@Catherine137
This is probably not the best way, and I'm not even sure how well this would work but for the time being, you could try to add a requirement for "guests must check in on a specific day" and have a rule for all days EXCEPT Thursday. Just a suggestion to tide you through until Airbnb is able to provide better functions/options for us hosts.
FYI - The idea just came to me, probably because I've been adjusting my calendar and requirements to tailor conditions specific to myself 🙂
EDIT - Nope. You can only set one requirement for a set duration. The above suggestion will not work unless you are willing to recieve guests ONLY on Friday. Sorry for any confusion. I should have thought harder before posting. 😞