I'll be giving a talk on Advent of Code at 14:00 today (UK time / UTC) at the Manchester Linux User Group. Everyone is welcome, but please check the website or DM me if you want the Jitsi details as we don't publish them widely to avoid gatecrashers.
If you can't make it, the talk won't be recorded but the slides will be online. I'm open to giving the talk elsewhere if there's demand (remote-only and sensible overlap with UTC).