Real detour sign in my city (Cambridge, UK) a couple of decades ago: “Paradise …. closed, follow Adam and Eve…” (Ellipses mine and I bet that the sign writer had a sense of humour).
I read a lot of comics but only one (currently) on a daily basis; I catch up on the rest in alphabetical rotation, some per day. Consequently, I rarely get caught out when the powers that be forget to update the month! but this is one of those rare times.
It’s a clarinet (clarinet-type mouthpiece, not oboe) and she puts the mouthpiece upside down into her mouth! I don’t think that’s gonna work unless she holds the instrument body up, but it certainly explains the “BWEEEEEE.”
That last panel got a vocal laugh out of me!