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

Other days

bounce

Bounce Day
tell a fairytale

Tell A Fairytale Day
kale

Kale Day
unicorn

Unicorn Day
eat what you want

Eat What You Want Day
pumpkin

Pumpkin Day
offer

Offer Day
ponytail

Ponytail Day
stud

Stud Day
bow tie

Bow Tie Day