Oops, it doesn't look like 'share new song day' is a national day..

Other days

get funky

Get Funky Day
polyamory

Polyamory Day
lisp

Lisp Day
kale

Kale Day
ruby

Ruby Day
martini

Martini Day
first love

First Love Day
cat girl

Cat Girl Day
kiss a brunette

Kiss A Brunette Day
tulip

Tulip Day