Oops, it doesn't look like 'anna kendrick day' is a national day..

Other days

bonang

Bonang Day
kale

Kale Day
ride the wind

Ride The Wind Day
boyfriend

Boyfriend Day
boy friend

Boy Friend Day
lisp

Lisp Day
brow

Brow Day
nae nae

Nae Nae Day
kiss a brunette

Kiss A Brunette Day
lash

Lash Day