Oops, it doesn't look like 'whistle blower day' is a national day..

Other days

kiss a ginger

Kiss A Ginger Day
polyamory

Polyamory Day
cuddle up

Cuddle Up Day
china

China Day
hoodie

Hoodie Day
brow

Brow Day
ask out your crush

Ask Out Your Crush Day
fiancee

Fiancee Day
kale

Kale Day
singles

Singles Day