The party is on! Jess turns 30 on this episode of New Girl.
Added:
Jess expects a surprise birthday party on New Girl. "Birthday" is the 13th episode of the show's third season.
Added:

New Girl Season 3 Episode 13 Quotes

I'm gonna bake a cake so moist, girls are gonna be like, 'Ewww, why did you say moist? I hate that word?' and I'm gonna be like, 'Taste the cake!' And they're gonna be like, 'Damn, it's moist!'"

Coach

A lot of people never graduated high school! Einstein! Bill Gates! Anne Frank! I'm gonna take back that last one.

Schmidt