Oops, it doesn't look like 'Go Fuck Yourself day' is a national day..

Other days

Stress Awareness Day

Tell Ur Crush You Like Them Day

Tell A Fairytale Day

Law Day

Embarrass Your Best Friend Day

Carpenters Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Gum Day

Promposal Day

Chocolate Milkshake Day