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

Other days

book

Book Day
bonang

Bonang Day
singles

Singles Day
nae nae

Nae Nae Day
my little pony

My Little Pony Day
bounce

Bounce Day
nail polish

Nail Polish Day
stud

Stud Day
gum

Gum Day
lisp

Lisp Day