如何在phpspreadsheet中自定义日期格式？

use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
use PhpOffice\PhpSpreadsheet\Style\NumberFormat;

$spreadsheet = new Spreadsheet();

$sheet = $spreadsheet->getActiveSheet();
$cell = $sheet->getCell('A1');

$date = new DateTime('2022-01-01');
$cell->setValue($date);

$cell->getStyle()->getNumberFormat()->setFormatCode('yyyy-mm-dd');

$writer = new Xlsx($spreadsheet);
$writer->save('example.xlsx');