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

Other days

get funky

Get Funky Day
martini

Martini Day
eat what you want

Eat What You Want Day
kale

Kale Day
comfy

Comfy Day
bow tie

Bow Tie Day
cat girl

Cat Girl Day
cuddle up

Cuddle Up Day
hoodie

Hoodie Day
one

One Day