Oops, it doesn't look like 'rail company cancels all trains to and from stockholm central station for rest of day' is a national day..

Other days

Lumpy Rug Day

Donate Your Hair Day

Self Care Day

Nae Nae Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Camera Day

Ponytail Day

Youth Day

Chocolate Milkshake Day

Believe Day