Oops, it doesn't look like 'derek and clive day' is a national day..

Other days

stud

Stud Day
ormille

Ormille Day
cuddle up

Cuddle Up Day
buddy

Buddy Day
unicorn

Unicorn Day
pumpkin

Pumpkin Day
ponytail

Ponytail Day
lisp

Lisp Day
blanket fort

Blanket Fort Day
get funky

Get Funky Day