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

Other days

artists

Artists Day

gallery

Gallery Day

lisp

Lisp Day

nail polish

Nail Polish Day

Me Day

unicorn

Unicorn Day

lash

Lash Day

bonang

Bonang Day

ask out your crush

Ask Out Your Crush Day

coffee

Coffee Day