Oops, it doesn't look like 'no one gives a fuck day' is a national day..

Other days

lisp

Lisp Day
eat what you want

Eat What You Want Day
tell a fairytale

Tell A Fairytale Day
boy friend

Boy Friend Day
cuddle up

Cuddle Up Day
azonto is acceptable

Azonto Is Acceptable Day
frozen yogurt

Frozen Yogurt Day
reading

Reading Day
blanket fort

Blanket Fort Day
embarrass your best friend

Embarrass Your Best Friend Day