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

Other days

cuddle up

Cuddle Up Day
eat what you want

Eat What You Want Day
prosecco

Prosecco Day
law

Law Day
camera

Camera Day
kiss a ginger

Kiss A Ginger Day
ruby

Ruby Day
china

China Day
believe

Believe Day
gum

Gum Day