- 74th Kentucky Derby: Eddie Arcaro wins aboard Citation to become first 4-time Derby winning jockey
- Glenn Taylor, Idaho Senator, arrested in Birmingham, Alabama, for trying to enter a meeting through a door marked "for Negroes"
- North Korea proclaims itself Democratic People's Republic of Korea
- Pope Pius XII publishes encyclical Auspicia quaedam
- James Wise, US soul singer (Archie Bell & the Drells)
- Christos Ladas, Greek minister of Justice, murdered