- Mar 3 Vuia I aircraft built by Romanian Traian Vuia tested in France
- Mar 6 Heavy storm bursts dike, flooding Vlissingen, Netherlands
- Mar 6 Nora Blatch is 1st woman elected to American Society of Civil Engineers
- Mar 7 Finnish Senate accepts universal suffrage, except for poor
- Mar 10 Europe's worst mining accident when a coal dust explosion kills 1,060 at Courrieres, France
- Mar 10 Baker Street & Waterloo Railway opens, constructed by the Underground Electric Railways Company of London. The contraction Bakerloo became the official name in July 1906.
- Mar 12 Heavy storm ravages Dutch west coast
- Mar 15 Britons Rolls, Royce & Johnson form Rolls Royce Ltd
- Mar 17 The Phi Kappa Tau Fraternity is founded at Miami University in Oxford, Ohio
- Mar 19 Ermanno Wolf-Ferrari's "Quattro Rusteghi" premieres in Munich
Event of Interest
Mar 20 George Bernard Shaw's "Captain Brassbound's Conversion" premieres in London
George Bernard Shaw
- Mar 24 "Census of the British Empire" shows Great Britain rules 1/5th of the world
- Mar 27 Founding of the Alpine Club of Canada in Winnipeg, Manitoba
- Mar 31 GB Shaw's German version of "Caesar & Cleopatra" premieres in Berlin
- Mar 31 Intercollegiate Athletic Association of the United States is founded to set rules in amateur sports; becomes the National Collegiate Athletic Association in 1910