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

Other days

offer

Offer Day
stud

Stud Day
eat what you want

Eat What You Want Day
bow tie

Bow Tie Day
comfy

Comfy Day
hiv awareness

Hiv Awareness Day
ruby

Ruby Day
law

Law Day
youth

Youth Day
cuddle up

Cuddle Up Day