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

Other days

unicorn

Unicorn Day
cuddle up

Cuddle Up Day
blanket fort

Blanket Fort Day
martini

Martini Day
aloxolt

Aloxolt Day
hoodie

Hoodie Day
ruby

Ruby Day
kale

Kale Day
comfy

Comfy Day
believe

Believe Day