Oops, it doesn't look like 'park for free this public lands day' is a national day..

Other days

Cuddle Up Day

Youth Day

Bow Tie Day

Appreciate Yaself A Lil Extra Day

Gallery Day

Chocolate Milkshake Day

Frozen Yogurt Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Lost Sock Memorial Day

Boba Day