Event of Interest
May 1 Adolf Hitler and Ernst Rohm attempt to break up socialist May Day demonstrates, inviting Nazis from as far away as Nuremberg to take part in the violence
Sports History
May 2 MLB Washington Senator Walter Johnson pitches his 100th shutout, beats Yanks 3-0
- May 3 1st nonstop north American transcontinental flight (NY-San Diego) completed
- May 4 Bloody street battles between Nazis, socialist & police in Vienna
- May 4 New York state revokes its Mullan-Gage Act Prohibition law; federal Volstead Act still in place
- May 7 Mine strike at Belgian Borinage railroad
Cricket History
May 8 England Test opening batsman Jack Hobbs scores his 100th 1st-class cricket 100 with 116 not out for Surry v Somerset at Bath
- May 11 10 HRs hit in Phillies 20-14 victory over St Louis Cardinals at the Baker Bowl in Philadelphia
- May 12 48th Preakness: Benny Marinelli aboard Vigil wins in 1:53.6
- May 13 Pulitzer prize awarded to Willa Carter for "One of Ours"
- May 15 Cooperation of Dutch Molen forms
- May 17 Fire during closing day ceremonies at Grover Cleveland School, South Carolina
49th Kentucky Derby
May 19 49th Kentucky Derby: Earl Sande wins aboard Zev for his first Derby success
- May 19 KPD (communist revolts) in German Ruhr cities occupied by Allies
- May 23 Launch of Belgium's SABENA airline: first flight from Brussels to Lympne, England
Event of Interest
May 24 Stanley Baldwin succeeds Andrew Bonar Law as British Prime Minister
- May 25 Britain recognizes Transjordan with Abdullah as its leader
- May 26 Inaugural 24 Hours of Le Mans endurance race for cars starts through public roads around Le Mans, France; inaugural winners: André Lagache and René Léonard (France) for Chenard & Walcker
- May 26 Socialist Workers Youth International forms in Hamburg
- May 28 US Attorney General says it is legal for women to wear trousers anywhere
Hansen's Nordic Premieres
May 30 Howard Hanson's 1st Symphony "Nordic" premieres
- May 30 Indianapolis 500: 1921 champion Tommy Milton becomes first multiple race winner; Howdy Wilcox drives relief for laps 103-151 as Milton's hands are bandaged due to blisters
- May 31 China & USSR exchange diplomats
- May 31 The South African Indian Congress (SAIC) forms in Durban, South Africa, with Omar Hajee Amod Jhaveri as President