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

Other days

pampering

Pampering Day
girl friend

Girl Friend Day
brow

Brow Day
comfy

Comfy Day
believe

Believe Day
boy friend

Boy Friend Day
singles

Singles Day
cuddle up

Cuddle Up Day
kale

Kale Day
hoodie

Hoodie Day