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

Kiss A Brunette Day

Azonto Is Acceptable Day

Donate Your Hair Day

Bubble Bath Day

Stress Awareness Day

Kale Day

Brow Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Gum Day

Pumpkin Day