San Martin's Day, or Dia de San Martin, is a significant holiday in Argentina, celebrated every year on August 17th. This holiday honors the memory of José de San Martín, one of the main liberators of Latin America from Spanish rule. San Martín is considered a national hero, and his contributions to Argentina's independence are revered by its citizens.

San Martin's Day is often characterized by cultural events and political speeches, with Argentineans taking the day to reflect on the country's history of independence. Parades featuring military and historical reenactments are common, introducing a sense of patriotism throughout the country. Public institutions and most businesses close on this day, and the nation's flag is prominently displayed in many homes and public places.

Intended to promote love for the homeland, civil responsibility, and national unity, San Martin's Day is deeply ingrained in Argentina's social fabric. In educational establishments, teachers elucidate San Martín's role in Argentine and Latin American history. At the heroic Monument to General San Martín in Buenos Aires, people lay wreaths, paying homage to the general who dared to dream of a free nation.