Eli5: Why, if at all, does it seem like the years go quicker as you get older?

Question

I hear a lot of people making that remark, that the years go by quicker as you get older.
For me, at least, it seems like that’s only the case if nothing much changes in my life in that year.
To me, years seem to feel like they go slower if there’s lots of new/different things happening.

In: 348

Answer 1

When you 4 years old, one year is 1/4 of your life. When you’re 24, one year is 1/6 of your life. When you’re 40 one year is 1/10th of you’re life. Years get subjectively smaller the older you get.