Saint Matthew 2019 - Burgo de Osma-Ciudad de Osma - Sunday, September 22 Saturday, September 14 Friday, September 20 Saturday, September 21 Sunday, September 22↕ 12:30 Mass. 13:00 Stew. 16:00 Festive activities. 18:00 Bowling. 18:00 Chave Game. <Sat., Sep. 21 You can find out more on Fiestas.Net You might be also interested in: Fiesta of Arande de Duero 2019 - Aranda de Duero (Burgos) - 71 Kms.