| Date | Name | Location / Topic | |
|---|---|---|---|
| World Day for Audiovisual Heritage |  | ||
| Independence Day |  | ||
| Independence Day |  | ||
| Černová Tragedy Day |  | ||
| National Black Cat Day |  | ||
| National American Beer Day |  | ||
| Navy Day |  | ||
| Ekadashi (Dashain) | |||
| National Mentoring Day |  | ||
| Cranky Co-Workers Day |  | ||
Historical Events on October 27
- 1810: The former Spanish colony that would become West Florida is annexed by the U.S.
- 1838: Missouri Executive Order 44 – also known as the Extermination Order – is issued by Missouri Governor Lilburn Boggs. This order calls for all Mormons to either flee the state or be exterminated.
- 1904: New York’s first underground subway line opens up on this day.
- 1914: During World War I, the British dreadnought battleship, the HMS Audacious, is sunk off of Tory Island when it runs into a minefield that was laid by the Germans.
- 1944: Banská Bystrica is captured by German forces during World War II.
- 1961: The 1st Saturn I rocket is tested by NASA.
- 1962: Major Rudolf Anderson of the USAF is shot down over Cuba by SA-2 surface-to-air missiles that were supplied to Cuba by the Soviet Union.
- 1988: The construction of a new United States Embassy in Moscow is suspended by Ronald Reagan due to listening devices found in the structure of the building.
- 1991: Turkmenistan become independent from the Soviet Union.
- 1994: The 1st Substellar Mass Object to be unquestionably identified – Gliese 229 B – is discovered on this day.
Famous Birthdays on October 27
- British explorer James Cook is born in 1728.
- English painter Mary Moser is born in 1744.
- American colonel, judge and politician, Juan Seguin is born in 1806.
- American lawyer and politician John Davis Long is born in 1838.
- American colonel and 26th President of the United States, Theodore Roosevelt is born in 1858.
- English painter Charles Spencelayh is born in 1865.
- American author Emily Post is born in 1872.
- American poet, novelist and short story writer, Sylvia Plath is born in 1932.
- Japanese author Ryō Hanmura is born in 1933.
- English comedian, actor and screenwriter, John Cleese is born in 1939.
- American mob boss John Gotti is born in 1940.
- American author Fran Lebowitz is born in 1950.
- English author and journalist A.N. Wilson is born in 1950.
- American author and political scientist, Francis Fukuyama is born in 1952.
- English actor Peter Firth is born in 1953.