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

Other days

comfy

Comfy Day
ponytail

Ponytail Day
ruby

Ruby Day
lisp

Lisp Day
kiss a ginger

Kiss A Ginger Day
bow tie

Bow Tie Day
donate your hair

Donate Your Hair Day
gallery

Gallery Day
stud

Stud Day
frozen yogurt

Frozen Yogurt Day