The tradition to celebrate the day of the saint from Madrid, co-patron of Armilla, goes back to the times of the repopulation of the town after the Christian conquest, when the place did not have more sources of wealth and occupation that the farmers and cattle dealers. The festive day begins before dawn, in the heat of dawn, with the exit of the rosary of the aurora from the church and its later route by the streets of the town. At noon there is a mass outdoors at the Prados Square. In the evening the carving of San Isidro is taken out in procession and when it finishes the popular night party begins in the fairground. The celebration concludes with fireworks in the football stadium. The program is complemented with the dispute of the Cycling Trophy San Isidro organized by the Club Joaquin Galera in collaboration with the City council.