I believe we perceive time as "accelerating" because we make fewer memories (just because the brain is less flexible). The perceptual "length" of year is actual

I believe we perceive time as "accelerating" because we make fewer memories (just because the brain is less flexible). The perceptual "length" of year is actually how many things we can remember happening in that year. I may have as many memories of what happened when I was 7 than what happened when I was 27 (despite the time difference). Evidence for this hypothesis: sit down and write down month by month everything you did in the last year (vacations, jobs, birthdays, whatever), will make the year feel fuller.