On 20 April they took Nagyvárad (Oradea) and Nagyszalonta (Salonta). Rather than following the instructions of the Vix note, the Romanian army pressed on for the Tisza River, an easily defended natural military obstacle.
From the beginning of 1939, the war entered a new phase with the unprecedented defeat of the Japanese at Battle of Suixian–Zaoyang, then 1st Battle of Changsha, Battle of South Guangxi and Battle of Zaoyi.
On 20 April, Hitler's 56th birthday, he made his last trip to the surface. In the ruined garden of the Reich Chancellery, he awarded Iron Crosses to boy soldiers of the Hitler Youth. That afternoon, Berlin was bombarded by Soviet artillery for the first time.
On 20 April, Humberto Sorí Marin was executed at Fortaleza de la Cabaña, having been arrested on 18 March following infiltration into Cuba with 14 tons of explosives. His fellow conspirators Rogelio González Corzo (alias "Francisco Gutierrez"), Rafael Diaz Hanscom, Eufemio Fernandez, Arturo Hernandez Tellaheche and Manuel Lorenzo Puig Miyar were also executed.
Castro ordered Captain José Ramón Fernández to launch the counter-offensive, before taking personal control of it. After bombing the invaders' ships and bringing in reinforcements, Castro forced the Brigade to surrender on 20 April.
On April 20, 1973, Bufalino was arrested in a Scranton night club in an FBI raid, charged with interference with interstate commerce, obstruction of justice, gambling and transporting stolen property, but later released in $50,000 bail.
On 20 April, most students had been persuaded to leave Xinhua Gate. To disperse about 200 students that remained, police used batons; minor clashes were reported. Many students felt abused by the police, and rumours about police brutality spread quickly. This incident angered students on campus, where those who were not politically active decided to join the protests. Also on this date, a group of workers calling themselves the Beijing Workers' Autonomous Federation issued two handbills challenging the central leadership.
After her discovery, the police increased the intensity of their effort to identify suspects in this attack and took more teenagers into custody. The jogger was not identified for about 24 hours, and it took days for the police to retrace her movements of that night. By the time of the trial of the first three suspects in June 1990, The New York Times characterized the attack on the jogger as "one of the most widely publicized crimes of the 1980s".
Nintendo released the Game Boy in Japan on 21 April 1989, and in North America on 31 July 1989. Nintendo of America president Minoru Arakawa managed a deal to bundle the popular third-party game Tetris along with the Game Boy, and the pair launched as an instant success.
On April 20, 1997, at In Your House 14: Revenge of the 'Taker, he lost to Savio Vega by countout but retained the title. Audiences became increasingly hostile toward Maivia, with chants of "die, Rocky, die" and "Rocky sucks" being heard during his matches.
The Lakers won 56 games during the 1996–97 season. O'Neal averaged 26.2 points and 12.5 rebounds in his first season with Los Angeles; however, he again missed over 30 games due to injury. The Lakers made the playoffs, but were eliminated in the second round by the Utah Jazz in five games.
The Columbine High School massacre was a school shooting and bombing that occurred on April 20, 1999, at Columbine High School in Columbine, Colorado, United States. The perpetrators, twelfth grade (senior) students Eric Harris and Dylan Klebold, murdered 12 students and one teacher. Ten students were killed in the school library, where the pair subsequently committed suicide. 21 additional people were injured with gunshots and gunfire was also exchanged with the police. Another three people were injured trying to escape the school.
On April 20, Beijing's mayor and the health minister of the PRCwere replaced respectively by Wang Qishan and the former deputy health minister Gao Qiang. In the news conference chaired by Gao Qiang several hours earlier, the PRC admitted that in Beijing there were more than 300 cases, as opposed to the previous figure of only 37.
Following a security intrusion, the PlayStation Network had a temporary suspension of operation which began on April 20, 2011 and affected 77 million registered accounts. Lasting 23 days, this outage was the longest amount of time the PSN had been offline since its inception in 2006.
On 20 April, Ibrahimović sustained serious ligament damage in his right knee in a Europa League quarter-final against Anderlecht at Old Trafford.
On 20 April 2018, Ardern attended the Commonwealth Heads of Government Meeting 2018 in London, where she was selected to deliver a toast to the Commonwealth at a state banquet of world leaders. She also had her first private audience with Queen Elizabeth II.