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

Other days

ormille

Ormille Day
gum

Gum Day
kale

Kale Day
tulip

Tulip Day
china

China Day
tell a fairytale

Tell A Fairytale Day
lisp

Lisp Day
hoodie

Hoodie Day
hiv awareness

Hiv Awareness Day
my little pony

My Little Pony Day