LOS ANGELES, Calif.—Valentine's Day is celebrated on Feb. 14 because that is the day Pope Gelasius declared at about 498 to honor the martyr Valentinus and end a pagan celebration.
Valentinus was executed for his Christian beliefs. While jailed, he allegedly restored the sight of his jailer's blind daughter.
The night before his execution, he wrote a farewell note to the girl, which he signed, "From your Valentine.'' He was executed on Feb. 14, 269.