Wikipedia:Selected anniversaries/January 11
- 532 - Fans of chariot racing broke into a prison and set fire to parts of Constantinople, starting the Nika riots.
- 1787 - William Herschel discovered Titania and Oberon, two moons of the planet Uranus.
- 1879 - The Anglo-Zulu War broke out.
- 1922 - Insulin was first administered to a human patient with diabetes in Toronto, Canada.
- 1964 - In a landmark report, U.S. Surgeon General Dr. Luther Terry (pictured) issued the warning that "smoking may be hazardous for one's health".
Recent days: January 10 – January 9 – January 8