worth celebrating!