Valentine Hearts Guide

At least that's the theory. Yet just as mysterious and accidental as
love itself is the relationship of St. Valentine to the customs of the day
named for him.
Legends abound regarding the origins of Valentine's Day. Some relate
it to an ancient Roman fertility festival called Lupercalia, which
apparently occurred on February 15th, not the 14th.
The spoil-sport Encyclopedia Britannica, in the authoritative 11th
edition of 1911, states, "Their appropriateness to the spring season is,
in a general way perhaps, obvious enough, but the association of the
lovers' festivals with St Valentine seems to be purely accidental."