Time does not exist. Since what you just read is already past, that means there is no present. Since future (and past also) are according to something that does not exist, that opens a big question mark to the reality of what it was supposed to be based on.
I think it is rather our body degradation as a reaction to the sum of what we eat, what we feel, what we do, what we are and so on that makes us feel “older”. Time is perhaps a notion invented by people to coordinate better with others. Am I wrong if I say “to manipulate others”. Probably. Probably not.