Wikipedia:Selected anniversaries/May 30
- 1434 - Taborite forces led by Prokop the Great were decisively defeated in the Battle of Lipany, effectively ending the Hussite Wars in Bohemia.
- 1536 - Henry VIII of England married Jane Seymour (pictured), a lady-in-waiting to his first two queens consort.
- 1911 - The first Indianapolis 500 open-wheel automobile race was held at the Indianapolis Motor Speedway in Speedway, Indiana.
- 1967 - Chief Emeka Ojukwu took office as the first President of Biafra, a secessionist state in southeastern Nigeria.
- 1989 - Goddess of Democracy, a statue made mostly of polystyrene foam and papier-mâché, was erected by student protestors in Tiananmen Square, Beijing.