Answers for "creat datetime php with no timezone"

php get timezone

echo date_default_timezone_get(); //UTC

//Read more at https://www.php.net/manual/en/function.date-default-timezone-get.php

php datetime set timezone

$date = new \DateTime();
$date->setTimezone(new \DateTimeZone('+0800')); //GMT
echo $date->format('Y-m-d H:i:s');
// 2020-11-20 15:23:49