Births on May 20

Diego Abad de Santillán, Spanish economist and author (d. 1983)

Diego Abad de Santillán (1897–1937) was an anarcho-syndicalist activist and economist.

22 Jun

Chapekar brothers
British colonial officers Charles Walter Rand and Lt. Charles Egerton Ayerst are assassinated in Pune, Maharashtra, India by the Chapekar brothers and Mahadeo Vinayak Ranade, who are later caught and hanged.
26 Jul

Siege of Malakand
Anglo-Afghan War: The Pashtun fakir Saidullah leads an army of more than 10,000 to begin a siege of the British garrison in the Malakand Agency of the North West Frontier Province of India.
2 Aug

Siege of Malakand
Anglo-Afghan War: The Siege of Malakand ends when a relief column is able to reach the British garrison in the Malakand states.
31 Aug

Kinetoscope
Thomas Edison patents the Kinetoscope, the first movie projector.
12 Sep

Battle of Saragarhi
Tirah Campaign: Battle of Saragarhi.