Oops, it doesn't look like 'dialog for like a day' is a national day..

Other days

polyamory

Polyamory Day
ask out your crush

Ask Out Your Crush Day
gum

Gum Day
offer

Offer Day
pumpkin

Pumpkin Day
self care

Self Care Day
cat girl

Cat Girl Day
stud

Stud Day
buddy

Buddy Day
nae nae

Nae Nae Day