Take heart, friend, you most certainly can find registration open if you're persistent. Hundreds of users are finding it open and making new accounts each month, so it's not a matter of no one finding it.
Try checking in several times a day (not just once a day, once a week, etc.) until you find it open.
As for setting a specific time for it to open, I'm afraid this one has been suggested before, but it has been declined several times. The main reason is the fact that setting a specific time for registration to open up defeats the purpose of having it open/closed to begin with--put simply, everyone would find out, and then everybody would come in on that day to make an account (or dozens of them, depending on who it is--people do this, for some reason).
Either way, thank you for your input and suggestion. This one will remain unchanged, but persistence will pay off if you keep your eyes peeled, and check out the website whenever possible.