| Year | Description | Category |
|---|---|---|
| 2012 | Bhoja Air Flight 213 aircraft incident at Islamabad, Pakistan, killed 127 people. | Man-Made Disaster |
| 2011 | Singapore's first artificial satellite X-Sat was launched. | Launch Day |
| 2011 | American electrical engineer Hubert Schlafly died. | Death day |
| 2006 | Chess grandmaster from Germany, Wolfgang Unzicker died. | Death day |
| 2003 | German-born Australian physician Bernard Katz died. | Death day |
| 1998 | Air France Flight 422 aircraft incident at Monserrate Mtn., Bogotá, Colombia, killed 53 people. | Man-Made Disaster |
| 1991 | Chess grandmaster from Hungary, Gyula Pap was born. | Birthday |
| 1988 | Chess grandmaster from Canada, Mark Bluvshtein was born. | Birthday |
| 1982 | Chess grandmaster from India, Neelotpal Das was born. | Birthday |
| 1979 | Sumo wrestler Kainowaka was born. | Birthday |
| 1977 | Chess grandmaster from Moldova, Viorel Iordachescu was born. | Birthday |
| 1976 | Chess grandmaster from Greece, Ioannis Papaioannou was born. | Birthday |
| 1976 | Chess grandmaster from India, R. B. Ramesh was born. | Birthday |
| 1973 | Chess grandmaster from Germany, Gennadij Fish was born. | Birthday |
| 1968 | Russian skier Yelena Valbe was born. | Birthday |
| 1968 | South African Airways Flight 228 aircraft incident at Windhoek, Namibia (then South West Africa), killed 123 people. | Man-Made Disaster |
| 1967 | Globe Air (HB-ITB) aircraft incident at Nicosia, Cyprus, killed 126 people. | Man-Made Disaster |
| 1965 | Chess grandmaster from Denmark, Lars Schandorff was born. | Birthday |
| 1964 | Bulgarian politician Dimitar Ganev died. | Death day |
| 1955 | Astronaut from United States, Donald Pettit was born. | Birthday |
| 1951 | American singer and songwriter Luther Vandross was born. | Birthday |
| 1949 | American actress Jessica Lange was born. | Birthday |
| 1949 | American actress Jessica Lange was born. | Birthday |
| 1948 | Japanese politician Mitsumasa Yonai died. | Death day |
| 1946 | German politician Sabine Bergmann-Pohl was born. | Birthday |
| 1945 | Astronaut from United States, Gregory Olsen was born. | Birthday |
| 1937 | 17 people died in A cinefilm fire in an elementary school at Kilingi-Nomme, Estonia. | Man-Made Disaster |
| 1928 | Chess grandmaster from United States, Robert Byrne was born. | Birthday |
| 1927 | Swiss physicist Karl Alexander Müller was born. | Birthday |
| 1925 | Finnish inventor Eric Tigerstedt died. | Death day |
| 1920 | The opening ceremony of Games of the VII Olympiad, or 1920 Summer olympics was held in Antwerp. | |
| 1918 | Swedish physicist Kai Siegbahn was born. | Birthday |
| 1918 | German physicist Karl Ferdinand Braun died. | Death day |
| 1918 | German inventor and physicist Karl Ferdinand Braun died. | Death day |
| 1911 | Thai politician Kukrit Pramoj was born. | Birthday |
| 1899 | Golfer from United States, Leo Diegel was born. | Birthday |
| 1871 | Croatian engineer and inventor Slavoljub Eduard Penkala was born. | Birthday |
| 1855 | Japanese politician Inukai Tsuyoshi was born. | Birthday |
| 1851 | Russian chemist Aleksandr Dianin was born. | Birthday |
| 1818 | German mechanic and inventor Heinrich Gobel was born. | Birthday |
| 1786 | French engineer and inventor Marc Seguin was born. | Birthday |
2019-04-20