Oops, it doesn't look like 'let me see that ass day' is a national day..

Other days

bounce

Bounce Day
self care

Self Care Day
healing

Healing Day
donate your hair

Donate Your Hair Day
cuddle up

Cuddle Up Day
youth

Youth Day
promposal

Promposal Day
lisp

Lisp Day
gum

Gum Day
polyamory

Polyamory Day