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

Other days

ponytail

Ponytail Day
self care

Self Care Day
blanket fort

Blanket Fort Day
gallery

Gallery Day
bonang

Bonang Day
raise awerness of zeus

Raise Awerness Of Zeus Day
unicorn

Unicorn Day
slime

Slime Day
china

China Day
tulip

Tulip Day