(Dies Lustricus), that on which the lustrations were performed for a child, and its name given, which was usually the ninth day after the birth of a boy, and the eighth after that of a girl; though some performed the ceremony on the last day of the week in which the child was born, and others on the fifth day after its birth.

Over this feast-day the goddess Nundina was supposed to preside. The midwives, nurses, and domestics handed the child backwards and forwards, around a fire burning on the altars of the gods, after which they sprinkled it with water; and hence this feast received the name of amphidromia. The old women mixed saliva and dust with the water; and the whole ended with a sumptuous entertainment. The parents received gifts from their friends on this occasion. If the child was a male, their door was decked with an olive garland; if a female, with wool, denoting the work about which women were employed.