Not to be outdone (much), the PDL community has made a PDL Advent calendar: https://pdl.perl.org/advent/index.html. Big up to Ea for the idea and impetus behind it.
There are a couple of episodes beyond today's (the 1st) up already, so you can binge it if you like. Or, you can keep your cool and just read one per day. I won't tell you how to best enjoy it!