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

Other days

pampering

Pampering Day
lisp

Lisp Day
nae nae

Nae Nae Day
boy friend

Boy Friend Day
self appreciation

Self Appreciation Day
offer

Offer Day
reading

Reading Day
bonang

Bonang Day
gum

Gum Day
singles

Singles Day