Year 11 coins typically have a "XI" date to avoid confusion with the Roman "II".The French Revolution is usually considered to have ended with the coup of 18 Brumaire, Year VIII (9 November 1799), the coup d'état of Napoléon Bonaparte against the established constitutional regime of the Directoire.The establishment of the Republic was used as the epochal date for the calendar; therefore, the calendar commemorates the Republic, not the Revolution.
Indeed, there was initially a debate as to whether the calendar should celebrate the Great Revolution, which began in July 1789, or the Republic, which was established in 1792.(The months of September [meaning "the seventh"] through December [meaning "the tenth"] are already numeric names, although their meanings do not match their positions in either the Julian or the Gregorian calendar since the Romans changed the first month of a year from March to January.) The lengths of the months are the same; however, the 10th, 20th, and 30th are singled out of each month as the end of a décade (group of ten).Individual days were assigned, instead of to the traditional saints, to people noteworthy for mostly secular achievements; 25 December is assigned to both Jesus and Newton.), also commonly called the French Revolutionary Calendar (calendrier révolutionnaire français), was a calendar created and implemented during the French Revolution, and used by the French government for about 12 years from late 1793 to 1805, and for 18 days by the Paris Commune in 1871.The revolutionary system was designed in part to remove all religious and royalist influences from the calendar, and was part of a larger attempt at decimalisation in France (which also included decimal time of day, decimalisation of currency, and metrication).