| Year | Description | Category |
|---|---|---|
| 2017 | Chess grandmaster from Belarus, Viktor Kupreichik died. | Death day |
| 2014 | Chess grandmaster from Serbia, Dragoljub Velimirović died. | Death day |
| 2011 | American music composer Joe Brooks died. | Death day |
| 2010 | Air India Express Flight 812 aircraft incident at Mangalore, India, killed 158 people. | Man-Made Disaster |
| 2004 | Russian gymnast Mikhail Voronin died. | Death day |
| 1997 | American bacteriologist and geneticist Alfred Hershey died. | Death day |
| 1989 | Chess grandmaster from Spain, David Larino Nieto was born. | Birthday |
| 1987 | Serbian tennis player Novak Djokovic was born. | Birthday |
| 1985 | Chess grandmaster from United States, Elshan Moradi was born. | Birthday |
| 1984 | Chess grandmaster from Ukraine, Yuri Drozdovskij was born. | Birthday |
| 1983 | Belgian-American medical doctor Albert Claude died. | Death day |
| 1983 | Chinese badminton player Xie Zhongbo was born. | Birthday |
| 1982 | American skater Apolo Ohno was born. | Birthday |
| 1982 | Turkish politician Cevdet Sunay died. | Death day |
| 1972 | Chess grandmaster from Russia, Konstantin Landa was born. | Birthday |
| 1972 | British actress Margaret Rutherford died. | Death day |
| 1967 | 322 people died in L'Innovation Department Store Fire at Brussels, Belgium. | Man-Made Disaster |
| 1962 | Chess grandmaster from Brazil, Darcy Lima was born. | Birthday |
| 1962 | Chess grandmaster from Ukraine, Aleksandr Shneider was born. | Birthday |
| 1960 | Magnitude 9.4–9.6 earthquake in Valdivia, Chile. This is one of the largest earthquake by magnitude. | Natural Disaster |
| 1954 | Japanese-born American physicist Shuji Nakamura was born. | Birthday |
| 1954 | Japanese-born American electronic engineer Shuji Nakamura was born. | Birthday |
| 1946 | Irish footballer George Best was born. | Birthday |
| 1943 | Irish Humanitarian Betty Williams was born. | Birthday |
| 1936 | American engineer George H. Heilmeier was born. | Birthday |
| 1934 | American pianist Peter Nero was born. | Birthday |
| 1927 | Hungarian and American chemist George Andrew Olah was born. | Birthday |
| 1916 | American electrical engineer William C. Brown was born. | Birthday |
| 1915 | 226 people died in Quintinshill rail crash. | Man-Made Disaster |
| 1912 | English-born American chemist Herbert C. Brown was born. | Birthday |
| 1908 | Golfer from United States, Horton Smith was born. | Birthday |
| 1907 | English actor Laurence Olivier was born. | Birthday |
| 1667 | Pope Alexander VII died. | Death day |
2019-05-21