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

Other days

hiv awareness

Hiv Awareness Day
gum

Gum Day
lisp

Lisp Day
cuddle up

Cuddle Up Day
martini

Martini Day
cat girl

Cat Girl Day
raise awerness of zeus

Raise Awerness Of Zeus Day
artists

Artists Day
ormille

Ormille Day
promposal

Promposal Day