You’ve probably heard of it … it starts on 1st December.
Code challenges every day for (only 12 days this year). https://www.reddit.com/r/adventofcode/comments/1ocwh04/changes_to_advent_of_code_starting_this_december/
Stretch your Delphi or C++Builder muscles … or learn a new language.
You could even use it to test AI solutions, if you haven’t dipped a toe in that ocean yet.
Or just appreciate the guy that has put this on each year for 10 years … Eric Wastl.