Oops, it doesn't look like 'my dick is in flames day' is a national day..

Other days

cursing

Cursing Day
polyamory

Polyamory Day
brow

Brow Day
cuddle up

Cuddle Up Day
first love

First Love Day
slime

Slime Day
lisp

Lisp Day
ormille

Ormille Day
bow tie

Bow Tie Day
healing

Healing Day