I've thought about this phenomenon a good bit as I get older. My hypothesis is that the older you get periods of time take up smaller and smaller fractions of y

I've thought about this phenomenon a good bit as I get older. My hypothesis is that the older you get periods of time take up smaller and smaller fractions of your life span, and therefore seem to pass more quickly. When you are 10 years old a year is a large fraction of the total time you have been alive so it feels much longer than when you are 60 and that same year is only 1/60 of your life. edit: reading further down I see I'm not the only one who had this same idea :)