National Tango Day is celebrated in Argentina on December 11 every year, commemorating the birthdays of two influential figures in the tango genre: Carlos Gardel and Julio de Caro. Tango, a partner dance that originated in the late 19th century in the Rio de la Plata region, is a blend of various cultural influences, including Native American, African, and European elements. The celebration of National Tango Day was initiated by Argentine composer Ben Molar, who proposed the idea after recognizing the shared birthday of Gardel and de Caro. The first Tango Day took place in Buenos Aires in 1977 and was later promoted to a national observance by the Argentine government. Today, tango enthusiasts around the world celebrate this day, honoring the rich cultural heritage and evolution of tango, which was recognized as an Intangible Cultural Heritage by UNESCO in 2009.