Carbon date Difference method giving wrong date difference in Laravel 5.7 [closed]

I am getting wrong Date difference between two dates using Carbon in Laravel 5.7.

here this image is showing you Date of sdate value and edate value

my code is

$date = Carbon::parse($sdate);
$now = Carbon::parse($eDate);
$diff = $date->diffInDays($now);
  return ["sdate"=>$sdate,
          "eDate"=>$eDate,
          "total" => $diff, 
          "holidays" => $holidayDayCount,
          "classes" => $diff - count($leaveDayArr),'sunday'=>$sundayArr ,'offDate'=>$offDay
        ];

After this I am getting in API response.

it is showing me 29 but it should be 30.

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