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

Other days

martini

Martini Day
ormille

Ormille Day
tell a fairytale

Tell A Fairytale Day
tulip

Tulip Day
pick me

Pick Me Day
blanket fort

Blanket Fort Day
cursing

Cursing Day
offer

Offer Day
polyamory

Polyamory Day
cuddle up

Cuddle Up Day