ante diem xvii kalendas quinctilias

Quinquatrus minusculae -- day 3 of a five-day festival honouring the birthday (maybe) of Minerva

Quando stercus delatus fas ("When the 'trash' is taken out") and the Temple of Vesta is closed to the public

302 A.D. -- martyrdom of Hesychius

303 A.D. -- martyrdom of Vitus (and companions)