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

Other days

Get Funky Day

Ask Out Your Crush Day

Hot Chocolate Day

Brow Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Carpenters Day

Embarrass Your Best Friend Day

Unicorn Day

Self Care Day

Fiancee Day