Answer:
A hill full, a hole full; yet you cannot catch a bowl full. What is it?
Flat as a leaf, round as a ring. Has two eyes, can't see a thing.
My first keeps time, my second spends time, my whole tells time.
What do people want the least on their hands?
I fly, yet I have no wings. I cry, yet I have no eyes. Darkness follows me. Lower light I never see.
I’m grown from darkness but shine with a pale light. Very round I am and always a lady's delight.