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

Other days

bounce

Bounce Day
ruby

Ruby Day
eat what you want

Eat What You Want Day
boyfriend

Boyfriend Day
lisp

Lisp Day
first love

First Love Day
youth

Youth Day
martini

Martini Day
polyamory

Polyamory Day
ponytail

Ponytail Day