The Day France Became a Republic: September 22, 1792
On September 22, 1792, France's National Convention proclaimed the First French Republic — ending a thousand years of monarchy and declaring that day Year I of a new calendar.
On the morning of September 22, 1792, the people of France woke up in a country that no longer had a king. The day before, their newly elected National Convention had voted unanimously to abolish the monarchy. On this day, the deputies decreed that all official acts would henceforth be dated from the first year of the French Republic — making September 22, 1792, Year I, Day One.
The road to that morning had been bloody. Six weeks earlier, on August 10, a Parisian mob had stormed the Tuileries Palace, toppling the constitutional monarchy that had ruled since 1791. King Louis XVI and his family were locked in the Temple prison. In the first week of September, panic over invading foreign armies set off the September Massacres, in which mobs killed more than a thousand prisoners in Paris.
Amid the chaos, France held elections for a new assembly — the National Convention, the first French legislature chosen by universal male suffrage. It met on September 20 and began work the next day. The monarchy's abolition passed by acclamation. On September 22 the deputies took the next step: the Republic would date its acts from that day, and they added, three days later, that the French Republic was "one and indivisible."
The timing felt like destiny. On September 20, a ragtag French army had faced professional Prussian forces at Valmy — and held. News of the victory reached Paris on September 22, the very day the Republic was proclaimed; the Prussians withdrew and the invasion collapsed. A nation that had just declared itself a republic seemed to have history's endorsement.
The new calendar made the break with the past literal. A committee led by Gilbert Romme, with the mathematicians Gaspard Monge and Joseph-Louis Lagrange and the poet Fabre d'Églantine, designed a calendar scrubbed of saints and kings: twelve months of thirty days with new names like Vendémiaire and Brumaire. Adopted in October 1793 and applied retroactively, it made September 22, 1792 — the autumnal equinox — 1 Vendémiaire, Year I. France would use it until Napoleon scrapped it in 1805.
The First Republic's own life was stormy and short. Louis XVI was tried that winter and guillotined on January 21, 1793. War with Europe, the Reign of Terror, the Directory, the Consulate — the Republic endured a dozen years of upheaval before Napoleon Bonaparte crowned himself emperor in 1804.
But the idea outlived the regime. On September 22, 1792, a monarchy nearly a thousand years old was replaced by a state founded on the claim that sovereignty belongs to the people. Every French republic since, and the revolutionary movements the first one inspired across two centuries, traces back to that September day when France decided it no longer needed a king.
Photo: Eugène Delacroix, public domain (via Wikimedia Commons).
