Oops, it doesn't look like 'parks to waive admission fees on day' is a national day..

Other days

Lumpy Rug Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Tulip Day

Eat What You Want Day

Nae Nae Day

First Love Day

Self Care Day

Donate Your Hair Day

Embarrass Your Best Friend Day

Prescription Drug Take Back Day