ante diem xi kalendas maias

• Parilia (a.k.a. Palilia) — originally a festival in honour of Pales (who protected shepherds and their flock), it eventually evolved — in the city of Rome, at least — into a ‘birthday of Rome’ celebration

• 753 B.C. — traditional date for the foundation of Rome

• 43 B.C. — pro-Caesarian forces “under” Octavian defeat the forces of Marcus Antonius at Mutina

• 47 A.D. — Claudius celebrates the ludi Saeculares (?)

• 148 A.D. — Antoninus Pius celebrates the 900th anniversary of Rome

• 248 A.D. — Philip Arabus celebrates the 1000th anniversary of Rome