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

Other days

healing

Healing Day
brow

Brow Day
blanket fort

Blanket Fort Day
ruby

Ruby Day
lash

Lash Day
lisp

Lisp Day
first love

First Love Day
buddy

Buddy Day
donate your hair

Donate Your Hair Day
tulip

Tulip Day