I chose 1st December (Advent). Really though, I pick the nearest weekend to Advent. So it can be Fri/Sat/Sun if any of those fall on 1st December or give or take by a day if the 1st falls in the mid-week. This year will be 1st December as it falls on a Sunday.
As for post #3, I wouldn't class Die Hard as a Christmas film. This is because Christmas isn't the main theme of the film. The bulk of it is passengers trying to survive on an aeroplane that has been hijacked. The "Let It Snow" theme tune at the end is just a red herring.
Disney's Frozen, however much I like it, definitely ISN'T a Christmas film!
Christmas films to me would include: The Muppets (numerous titles), A Christmas Carol, the Snowman, some cartoon specials e.g. Garfield / Dennis the Menance / Bug's Bunny, and pretty much any films with "Santa Claus" in the title.