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

Other days

boba

Boba Day
cat girl

Cat Girl Day
gum

Gum Day
lisp

Lisp Day
donate your hair

Donate Your Hair Day
bow tie

Bow Tie Day
first love

First Love Day
carpenters

Carpenters Day
ride the wind

Ride The Wind Day
polyamory

Polyamory Day