South Africa held its first multiracial elections on April 27, 1994, marking the end of apartheid and leading Nelson Mandela to become the country's first black president.

On April 27, 1974, the United States hosted the first 'Earth Day' event, which gained significant public attention for environmental issues.

On April 27, 1969, the first human-made object, the Soviet spacecraft Luna 10, was reported to have entered orbit around the Moon.