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

Other days

tulip

Tulip Day
book

Book Day
ask out your crush

Ask Out Your Crush Day
mean girls

Mean Girls Day
stress awareness

Stress Awareness Day
first love

First Love Day
one

One Day
lisp

Lisp Day
comfy

Comfy Day
carpenters

Carpenters Day