| Holiday name | Holiday location | Holiday type |
|---|---|---|
| King's Day | Multiple [Show] | Public Holiday |
| State Flag Day | Moldova | Observance |
| Independence Day | Multiple [Show] | Public Holiday |
| Independence Day | Multiple [Show] | Public Holiday |
| Day of Uprising Against Occupation | Slovenia | National Holiday |
| Freedom Day | South Africa | Public Holiday |
| National Babe Ruth Day | - | Unofficial (Sports) |
| National Tell a Story Day | - | Unofficial (Education & Reading) |
| National Prime Rib Day | - | Unofficial (Food & Drinks) |
| National Devil Dog Day | - | Unofficial (Food & Drinks) |
| Take Our Daughters and Sons to Work Day | - | Unofficial (Relationships & Family, Work & Occupation) |
| National Poem In Your Pocket Day | - | Unofficial (Art & Entertainment) |
| Girls' Day - Career Information Day | Germany | Observance |
| Gathering Of Nations | - | Unofficial (Culture & History) |
Historical Events on April 27
- 1777: American Revolutionary War: The Battle of Ridgefield: A British invasion force engages and defeats Continental Army regulars and militia irregulars at Ridgefield, Connecticut.
- 1805: S Marines attack the city of Derna in Tripoli. This act would later be immortalized in the Marine Corps’ Hymn “The Shores of Tripoli.”
- 1813: At the Battle of York during the War of 1812, the capital of Upper Canada called York is captured by American forces.
- 1861: The Writ of Habeas Corpus is sucpended by United States President Abraham Lincoln.
- 1865: The New York State Senate grants Cornell University a land grant.
- 1936: The UAW (United Auto Workers) becomes a distinct organization from the American Federation of Labor.
- 1941: The city of Athens, Greece is occupied by German forces during World War II.
- 1941: The Liberation Front of the Slovene Nation is established during WWII.
- 1945: While attempting to escape the country disguised as a German soldier, Italian dictator Benito Mussolini is arrested by Italian partisans in Dongo.
Famous Birthdays on April 27
- American painter and co-inventor of Morse Code, Samuel Morse is born in 1791.
- American General and 18th President of the U.S., Ulysses S. Grant is born in 1822.
- American author and poet, Jessie Redmon Fauset is born in 1882.
- American painter and illustrator, George Petty is born in 1894.
- American physicist and author, Philip Abelson is born in 1913.
- American actor Jack Klugman is born in 1922.
- French actress Anouk Aimee is born in 1932.
- American DJ and radio celebrity, Casey Kasem is born in 1932.
- English singer and illustrator, Geoffrey Shovelton is born in 1936.
- American actress Sandy Dennis is born in 1937.
