Wikipedia:Selected anniversaries/March 13
- 874 - The bones of Saint Nicephorus were interred in Constantinople.
- 1639 - New College in Cambridge, Massachusetts was renamed Harvard College, after its first principal donor, John Harvard.
- 1781 - William Herschel discovered the planet Uranus.
- 1881 - Tsar Alexander II of Russia was assassinated in a Nihilist plot by Ignacy Hryniewiecki.
- 1954 - Viet Minh forces under Vo Nguyen Giap unleashed a massive artillery barrage on the French military to begin the Battle of Dien Bien Phu, the final battle in the First Indochina War.