Brumaire (French pronunciation: [bʁymɛʁ]) was the second month in the French Republican calendar. The month was named after the French word for fog, brume, fog occurring frequently in France at that time of the year.

Brumaire was the second month of the autumn quarter (mois d'automne). It started between 22 October and 24 October. It ended between 20 November and 22 November. It follows the Vendémiaire and precedes the Frimaire.

In political/historical usage, Brumaire can refer to the coup of 18 Brumaire in the year VIII (9 November 1799), by which General Napoleon Bonaparte overthrew the government of the Directory to replace it with the Consulate, as referenced by Karl Marx in his pamphlet, The Eighteenth Brumaire of Louis Bonaparte, in which Marx parallels Napoleon's original coup with the later 1851 Coup of his nephew, Louis-Napoleon.

3 Brumaire III
 
Primidi
Duodi
Tridi
Quartidi
Quintidi
Sextidi
Septidi
Octidi
Nonidi
Décadi
décade 4
1 Wednesday
22 October 1794
2 Thursday
23 October 1794
3 Friday
24 October 1794
4 Saturday
25 October 1794
5 Sunday
26 October 1794
6 Monday
27 October 1794
7 Tuesday
28 October 1794
8 Wednesday
29 October 1794
9 Thursday
30 October 1794
10 Friday
31 October 1794
décade 5
11 Saturday
1 November 1794
12 Sunday
2 November 1794
13 Monday
3 November 1794
14 Tuesday
4 November 1794
15 Wednesday
5 November 1794
16 Thursday
6 November 1794
17 Friday
7 November 1794
18 Saturday
8 November 1794
19 Sunday
9 November 1794
20 Monday
10 November 1794
décade 6
21 Tuesday
11 November 1794
22 Wednesday
12 November 1794
23 Thursday
13 November 1794
24 Friday
14 November 1794
25 Saturday
15 November 1794
26 Sunday
16 November 1794
27 Monday
17 November 1794
28 Tuesday
18 November 1794
29 Wednesday
19 November 1794
30 Thursday
20 November 1794
10 h
Paris
6h76m50s
Brumaire
Brumaire
16:04:49
24 h
Greenwich
Conversion between Republican and Gregorian calendar for the years I - XIV
1 Brumaire I
 
Primidi
Duodi
Tridi
Quartidi
Quintidi
Sextidi
Septidi
Octidi
Nonidi
Décadi
décade 4
1 Monday
22 October 1792
2 Tuesday
23 October 1792
3 Wednesday
24 October 1792
4 Thursday
25 October 1792
5 Friday
26 October 1792
6 Saturday
27 October 1792
7 Sunday
28 October 1792
8 Monday
29 October 1792
9 Tuesday
30 October 1792
10 Wednesday
31 October 1792
décade 5
11 Thursday
1 November 1792
12 Friday
2 November 1792
13 Saturday
3 November 1792
14 Sunday
4 November 1792
15 Monday
5 November 1792
16 Tuesday
6 November 1792
17 Wednesday
7 November 1792
18 Thursday
8 November 1792
19 Friday
9 November 1792
20 Saturday
10 November 1792
décade 6
21 Sunday
11 November 1792
22 Monday
12 November 1792
23 Tuesday
13 November 1792
24 Wednesday
14 November 1792
25 Thursday
15 November 1792
26 Friday
16 November 1792
27 Saturday
17 November 1792
28 Sunday
18 November 1792
29 Monday
19 November 1792
30 Tuesday
20 November 1792
10 h
Paris
6:70:01
Brumaire
Brumaire
16:04:49
24 h
Greenwich
2 Brumaire II
 
Primidi
Duodi
Tridi
Quartidi
Quintidi
Sextidi
Septidi
Octidi
Nonidi
Décadi
décade 4
1 Tuesday
22 October 1793
2 Wednesday
23 October 1793
3 Thursday
24 October 1793
4 Friday
25 October 1793
5 Saturday
26 October 1793
6 Sunday
27 October 1793
7 Monday
28 October 1793
8 Tuesday
29 October 1793
9 Wednesday
30 October 1793
10 Thursday
31 October 1793
décade 5
11 Friday
1 November 1793
12 Saturday
2 November 1793
13 Sunday
3 November 1793
14 Monday
4 November 1793
15 Tuesday
5 November 1793
16 Wednesday
6 November 1793
17 Thursday
7 November 1793
18 Friday
8 November 1793
19 Saturday
9 November 1793
20 Sunday
10 November 1793
décade 6
21 Monday
11 November 1793
22 Tuesday
12 November 1793
23 Wednesday
13 November 1793
24 Thursday
14 November 1793
25 Friday
15 November 1793
26 Saturday
16 November 1793
27 Sunday
17 November 1793
28 Monday
18 November 1793
29 Tuesday
19 November 1793
30 Wednesday
20 November 1793
10 h
Paris
6:70:01
Brumaire
Brumaire
16:04:49
24 h
Greenwich
3 Brumaire III
 
Primidi
Duodi
Tridi
Quartidi
Quintidi
Sextidi
Septidi
Octidi
Nonidi
Décadi
décade 4
1 Wednesday
22 October 1794
2 Thursday
23 October 1794
3 Friday
24 October 1794
4 Saturday
25 October 1794
5 Sunday
26 October 1794
6 Monday
27 October 1794
7 Tuesday
28 October 1794
8 Wednesday
29 October 1794
9 Thursday
30 October 1794
10 Friday
31 October 1794
décade 5
11 Saturday
1 November 1794
12 Sunday
2 November 1794
13 Monday
3 November 1794
14 Tuesday
4 November 1794
15 Wednesday
5 November 1794
16 Thursday
6 November 1794
17 Friday
7 November 1794
18 Saturday
8 November 1794
19 Sunday
9 November 1794
20 Monday
10 November 1794
décade 6
21 Tuesday
11 November 1794
22 Wednesday
12 November 1794
23 Thursday
13 November 1794
24 Friday
14 November 1794
25 Saturday
15 November 1794
26 Sunday
16 November 1794
27 Monday
17 November 1794
28 Tuesday
18 November 1794
29 Wednesday
19 November 1794
30 Thursday
20 November 1794
10 h
Paris
6:70:01
Brumaire
Brumaire
16:04:49
24 h
Greenwich
4 Brumaire IV
 
Primidi
Duodi
Tridi
Quartidi
Quintidi
Sextidi
Septidi
Octidi
Nonidi
Décadi
décade 4
1 Friday
23 October 1795
2 Saturday
24 October 1795
3 Sunday
25 October 1795
4 Monday
26 October 1795
5 Tuesday
27 October 1795
6 Wednesday
28 October 1795
7 Thursday
29 October 1795
8 Friday
30 October 1795
9 Saturday
31 October 1795
10 Sunday
1 November 1795
décade 5
11 Monday
2 November 1795
12 Tuesday
3 November 1795
13 Wednesday
4 November 1795
14 Thursday
5 November 1795
15 Friday
6 November 1795
16 Saturday
7 November 1795
17 Sunday
8 November 1795
18 Monday
9 November 1795
19 Tuesday
10 November 1795
20 Wednesday
11 November 1795
décade 6
21 Thursday
12 November 1795
22 Friday
13 November 1795
23 Saturday
14 November 1795
24 Sunday
15 November 1795
25 Monday
16 November 1795
26 Tuesday
17 November 1795
27 Wednesday
18 November 1795
28 Thursday
19 November 1795
29 Friday
20 November 1795
30 Saturday
21 November 1795
10 h
Paris
6:70:01
Brumaire
Brumaire
16:04:49
24 h
Greenwich
5 Brumaire V
 
Primidi
Duodi
Tridi
Quartidi
Quintidi
Sextidi
Septidi
Octidi
Nonidi
Décadi
décade 4
1 Saturday
22 October 1796
2 Sunday
23 October 1796
3 Monday
24 October 1796
4 Tuesday
25 October 1796
5 Wednesday
26 October 1796
6 Thursday
27 October 1796
7 Friday
28 October 1796
8 Saturday
29 October 1796
9 Sunday
30 October 1796
10 Monday
31 October 1796
décade 5
11 Tuesday
1 November 1796
12 Wednesday
2 November 1796
13 Thursday
3 November 1796
14 Friday
4 November 1796
15 Saturday
5 November 1796
16 Sunday
6 November 1796
17 Monday
7 November 1796
18 Tuesday
8 November 1796
19 Wednesday
9 November 1796
20 Thursday
10 November 1796
décade 6
21 Friday
11 November 1796
22 Saturday
12 November 1796
23 Sunday
13 November 1796
24 Monday
14 November 1796
25 Tuesday
15 November 1796
26 Wednesday
16 November 1796
27 Thursday
17 November 1796
28 Friday
18 November 1796
29 Saturday
19 November 1796
30 Sunday
20 November 1796
10 h
Paris
6:70:01
Brumaire
Brumaire
16:04:49
24 h
Greenwich
6 Brumaire VI
 
Primidi
Duodi
Tridi
Quartidi
Quintidi
Sextidi
Septidi
Octidi
Nonidi
Décadi
décade 4
1 Sunday
22 October 1797
2 Monday
23 October 1797
3 Tuesday
24 October 1797
4 Wednesday
25 October 1797
5 Thursday
26 October 1797
6 Friday
27 October 1797
7 Saturday
28 October 1797
8 Sunday
29 October 1797
9 Monday
30 October 1797
10 Tuesday
31 October 1797
décade 5
11 Wednesday
1 November 1797
12 Thursday
2 November 1797
13 Friday
3 November 1797
14 Saturday
4 November 1797
15 Sunday
5 November 1797
16 Monday
6 November 1797
17 Tuesday
7 November 1797
18 Wednesday
8 November 1797
19 Thursday
9 November 1797
20 Friday
10 November 1797
décade 6
21 Saturday
11 November 1797
22 Sunday
12 November 1797
23 Monday
13 November 1797
24 Tuesday
14 November 1797
25 Wednesday
15 November 1797
26 Thursday
16 November 1797
27 Friday
17 November 1797
28 Saturday
18 November 1797
29 Sunday
19 November 1797
30 Monday
20 November 1797
10 h
Paris
6:70:01
Brumaire
Brumaire
16:04:49
24 h
Greenwich
7 Brumaire VII
 
Primidi
Duodi
Tridi
Quartidi
Quintidi
Sextidi
Septidi
Octidi
Nonidi
Décadi
décade 4
1 Monday
22 October 1798
2 Tuesday
23 October 1798
3 Wednesday
24 October 1798
4 Thursday
25 October 1798
5 Friday
26 October 1798
6 Saturday
27 October 1798
7 Sunday
28 October 1798
8 Monday
29 October 1798
9 Tuesday
30 October 1798
10 Wednesday
31 October 1798
décade 5
11 Thursday
1 November 1798
12 Friday
2 November 1798
13 Saturday
3 November 1798
14 Sunday
4 November 1798
15 Monday
5 November 1798
16 Tuesday
6 November 1798
17 Wednesday
7 November 1798
18 Thursday
8 November 1798
19 Friday
9 November 1798
20 Saturday
10 November 1798
décade 6
21 Sunday
11 November 1798
22 Monday
12 November 1798
23 Tuesday
13 November 1798
24 Wednesday
14 November 1798
25 Thursday
15 November 1798
26 Friday
16 November 1798
27 Saturday
17 November 1798
28 Sunday
18 November 1798
29 Monday
19 November 1798
30 Tuesday
20 November 1798
10 h
Paris
6:70:01
Brumaire
Brumaire
16:04:49
24 h
Greenwich
8 Brumaire VIII
 
Primidi
Duodi
Tridi
Quartidi
Quintidi
Sextidi
Septidi
Octidi
Nonidi
Décadi
décade 4
1 Wednesday
23 October 1799
2 Thursday
24 October 1799
3 Friday
25 October 1799
4 Saturday
26 October 1799
5 Sunday
27 October 1799
6 Monday
28 October 1799
7 Tuesday
29 October 1799
8 Wednesday
30 October 1799
9 Thursday
31 October 1799
10 Friday
1 November 1799
décade 5
11 Saturday
2 November 1799
12 Sunday
3 November 1799
13 Monday
4 November 1799
14 Tuesday
5 November 1799
15 Wednesday
6 November 1799
16 Thursday
7 November 1799
17 Friday
8 November 1799
18 Saturday
9 November 1799
19 Sunday
10 November 1799
20 Monday
11 November 1799
décade 6
21 Tuesday
12 November 1799
22 Wednesday
13 November 1799
23 Thursday
14 November 1799
24 Friday
15 November 1799
25 Saturday
16 November 1799
26 Sunday
17 November 1799
27 Monday
18 November 1799
28 Tuesday
19 November 1799
29 Wednesday
20 November 1799
30 Thursday
21 November 1799
10 h
Paris
6:70:01
Brumaire
Brumaire
16:04:49
24 h
Greenwich
9 Brumaire IX
 
Primidi
Duodi
Tridi
Quartidi
Quintidi
Sextidi
Septidi
Octidi
Nonidi
Décadi
décade 4
1 Thursday
23 October 1800
2 Friday
24 October 1800
3 Saturday
25 October 1800
4 Sunday
26 October 1800
5 Monday
27 October 1800
6 Tuesday
28 October 1800
7 Wednesday
29 October 1800
8 Thursday
30 October 1800
9 Friday
31 October 1800
10 Saturday
1 November 1800
décade 5
11 Sunday
2 November 1800
12 Monday
3 November 1800
13 Tuesday
4 November 1800
14 Wednesday
5 November 1800
15 Thursday
6 November 1800
16 Friday
7 November 1800
17 Saturday
8 November 1800
18 Sunday
9 November 1800
19 Monday
10 November 1800
20 Tuesday
11 November 1800
décade 6
21 Wednesday
12 November 1800
22 Thursday
13 November 1800
23 Friday
14 November 1800
24 Saturday
15 November 1800
25 Sunday
16 November 1800
26 Monday
17 November 1800
27 Tuesday
18 November 1800
28 Wednesday
19 November 1800
29 Thursday
20 November 1800
30 Friday
21 November 1800
10 h
Paris
6:70:01
Brumaire
Brumaire
16:04:49
24 h
Greenwich
10 Brumaire X
 
Primidi
Duodi
Tridi
Quartidi
Quintidi
Sextidi
Septidi
Octidi
Nonidi
Décadi
décade 4
1 Friday
23 October 1801
2 Saturday
24 October 1801
3 Sunday
25 October 1801
4 Monday
26 October 1801
5 Tuesday
27 October 1801
6 Wednesday
28 October 1801
7 Thursday
29 October 1801
8 Friday
30 October 1801
9 Saturday
31 October 1801
10 Sunday
1 November 1801
décade 5
11 Monday
2 November 1801
12 Tuesday
3 November 1801
13 Wednesday
4 November 1801
14 Thursday
5 November 1801
15 Friday
6 November 1801
16 Saturday
7 November 1801
17 Sunday
8 November 1801
18 Monday
9 November 1801
19 Tuesday
10 November 1801
20 Wednesday
11 November 1801
décade 6
21 Thursday
12 November 1801
22 Friday
13 November 1801
23 Saturday
14 November 1801
24 Sunday
15 November 1801
25 Monday
16 November 1801
26 Tuesday
17 November 1801
27 Wednesday
18 November 1801
28 Thursday
19 November 1801
29 Friday
20 November 1801
30 Saturday
21 November 1801
10 h
Paris
6:70:01
Brumaire
Brumaire
16:04:49
24 h
Greenwich
11 Brumaire XI
 
Primidi
Duodi
Tridi
Quartidi
Quintidi
Sextidi
Septidi
Octidi
Nonidi
Décadi
décade 4
1 Saturday
23 October 1802
2 Sunday
24 October 1802
3 Monday
25 October 1802
4 Tuesday
26 October 1802
5 Wednesday
27 October 1802
6 Thursday
28 October 1802
7 Friday
29 October 1802
8 Saturday
30 October 1802
9 Sunday
31 October 1802
10 Monday
1 November 1802
décade 5
11 Tuesday
2 November 1802
12 Wednesday
3 November 1802
13 Thursday
4 November 1802
14 Friday
5 November 1802
15 Saturday
6 November 1802
16 Sunday
7 November 1802
17 Monday
8 November 1802
18 Tuesday
9 November 1802
19 Wednesday
10 November 1802
20 Thursday
11 November 1802
décade 6
21 Friday
12 November 1802
22 Saturday
13 November 1802
23 Sunday
14 November 1802
24 Monday
15 November 1802
25 Tuesday
16 November 1802
26 Wednesday
17 November 1802
27 Thursday
18 November 1802
28 Friday
19 November 1802
29 Saturday
20 November 1802
30 Sunday
21 November 1802
10 h
Paris
6:70:01
Brumaire
Brumaire
16:04:49
24 h
Greenwich
12 Brumaire XII
 
Primidi
Duodi
Tridi
Quartidi
Quintidi
Sextidi
Septidi
Octidi
Nonidi
Décadi
décade 4
1 Monday
24 October 1803
2 Tuesday
25 October 1803
3 Wednesday
26 October 1803
4 Thursday
27 October 1803
5 Friday
28 October 1803
6 Saturday
29 October 1803
7 Sunday
30 October 1803
8 Monday
31 October 1803
9 Tuesday
1 November 1803
10 Wednesday
2 November 1803
décade 5
11 Thursday
3 November 1803
12 Friday
4 November 1803
13 Saturday
5 November 1803
14 Sunday
6 November 1803
15 Monday
7 November 1803
16 Tuesday
8 November 1803
17 Wednesday
9 November 1803
18 Thursday
10 November 1803
19 Friday
11 November 1803
20 Saturday
12 November 1803
décade 6
21 Sunday
13 November 1803
22 Monday
14 November 1803
23 Tuesday
15 November 1803
24 Wednesday
16 November 1803
25 Thursday
17 November 1803
26 Friday
18 November 1803
27 Saturday
19 November 1803
28 Sunday
20 November 1803
29 Monday
21 November 1803
30 Tuesday
22 November 1803
10 h
Paris
6:70:01
Brumaire
Brumaire
16:04:49
24 h
Greenwich
13 Brumaire XIII
 
Primidi
Duodi
Tridi
Quartidi
Quintidi
Sextidi
Septidi
Octidi
Nonidi
Décadi
décade 4
1 Tuesday
23 October 1804
2 Wednesday
24 October 1804
3 Thursday
25 October 1804
4 Friday
26 October 1804
5 Saturday
27 October 1804
6 Sunday
28 October 1804
7 Monday
29 October 1804
8 Tuesday
30 October 1804
9 Wednesday
31 October 1804
10 Thursday
1 November 1804
décade 5
11 Friday
2 November 1804
12 Saturday
3 November 1804
13 Sunday
4 November 1804
14 Monday
5 November 1804
15 Tuesday
6 November 1804
16 Wednesday
7 November 1804
17 Thursday
8 November 1804
18 Friday
9 November 1804
19 Saturday
10 November 1804
20 Sunday
11 November 1804
décade 6
21 Monday
12 November 1804
22 Tuesday
13 November 1804
23 Wednesday
14 November 1804
24 Thursday
15 November 1804
25 Friday
16 November 1804
26 Saturday
17 November 1804
27 Sunday
18 November 1804
28 Monday
19 November 1804
29 Tuesday
20 November 1804
30 Wednesday
21 November 1804
10 h
Paris
6:70:01
Brumaire
Brumaire
16:04:49
24 h
Greenwich
14 Brumaire XIV
 
Primidi
Duodi
Tridi
Quartidi
Quintidi
Sextidi
Septidi
Octidi
Nonidi
Décadi
décade 4
1 Wednesday
23 October 1805
2 Thursday
24 October 1805
3 Friday
25 October 1805
4 Saturday
26 October 1805
5 Sunday
27 October 1805
6 Monday
28 October 1805
7 Tuesday
29 October 1805
8 Wednesday
30 October 1805
9 Thursday
31 October 1805
10 Friday
1 November 1805
décade 5
11 Saturday
2 November 1805
12 Sunday
3 November 1805
13 Monday
4 November 1805
14 Tuesday
5 November 1805
15 Wednesday
6 November 1805
16 Thursday
7 November 1805
17 Friday
8 November 1805
18 Saturday
9 November 1805
19 Sunday
10 November 1805
20 Monday
11 November 1805
décade 6
21 Tuesday
12 November 1805
22 Wednesday
13 November 1805
23 Thursday
14 November 1805
24 Friday
15 November 1805
25 Saturday
16 November 1805
26 Sunday
17 November 1805
27 Monday
18 November 1805
28 Tuesday
19 November 1805
29 Wednesday
20 November 1805
30 Thursday
21 November 1805
10 h
Paris
6:70:01
Brumaire
Brumaire
16:04:49
24 h
Greenwich

Day name table

Like all FRC months Brumaire lasted 30 days and was divided into three 10-day weeks called décades (decades). Every day had the name of an agricultural plant, except the 5th (Quintidi) and 10th day (Decadi) of every decade, which had the name of a domestic animal (Quintidi) or an agricultural tool (Decadi).

  1re Décade 2e Décade 3e Décade
Primidi 1. Pomme (Apple) 11. Salsifis (Salsify) 21. Bacchante (Wild Ginger)
Duodi 2. Céleri (Celery) 12. Macre (Water Chestnut) 22. Azerole (Crete Hawthorn)
Tridi 3. Poire (Pear) 13. Topinambour (Jerusalem Artichoke) 23. Garence (Madder)
Quartidi 4. Betterave (Beet Root) 14. Endive (Endive) 24. Orange (Orange)
Quintidi 5. Oye (Goose) 15. Dindon (Turkey) 25. Faisan (Pheasant)
Sextidi 6. Héliotrope (European Turnsole) 16. Chervi (Skirret) 26. Pistache (Pistachio)
Septidi 7. Figue (Fig) 17. Cresson (Watercress) 27. Macjonc (Sweetpea)
Octidi 8. Scorsonère (Black Salsify) 18. Dentelaire (Leadwort) 28. Coing (Quince)
Nonidi 9. Alisier (Chequer Tree) 19. Grenade (Pomegranate) 29. Cormier (Service Tree)
Decadi 10. Charrue (Plough) 20. Herse (Harrow) 30. Rouleau (Roller)

Conversion table

Table for conversion between Republican and Gregorian Calendar
for the month "Brumaire"
I II III V VI VII
123456789101112131415161718192021222324252627282930
222324252627282930311234567891011121314151617181920
October 1792 1793 1794 1796 1797 1798 November
IV VIII IX X XI XIII XIV
123456789101112131415161718192021222324252627282930
232425262728293031123456789101112131415161718192021
October 1795 1799 1800 1801 1802 1804 1805 November
XII
123456789101112131415161718192021222324252627282930
242526272829303112345678910111213141516171819202122
October 1803 November
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