Births on January 20

Don Mankiewicz, American author and screenwriter (d. 2015)

Don Martin Mankiewicz (January 20, 1922 – April 25, 2015) was an American screenwriter and novelist best known for his novel, Trial.

11 Jan

Diabetes mellitus
First use of insulin to treat diabetes in a human patient.
2 Feb

James Joyce
Ulysses by James Joyce is published.
13 Sep

Great Fire of Smyrna
The final act of the Greco-Turkish War, the Great Fire of Smyrna, commences.
4 Nov

Tutankhamun
In Egypt, British archaeologist Howard Carter and his men find the entrance to Tutankhamun's tomb in the Valley of the Kings.
24 Nov

Executions during the Irish Civil War
Nine Irish Republican Army members are executed by an Irish Free State firing squad. Among them is author Robert Erskine Childers, who had been arrested for illegally carrying a revolver.