Oops, it doesn't look like 'museum of the army opens on veterans day' is a national day..

Other days

Chocolate Milkshake Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Bow Tie Day

Lumpy Rug Day

Self Appreciation Day

Raise Awerness Of Zeus Day

Ask Out Your Crush Day

Brow Day

Lost Sock Memorial Day

One Day