Oops, it doesn't look like 'hope you have a good day' is a national day..

Other days

self care

Self Care Day
lisp

Lisp Day
cuddle up

Cuddle Up Day
buddy

Buddy Day
offer

Offer Day
prosecco

Prosecco Day
pampering

Pampering Day
one

One Day
fiancee

Fiancee Day
get funky

Get Funky Day