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

Other days

brow

Brow Day
bubble bath

Bubble Bath Day
self appreciation

Self Appreciation Day
china

China Day
blanket fort

Blanket Fort Day
self care

Self Care Day
donate your hair

Donate Your Hair Day
emoji

Emoji Day
buddy

Buddy Day
tell a fairytale

Tell A Fairytale Day