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

Other days

tell a fairytale

Tell A Fairytale Day
nae nae

Nae Nae Day
blanket fort

Blanket Fort Day
fiancee

Fiancee Day
lumpy rug

Lumpy Rug Day
cat girl

Cat Girl Day
bubble bath

Bubble Bath Day
brow

Brow Day
ruby

Ruby Day
bonang

Bonang Day