I'm 40 and it's been getting faster consistently since my mid-20s or so.

I'd say a year now feels about as long as 3 months did c. 10 years old. Summer rolls around and I blink and it's already getting too cold for the beach again.

People come up with various reasons for it, with a popular explanation being novelty or something, but I've had a bunch of very novel years and it never seemed to make a difference. It's just a little faster every year.

Kinda depressing to think that, by subjective perception of time, I'm likely already in the last 20% or so of my life.