Dutch University HolidaysWatch
This makes sense for many international students who can acquire a bachelor's degree in 3 years as opposed to 4,thus greatly reducing expenses.
This would not be the case if the Dutch extended the holiday periods, as you seem to desire.
I will be attending either Leiden University or the University of Amsterdam starting in September 2019. Looking at both universities' 2019-2020 academic calendars, I noticed that there is about 1 week during Christmas, 2 months during the summer, and then a few separate days sprinkled throughout the year. Why do these universities have so little vacation time compared to others, and how do students deal with not having one or two 1-week breaks in spring and fall, for example?
Dutch Bachelor degrees are 3 years with 2 semesters a year containing two 8 week blocks. 7 weeks teaching and a week of exams at the end of each block. So 32 weeks of contact time. January and June are often for retakes, so there may be very little contact hours in those months.
At UvA recently, I was told that there was no teaching after the May exams. So depending on your timetable the Christmas Holiday may be extended well into January and June-Sept is the summer holiday. No Easter break apart from an extended weekend and lots of bank holidays in April/May.
This is Leiden's 2019-20 academic calendar. Count the 8 week blocks to see how the year pans out.