Oops, it doesn't look like 'make a joke about waking up billie joe armstrong day' is a national day..

Other days

Ponytail Day

Reading Day

Embarrass Your Best Friend Day

Raise Awerness Of Zeus Day

Cat Girl Day

My Little Pony Day

Hiv Awareness Day

Appreciate Yaself A Lil Extra Day

Prescription Drug Take Back Day

Chocolate Milkshake Day