ante diem vi kalendas martias

Regifugium -- a festival which didn't really happen on "February 24" but actually six days before the kalends of March, which was usually during a period of intercalation. Roman writers suggested this festival was a celebration of the expulsion of the Tarquins, although modern scholars have their doubts. Whatever the case, on this day the Rex Sacrorum would offer some sort of sacrifice in the Comitium and then run away as fast as he could ...

259 A.D. -- martyrdom of Montanus and several companions at Carthage

303 A.D. -- edict of Galerius officially promoting the persecution of Christians (?)

304 A.D. -- martyrdom of Sergius in Cappadocia

1463 -- birth of Giovanni Pico della Mirandola (usually described as a "Neoplatonist")

1999 -- death of David Daube (author of Civil Disobedience in Antiquity, among numerous other works)