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

Other days

Ruby Day

Lash Day

Bow Tie Day

Blanket Fort Day

Ask Out Your Crush Day

Fiancee Day

Lumpy Rug Day

Emoji Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Bonang Day