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

Other days

boyfriend

Boyfriend Day
stud

Stud Day
gallery

Gallery Day
pick me

Pick Me Day
lumpy rug

Lumpy Rug Day
hiv awareness

Hiv Awareness Day
offer

Offer Day
lisp

Lisp Day
nae nae

Nae Nae Day
mean girls

Mean Girls Day