This article explores the historical significance of the April 15th public holiday celebrated in the southern Bolivian city of Tarija. The date honors the 1817 Battle of La Tablada, where local forces achieved a decisive military triumph against Spanish colonial rule. Although the event was mistakenly commemorated in May for a century, modern celebrations now span the entire month of April through a cultural festival known as "Los Abriles de Tarija." These festivities include a diverse array of activities ranging from theatrical performances and concerts to traditional livestock shows and rodeos. Ultimately, the text highlights how this specific anniversary serves as a cornerstone of regional identity and national pride for the people of Tarija.