Literature
Harry Potter and the Philosopher's Stone (1997)
J.K. Rowling
In-fiction date: 12/25/1991
On Christmas morning, 1991, Harry Potter wakes at Hogwarts to find a small pile of presents — his first proper Christmas gifts. One package contains a cloak, silvery and fluid as water, that renders him completely invisible. An unsigned note reads: 'Your father left this in my possession before he died. It is time it was returned to you. Use it well.' Harry has owned the Invisibility Cloak for less than an hour before he is in the restricted section of the library at midnight.