The long-running Advent of Code site just entered its 10th year, with 162,809 people completing both of its Day One puzzles (which involve a hunt for the missing historian of the North Pole). But its not the only site offering Christmas-themed programming puzzles: Hundreds of SQL lovers are trying the daily challenges from the "Advent of SQL" site. You can sign up for daily emails with webdev challenges from the Advent of JavaScript and Advent of CSS sites. The "Advent of No-Code" site challenges you to build something new every day using no-code tools like AI-powered dev environments or the social coding site Val Town. TryHackMe.com is publishing "beginner-friendly, daily gamified cyber security challenges" in an event they're calling the "Advent of Cyber." And Norway's biggest chess club (founded by world champion Magnus Carlsen) has even launched a site with daily chess puzzles called — what else? — Advent of Chess. (It promises at the end of the event someone will win a chessboard signed by Magnus Carlsen).

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