Births on April 22

Madis Kallas, Estonian decathlete and activist

Madis Kallas (born 22 April 1981) is an Estonian decathlete and local politician, Mayor of Saaremaa Municipality.

20 Jan

Iran hostage crisis
Twenty minutes after Ronald Reagan was inaugurated, Iran releases 52 American hostages.
27 Apr

Computer mouse
Xerox PARC introduces the computer mouse.
27 Jun

Mao Zedong
The Central Committee of the Communist Party of China issues its "Resolution on Certain Questions in the History of Our Party Since the Founding of the People's Republic of China", laying the blame for the Cultural Revolution on Mao Zedong.
7 Jul

Sandra Day O'Connor
U.S. President Ronald Reagan appoints Sandra Day O'Connor to become the first female member of the Supreme Court of the United States.
15 Sep

Sandra Day O'Connor
The Senate Judiciary Committee unanimously approves Sandra Day O'Connor to become the first female justice of the Supreme Court of the United States