Oops, it doesn't look like 'perp walk day' is a national day..

Other days

hoodie

Hoodie Day
eat what you want

Eat What You Want Day
offer

Offer Day
my little pony

My Little Pony Day
girl friend

Girl Friend Day
hannah

Hannah Day
youth

Youth Day
law

Law Day
tulip

Tulip Day
kiss a ginger

Kiss A Ginger Day