<?php
$a = new DateTime('2017-10-31T23:00:00Z', new \DateTimeZone("Europe/Berlin"));
echo $a->format('Y-m-d H:i:s');
$b = new DateTime($a->format('Y-m-d H:i:s'), new \DateTimeZone("Europe/Berlin"));
echo $a->format(DATE_ISO8601);
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
2017-10-31 23:00:002017-10-31T23:00:00+0000