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

Other days

kale

Kale Day
boba

Boba Day
hot chocolate

Hot Chocolate Day
mean girls

Mean Girls Day
cuddle up

Cuddle Up Day
nail polish

Nail Polish Day
hannah

Hannah Day
lash

Lash Day
kiss a brunette

Kiss A Brunette Day
bow tie

Bow Tie Day