Here is my Day 1. In 2013 I was lucky enough to go to Warner Bros Studios in London and do the Harry Potter Studio Tour – it was absolutely fantastic: there were sets from the movies; costumes and props; a whole area devoted to concept art and masks; and at the end the huge model of Hogwarts that was used to do some of the filming. Unfortunately the lighting wasn’t the best for my point-and-shoot camera so some of the photos didn’t come out that well, still I will have enough for this project.
The “Harry Potter” name was from a free set I got years ago and there isn’t anything in it to say where I got it from.
The items already posted here are really good, just shows how versatile the templates are.