Answer:
I am tomorrow's yesterday and yesterday's tomorrow. What am I?
I help engines spin and pants stay up. What am I?
Lovely and round, I shine with pale light, Grown in the darkness, a ladyβs delight.
If there is a bee in my hand, what is in my eye?
I start with T end with T and within me is T.
No matter how little or how much you use me, you change me every month.