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

Other days

tulip

Tulip Day
boy friend

Boy Friend Day
self appreciation

Self Appreciation Day
kale

Kale Day
special education

Special Education Day
one

One Day
unicorn

Unicorn Day
prosecco

Prosecco Day
lisp

Lisp Day
gum

Gum Day