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

Other days

kiss a ginger

Kiss A Ginger Day
kiss a brunette

Kiss A Brunette Day
nae nae

Nae Nae Day
promposal

Promposal Day
buddy

Buddy Day
cat girl

Cat Girl Day
cuddle up

Cuddle Up Day
bow tie

Bow Tie Day
china

China Day
one

One Day