Answer:
My days are numbered.
I am seen in the water. If seen in the sky I am in the rainbow a jay's feather and lapis lazuli.
I have a head and a tail but my eyes can never see my tail.
Sometimes dark and sometimes bright, I make my way among twinkling lights. Seas and oceans obey my call, yet mountains I cannot move at all. What am I?
I am a precious stone, as clear as a diamond. Though you can walk on water with my power, try to keep me, and I'll vanish in an hour. What am I?
What language does a billboard speak?