With Christmas falling on a Sat. and Dec. 24 on a Friday this year, will Dec. 24 be the "official" holiday then, just as it is in the US? Should we expec that most shops & markets in Paris (& for that matter in France) will be closed around noon on Thursday, Dec. 23? We are trying to plan our itinerary during that time and want to be sure that we don't plan on doing things or shopping on the wrong day! Thank you in advance for your help!