Mine was my freshman year in college. I had a craving for chocolate cake one evening. My epiphany was that I could just hop in my car and go buy one. I didn’t have to answer to or explain myself to anyone. So off I went and bought a cake! My dorm roommate seemed just as enlightened at the notion and he helped me eat it.

I’m not sure I mark this as “adulthood,” but it was a strangely significant milestone in my budding independence.