The Twenty-Eighth of March just so happens to mark three occasions of political life in imperial Rome:
- A.D. 37 — Roman emperor Caligula accepted the titles of the Principate, bestowed on him by the Senate.
- A.D. 193 — After assassinating the Roman Emperor Pertinax, his Praetorian Guards auctioned off the throne to Didius Julianus.
- A.D. 364 — Roman Emperor Valentinian I appointed his brother Flavius Valens co-emperor.