- Apr 2 1st Easter egg roll held on White House lawn
Flash! Bang! It's the Human Cannonball!
Apr 2 1st human cannonball act performed by 14-year-old Rossa Matilda Richter known as Zazel at the Royal Aquarium in London
17th British Open
Apr 6 17th British Open Men's Golf, Musselburgh Links: Jamie Anderson wins his first of 3 consecutive Championships; beats fellow Scot Bob Pringle by 2 shots
- Apr 10 Federal troops withdrawn from Columbia, SC
- Apr 12 British annex Transvaal, South Africa
- Apr 12 Catcher's mask 1st used in a baseball game
- Apr 15 World's first home telephone is installed in Somerville, Massachusetts at the house of Charles Williams Jr. [1]
- Apr 19 Opera "Les Cloches de Cornerville" is produced (Paris)
- Apr 24 Last federal occupying troops withdraw from the South (New Orleans)
- Apr 24 Russo-Turkish War, 1877-78: Russia declares war on the Ottoman Empire
Le Roi de Lahore
Apr 27 Jules Massenet's opera "Le Roi de Lahore" (The King of Lahore) premieres at the Palais Garnier, Paris, France
End of Reconstruction
Apr 27 Rutherford B. Hayes removes Federal troops from Louisiana, Reconstruction ends
Admirals
Aviators
Gangsters
Generals
Industrialists
Suffragists