ante diem kalendas septembres
- rites in honour of Jupiter Liber
- 392 B.C. — dedication of the Temple of Juno Regina on the Aventine (and associated rites thereafter)
- 22 B.C. — dedication of the Temple of Jupiter Tonans (and associated rites thereafter)
- 69 A.D. — traditional date for the sacking of Jerusalem
- 118 A.D. — martyrdom of Terentian in Umbria
- 1987 — death of Arnaldo Momigliano
