pridie kalendas apriles

rites in honour of Luna at her temple on the Aventine

c. 130 A.D. -- martyrdom of Balbina

250 (?) A.D. -- birth of the future emperor Constantius I Chlorus

307 A.D. -- Constantine marries Fausta, the daughter of Maximian

1596 -- birth of Rene Descartes (author, of course, of that bit of Latin which a pile of folks know)