It’s still possible to register for open university studies!
Check out the courses and register at the summer university’s website. The Summer University does not charge course fees from the University of Oulu undergraduate students who have included the studies in their personal study plan.
Also, the courses organized by the Open University of Oulu are free of charge for the undergraduate students of the University of Oulu who have enrolled as present. There can be some limitations about the number of undergraduate students accepted. Check out the studies 2021 here. To be able to find courses in English, please use English course names and browse on Finnish page(Hae avoimen yliopiston opetustarjonnasta and click HAE). The actual English pages are coming up.