Martin Miguel de Guemes Day is a public national holiday in Argentina observed on June 17 every year. It commemorates the death anniversary of Martin Miguel de Guemes, a military leader and popular caudillo who played a significant role in Argentina's fight for independence from Spain. The day aims to honor his heroism, courage, and contribution towards the nation's independence.

Guemes, born in Salta, established himself as a prominent and charismatic figure mobilizing local gauchos into military force to fight against the Spanish. He was appointed as the Governor of Salta, wherein his guerrilla warfare tactics were crucial in keeping royalist forces at bay, securing the Northern frontier of Argentina. His leadership was key in the ultimate victory of the Argentina War of Independence.

On this day, Argentinians across the country pay tribute to Guemes's heroic efforts through numerous public events and activities. Schools organize educational discussions about his role in the independence struggle. Also, grand military parades, traditional music concerts, and folk dances take place, particularly in Salta, his birthplace, keeping the memory of Guemes alive.