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

Other days

my little pony

My Little Pony Day
cat girl

Cat Girl Day
lumpy rug

Lumpy Rug Day
lisp

Lisp Day
believe

Believe Day
comfy

Comfy Day
first love

First Love Day
kale

Kale Day
promposal

Promposal Day
buddy

Buddy Day