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

Other days

camera

Camera Day
mean girls

Mean Girls Day
cat girl

Cat Girl Day
prosecco

Prosecco Day
kiss a ginger

Kiss A Ginger Day
boba

Boba Day
ruby

Ruby Day
believe

Believe Day
ormille

Ormille Day
brow

Brow Day