December is the season of tech advent calendars, so I'll be keeping a few notes in the post about this year's offerings.
HTML Hell Advent Calendar 2024 offers practical advice on how to construct good HTML.
Advent of Rust 2024 if chasing compiler issues on your own code wasn't bad enough try tracking them down in test code you don't have access to.
If the problems are suitably graduated then I think one might be a fun introduction to Rust but we'll have to see.