Births on December 24

Herbert Reinecker, German author and screenwriter (d. 2007)

Herbert Reinecker (24 December 1914 – 27 January 2007) was a very prolific German novelist, dramatist, screenwriter and former Nazi SS officer.

28 Jun

Assassination of Archduke Franz Ferdinand of Austria
Archduke Franz Ferdinand of Austria and his wife Sophie are assassinated in Sarajevo; this is the casus belli of World War I.
26 Jul

Bulgaria
Serbia and Bulgaria interrupt diplomatic relationship.
5 Aug

Traffic light
In Cleveland, Ohio, the first electric traffic light is installed.
15 Aug

Frank Lloyd Wright
A servant of American architect Frank Lloyd Wright murders seven people and sets fire to the living quarters of Wright's Wisconsin home, Taliesin.
1 Sep

Petrograd
St. Petersburg, Russia, changes its name to Petrograd.