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

Other days

china

China Day
lisp

Lisp Day
slime

Slime Day
kiss a ginger

Kiss A Ginger Day
reading

Reading Day
law

Law Day
mean girls

Mean Girls Day
nae nae

Nae Nae Day
lumpy rug

Lumpy Rug Day
offer

Offer Day