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

Other days

comfy

Comfy Day
get funky

Get Funky Day
china

China Day
pampering

Pampering Day
my little pony

My Little Pony Day
promposal

Promposal Day
cat girl

Cat Girl Day
eat what you want

Eat What You Want Day
self care

Self Care Day
believe

Believe Day