[Minato's actually pretty sure by now that it's a scale more than just one or the other, and that the Dark Hour is far closer to the real world, while places like this are closer to the cognitive world.

But.

That sounds like a lot of work to explain, so... Minato just shrugs.]

A hidden hour between midnight and 12:01. Only Persona users or particular people with the potential could experience it. That's when we fought Shadows.