Answer:
I am the noise Santa's reindeers make
Sometimes I fly as fast as the speed of light. Sometime I crawl as slow as a snail. Unknown until I am measured but you will certainly miss me when Iām gone.
You will always find me in the past. I can be created in the present, but the future can never taint me. What am I?
I am there when you sit, but gone when you stand. What am I?
I am two-faced but bear only one. I have no legs but travel widely. Men spill much blood over me. Kings leave their imprint on me. What am I?
The answer I give is yes, but what I mean is no. What was the question?