Oops, it doesn't look like 'public lands parks are free on day' is a national day..

Other days

artists

Artists Day
martini

Martini Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
aloxolt

Aloxolt Day
ride the wind

Ride The Wind Day
me

Me Day
cuddle up

Cuddle Up Day
boy friend

Boy Friend Day
bow tie

Bow Tie Day
eat what you want

Eat What You Want Day