Does FP+ reservations OPEN at 12:01 am?

I know that one can make FP+ reservations up to 60 days in advance for those staying on-site and 30 days in advance if you are not. Do they become available at 12:01 am on that day or at some other time?

Starts at 7 am Eastern time. When it first started it was midnight which I preferred as a night owl!