Based on prior test date discussion boards it looks as though those scheduling emails typically go out ~2.5 weeks in advance, but curious if anyone has anything more concrete than that to share. I would love to have my time slot figured as I do have some potential conflicts on the 12th/13th... it stresses me out a little bit to have little information about when to expect the email and I'm paranoid I'll miss it/only notice it once all the most "desirable" time slots are gobbled up.
I don't even know if that's how it works.