- Apr 1 Montreal Maroons' Clint Benedict becomes first NHL goalie to record 3 straight playoff shutouts, in a 3-0 win against the visiting Victoria Cougars in Game 2 of the Stanley Cup Championship series
- Apr 2 Riots between Muslims & Hindus in Calcutta
Historic Invention
Apr 3 Second flight of a liquid-fueled rocket by Robert Goddard
- Apr 3 Italy establishes corp of force in order to break powerful unions
- Apr 4 Greek dictator Theodoros Pangalos elected president
- Apr 6 Stanley Cup Final, Montreal Forum, Montreal, Quebec: Montreal Maroons beat Victoria Cougars (WHL), 2-0 for a 3-1 series victory
- Apr 7 Forest fire burns 900 acres & kills 2 (San Luis Obispo California)
Sports History
Apr 13 At 38, Walter Johnson pitches his 7th opening day shutout
- Apr 13 Cyclists without bicycle-tax-stamp rounded up in Amsterdam
- Apr 16 Book of the Month Club sends out its 1st selections "Lolly Willowes" & "Loving Huntsman" by Sylvia Townsend Warner
- Apr 18 Rhein Stadium opens in Dusseldorf, Germany
- Apr 19 30th Boston Marathon won by Canadian Johnny Miles in 2:25:40.4
- Apr 20 1st check sent by radio facsimile transmission across Atlantic
- Apr 22 Persia, Turkey & Afghanistan sign treaties of security
Music Premiere
Apr 25 Giacomo Puccini's opera "Turandot" premieres in Milan
- Apr 25 Persian cossack officer Reza Chan crowns himself Shah Palawi
- Apr 26 Germany & Russia sign neutrality peace treaty
- Apr 26 Karachai Autonomous Region forms in RSFSR (until 1943)
- Apr 27 In the Giants' 9-8 win over Phillies, Mel Ott, 17, 1st appearance
- Apr 29 France and US reach accord on repayment of WW I