ante diem xvi kalendas apriles

Festival of Mars continues (day 17)

Liberalia -- a festival of general merriment and wine drinking in honour of Liber Pater (another name for Bacchus)

Agonalia -- the rex sacrificulus would offer a ram to various deities

45 B.C. -- Julius Caesar defeats Pompey's sons and Labienus at Munda

136 A.D. -- the future emperor Marcus Aurelius dons the toga virilis

180 A.D. -- death of Marcus Aurelius at Bononia

461 A.D. -- death of Saint Patrick (traditional)