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

Other days

hoodie

Hoodie Day
boyfriend

Boyfriend Day
lash

Lash Day
cuddle up

Cuddle Up Day
slime

Slime Day
lisp

Lisp Day
healing

Healing Day
book

Book Day
my little pony

My Little Pony Day
eat what you want

Eat What You Want Day