Answer:
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
Steals an event or even a mood. Reveals the truth or shatters it.
Both old people and owls are said to be possessing this trait
What month of the year has 28 days?
What is it that has four legs, one head, and a foot?
I can only be played on a windy day