1. First parse the created_at field as Carbon object.
$createdAt = Carbon::parse($item['created_at']);
2.Then you can use
$suborder['payment_date'] = $createdAt->format('M d Y');$now = Carbon::now();
echo $now; // 2020-03-22 17:45:58
echo "\n";
$today = Carbon::today();
echo $today; // 2020-03-22 00:00:00
echo "\n";
$tomorrow = Carbon::tomorrow('Europe/London');
echo $tomorrow; // 2020-03-23 00:00:00
echo "\n";
$yesterday = Carbon::yesterday();
echo $yesterday; // 2020-03-21 00:00:00//to get last year using carbon, first get this year, then subract one:
(Carbon::now()->year)-1