how can I set the timezone in config.php?

[gunter]

How ist it possible to se the correct timezone in config.php?
It works for me only with the native php date_default_timezone_set():

/**
 * Installer: Time zone setting
 * 
 */
$config->timezone = 'UTC';
echo "<br>date:". date('m/d/Y h:i:s a', time());

$config->timezone = 'Europe/Vienna';
echo "<br>date:". date('m/d/Y h:i:s a', time());

date_default_timezone_set('Europe/Vienna');
echo "<br>date:". date('m/d/Y h:i:s a', time());

I´m getting this, the last line is correct

date:05/24/2021 09:17:58 am
date:05/24/2021 09:17:58 am
date:05/24/2021 11:17:58 am //<- yes this is my time!