- Mar 1 Allies occupy Ruhrgebied: killing railroad striker
- Mar 3 Time magazine publishes 1st issue featuring Joseph G. Cannon (Speaker of US House of Representatives)
- Mar 3 US Senate rejects membership of the International Court of Justice, The Hague
Vladimir Lenin
Event of Interest
Mar 7 Carlos Gardel applies for Argentine citizenship
Carlos Gardel
- Mar 9 Amsterdam taxi strike ends
- Mar 9 Elmer Rice's "Adding Machine" premieres in NYC
- Mar 9 NHL Championship: Montreal Canadiens outscore Ottawa Senators, 3-2, in 2
- Mar 13 Lee de Forest demonstrates his sound-on-film moving pictures (NYC)
- Mar 14 Allies accepts Vilnius taking East-Galicia in Poland
- Mar 14 German Supreme Court prohibits NSDAP (Nazi party)
Event of Interest
Mar 14 US President Warren G. Harding becomes 1st president to pay taxes
Warren G. Harding
- Mar 15 Vladimir Lenin suffer his 3rd stroke
- Mar 16 Hugo von Hofmannsthal's "Der Unbestechliche" premieres in Vienna
- Mar 20 Bavarian minister of interior refuses to forbid Nazi Sturm Abteilung
- Mar 20 Belgian Senate rejects Dutch University in Ghent
- Mar 21 US foreign minister Charles Hughes refuses USSR recognition
- Mar 23 Frank Silver & Irving Conn release "Yes, We Have No Bananas"
- Mar 23 82nd Grand National: Capt. Tuppy Bennett wins aboard 13-year-old 100/6 shot Sergeant Murphy; first US bred horse to win race
- Mar 25 British government grants Trans-Jordan autonomy
- Mar 30 Zeta Phi Beta Sorority formed at Howard U in 1920 incorporates
- Mar 31 First dance marathon in New York City; Alma Cummings sets record of 27 hours with 6 different partners
- Mar 31 French soldiers fire on workers at Krupp factory in Essen; 13 die
- Mar 31 Stanley Cup Final, Denman Arena, Vancouver, BC: Ottawa Senators (NHL) edge Edmonton Eskimos (WCHL), 1-0 for a 2-0 series sweep