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

Other days

fiancee

Fiancee Day
martini

Martini Day
boy friend

Boy Friend Day
brow

Brow Day
kale

Kale Day
hannah

Hannah Day
kiss a ginger

Kiss A Ginger Day
bow tie

Bow Tie Day
tell a fairytale

Tell A Fairytale Day
gum

Gum Day