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

Other days

reading

Reading Day
boyfriend

Boyfriend Day
tulip

Tulip Day
ride the wind

Ride The Wind Day
ormille

Ormille Day
kiss a ginger

Kiss A Ginger Day
gum

Gum Day
healing

Healing Day
bow tie

Bow Tie Day
bounce

Bounce Day