Oops, it doesn't look like 'mean girls coming out day' is a national day..

Other days

carpenters

Carpenters Day
bounce

Bounce Day
gum

Gum Day
mean girls

Mean Girls Day
me

Me Day
bubble bath

Bubble Bath Day
bow tie

Bow Tie Day
blanket fort

Blanket Fort Day
stress awareness

Stress Awareness Day
nail polish

Nail Polish Day