ante diem iii idus apriles
- 421 B.C. — Peace of Nikias brings the first phase of the Peloponnesian war (a.k.a. the Archidamian War) to an end (by one reckoning)
- 52 B.C. — trial of Milo – with Cicero on his side — for the murder of Clodius (by one reckoning)
- 92 A.D. — martyrdom of Antipas
- 145 A.D. — birth of the future emperor Septimius Severus
