- Mar 1 Isabella Goodwin appointed first US woman detective, NYC
- Mar 1 U.S. Army Captain Albert Berry performs first (attached-type) parachute jump from an airplane
- Mar 5 Italian forces are the first to use airships for military purposes, using them for reconnaissance behind Turkish lines.
- Mar 5 Spanish steamer "Principe de Asturias" sinks NE of Spain, 500 die
Amundsen Reaches South Pole
Mar 7 Norwegian explorer Roald Amundsen announces his team was the first to reach the South Pole (located 14 December 1911), 34 days before British explorer Robert Falcon Scott
Venizelos Wins Election
Mar 11 Eleftherios Venizelos, leader of the Liberal Party, wins the Greek elections again.
- Mar 11 First Stanley Cup challenge game to be played in three 20-minute periods (formerly 30-minute halves), Quebec beats Moncton, 9-3 on way to series sweep
- Mar 12 Establishment of the first football club in Bulgaria - Botev Plovdiv
Girl Scouts
Mar 12 Girl Scouts begin in the US as the Girl Guides, formed by Juliette Gordon Low in Savannah
Helen Hayes Theater
Mar 12 Helen Hayes Theater (Little Theatre) opens at 240W 44th St, NYC
- Mar 13 Bulgaria and Serbia conclude an alliance pact ostensibly against Austria, but it secretly provides for a possible war against Turkey
- Mar 13 Stanley Cup, Quebec Skating Rink, Quebec City, Quebec: Quebec Bulldogs rout Moncton Victorias (NB), 8-0 for a 2-0 sweep of the challenge series
- Mar 14 King Vittorio Emanuel III of Italy injured in an assassination attempt
- Mar 17 Camp Fire Girls organization announced by Mrs Luther Halsey Gulick
- Mar 27 US First Lady Helen Herron Taft and the Viscountess Chinda, wife of the Japanese Ambassador, plant two Yoshino cherry trees on the bank of the Tidal Basin, Washington, D.C. [1]
- Mar 29 74th Grand National: Ernie Piggott wins aboard 4/1 co-favourite Jerry M at Aintree Racecourse near Liverpool, England
Scott's Last Entry
Mar 29 Captain Robert Falcon Scott, storm-bound in a tent near the South Pole, makes last entry in his diary "the end cannot be far"
- Mar 30 French protectorate in Morocco established
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