April 10 – Pineapple Primary: The United States Republican Party primary elections in Chicago are preceded by violence, bombings and assassination attempts (two politicians are killed, Octavius C. Granady and Giuseppe Esposito).
April 22 – An Ms 6.0 earthquake affects southern Greece with a maximum Mercalli intensity of IX (Violent), leaving 20 dead, and destroying 3,000 homes in Corinth; a non-destructive tsunami is also observed.
April 28 – 28 inches of snow fall in southern-central Pennsylvania.
May 10 – The first regular schedule of television programming begins in Schenectady, New York, by General Electric's television station W2XB (the station is popularly known as WGY Television, after its sister radio station WGY).
August 16 – Serial killer Carl Panzram is arrested in Washington, D.C., for burglary. According to his confession, "In my lifetime I have murdered 21 human beings, I have committed thousands of burglaries, robberies, larcenies, arsons and, last but not least, I have committed sodomy on more than 1,000 male human beings. For all these things I am not in the least bit sorry."