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)