January 24 is the festival of Sementivae, which is a planting festival that honors Ceres and Tellus. Ceres, of course, is the Roman grain goddess, and Tellus is the earth itself. This festival was held in two parts -- the first part was held from January 24 to January 26, honoring Tellus, and was a season of sowing the fields. The second part, which began a week later on February 2, honored Ceres as the goddess of agriculture. Ceres is the Roman variant of Demeter, who is strongly tied with the changing of the seasons.