Oops, it doesn't look like 'fuck a clown day' is a national day..

Other days

My Little Pony Day

Lisp Day

Tell Ur Crush You Like Them Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Unicorn Day

Frozen Yogurt Day

First Love Day

Chocolate Milkshake Day

Cursing Day

Pick Me Day