Festivities of Cinco Olivas Activity · Cinco Olivas, Ribera Baja del Ebro, Zaragoza Image of Cinco Olivas, not of the place itself. Main festivities of Cinco Olivas in February, for San Blas, and lesser festivities in August, in the village whose main monument is the 17th-century church of Santiago. Photo: Diego Delso (CC BY-SA 4.0) What to see and do in Cinco Olivas