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

Other days

chocolate milkshake

Chocolate Milkshake Day
boy friend

Boy Friend Day
bow tie

Bow Tie Day
gum

Gum Day
one

One Day
cuddle up

Cuddle Up Day
fiancee

Fiancee Day
comfy

Comfy Day
promposal

Promposal Day
brow

Brow Day