Does the window (online) open at 12:00 AM EST or when Member Services open for business that day? I'll be out of country and will need to coordinate accordingly!
Once you get past midnight I at 12:01 a.m., it will show you the new day list of available rooms but when you go to book it will say something went wrong you cannot do that at this time.
So you can look at midnight but you can't book until 8 a.m. Eastern Time