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

Other days

stud

Stud Day
cuddle up

Cuddle Up Day
hoodie

Hoodie Day
eat what you want

Eat What You Want Day
fiancee

Fiancee Day
bounce

Bounce Day
brow

Brow Day
nail polish

Nail Polish Day
bow tie

Bow Tie Day
ruby

Ruby Day