Answer:
At night I come without being fetched. By day I am lost without being stolen.
Always old, sometimes new. Never sad, sometimes blue. Never empty, sometimes full. Never pushes, always pulls.
No matter how little or how much you use me, you change me every month.
My first is in fish but no in snail. My second is in rabbit but no in tail. My third is in up but not in down. My fourth is in tiara but not in crown. My fifth is in tree you plainly see. My whole a food for you and me.
I always run but never walk, I sometimes sing but cannot talk, No head on which a hat to place, You always look me in the face.
What did the grape do when he got stepped on?