February 15 - Clara, Lu & Em, generally regarded as the first daytime network soap opera, debuts in its morning time slot over the Blue Network of NBC Radio, having originally been a late evening program.
April - 10 000 disgruntled Newfoundlanders march on their legislature to show discontent with their current political situation; this was a flash point in the demise of the Dominion of Newfoundland.
April - Kreuger & Toll, the company of the "Match King" Ivar Kreuger, collapses.
April 5 - Prohibition is lifted in Finland at 10 in the morning (local time), resulting in a new mnemonic "543210".
May 29 - The first of approximately 15,000 World War I veterans arrive in Washington, D.C. demanding the immediate payment of their military bonus, becoming known as the Bonus Army.
Hedley Verity establishes a new first-class cricket record by taking all ten wickets for only ten runs against Nottinghamshire on a pitch affected by a storm.
Geneticist J. B. S. Haldane publishes The Causes of Evolution and thereby unifies the findings of Mendelian genetics with those of evolutionary science.