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

Other days

brow

Brow Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
camera

Camera Day
martini

Martini Day
bow tie

Bow Tie Day
book

Book Day
buddy

Buddy Day
gum

Gum Day
lash

Lash Day
nae nae

Nae Nae Day