It’s that most wonderful time of the year, January 1st, when a bunch of intellectual property becomes part of the public domain. Here are some sites talking about what’s what:

• Duke’s Public Domain page is a pleasant place to start.
• The Public Domain Review has an Advent calendar of works being freed up.
• Wikipedia has a fine “just the facts” listing of major and minor works, for countries around the world.
• BoingBoing’s article gives a good overview.
• There’s a sixth annual games jam that runs until the end of January to make games using these freed-up properties.
• And, this:

And, if you made it down this far, bonus math facts about 2025.