Oops, it doesn't look like 'stay in pjs day' is a national day..

Other days

gum

Gum Day
blanket fort

Blanket Fort Day
ride the wind

Ride The Wind Day
pumpkin

Pumpkin Day
frozen yogurt

Frozen Yogurt Day
get funky

Get Funky Day
first love

First Love Day
artists

Artists Day
comfy

Comfy Day
lisp

Lisp Day