Wikipedia:Selected anniversaries/July 16
- 622 – Beginning of the Islamic calendar.
- 1918 – Russian Revolution: Bolsheviks executed Tsar Nicholas II of Russia and his family at Ekaterinburg.
- 1945 – Manhattan Project: "Trinity", the first nuclear test explosion, was detonated near Alamogordo, New Mexico, United States. (pictured)
- 1979 – Saddam Hussein took over as President of Iraq, succeeding Ahmed Hassan al-Bakr.
- 1994 – The planet Jupiter was hit by fragments of the Shoemaker-Levy 9 comet.