- Cinco de Mayo is an annual celebration held on May 5 to celebrate Mexico's victory over the Second French Empire at the Battle of Puebla in 1862 - Also called: El DĆa de la Batalla de Puebla - Celebrations: Parades, food, music, folkloric dancing, battle reenactments - Observed by: Mexicans (especially in Puebla), Mexican Americans, and people of non-Mexican heritage - Particularly popular in southern Arizona