When asked which birthday was the most memorable one (in terms of just age, not of the actual day), people often say 21 (or 20 in Japan) becasue of drinking permit or 18 because of voting and strip club priviledges or sweet 16. My most memorable b-day was when I turned 10. I remembered thinking “Oh boy..I’m 2 digits now. I will NEVER be a single digit again…”

I felt the power of aging for the first time that day.