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

Other days

lisp

Lisp Day
singles

Singles Day
cuddle up

Cuddle Up Day
boy friend

Boy Friend Day
hannah

Hannah Day
polyamory

Polyamory Day
one

One Day
slime

Slime Day
ask out your crush

Ask Out Your Crush Day
stud

Stud Day