Oops, it doesn't look like 'cemetery for the memorial day' is a national day..

Other days

gum

Gum Day
pumpkin

Pumpkin Day
blanket fort

Blanket Fort Day
lash

Lash Day
bow tie

Bow Tie Day
lisp

Lisp Day
prosecco

Prosecco Day
believe

Believe Day
bonang

Bonang Day
nae nae

Nae Nae Day