Criollo Music Day (Día de la Canción Criolla) is observed in Peru every October 31. This holiday was officially proclaimed on October 18, 1944, by President Manuel Prado y Ugarteche to celebrate the Criollo music and culture of the country. Criollo music, which originated in the early 20th century in the province of Lima, incorporates influences from European, Andean, and African music, with popular genres including marinera, Peruvian vals, and tondero. On this day, traditional Peruvian tunes resonate throughout the country, and people of various ethnic backgrounds participate in dancing to Criollo music. The term "Criollo" is associated with the syncretic culture of the Pacific coast, blending elements from Spanish, African, Native American, and Romani cultures. One notable example of Criollo music is the waltz "El plebeyo," composed by Felipe Pinglo Alva.