For starters, it falls on a Sunday. Our holidays are back-loaded (Thanksgiving, Christmas, New Year's Day - yes technically not "back-loaded" but so close to Christmas).
Christmas is a secularized holiday that always falls on the same day. Easter may be secularized, but Good Friday certainly isn't, so governments can't designate it as a holiday here as it would be seen as establishing a state religion.
wow we got 14 public holidays here. good thing i am not working for an US Company i guess