Answer:
I am round as a bowl, deep as a tub, but all the world's water couldn't fill me up.
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.
This is needed both for courage and hardcover books.
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?
I crawl on the earth. And rise on a pillar.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?