When did you officially feel like a grownup?

I am almost 30 (gulp) and still haven’t really seemed to grasp adulthood. I often pay my bills late, let my house get trashed, and have yet to get married/have kids. I just don’t feel like a “grown up”.
When did it click for you? Does it ever? I sometimes think to myself “When did I become old enough to drive? I have my own house! I have a career! What?!?!”