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

Other days

lisp

Lisp Day
tell a fairytale

Tell A Fairytale Day
hannah

Hannah Day
donate your hair

Donate Your Hair Day
ormille

Ormille Day
comfy

Comfy Day
blanket fort

Blanket Fort Day
stud

Stud Day
boyfriend

Boyfriend Day
bow tie

Bow Tie Day