Oops, it doesn't look like 'law enforcement museum will open to the public on the same day' is a national day..

Other days

lumpy rug

Lumpy Rug Day
fiancee

Fiancee Day
ruby

Ruby Day
bounce

Bounce Day
me

Me Day
one

One Day
cat girl

Cat Girl Day
gum

Gum Day
bow tie

Bow Tie Day
kiss a ginger

Kiss A Ginger Day