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

Other days

lisp

Lisp Day
my little pony

My Little Pony Day
one

One Day
kale

Kale Day
eat what you want

Eat What You Want Day
bounce

Bounce Day
book

Book Day
artists

Artists Day
singles

Singles Day
pumpkin

Pumpkin Day