Carbono subtraia duas datas
$date = Carbon::parse('2016-09-17 11:00:00');
$now = Carbon::now();
$diff = $date->diffInDays($now);
Bug Killer
$date = Carbon::parse('2016-09-17 11:00:00');
$now = Carbon::now();
$diff = $date->diffInDays($now);