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

Other days

unicorn

Unicorn Day
ruby

Ruby Day
bow tie

Bow Tie Day
ride the wind

Ride The Wind Day
kale

Kale Day
one

One Day
mean girls

Mean Girls Day
singles

Singles Day
raise awerness of zeus

Raise Awerness Of Zeus Day
self care

Self Care Day