Wikipedia:Selected anniversaries/June 27
- 1846 - Irish potato famine: An Irish newspaper ran a story about a new potato blight.
- 1967 - The world's first automatic teller machine was installed in the London Borough of Enfield.
- 1969 - The Stonewall riots began in New York City, starting the modern gay rights movement.
- 1979 - Muhammad Ali announced his retirement from boxing.
- 1986 - The International Court of Justice ruled against the United States in Nicaragua v. United States.