ante diem iv kalendas martias
- Equirria — the first of two days of horse racing (the second was on March 14) dedicated to Mars; the reasons are obscure, but probably have something to do with preparing horses for the upcoming campaigning season
- 116 A.D. — supplicatio pro salute Traiani (day 2)
- 1874 — birth of F.M. Cornford (author of Before and After Socrates, among several other works)