Oops, it doesn't look like 'multiplex chain on day' is a national day..

Other days

kale

Kale Day
lash

Lash Day
healing

Healing Day
reading

Reading Day
singles

Singles Day
kiss a brunette

Kiss A Brunette Day
boy friend

Boy Friend Day
stud

Stud Day
ruby

Ruby Day
tell a fairytale

Tell A Fairytale Day