
October is the tenth month of the year in the Julian and Gregorian Calendars and the sixth of seven months to have a length of 31 days. The eighth month in the old calendar of Romulus c. 750 BC, October retained its name after January and February were inserted into the calendar that had originally been created by the Romans. In Ancient Rome, one of three Mundus patet would take place on October 5, Meditrinalia October 11, Augustalia on October 12, October Horse on October 15, and Armilustrium on October 19. These dates do not correspond to the modern Gregorian calendar. Among the Anglo-Saxons, it was known as Ƿinterfylleþ, because at this full moon (fylleþ) winter was supposed to begin.

The following events occurred in October 1900:

The following events occurred in October 1901:

The following events occurred in October 1902:

The following events occurred in October 1909:

The following events occurred in October 1910:

The following events occurred in October 1911:

The following events occurred in October 1912:

The following events occurred in October 1913:
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The following events occurred in October 1920:

The following events occurred in October 1927:

The following events occurred in October 1933:

The following events occurred in October 1943:

The following events occurred in October 1946:
The following events occurred in October 1950:

The following events occurred in October 1959:

The following events occurred in October 1960:

The following events occurred in October 1961:

The following events occurred in October 1962:

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The following events occurred in October 1964:

The following events occurred in October 1965:

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The following events occurred in October 1968:

The following events occurred in October 1969:

The following events occurred in October 1970:

The following events occurred in October 1971:

The following events occurred in October 1972:

The following events occurred in October 1975:

The following events happened in October 1980:

The following events occurred in October 1981:

Brumaire 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.

Vendémiaire was the first month in the French Republican calendar. The month was named after the Occitan word vendemiaire.