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

Other days

slime

Slime Day
first love

First Love Day
stud

Stud Day
lisp

Lisp Day
promposal

Promposal Day
law

Law Day
my little pony

My Little Pony Day
get funky

Get Funky Day
eat what you want

Eat What You Want Day
hannah

Hannah Day