- Apr 1 Chiang Kai-shek's Nationalist army crosses the Yangtze River
- Apr 7 44-year old NY Rangers GM Lester Patrick replaces his injured goaltender in a Stanley Cup game and beats Montreal Maroons, 2-1 in OT; Rangers go on to win series, 3-2
Lazarus Laughed
Apr 9 Eugene O'Neill's play "Lazarus Laughed" premieres in Pasadena, with a masked chorus of over 100
- Apr 9 Top-Oss soccer team forms in Oss
- Apr 9 Turkey passes separation of church & state
- Apr 13 1st trans atlantic flight Europe-US (Fitzmaurice-von Hunefeld-Köhl)
- Apr 14 Maddus Airlines starts 1st regular passenger flights between SF & LA
- Apr 14 Stanley Cup Final, Montreal Forum, Montreal, Quebec: In only their 2nd season in the NHL, New York Rangers beat Montreal Maroons, 2-1 for a 3-2 series win
- Apr 15 Alioto's on Fisherman's Wharf (San Francisco) forms
- Apr 16 32nd Boston Marathon won by Clarence DeMar in 2:37:07.8; back-to-back wins for his 6th race title
- Apr 19 Japanese troops occupies Sjantung-schiereiland
- Apr 19 New York Yankees are out of 1st place for 1st time since May 1926
- Apr 19 The 125th and final fascicle of the Oxford English Dictionary is published
The Passion of Joan of Arc
Apr 21 "The Passion of Joan of Arc", directed by Carl Theodor Dreyer, starring Renée Jeanne Falconetti and Eugène Silvain, is released in Denmark
Madame Tussauds Reopens
Apr 26 Madame Tussaud's waxwork exhibition reopens in London after a fire
- Apr 28 RCA and GE install three test television sets in homes in Schenectady, New York, allowing trials of inventor E.F.W. Alexanderson's first home television receiver; a poor and unsteady 1.5 square inch picture was received from radio transmitter
- Apr 30 Cherkess Autonomous Region forms in RSFSR (until 1957)
Admirals
Aviators
Gangsters
Generals
Industrialists
Suffragists