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

Other days

ponytail

Ponytail Day
first love

First Love Day
bow tie

Bow Tie Day
comfy

Comfy Day
hannah

Hannah Day
cuddle up

Cuddle Up Day
donate your hair

Donate Your Hair Day
pampering

Pampering Day
pumpkin

Pumpkin Day
singles

Singles Day