Island in operation 31 December, New Year's Eve Visitor Centers and Sanssouci Palace, New Palace, Charlottenburg Palace (Old Palace & New Wing), Rheinsberg House open until 2.30 p.m (last admission 2 p [...] German Unity Palaces regularly open (except New Pavilion) additional: Steam Engine Building 15 October, works meeting all palaces closed 31 October, Reformation Day (Brandenburg holiday only) Palaces regularly [...] Christmas Eve all palaces closed Ferry Peacock Island in operation 25 December, Christmas Day all palaces closed Ferry Peacock Island in operation 26 December, Christmas Holiday Palaces regularly open Ferry