- Mar 2 1st US indoor glider flight, St Louis Terminal Building
- Mar 4 Coolidge Dam in Arizona dedicated
- Mar 4 Emma Fahning bowls 1st sanctioned 300 game by a woman
- Mar 4 Terrible floods ransack Languedoc and the surrounds in south-west France, resulting in twelve departments being submerged by water and causing the death of over 700 people.
- Mar 7 Georgetown High of Chicago defeats Homer 1-0 in basketball
- Mar 7 NY Times agrees to capitalize the n in "Negro"
- Mar 9 Kurt Weill and Bertolt Brecht's satirical opera "The Rise and Fall of the City of Mahagonny" premieres in Leipzig, Germany
- Mar 11 William Taft, American 27th President & Chief Justice buried in Arlington Cemetery
Historic Event
Mar 12 Mahatma Gandhi begins his famous 200 mile (300km) protest march against the widely hated British salt tax
- Mar 12 Stanislawa Walasiewicz [Stella Walsh] sets world record for the 220-yard dash (0:26.1)
- Mar 13 Clyde Tombaugh announces discovery of Pluto at Lowell Observatory
- Mar 15 1st seaplane glider flown at Port Washington, NY
- Mar 15 1st streamlined submarine of US navy, USS Nautilus, launched
- Mar 16 USS Constitution (Old Ironsides) floated out to become a national shrine
- Mar 17 Construction begins of the Empire State Building, the world's 1st skyscraper of 100+ stories, on 5th Avenue in New York City
- Mar 18 Boston Bruins win record 20th NHL home game
- Mar 19 Nakagawa Soen accepted as a student of Katsube Keigaku Roshi
- Mar 20 Clessie Cummins sets diesel engine speed record of 129.39 kph
Historic Event
Mar 20 American fast food restaurant chain "KFC" [Kentucky Fried Chicken] is founded by Colonel Harland Sanders in North Corbin, Kentucky
- Mar 23 US Ladies Figure Skating championship won by Maribel Vinson
- Mar 23 US Mens Figure Skating championship won by Roger Turner
- Mar 24 1st religious services telecast in US (W2XBS NYC)
- Mar 26 Congress appropriates $50,000 for Inter-American highway
- Mar 27 1st US radio broadcast from a ship at sea
Music Premiere
Mar 28 1st performance of Walter Piston's Suite for orchestra (Boston)
Istanbul – The Queen of Cities
Mar 28 Turkish cities Constantinople and Angora change their names to Istanbul and Ankara
- Mar 29 Heinrich Brüning is appointed German Chancellor
- Mar 29 89h Grand National: 10-year-old 100/8 shot Shaun Goilin, ridden by jockey Tommy Cullinan, wins by a neck from Melleray's Belle
- Mar 30 Babberich-H soccer team forms
- Mar 31 The Motion Pictures Production Code is instituted, imposing strict guidelines on the treatment of sex, crime, religion and violence in film for the next 38 years