This Day in Ancient History: pridie idus apriles

ludi Cereri (day 1) — games in honour of the grain goddes Ceres, instituted by/before 202 B.C.
65 A.D. — death of Seneca
250 A.D. — martyrdom of Vissa (or Vissia) at Fermo
300 A.D. — martyrdom of Victor in what would become Portugal