Answer:
I can be short and sometimes hot. When displayed, I rarely impress.
It's in your hand though you can not feel it. Only you and time can reveal it.
What surrounds the world, yet dwells within a thimble?
What word in the English language uses all five vowels plus Y in alphabetical order, and uses each only once?
What flies forever, Rests never?
My days are numbered. What am I?