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

Other days

stud

Stud Day
believe

Believe Day
pampering

Pampering Day
my little pony

My Little Pony Day
comfy

Comfy Day
ruby

Ruby Day
lumpy rug

Lumpy Rug Day
nail polish

Nail Polish Day
lisp

Lisp Day
bubble bath

Bubble Bath Day