We have one day in Hamburg arriving, May 5th 2016 by ship at the Hamburg Cruise Port Hafencity. We want to rent a car and
drive to Lubec and Scherwin Castle. I understand this is the date of Ascension Day in Germany. What's our chances of finding everything closed. We have a full day, from 8:00 to 19:00.
Are you thinking about Lübeck (Luebeck)? And Schloss (castle) Schwerin?
Castle Schwerin is open from 10 am to 6 pm on Ascension day.
http://www.museum-schwerin.com
In the cities, you find stores (groceries, department stores, clothing) will be closed. Some souvenir shops might be open. Restaurants and tourist sites and museums are usually open.
Thank you, that is helpful information.