What happened 20 April in Japan

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.

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.