ante diem iii idus quinctilias
- ludi Apollinares (day 8)– games instituted in 212 B.C. after consulting the Sybilline books during a particularly bad stretch in the Punic Wars; four years later they became an annual festival in honour of Apollo
- 431 B.C. (?) — dedication of the Temple of Apollo outside the pomoerium (and associated rites thereafter)
- 100 B.C. (?) — birth of G. Julius Caesar (another possible day)
- ca. 251 A.D. — martydom of Myrope