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

Other days

healing

Healing Day
raise awerness of zeus

Raise Awerness Of Zeus Day
first love

First Love Day
fiancee

Fiancee Day
bounce

Bounce Day
cursing

Cursing Day
blanket fort

Blanket Fort Day
mean girls

Mean Girls Day
hannah

Hannah Day
lash

Lash Day