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

Because when we start out we start out empty. 65 years later our glass is getting nearer to being full. You can just feel it. Somedays I don’t know how old I am. I am like 59 and then it dawns on me 69. Time just creeps up on you.