Oops, it doesn't look like 'belt your face off day' is a national day..

Other days

one

One Day
bow tie

Bow Tie Day
brow

Brow Day
pampering

Pampering Day
ruby

Ruby Day
comfy

Comfy Day
ponytail

Ponytail Day
kale

Kale Day
azonto is acceptable

Azonto Is Acceptable Day
buddy

Buddy Day