Terminalia was a Roman festival in honor of the god Terminus, the god of borders between private estates, but above all state borders. His statue was on the border of private properties and was usually in the form of stone. The owners of neighboring properties adorned the statue with wreaths, erected the altar and sacrificed in the form of a little grain, honeycombs, and wine. In addition, a sheep or pig was killed in honor of the deity. The ceremony ended with singing a song of praise.
The public ceremony, in turn, involved performing similar rituals on the sixth milestone along the road to Laurentum (between Ostia and Lavinium). The ceremony took place here probably because it was originally the border of the Roman state.
The holiday was celebrated on February 23.