Academy Awards
Mar 4 9th Academy Awards: "The Great Ziegfeld", Paul Muni & Luise Rainer wins
- Mar 7 Bucharin, Jagoda & Rykov pushed out of CPSU in USSR
Radio History
Mar 14 Battle of the Century: Fred Allen & Jack Benny meet on radio during their "feud"
- Mar 15 First American blood bank in a hospital is opened at Cook County Hospital in Chicago, Illinois
- Mar 15 1st state contraceptive clinic opens in Raleigh, North Carolina
- Mar 18 Gas explosion in school in New London, Texas: 294 die
- Mar 18 The human-powered aircraft, Pedaliante, flies 1 kilometre (0.62 miles) outside Milan.
- Mar 19 Pope Pius XI publishes encyclical Divini redemptoris against communism
- Mar 19 Astronomer Fritz Zwicky publishes his research on stellar explosion in which he coins the term "supernova" and hypothesizes that they were the origin of cosmic rays
- Mar 19 96th Grand National: With King George VI and Queen Elizabeth in attendance, aptly-named Royal Mail ridden by jockey Evan Williams wins at odds of 100/6; estimated crowd, 300,000
Battle of Interest
Mar 20 Franco offensive at Guadalajara, Spain
- Mar 20 England beats Scotland, 6-3 at Murrayfield, Edinburgh to clinch the Home Nations Rugby Championship and Triple Crown
- Mar 21 Ponce massacre, police kill 19 at Puerto Rican Nationalist parade
- Mar 23 LA Railway Co starts using PCC streetcars
- Mar 24 Bus carrying a roller skater troupe to Cincinnati from St.Louis crashes into a bridge abutment in Salem, Illinois, killing 21 people
- Mar 24 National Gallery of Art established by Congress
Sports History
Mar 26 Joe DiMaggio takes Ty Cobb's advice and replaces his 40 oz bat with a 36 oz one
