For the European Parliament elections in June, EU students can decide whether they want to vote in the Netherlands or in their country of origin. To vote in the Netherlands if you aren’t a citizen, you need to fill in a form (in Dutch) declaring you’re not going to participate in the elections in any other country, and deliver it to the municipality by April 23 with a copy of your ID.
If you change your mind and decide to vote in your country of origin after all, you have to cancel your registration by April 23 as well.