Yekatit 12 (Amharic: የካቲት ፲፪, romanized: Yekatīt 12) is a date in the Ge'ez calendar which refers to the massacre and imprisonment of Ethiopians by the Italian occupation forces following an attempted assassination of Marshal Rodolfo Graziani, Marquis of Negele, Viceroy of Italian East Africa, on February 19, 1937. Graziani had led the Italian forces to victory over the Ethiopians in the Second Italian invasion of Ethiopia and was supreme governor of Italian East Africa. This has been described as the worst massacre in Ethiopian history.