Twentieth birthday

Today is my last day as a teenager.
I can't say that I spent it feeling particularly teenagerish.
I ate some jellybeans,
Worked in my garden,
Played with my little brother,
Cleaned the living room,
Sewed some doll clothes,
And made coleslaw for the first time.
But today is the last official day of the two decade long incubation period known as growing up.
Tomorrow I emerge in my full glory as an "adult,"
I won't be able to say, "what can you expect? I'm a teenager" anymore.
It's weird that a whole period of my life, one that I certainly don't feel like I'm done with, can be proclaimed DONE just like that. I don't FEEL like an adult. I feel young, and immature, and like there's still so much I need to know.