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

Other days

ruby

Ruby Day
pick me

Pick Me Day
ride the wind

Ride The Wind Day
fiancee

Fiancee Day
bow tie

Bow Tie Day
stud

Stud Day
hannah

Hannah Day
donate your hair

Donate Your Hair Day
prosecco

Prosecco Day
coffee

Coffee Day