1. Revolutionary chronology
The radical political and social changes ushered in by the French Revolution (1789) were soon also expressed in official revisions to the chronological system. At the Storming of the Bastille (July 15, 1789), the calendar began counting in Years of Liberty. On the abolition of the monarchy (September 22, 1792), it switched to Years of the French Republic, initially on the basis of the Gregorian Calendar, with the year beginn…