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

Other days

martini

Martini Day
brow

Brow Day
ruby

Ruby Day
me

Me Day
tell a fairytale

Tell A Fairytale Day
boba

Boba Day
hannah

Hannah Day
bow tie

Bow Tie Day
believe

Believe Day
gum

Gum Day