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

Other days

bounce

Bounce Day
lash

Lash Day
camera

Camera Day
martini

Martini Day
unicorn

Unicorn Day
bubble bath

Bubble Bath Day
kale

Kale Day
self care

Self Care Day
lisp

Lisp Day
law

Law Day