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

Other days

believe

Believe Day
cat girl

Cat Girl Day
bounce

Bounce Day
offer

Offer Day
lash

Lash Day
boy friend

Boy Friend Day
ponytail

Ponytail Day
tulip

Tulip Day
eat what you want

Eat What You Want Day
kale

Kale Day