You didn't ask for advice, but please consider journaling or writing a personal blog. I find that the time passes faster because I have fewer novel experiences as I get older. If I put a dedicated effort into remembering what was unique about my recent days, it feels like I live more of them.
Yeah I'm guessing this has to be why time feels to pass faster. When you're growing, there are so many milestones and rapid changes from ages 0 to maybe 22. Beyond that, everything is the same until you die. That's an interesting way to make it longer.
Each time period (week, year etc) is a smaller proportion of your life.
Anything that happened when I was much younger can't be resolved easily to the nearest year, unless I can identify a specific immutable event like a specific birthday.
I've found making playlists based on music releases from each year helps with this.. for me I can almost immediately remember a year or time period just by hearing a song
Quite a few tracks - does one say that anymore? - I am convinced are 1980s are actually 1990s. I'm Gen X so I should be getting that distinction right!
You can just use the songs you listened to most in a given year too. Assuming you're mainly listening to old music, my original suggestion probably won't work.