Since minimum death time is 5 days (120hours), and 25/10 23:00 would have been already out of the spawn window, it would spawn on 26/10. Midnight plays no role here.
Edit: But the extreme borderline times may be tricky. I cannot guarantee that if it would die 22:59:59, that it will spawn in exactly 5 days 22:59:59 since there may be a slight delay until the server processes the request.