Attested traditions

Lupercalia
Main article: Lupercalia
Though popular modern sources link unspecified Greco-Roman February holidays alleged to be devoted to fertility and love to St Valentine's Day, Professor Jack Oruch of the University of Kansas argued[16] that prior to Chaucer, no links between the Saints named Valentinus and romantic love existed. Thus, it is immaterial to the history of Valentine's Day whether or not in the ancient Athenian calendar the period between mid-January and mid-February was the month of Gamelion, dedicated to the sacred marriage of Zeus and Hera.
In Ancient Rome, Lupercalia, observed February 13 through 15, was an archaic rite connected to fertility, without overtones of romance. Lupercalia was a festival local to the city of Rome. The more general Festival of Juno Februa, meaning "Juno the purifier "or "the chaste Juno," was celebrated on February 13-14. Pope Gelasius I (492-496) abolished Lupercalia.
While it is a common opinion that the Christian church may have decided to celebrate Valentine's feast day in the middle of February in an effort to christianize celebrations of the pagan Lupercalia, no connection has been demonstrated.