ante diem xviii kalendas maias
- ludi Cereri continue (day 3) — games in honour of the grain goddess Ceres, instituted by/before 202 B.C.
- 69 A.D. — first battle at Bedriacum; the forces of emperor wannabe Vitellius eventually would defeat the forces of emperor wannabe Otho
- 73 A.D. — mass suicide at Masada (?)
- 195 A.D. — Julia Domna, wife of the emperor Septimius Severus, is given the title mater castrorum (“mother of the camp”)