<?php
var_dump(
(new DateTime('now 3 hours ago', new DateTimeZone('UTC')))->format('Y-m-d H:i:s Z'),
(new DateTime('now', new DateTimeZone('UTC')))->format('Y-m-d H:i:s Z')
);
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
string(21) "2018-04-27 10:04:55 0"
string(21) "2018-04-27 13:04:55 0"