The ancient festival celebrated in honor of the Roman god Saturn is called Saturnalia. It was held annually in December and was characterized by a spirit of revelry and goodwill. The festivities included feasting, gift-giving, and social inversion, where roles between slaves and masters were temporarily reversed. Saturnalia was one of the most popular festivals in ancient Rome, featuring public celebrations, games, and parties. It served both a religious purpose, honoring the agrarian god of sowing and seed, and a social function, allowing Rome's citizens to relax and indulge in merriment during the winter months.