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

Other days

cuddle up

Cuddle Up Day
azonto is acceptable

Azonto Is Acceptable Day
lisp

Lisp Day
ruby

Ruby Day
eat what you want

Eat What You Want Day
stud

Stud Day
china

China Day
my little pony

My Little Pony Day
hoodie

Hoodie Day
camera

Camera Day