I'm just running under the assumption that because the FAQ hasn't been released, the price point hasn't been released (or really the fact that there was a price point wasn't disclosed until the window went live), that they forgot to make a trello board or something and it won't actually go live until they figure out if it works.
It would be nice if they would have included an opening time for the reservation windows. Without that, it was reasonable to expect the system would open at midnight (12:00 AM) Pacific Time. That didn't happen, though. My next best guess (which is essentially meaningless) is it will open at noon Pacific Time since that has also been the time they open new progression servers.