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

Other days

donate your hair

Donate Your Hair Day
unicorn

Unicorn Day
bonang

Bonang Day
kale

Kale Day
polyamory

Polyamory Day
bow tie

Bow Tie Day
nae nae

Nae Nae Day
ponytail

Ponytail Day
raise awerness of zeus

Raise Awerness Of Zeus Day
one

One Day