
Franciade

In the French Republican calendar, the franciade was the period of four years at the end of which it was necessary to add a day to the calendar year to keep it aligned with the solar year (c. 365¼ days). 
The franciade was defined in 1793 in article 10 of the , as follows:
The period of 4 years, at the end of which this addition of one day is usually necessary, is named the franciade, in memory of the revolution which, after 4 years of toils, led France to its Republican government.
The day that was thus added at the end of the jours complémentaires was called the "jour de la révolution" (Revolution Day).
Franciade was also the name given to Saint-Denis from 1793 to 1800.