Oops, it doesn't look like 'stop waste day' is a national day..

Other days

fiancee

Fiancee Day
lisp

Lisp Day
cursing

Cursing Day
boy friend

Boy Friend Day
bow tie

Bow Tie Day
kiss a brunette

Kiss A Brunette Day
gum

Gum Day
aloxolt

Aloxolt Day
azonto is acceptable

Azonto Is Acceptable Day
camera

Camera Day