Oops, it doesn't look like 'ParkOn The Beach In The Middle Of The day' is a national day..

Other days

prescription drug take back

Prescription Drug Take Back Day
reading

Reading Day
ruby

Ruby Day
unicorn

Unicorn Day
ormille

Ormille Day
girl friend

Girl Friend Day
boy friend

Boy Friend Day
embarrass your best friend

Embarrass Your Best Friend Day
blanket fort

Blanket Fort Day
eat what you want

Eat What You Want Day