Timely Dreaming Time is a mental construct we devised to feel secure.
Dreams know no time.
I went backward in time and found myself in the house where I lived before I started school. I saw all the details exactly as they were, colors, wood work, cupboards, etc. Then I was in another house, older, one that I knew that I had lived in a long time ago. I saw the attic room where all the beds had been. We hear of dreamtime and nod our heads as if we know what that means.