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

Other days

comfy

Comfy Day
buddy

Buddy Day
ormille

Ormille Day
girl friend

Girl Friend Day
bounce

Bounce Day
ponytail

Ponytail Day
boy friend

Boy Friend Day
martini

Martini Day
polyamory

Polyamory Day
hannah

Hannah Day