Oops, it doesn't look like 'velvet hammer day' is a national day..

Other days

lash

Lash Day
buddy

Buddy Day
offer

Offer Day
girl friend

Girl Friend Day
singles

Singles Day
mean girls

Mean Girls Day
kiss a ginger

Kiss A Ginger Day
ride the wind

Ride The Wind Day
martini

Martini Day
unicorn

Unicorn Day