St. Valentine's Day originated as a festival clebrated by which of these groups: the Romans, the Greeks, or the Irish?

The romantic holiday of St. Valentine's Day has its roots in an ancient Roman festival. This predecessor to the modern celebration of love was a pagan fertility festival known as Lupercalia, which was celebrated from February 13 to 15. The festival was held in honor of Lupercus, the Roman god of shepherds and fertility, and was also tied to the legendary founders of Rome, Romulus and Remus.

Lupercalia involved unique rituals intended to promote fertility and purify the city. Priests known as the Luperci would sacrifice goats and a dog. They would then cut strips from the goat hides, called februa, and run through the streets, gently striking women with them. This act was believed to ensure fertility and a healthy childbirth. The name of the month, February, is even derived from the Latin word for purification, "februum."

While the modern traditions of Valentine's Day, such as exchanging cards and gifts, developed much later, the timing of the celebration in mid-February is believed to be a holdover from Lupercalia. In the 5th century, Pope Gelasius I is said to have replaced the pagan festival with St. Valentine's Day, celebrated on February 14. This move was likely an attempt by the early Christian church to repurpose existing pagan traditions to facilitate the spread of Christianity among the Roman population.

Although some traditions connect to other cultures, such as the presence of St. Valentine's relics in Dublin, Ireland, the foundational origins of the festival date back to the Romans. The Greek Orthodox Church does not officially recognize Saint Valentine, considering the tradition to be of Western origin. While some scholars have noted parallels between Lupercalia and rural Greek springtime rituals, there was no direct equivalent to Valentine's Day in ancient Greece.