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

Other days

chocolate milkshake

Chocolate Milkshake Day
one

One Day
ruby

Ruby Day
boy friend

Boy Friend Day
my little pony

My Little Pony Day
fiancee

Fiancee Day
hannah

Hannah Day
camera

Camera Day
gum

Gum Day
lash

Lash Day