Christmas is a wonderful time of year. It's full of reunions, hot chocolate, presents, and organisational stress. Most people are bogged down with travel plans, parties, presents, gift wrapping, and the like—which is a bit of a stressor for us DMs, who are already perpetually organising something for our players.
Luckily, there's going to be a wealth of free stuff to re flavour this month, since D&D and Kobold Press both happened to have the exact same idea to give away free stuff in a TTRPG [[link]] advent calendar. My one-shots are saved! Also, less importantly, Christmas.
Over on Kobold Press, the charmingly-named has been giving adventures for [[link]] both D&D 5e and the press's own Tales of the Valiant RPG—which is 5th edition compatible anyway, more like a custom homebrew rules compendium with its own subclasses than its own system. It's giving these out on Mondays, Wednesdays, and Fridays this month.
While I can't speak to the quality of this material myself—I'm a filthy homebrewer first and foremost, even if I am tempted to run a Curse of Strahd campaign—this is a lot of stuff you're getting for basically free. Even if you're not going to run these adventures or supplements rules-as-written, you can always do what I do: Chew through them like a fiend possessed and copy-paste the monster statblocks into your hastily-cobbled-together oneshot document.