laravel import excel data rows are null in php

I'm trying to import some excel data to my database,but the date format from excel are null in php.

     $this->validate($request, ['file' => 'required|mimes:xls,xlsx']);

    $path = $request->file('file')->getRealPath();


    $data = Excel::load($path)->formatDates( true, 'd-m-Y' )->get();


    if($data->count() > 0) {
        return view('employes.data')->with('data', $data);
        foreach($data->toArray() as $key) {

            foreach($key as $row) {
                $insert[] = array(
                    "nume" => $row['nume'],
                    'cnp' => $row['cnp'],
                    'functie' => $row['functie'],
                    'data_angajare' => $row['data_angajare'],
                    'ssm' => $row['ssm'],
                    'psi' => $row['psi'],
                    'fisa_aptitudini' => $row['fisa_aptitudini'],
                    'pram' => $row['pram'],

                );
            }
        }

        if(!empty($insert)) {
            DB::table('employes')->insert($insert);
        }
    }

result

[{"nume":"test","cnp":"test","functie":"test","data_angajare":null,"ssm":null,"psi":null,"fisa_aptitudini":null,"pram":null,"0":null},{"nume":"test","cnp":"test","functie":"test","data_angajare":null,"ssm":null,"psi":null,"fisa_aptitudini":null,"pram":null,"0":null},{"nume":"test","cnp":"test","functie":"test","data_angajare":null,"ssm":null,"psi":null,"fisa_aptitudini":null,"pram":null,"0":null},{"nume":"test","cnp":"test","functie":"test","data_angajare":null,"ssm":null,"psi":null,"fisa_aptitudini":null,"pram":null,"0":null},{"nume":"test","cnp":"test","functie":"test","data_angajare":null,"ssm":null,"psi":null,"fisa_aptitudini":null,"pram":null,"0":null},{"nume":"test","cnp":"test","functie":"test","data_angajare":null,"ssm":null,"psi":null,"fisa_aptitudini":null,"pram":null,"0":null},{"nume":"test","cnp":"test","functie":"test","data_angajare":null,"ssm":null,"psi":null,"fisa_aptitudini":null,"pram":null,"0":null},{"nume":"test","cnp":"test","functie":"test","data_angajare":null,"ssm":null,"psi":null,"fisa_aptitudini":null,"pram":null,"0":null},{"nume":"test","cnp":"test","functie":"test","data_angajare":null,"ssm":null,"psi":null,"fisa_aptitudini":null,"pram":null,"0":null},{"nume":"test","cnp":"test","functie":"test","data_angajare":null,"ssm":null,"psi":null,"fisa_aptitudini":null,"pram":null,"0":null},{"nume":"test","cnp":"test","functie":"test","data_angajare":null,"ssm":null,"psi":null,"fisa_aptitudini":null,"pram":null,"0":null}]

excel

nume    cnp functie data_angajare   ssm psi fisa_aptitudini pram
test    test    test    18/10/1000  18/10/1000  10/10/1000  10/10/1000  10/10/1000
test    test    test    18/10/1000  18/10/1000  10/10/1000  10/10/1000  10/10/1000
test    test    test    18/10/1000  18/10/1000  10/10/1000  10/10/1000  10/10/1000
test    test    test    18/10/1000  18/10/1000  10/10/1000  10/10/1000  10/10/1000
test    test    test    18/10/1000  18/10/1000  10/10/1000  10/10/1000  10/10/1000
test    test    test    18/10/1000  18/10/1000  10/10/1000  10/10/1000  10/10/1000
test    test    test    18/10/1000  18/10/1000  10/10/1000  10/10/1000  10/10/1000
test    test    test    18/10/1000  18/10/1000  10/10/1000  10/10/1000  10/10/1000
test    test    test    18/10/1000  18/10/1000  10/10/1000  10/10/1000  10/10/1000
test    test    test    18/10/1000  18/10/1000  10/10/1000  10/10/1000  10/10/1000
test    test    test    18/10/1000  18/10/1000  10/10/1000  10/10/1000  10/10/1000

via Chebli Mohamed