Why is Napoleon’s coup called the “Coup de Brumaire”?

Napoleon's coup took place on November 9, which was a foggy month in the French calendar at that time, so it was called the "Brumaire Coup". Similar ones include the Thermidor Coup, Muyue Uprising, Portuguese Moon Rebellion and so on.

These names come from the calendar that was implemented for a time during the French Revolution. On October 5, 1793, the National Convention decided to abolish the Christian Gregorian calendar (ie the Gregorian calendar) and adopt the revolutionary calendar, the Christian and Christian calendar. The French and French calendar takes the date of the establishment of the First French Revolutionary War (September 22, 1792) as the epoch. Each year is divided into four seasons and 12 months, with 30 days in each month, and each 10-day period is one month. The 10th day of the tenth day is a rest day. The remaining 5 days outside the 12 months (6 days in leap years, including 1796, 1800, and 1804) are regarded as "Sans-culottes Day"...a strange name.

According to the proposal of P.N.F. Fabre Degrandin on October 24, the Japanese and Calendar borrowed the poetic names imagined by the author of a pamphlet at the time, and designated the 12 months in sequence as Portuguese Moon, fog moon, frost moon, snow moon, rain moon, wind moon, bud moon, flower moon, shepherd moon, harvest moon (or harvest moon), hot moon, fruit moon. The names of saints attached to the Gregorian calendar dates were replaced with the names of seeds, trees, flowers and fruits. The Thermidor Coup, Geyue Uprising, Muyue Uprising, Portuguese Moon Rebellion, Fruity Moon Coup, Flower Moon Coup, Coup of Brumaire and other events that occurred in the French Revolution, as well as the Muyue Decree, Fengyue Decree, etc., are based on the *** and Named after the month of the calendar. Beginning on New Year's Day in 1806, the Napoleon I regime restored the Gregorian calendar and officially abolished the Gregorian calendar. These names entered history.

***Comparison between the Chinese calendar and the Gregorian calendar

Vendemaire (Vintage) September 22nd - October 21st

Brumaire (Fog) October 22nd - November 20th

Frimaire (Frost) November 21st - December 20th

Nivose (Snow) December 21st - January 19th

Pluviose (Rain) January 20-February 18

Vendose (Wind) February 19-March 20

Floreal (Flowers) April 20-May 19

Prairial ( Meadows) May 20-June 18

Messidor (Harvest) June 19-July 18

Thermidor (Heat) July 19 -August 17th

Fructidor (Fruit) August 18th-September 21st