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

Other days

lisp

Lisp Day
chocolate milkshake

Chocolate Milkshake Day
brow

Brow Day
believe

Believe Day
girl friend

Girl Friend Day
boy friend

Boy Friend Day
fiancee

Fiancee Day
tell a fairytale

Tell A Fairytale Day
gallery

Gallery Day
china

China Day