Oops, it doesn't look like 'cathedral in washington dc illuminated in orange in honor of gun violence awareness day' is a national day..

Other days

Lash Day

Fiancee Day

Law Day

Kale Day

Camera Day

Tulip Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Kiss A Ginger Day

Hoodie Day

Chocolate Milkshake Day