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

Other days

ormille

Ormille Day
nae nae

Nae Nae Day
polyamory

Polyamory Day
girl friend

Girl Friend Day
lost sock memorial

Lost Sock Memorial Day
mean girls

Mean Girls Day
cuddle up

Cuddle Up Day
hannah

Hannah Day
prosecco

Prosecco Day
lisp

Lisp Day