Event of Interest
May 1 US President Franklin D. Roosevelt signs the Neutrality Act, banning travel on belligerent ships and imposes an arms embargo on warring nations

Franklin D. Roosevelt
Event of Interest
May 3 Margaret Mitchell wins Pulitzer Prize for "Gone With the Wind"

Margaret Mitchell
Hindenburg Disaster Ends the Age of Zeppelins
May 6 German airship Hindenburg explodes in flames at Lakehurst, New Jersey, killing 35 of the 97 on board and 1 on the ground
Read Article
Event of Interest
May 27 Carl Hubbell wins his 24th consecutive game (since July 17, 1936)

Carl Hubbell
Election of Interest
May 28 Neville Chamberlain becomes Prime Minister of the United Kingdom

Neville Chamberlain
PGA Championship
May 30 PGA Championship Men's Golf, Pittsburgh Field Club: Defending champion Denny Shute defeats Jug McSpaden in 37 holes

Denny Shute
- May 30 Memorial Day Massacre: Chicago Police Department shoot and kill 10 unarmed demonstrators during the "Little Steel Strike" in the United States
- May 30 Pitcher Carl Hubbell's 24th consecutive victory
- May 30 61,756, second largest crowd in Polo Grounds history, sees Dodgers ends Carl Hubbell's consecutive-game winning streak at 24
- May 30 42nd Men's French Championships: Henner Henkel beats Bunny Austin (6-1, 6-4, 6-3)
- May 30 42nd Women's French Championships: Hilde Sperling beats Simonne Mathieu (6-2, 6-4)
- May 31 1st quadruplets to finish college (Baylor University)
- May 31 Brooklyn Dodgers snap NY Giant Carl Hubbell's 24-game winning streak
- May 31 German warships bombard Almeria, Spain
- May 31 Indianapolis 500: Wilbur Shaw wins in 4:24:07.861 (182.789 km/h)