Advent of Code mob session

In December, we want to try out something new.
In the spirit of Christmas, how would you like a practise session, where we take the Advent of Code challenges (https://adventofcode.com/) and try to implement them in as modern C++ as possible? That means modules, ranges, concepts, coroutines, and so on. What ever fits. This is meant to practise the new features.
We would do a mob programming session where everyone is invited to participate. This meetup will not be recorded, so there is no need to be shy. But you are also free to just watch.

Target Audience:
Everyone. Especially when you want to see some new language features in action.