- 1641 – Sir Felim O'Neill of Kinard the leader of the Irish Rebellion issues his Proclamation of Dungannon justifying the uprising and declaring continued loyalty to Charles I.
- 1851 – William Lassell discovers the moons Umbriel, and Ariel, orbiting Uranus.
- 1901 – Annie Edson Taylor becomes the first person to go over Niagara Falls in a barrel.
Just cool!