Big Week 2017 - San Sebastian from August 12 to August 19. Past days. Saturday, August 12 Sunday, August 13 Monday, August 14 Tuesday, August 15 Wednesday, August 16 Thursday, August 17 Friday, August 18 Saturday, August 19 You might be also interested in: Fiesta of Zizurkil 2017 - Zizurkil - 18 Kms. Saint Mary 2017 - Soraluze - 53 Kms. August Fiesta 2017 - Ullibarri de los Olleros (Alava) - 95 Kms.