Brännbollsyran, Campus Area. Last weekend every May, Umeå changes it shape into a celebration of the upcoming summer break. Brännbollsyran is an unofficial world cup in the Swedish game of brännboll spread out all over the city. Anyone can join and over 1000 teams of 8-11 competitors so do. If you have plans to compete, IKSU Sportcentre  is the place to register your team. The final games are held on the university campus on Sunday. This Thursday-Sunday event has grown into a festival with virtually every part of the city helding some kind of event. Nordic Rock  arranges an annual Friday-Saturday hard rock music event at Hamnmagasinet in downtown during Brännbollsyran.