The Day of Zamora (Spanish: Día de Zamora), also known as Jornada del Foso de Zamora ("Zamora's trench [moat] Day"), was a battle of the Spanish Reconquista that took place at the city of Zamora, Spain[1] The battle was fought between the forces of the Kingdom of Asturias under the command of Alfonso III of Asturias and the Muslim forces of Ahmed Ibn Muwaiya, an Umayyad, who was also known as Ibn al-Qitt, and by his kunya: Abul Qassim.

The battle lasted four days, finally resulting in victory for the city's Christian defenders.

The Arab chronicles of the time recounting the battle describe the amount of dead and injured as so great that it is referred to as the Jornada del Foso de Zamora, "Zamora's trench [moat] Day" or "Day of the trench [moat] of Zamora" (Not to be confused with the Battle of Alhandic 939, which bears the same nickname).

[2][3] After the victory, the chronicles describe how the Asturian defenders severed the heads of Muslim leaders, including Ibn al-Qitt, and posted them on spikes on the battlements of the city walls for all to see.

He attributes the attack to the Shia movement and says that Ibn al-Qitt was a "prophet".