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If both do maybe go for Thursday as a first attempt and backup Friday if anything goes wrong by extraordinary? Otherwise if you want to book your other evening for something then Friday - there's all of next week if needed anyway.
Hi! I'm sorry, but would it be possible for us to play at 10PM my time (one hour later than scheduled) if you don't mind? I've got another possible commitment, and while I could refuse, I would rather not if that's whatever by you otherwise.