Thursday, May 13 is Ascension Day. As a result, Campus Hasselt and Campus Diepenbeek are closed for ALL activities from Thursday, May 13 till Sunday, May 16. So you won't be able to visit the Campus library in Diepenbeek during Ascension weekend.
Law Library Limburg, however, is only closed on Thursday, May 13. On Friday, May 14, and on Saturday, May 15 the library is open from 9 am till 5 pm.