Oops, it doesn't look like 'league adopted the stolen base rule day' is a national day..

Other days

fiancee

Fiancee Day
embarrass your best friend

Embarrass Your Best Friend Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
boy friend

Boy Friend Day
get funky

Get Funky Day
prescription drug take back

Prescription Drug Take Back Day
polyamory

Polyamory Day
reading

Reading Day
bonang

Bonang Day
frozen yogurt

Frozen Yogurt Day