All events we have start in the evening and end after midnight.
But if we import something with Ical The end time defaults to 23:59.
I have followed all the recommendations of the Forum, but the end will remain constant at 23:59.
iCal Importer just got some love in our latest update. Since I see you already have (thanks for your System Information), could you please play around with your WordPress General Settings timezone and see if changing it from Europe/Amsterdam to UTC+2 and see if the iCal Importer works properly like that?