I almost forgot to post this #FediPuzzles graphic for the weekend!
I'll give the answer on Sunday as I think this one's a bit tricky, might need some research time - and that's also when it's most relevant (although the connection is.. a little obscure!).
RE: https://mastodon.online/@keefmarshall/115867628291161957
Last chance! I'll be giving the solution in a few hours time... There's a couple of hints in the replies if you're stuck.