| Year | Description | Category |
|---|---|---|
| 2014 | American engineer George H. Heilmeier died. | Death day |
| 1999 | Swiss gymnast Georges Miez died. | Death day |
| 1997 | Filipino politician Diosdado Macapagal died. | Death day |
| 1992 | Chess grandmaster from Russia, Nikita Matinian was born. | Birthday |
| 1989 | Chess grandmaster from China, Li Chao was born. | Birthday |
| 1988 | Chess grandmaster from India, S. Arun Prasad was born. | Birthday |
| 1975 | Brazilian politician Pascoal Ranieri Mazzilli died. | Death day |
| 1973 | Australian politician Arthur Fadden died. | Death day |
| 1971 | Chess grandmaster from Denmark, Sune Berg Hansen was born. | Birthday |
| 1965 | English physicist Edward Victor Appleton died. | Death day |
| 1965 | Chess grandmaster from Romania, Mihail Marin was born. | Birthday |
| 1962 | Astronaut from Russia, Sergei Zalyotin was born. | Birthday |
| 1953 | Chess grandmaster from Israel, Leonid Gofshtein was born. | Birthday |
| 1951 | Astronaut from Soviet Union, Aleksandr Laveykin was born. | Birthday |
| 1950 | Japanese businessman Tatsumi Kimishima was born. | Birthday |
| 1942 | New Zealand politician Geoffrey Palmer was born. | Birthday |
| 1930 | Hollywood film All Quiet on the Western Front was released in theaters. This is one of the highest grossing movies. | Release Date |
| 1930 | 322 people died in Ohio Penitentiary fire at Columbus, Ohio, United States. | Man-Made Disaster |
| 1926 | Queen of the United Kingdom, Elizabeth II was born. | Birthday |
| 1915 | Mexican-born American actor Anthony Quinn was born. | Birthday |
| 1889 | Swiss chemist Paul Karrer was born. | Birthday |
| 1889 | Mexican politician Sebastian Lerdo de Tejada died. | Death day |
| 1882 | American physicist Percy Williams Bridgman was born. | Birthday |
| 1837 | Danish writer and pacifist Fredrik Bajer was born. | Birthday |
| 1735 | Russian mechanic and inventor Ivan Kulibin was born. | Birthday |
2019-04-21