ante diem vii kalendas maias
- Robigalia — an ancient agricultural festival designed to appease the numen Robigo/Robigus who caused mildew
- 404 B.C. — Athens surrenders to Sparta, bringing the Peloponnesian War to an end (by one reckoning)
- 68 A.D. — martyrdom of Mark the Evangelist
- 1940 — death of Wilhelm Dorpfeld (excavator of Tiryns)