I thought it was the other way around? As you get older your perceive time as moving more quickly? As you get older every hour is a smaller percentage of your total life, so that made sense to me?
Anecdotally, I had this feeling of time moving more and more quickly, and "that thing which feels just a week ago was actually a year ago" until my early 30s, when I finally decided to unsubscribe from routines.
As I gradually moved away from having a daily schedule, I had more time for unique and memorable experiences in my everyday life, and this feeling began to change.
Nowadays, it is actualy more typical for me to feel the other way, meaning something which was just a week ago feels like it was much longer.
- boring things: usually a slow dirge or filled with brief distractions
- novel things: either no sense of time passing, or a feeling of time going anywhere from slowly to “endless”
- mundane things: time passes “at a familiar rate”, but I remember fee details later