Oops, it doesn't look like 'My Stomach Hurts So Bad I Ate Too Much Ice Cream day' is a national day..

Other days

Carpenters Day

Comfy Day

Nae Nae Day

Tell Ur Crush You Like Them Day

Stress Awareness Day

Singles Day

Raise Awerness Of Zeus Day

Donate Your Hair Day

Frozen Yogurt Day

Promposal Day