Nobody knowing the day or the hour probably doesn’t mean that nobody picked it out of a random hat. Assemble a good roomful of people picking from hats, and you’d probably find that somebody picked it.
Knowing would refer to a demonstrable certitude, which our hat date picking exercise would not amount to. And I can easily believe this, because the factors are very complex, embracing even facts that only God is privy to.
I wasn’t implying a “quick pick” option for when Christ returns; but, people picking dates.