Answer:
I am mother and father, but never birth or nurse. I'm rarely still, but I never wander.
I am black when I am clean and white when I am dirty?
I have a hundred legs, but cannot stand. I have a long neck, but no head. I cannot see. I'm neat and tidy as can be.
Reaching stiffly for the sky, I bare my fingers when its cold. In warmth I wear an emerald glove and in between I dress in gold.
Known to accessorize with feathers, trumpets, and harps.
What is always coming but never arrives?