The reason the years start flying by is because you stop doing anything new. Think about why childhood felt so long, everything was a first with new places, feelings and experiences. Your brain was recording all of it because none of it was familiar yet. The older you get, settle into a routine, every week starts looking the same. Wake up, phone, work, scroll, sleep, repeat. Your brain stops giving a shit to record it because there's nothing worth remembering anymore. That's why a month can vanish and you can't recall a single day of it. The fix isn't some big life change btw, it's the super simple things. Take a different route home, go somewhere you've never been, meet new people, try something you're bad at and put yourself in unfamiliar situations. Anything that snaps you out of autopilot. The more new experiences you pack in the slower and fuller time feels. Go do something you'll actually remember.