It's December and time for advents. For developers that means the (Advent of Code challenge.
It's an annual code challenge with 50 code challenges. There's 2 a day. Solve part one to unlock part two. You can do as many or as few as you like. You can start on any day that has been released. The puzzles aren't dependent on each other but the story continues from one puzzle to the next.
The new challenges drop at Midnight EST. There is a community to discuss and help each other. There are even threads here on DEV. You can follow the adeventofcode tag.
If this sounds fun take the challenge.