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

Other days

boba

Boba Day
eat what you want

Eat What You Want Day
unicorn

Unicorn Day
book

Book Day
hoodie

Hoodie Day
polyamory

Polyamory Day
self care

Self Care Day
my little pony

My Little Pony Day
reading

Reading Day
lisp

Lisp Day