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

Other days

lisp

Lisp Day
gum

Gum Day
boy friend

Boy Friend Day
frozen yogurt

Frozen Yogurt Day
eat what you want

Eat What You Want Day
brow

Brow Day
pumpkin

Pumpkin Day
buddy

Buddy Day
nae nae

Nae Nae Day
hiv awareness

Hiv Awareness Day