Hours: Hour-long tours are given daily 9-5, May-Oct.; 10-4, rest of year. Ceremonial changing of the guard occurs daily at 10 a.m., June 24-Labour Day (weather permitting). Night tours depart Fri.-Sun. at 8:30 p.m., late June-late Aug. (except during Festival d’été); at 7:30 p.m., late Sept.-Nov. 1. Closed Jan. 1 and Christmas.