February 2 - A tropical storm forms just north of Cuba moving northeast. The storm makes landfall in southern Florida the next day. It is the earliest reported landfall from a tropical storm, and the earliest formation of a tropical storm on record in the Atlantic basin.
February 20 - Emmett L. Ashford becomes the first African-American umpire in organized baseball by being authorized to be a substitute umpire in the Southwestern International League.
November 25 - Agatha Christie's murder-mystery play The Mousetrap opens at the Ambassadors Theatre in London; as of 2004, it continues, next door at the St. Martin's Theatre, and remains the longest continuously running production of a play in history.
The first political advertisements appear on U.S. television. Democrats buy a 30 minute slot for their candidate, Adlai Stevenson. Stevenson is bombarded with hate mail for interfering with a broadcast of I Love Lucy. Dwight Eisenhower buys 20 second commercial spots and wins the election.
The Ernie Kovacs Show premieres. Kovacs pushes the limits of television technology with his use of camera tricks and special effects.
The first telecast of an atomic bomb detonation (KTLA)