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

Other days

law

Law Day
ponytail

Ponytail Day
nae nae

Nae Nae Day
donate your hair

Donate Your Hair Day
hiv awareness

Hiv Awareness Day
first love

First Love Day
lost sock memorial

Lost Sock Memorial Day
lash

Lash Day
pick me

Pick Me Day
one

One Day