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

Other days

gum

Gum Day
kiss a ginger

Kiss A Ginger Day
ormille

Ormille Day
hannah

Hannah Day
stud

Stud Day
slime

Slime Day
reading

Reading Day
one

One Day
blanket fort

Blanket Fort Day
ask out your crush

Ask Out Your Crush Day