Era
1822-1903
20
1990
17
1950
16
1970
13
1960
11
Silurian
10
Colonial period, ca. 1600-1775
9
1807-1882
8
19th century
8
Cenozoic
8
2013
7
Cretaceous
7
1980
6
Devonian
6
ca 1600-1775 (Période coloniale)
6
1732-1799
5
1600-1775
4
1735-1826
4
1767-1848
4
1775
4
1804-1864
4
18th century
4
1917-1963
4
1929-2018
4
21st century
4
Paleozoic
4
1800-1899
3
1848-1927
3
1870-1957
3
18e siècle
3
19e siècle
3
20th century
3
Cénozoïque
3
From 345 to 425 million years ago
3
Holocene
3
Precambrian
3
Revolution, 1775-1783
3
Silurien
3
Tertiary
3
(1903-1953)
2
1773-1838
2
1817-1862
2
1826-1879
2
1903 or 1904-1953
2
1904-1953
2
1908-1987
2
1915-1993
2
1981-2001
2
2000
2
2000-2099
2
more ...