Wikipedia:Selected anniversaries/April 4
April 4: Qingming Festival in the Chinese calendar (2024); Children's Day in Taiwan
- 1660 – Charles II of England issued the Declaration of Breda, describing his conditions for the Restoration of the crown of England.
- 1721 – Robert Walpole took office as First Lord of the Treasury, Chancellor of the Exchequer and Leader of the House of Commons, becoming the first British Prime Minister, though the term "Prime Minister" was not used at the time.
- 1949 – Twelve nations signed the North Atlantic Treaty, creating NATO.
- 1968 – American civil rights leader Martin Luther King, Jr. (pictured) was assassinated on the balcony of the Lorraine Motel in Memphis, Tennessee.
- 1969 – Surgeons Denton Cooley and Domingo Liotta implanted the first total artificial heart.
- 1976 – Norodom Sihanouk abdicated from the role of leader of Cambodia and was arrested by the Khmer Rouge.