"Ayer" ("Yesterday") is a 1993 song by American singer and songwriter Gloria Estefan. It was released as her third promotional single (her seventh overall), from her first Spanish album, Mi Tierra. The song reached number 5 on the Billboard Hot Latin Songs chart. The promotional single was released exclusively to Latin radio stations in the United States and Argentina. At the same time, two other promotional singles were released in important countries of Spanish language, as "Volverás" in Mexico and "Mi Tierra De Tradición" in Spain.