Oops, it doesn't look like 'self harm in history day' is a national day..

Other days

Donate Your Hair Day

Slime Day

Kiss A Brunette Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Tell A Fairytale Day

Hiv Awareness Day

Hoodie Day

Gallery Day

Nae Nae Day

Chocolate Milkshake Day