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

Other days

pampering

Pampering Day
stud

Stud Day
lisp

Lisp Day
ride the wind

Ride The Wind Day
bounce

Bounce Day
frozen yogurt

Frozen Yogurt Day
brow

Brow Day
gallery

Gallery Day
nae nae

Nae Nae Day
slime

Slime Day