ante diem xviii kalendas octobres
- ludi Romani (day 10 )
- equorum probatio — the official cavalry parade of the equites (in conjunction with the above)
- 23 A.D. — death of Nero Claudius Drusus (Drusus the Younger), son of the emperor Tiberius and Vipsania Agrippina
- 81 A.D. — official dies imperii of Domitian (recognition by the senate)
- 208 A.D. — birth of the future emperor Diadumenianus?
- 258 A.D. — martyrdom of Cyprian