Answer:
When the day after tomorrow is yesterday. Today will be as far from Wednesday. As today was from Wednesday. When the day before yesterday was tomorrow. What is the day after this day?
Look into my face and I'm everybody. Scratch my back and I'm nobody.
I am seen in the water. If seen in the sky, I am in the rainbow, a jay's feather, and lapis lazuli.
Come up and let us go. Go down and here we stay
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?