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

Other days

prosecco

Prosecco Day
brow

Brow Day
girl friend

Girl Friend Day
tulip

Tulip Day
lisp

Lisp Day
latina equal pay

Latina Equal Pay Day
stud

Stud Day
tell a fairytale

Tell A Fairytale Day
one

One Day
hannah

Hannah Day