Oops, it doesn't look like 'step in a puddle and splash your friend day' is a national day..

Other days

mean girls

Mean Girls Day
slime

Slime Day
bounce

Bounce Day
me

Me Day
embarrass your best friend

Embarrass Your Best Friend Day
nail polish

Nail Polish Day
tell a fairytale

Tell A Fairytale Day
kiss a ginger

Kiss A Ginger Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
boy friend

Boy Friend Day