idus apriles

ludi Cereri (day 2)-- games in honour of the grain goddes Ceres, instituted by/before 202 B.C.

rites in honour of Jupiter Victor and Jupiter Liber

150 A.D. -- martyrdom of Carpus and companions at Pergamon

303 A.D. -- martyrdom of Maximus and companions at Silistria

1748 -- death of Christopher Pitt (translator of Virgil)