Festivities of Mas de las Matas Activity · Mas de las Matas, Bajo Aragón, Teruel Image of Mas de las Matas, not of the place itself. Main festivities of Mas de las Matas on the fourth weekend of August, with a parade of floats the previous Friday; in September, around the 24th, the feast of the Regreso del Comendador (Return of the Commander) is also held. Photo: Rastrojo (D•ES) (CC BY-SA 4.0) What to see and do in Mas de las Matas