Therefore a rule similar to the one used in the Gregorian Calendar (including a 4000 year rule) was to take effect in the year 20.However, the Revolutionary Calendar was abolished in the year 14, making this new rule irrelevant. The years 15 and 20 should have been leap years, after which every 4th year (except every 100th year etc. The historicity of these leap year rules has been disputed.

It is considered a turning point in the revolution; indeed, some consider it the end.

Soon after this, the Directory staged a coup to remove royalists, and their rule for the next four years would be marked by constant vote rigging to stay in power, an action at odds with the dreams of the original revolutionaries.

The French also established a new clock, in which the day was divided in ten hours of a hundred minutes of a hundred seconds - exactly 100,000 seconds per day.

The calendar was adopted more than one year after the advent of the First Republic (there was no year 1), after a long debate involving the mathematicians Romme and Monge, the poets Chénier and Fabre d’ Eglantine and the painter David.

What they don’t agree on is when the revolution came to an end.

While you can find the occasional reference to France still being in the revolutionary era now, most commentators see a difference between the revolution and the imperial rule of Napoleon Bonaparte and the age of wars that bear his name.

The Directory certainly marked the death of many revolutionary ideals.

The military had taken a large role in the changes wrought by the French Revolution before 1799 but never had a general use the army to force change.

The mathematicians contributed equal month division, and a decimal measures of time.

The poets contributed the name of the days, choosing the names of plants, domestic animals and tools; the months rhyme three by three, according to the "sonority" of the seasons.

(However, the Revolutionary Calendar was not introduced until 24 November 1793.) Leap years were introduced to keep New Year’s Day on autumnal equinox.