Clear conversion table that allows you to go from a Republican calendar date to a “normal” (Gregorian) date.
Republican month Approximate Gregorian period
Vendémiaire 22 September → 21 October
Brumaire 22 October → 20 November
Frimaire 21 November → 20 December
Nivôse 21 December → 19 January
Pluviôse 20 January → 18 February
Ventôse 19 February → 20 March
Germinal 21 March → 19 April
Floréal 20 April → 19 May
Prairial 20 May → 18 June
Messidor 19 June → 18 July
Thermidor 19 July → 17 August
Fructidor 18 August → 16 September
Sans-culottides 17 → 21 September (5 or 6 days)
Correspondence between years ahe republican year in the gregorian year
An I 1792-1793
An II 1793-1794
An III 1794-1795
An IV 1795-1796
An V 1796-1797
An VI 1797-1798
An VII 1798-1799
An VIII 1799-1800
An IX 1800-1801
An X 1801-1802
An XI 1802-1803
An XII 1803-1804
An XIII 1804-1805
An XIV 1805 (incomplete)
