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

Other days

kale

Kale Day
my little pony

My Little Pony Day
bounce

Bounce Day
bubble bath

Bubble Bath Day
girl friend

Girl Friend Day
tell a fairytale

Tell A Fairytale Day
pick me

Pick Me Day
gum

Gum Day
carpenters

Carpenters Day
pumpkin

Pumpkin Day