Thursday, May 26 is Ascension Day. As a result, Campus Hasselt and Campus Diepenbeek are closed for ALL activities from Thursday, May 26 till Sunday, May 29. 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 26. On Friday, May 27, and on Saturday, May 28 the library is open from 9 am till 5 pm.