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

Other days

tell a fairytale

Tell A Fairytale Day
gum

Gum Day
frozen yogurt

Frozen Yogurt Day
self appreciation

Self Appreciation Day
boba

Boba Day
stud

Stud Day
lisp

Lisp Day
coffee

Coffee Day
believe

Believe Day
slime

Slime Day