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

Other days

nail polish

Nail Polish Day
stud

Stud Day
ormille

Ormille Day
tell a fairytale

Tell A Fairytale Day
martini

Martini Day
ruby

Ruby Day
slime

Slime Day
bounce

Bounce Day
pumpkin

Pumpkin Day
ride the wind

Ride The Wind Day