pridie kalendas septembres

• 12 A.D. — birth of the future emperor Gaius (Caligula) at Antium
• 40 A.D. — Gaius (Caligula) celebrates an ovatio after his attempted military campaigns in Gaul and Britain
• 161 A.D. — birth of the future emperor Commodus (and his twin, Titus Aurelius Fulvus Antoninus)