" VIII began Sept. 22, 1799.
" IX " Sept. 23, 1800.
" X " " 1801.

* * * * *

" XIV " " 1805.

The new computation, though reckoned from Sept. 22, 1792, was not
introduced until Nov. 26, 1793 (An II). It ceased after Dec. 31, 1805.

The months are as follows:

Vendémiaire Sept. 22 to Oct. 21.
Brumaire Oct. 22 " Nov. 20.
Frimaire Nov. 21 " Dec. 20.
Nivôse Dec. 21 " Jan. 19.
Pluviôse Jan. 20 " Feb. 18.
Ventôse Feb. 19 " Mar. 20.
Germinal Mar. 21 " April 19.
Floréal April 20 " May 19.
Prairial May 20 " June 18.
Messidor June 19 " July 18.
Thermidor July 19 " Aug. 17.
Fructidor Aug. 18 " Sept. 16.

Add five (in leap years six) "Sansculottides" or "Jours
complémentaires."