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

Other days

gum

Gum Day
bubble bath

Bubble Bath Day
one

One Day
frozen yogurt

Frozen Yogurt Day
lisp

Lisp Day
singles

Singles Day
ask out your crush

Ask Out Your Crush Day
my little pony

My Little Pony Day
aloxolt

Aloxolt Day
carpenters

Carpenters Day