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

Other days

pampering

Pampering Day
mean girls

Mean Girls Day
pick me

Pick Me Day
first love

First Love Day
hoodie

Hoodie Day
bonang

Bonang Day
nae nae

Nae Nae Day
ask out your crush

Ask Out Your Crush Day
tulip

Tulip Day
healing

Healing Day