Oops, it doesn't look like 'media goes nuts for modern day' is a national day..

Other days

one

One Day
lisp

Lisp Day
lost sock memorial

Lost Sock Memorial Day
gum

Gum Day
cursing

Cursing Day
lumpy rug

Lumpy Rug Day
nae nae

Nae Nae Day
hoodie

Hoodie Day
believe

Believe Day
hannah

Hannah Day