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

Someone once told me every new day is a smaller fraction of your life than the previous one.

When you are 2 years old, 1 year is half your life. When you are 10, it’s a tenth. When, you are 20 it’s half that.

When you look back on your life, wach new year is a smaller part of your whole experience.