Oops, it doesn't look like 'parks put a cap on the number of visitors allowed per day' is a national day..

Other days

Special Education Day

Fiancee Day

Buddy Day

Donate Your Hair Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Cursing Day

Pick Me Day

Boba Day

Tell Ur Crush You Like Them Day

Blanket Fort Day