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

My Little Pony Day

Lumpy Rug Day

Fiancee Day

Tell Ur Crush You Like Them Day

Boy Friend Day

Brow Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Special Education Day

Camera Day

First Love Day