God reveals himself in visions whether it's anight one or a day one.

that is how a person can figure out the difference between the two.

Job 33:12-318
But I tell you, in this you are not right, for God is greater than man.

Why do you complain to him that he answers none of man's words?
For God does speak - now one way, now another-though man may not perceive it.

In a dream, in a vision of the night, when deep spleep falls on men as they slumber in their beds,

He may speak in their ears and terrify them with warnings,

to turn man from wrongdoing and keep him from pride,

to preserve his soul from the pit, his life from perishing by the sword.

~Haddy~