In one's lifetime, an individual embarks on many adventures, and with that comes many first milestones – we all remember our first kiss, car, or whatever else that is consequential that makes us part of the human experience.
We don’t have much choice; we are constantly reminded of them to prove who we are when signing into sensitive information, like a bank account.
Then there are rites of passage that are uniquely tied to our given profession, maybe a musician's first paying gig or a lawyer's first big win. For a sportswriter, it's getting chastised by a coach in a post-game press conference.