I think that WDW Dine phones open at 7 est. Not sure about online, but I suspect that will either crash or be very slow anyway. We are clearly insane -- but I too will be calling WDW at 6 am my time to try to get my ADRs taken care of.
The reports are inconsistent because everyone's experiences seem to be different.
The website was apparently "officially" supposed to open at 6 am EST, an hour before the phone lines. Through persistence some people have managed to get theirs in at 3 am. It seems there is no guarantee, so get the coffee on and we'll send you some pixie dust
I made my ADR's for an upcoming January trip on Sunday (the 25th). The time that I would be able to sign in and get started was unclear to me (3 or 6 am?) so I set my alarm and attempted to start at 3 am. The calendar had not yet changed to the next day so I went back to bed. I again tried to sign in at a few minutes before 6 am and kept refreshing the screen. The calendar did change at 6 am. I had read on the boards about pulling up multiple restaurant booking screens at once and that worked well for me. It saves time and definitely allows you to book faster. I would recommend confirming/saving your cart frequently as the system shut down after I had made several reservations. Good luck!
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