Oops, it doesn't look like 'parks and forests on presidents day' is a national day..

Other days

cursing

Cursing Day
lisp

Lisp Day
pumpkin

Pumpkin Day
boy friend

Boy Friend Day
believe

Believe Day
self appreciation

Self Appreciation Day
kiss a brunette

Kiss A Brunette Day
azonto is acceptable

Azonto Is Acceptable Day
my little pony

My Little Pony Day
kiss a ginger

Kiss A Ginger Day