Oops, it doesn't look like 'productivity council wishes happy independence day' is a national day..

Other days

unicorn

Unicorn Day
self appreciation

Self Appreciation Day
girl friend

Girl Friend Day
self care

Self Care Day
bow tie

Bow Tie Day
singles

Singles Day
kale

Kale Day
azonto is acceptable

Azonto Is Acceptable Day
donate your hair

Donate Your Hair Day
camera

Camera Day