Your brain basically stopped recording your life around age 25. Everything since then is a blur for a reason. Neuroscientists measured this so many times they named it: the reminiscence bump. Ask anyone over 60 to recall their strongest memories and almost every answer clusters between ages 15 and 25. The decade where everything was new. First job, first apartment, first real relationship. Your brain encoded each day because nothing had a template yet. After that window closes, most people enter a repetition loop. Same commute, same office, same weekend rhythm. The brain stops recording repeated experiences as distinct events. A year with 300 novel days leaves 300 memory anchors. A year with 10 leaves 10. Both took 365 days to live. Only one of them will exist when you look back. This is why people at 50 say "where did the time go." The time went into routine that felt like living but left almost nothing behind. Your remaining years are fixed. How many your brain bothers to remember is entirely up to you.