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

Other days

Stress Awareness Day

Prescription Drug Take Back Day

Donate Your Hair Day

Ormille Day

Ponytail Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Offer Day

Tell Ur Crush You Like Them Day

Chocolate Milkshake Day

Lumpy Rug Day