There was the Perl advent calendar 2020 that was special this year since it was a "best of".
And the Twelve days of dancer 💃
I think there was no Mojolicious advent calendar this year (?!).
Except if I forgot one (please comment!) this is the list of Perl related advent calendars... But STOP! There was an hidden gem that traversed december while being relatively unnoticed.
To be honest, I discovered recently and haven't had time to read it, but I wanted to share the link 😁
The advent calendar discusses asynchronous control flow which is a very interesting but complex topic.
It's the second time he produced an advent calendar alone (see his Perl advent calendar in 2013).
I recognize the effort when it personally takes me a lot of time to write blog posts, maybe because I'm not an English native speaker, but also because it simply just takes a lot ot times to write blog posts.
This guy clearly deserves a medal.