The Battle of Ayacucho is a significant holiday in Peru, commemorating a pivotal event in the country's history. This decisive military encounter took place on December 9, 1824, during the Peruvian War of Independence. The royalist forces of the Spanish Empire were met by the combined forces of the newly created Peru, with the addition of troops from Colombia, Chile, and Argentina, under the banner of the United Provinces of South America. The resulting victory effectively ended three centuries of Spanish colonial domination in South America.

Every year, celebrations are held across the nation of Peru to honor the Battle of Ayacucho. This day is a national public holiday, and government offices, schools, and businesses are generally closed. Parades, patriotic speeches, military displays, fireworks, and other public commemorations are standard fare. In particular, the city of Ayacucho, where the battle took place, sees a significant influx of visitors who come to partake in the festivities.

The Battle of Ayacucho is not just a remembrance of a past military victory, but also serves to foster national unity and a sense of identity. It highlights the courage, determination, and sacrifice of those who fought for Peru's independence, making the holiday a critical component of the country's cultural heritage. The day also provides a platform for current generations to honor their nation's history, recommitting to democratic values and principles, and to build a deeper understanding of the struggles and victories that have shaped modern Peru.