The only reason I remember that I’m 64 is that I will be 65 on my next birthday. That’s kind of a milestone for a number of reasons and it’s easy to remember. The same was true when I was about to turn 50. Other than that, anything after 30 is kind of blurry
I do that because I used to work in grocery stores and can noticed even small, incremental price changes on many items. Most consumers don’t do that and hardly notice 3 cents more on this and 2 ounces short on that. We are already accustomed to toilet paper and laundry detergent mega-size and “concentrated” bullshit.