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

Other days

ask out your crush

Ask Out Your Crush Day
one

One Day
self appreciation

Self Appreciation Day
lisp

Lisp Day
ruby

Ruby Day
latina equal pay

Latina Equal Pay Day
stud

Stud Day
slime

Slime Day
law

Law Day
bonang

Bonang Day