The date_timezone_get() function return time zone relative to given DateTime.
Syntax
date_timezone_get(obj)
Parameters
obj − Specifies the DateTime object.
Return
The date_timezone_get() function returns DateTimeZone object on success or FALSE on failure.
Example
The following is an example −
<?php
$dt = date_create(null,timezone_open("Asia/Kolkata"));
$time_zone = date_timezone_get($dt);
echo timezone_name_get($time_zone);
?>
Output
Asia/Kolkata