"the twenty-fifth day of November, that date kept sacred to Proserpina, Queen of Hades"
Seated Goddess, Probably Persephone (Proserpina)
GNU Free Documentation LicenseSeated Goddess, Probably Persephone (Proserpina) - Credit: Ealdgyth/Wikimedia Commons

 Proserpina was the Roman name for the goddess Persephone, the daughter of Demeter (Roman Ceres) who was desired and carried off by Hades (Roman Pluto), god of the underworld. She spent half the year in the underworld, during which time the plants would die in the world above as her mother mourned, creating autumn and winter. When she returned to her mother for the other half of the year, Demeter’s joy would bring the spring and summer again. Proserpina was offered cult as an underworld deity.