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

Other days

special education

Special Education Day
bow tie

Bow Tie Day
nail polish

Nail Polish Day
first love

First Love Day
bounce

Bounce Day
lisp

Lisp Day
unicorn

Unicorn Day
ruby

Ruby Day
hiv awareness

Hiv Awareness Day
brow

Brow Day