Oops, it doesn't look like 'stuff yer face day' is a national day..

Other days

lisp

Lisp Day
kiss a brunette

Kiss A Brunette Day
believe

Believe Day
offer

Offer Day
aloxolt

Aloxolt Day
frozen yogurt

Frozen Yogurt Day
lash

Lash Day
my little pony

My Little Pony Day
buddy

Buddy Day
ruby

Ruby Day