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

Other days

youth

Youth Day
ask out your crush

Ask Out Your Crush Day
gum

Gum Day
brow

Brow Day
pampering

Pampering Day
boyfriend

Boyfriend Day
lisp

Lisp Day
camera

Camera Day
bounce

Bounce Day
eat what you want

Eat What You Want Day