[citation needed] Charles Gilbert Romme was born in Riom, Puy-de-Dôme, in the Auvergne region of France, where he received an education in medicine and mathematics.

[5][6] Later, in the events leading up to the Reign of Terror, he was arrested by Girondist supporters and was imprisoned in Caen for two months.

[citation needed] During his tenure in National Convention, Romme served in the Committee of Public Education [fr] (Comité de l’instruction Publique), where he presented his report on the republican calendar on 17 September 1793 and then developed an agricultural almanac based on the new calendar.

[citation needed] Because he was on an assignment to organise gun production for the navy, he had no hand in the coup of 9 Thermidor an II (27 July 1794), which resulted in the fall of the Robespierre (and ultimately led to the return of the Girondists).

[citation needed] While waiting for their trial, the defendants agreed to commit suicide in case of a death sentence.