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

Other days

gum

Gum Day
lash

Lash Day
bounce

Bounce Day
kiss a ginger

Kiss A Ginger Day
aloxolt

Aloxolt Day
camera

Camera Day
slime

Slime Day
unicorn

Unicorn Day
polyamory

Polyamory Day
blanket fort

Blanket Fort Day