Basque Fiesta 2018 - Guetaria on May 26. Past days. Tuesday, May 22 Friday, May 25 Saturday, May 26 You might be also interested in: Youth Festival 2018 - Urnieta - 26 Kms. Trinity 2018 - Elgoibar - 27 Kms. Fiesta of Paternain 2018 - Paternain (Navarre) - 81 Kms. Fiesta of Lamiako 2018 - Lamiako (Biscay) - 93 Kms.