Anarchist insurrection breaks out in Zaragoza, Spain.

The anarchist insurrection of December 1933 was an attempted revolution by Spanish anarchists, in response to the victory of the right-wing in the 1933 Spanish general election. It was the third of a series of anarchist insurrections in Spain, following those in January 1932 and January 1933.

Zaragoza, traditionally known in English as Saragossa, is the capital city of the province of Zaragoza and of the autonomous community of Aragon, Spain. It lies by the Ebro river and its tributaries, the Huerva and the Gállego, roughly in the centre of both Aragon and the Ebro basin.

The Spanish Republic, commonly known as the Second Spanish Republic, was the form of democratic government in Spain from 1931 to 1939. The Republic was proclaimed on 14 April 1931 after the deposition of King Alfonso XIII. It was dissolved on 1 April 1939 after surrendering in the Spanish Civil War to the Nationalists led by General Francisco Franco.

December 8 is the 342nd day of the year in the Gregorian calendar; 23 days remain until the end of the year.