ante diem xvi kalendas maias

• ludi Cereri (day 5)

• 43 B.C. — Octavian (the future emperor Augustus) is hailed as Imperator for the first time

• 69 A.D. — suicide of the emperor wannabe Otho (this might have occured on April 17)

• 304 A.D. — martyrs of Saragossa

• 1928 — death of Jane Ellen Harrison (Prolegomena to the Study of Greek Religion among others)