Second Labor Government
Apr 13 Australian General Election: the Commonwealth Liberal Party is defeated by the Australian Labor Party, headed by Andrew Fisher, who is able to form a majority government
- Apr 14 Pan American Union forms
Taft's First Pitch
Apr 14 US President William Howard Taft begins tradition of throwing ceremonial first pitch on Opening Day of baseball season
- Apr 15 William Howard Taft is first US President to throw out the 1st ball at a baseball game
- Apr 18 14th Boston Marathon won by Canadian Fred Cameron in 2:28:52.4
- Apr 19 Halley's comet seen by naked eye 1st time this trip (Curacao)
- Apr 20 Cleveland Naps Addie Joss 2nd no-hitter, beats Chicago, 1-0
- Apr 20 Halley's Comet passes 29th recorded perihelion at 87.9 million km
- Apr 21 Cleveland Naps play 1st game at League Park, lose to Detroit Tigers 5-0
- Apr 23 International Exhibition opens in Brussels, Belgium
- Apr 24 German Catholic youth movement Quickborn forms
- Apr 27 Belgian parliament rejects socialist motion for general voting rights
South African Party Established
Apr 27 Louis Botha and J. B. M. Hertzog establish the moderately nationalist South African Party promising equality of Britons and Boers
1st Night Flight
Apr 28 First night air flight by Claude Grahame-White takes place in England
Roosevelt Visits Amsterdam
Apr 29 Ex-US President Theodore Roosevelt visits Amsterdam
- Apr 30 Cleveland Naps Addie Joss limits St.Louis Browns to 8 hits in 2-1 victory
Admirals
Aviators
Gangsters
Generals
Industrialists
Suffragists