On This Day: June 18 Was a Dies Comitialis
June 18 on the Roman calendar: The city’s official noticeboard reads dies comitialis—Rome’s voice is open for business and for battle, by debate.

Unknown — "Silver denarius of Postumius Albinus" (ca. 96 BCE), public domain
The Forum buzzes with voices.
June 18 wasn’t just another day in Rome. The calendar read dies comitialis—days when the city’s business shifted from temples and courts to the open-air assemblies. Every citizen could speak, vote, and help write law.
Business, debate, and danger.
Laws could be overturned, magistrates recalled, and the direction of the Republic changed in a few hours. These days were prized by the people—and dreaded by those in power—because anything could happen.
On a dies comitialis, Romans could vote, pass laws, and challenge leaders openly. For one day, ordinary citizens tipped the balance of power.