Oops, it doesn't look like 'give up the rights to shadowhunters day' is a national day..

Other days

law

Law Day
coffee

Coffee Day
lisp

Lisp Day
blanket fort

Blanket Fort Day
kale

Kale Day
one

One Day
bubble bath

Bubble Bath Day
gum

Gum Day
comfy

Comfy Day
self care

Self Care Day