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

Other days

kiss a ginger

Kiss A Ginger Day

cat girl

Cat Girl Day

fiancee

Fiancee Day

reading

Reading Day

martini

Martini Day

pick me

Pick Me Day

first love

First Love Day

Me Day

gallery

Gallery Day

kiss a brunette

Kiss A Brunette Day