Virgin of the Retamosa. The Virgin of the Retamosa is transferred in a procession from the Church of San Miguel Arcangel to the chapel situated in the Dehesa de Navalcarbón, once there a romería with dancing and contests is held. 1 May: San José Obrero (St Joseph the Worker), Labor Day,(Las Matas). Bullfights and concerts are organized. 6 January: At midnight on Epiphany, night of the Three Wise Men, draftees light the bonfire they've been preparing during the day, lately this tradition is being lost for two main motives, on one hand the objective was to get together all the young men drafted for active duty (military service), nowadays as the draft has been abolished it does not make sense and on the other hand the site of the bonfire is suffering constant moves due to real estate developments, from being held at the Plaza Mayor, then at the Plaza of Spain, subsequently next to the Auditorium and finally but not last at its present location at the Montecillo. References External links Las Rozas in Google Maps City Hall of Las Rozas City Information: news, culture, transports, stores and companies... Las Rozas daily news Rozas de Madrid, las