Oops, it doesn't look like 'Champ Twice In The Same day' is a national day..

Other days

law

Law Day
ruby

Ruby Day
polyamory

Polyamory Day
bow tie

Bow Tie Day
tulip

Tulip Day
artists

Artists Day
bounce

Bounce Day
lash

Lash Day
kale

Kale Day
blanket fort

Blanket Fort Day