1604728035 carbon format like this code example
Example 1: carbon date from format
Carbon::createFromFormat('Y-m-d H:i:s', $request->date)->format('d-m-Y')
Example 2: carbon format date in laravel
1. First parse the created_at field as Carbon object.
$createdAt = Carbon::parse($item['created_at']);
2.Then you can use
$suborder['payment_date'] = $createdAt->format('M d Y');