Description:
------------
---
From manual page: http://www.php.net/function.date-default-timezone-set#refsect1-function.date-default-timezone-set-parameters
---

The manual says that you can supply the UTC for the timezone_identifier. This is not true. The function will not accept a UTC. 

Here is an example error message:
Notice: date_default_timezone_set() [function.date-default-timezone-set]: Timezone ID '(UTC-12:00)' is invalid 


Test script:
---------------
$timeZone = "(UTC-12:00)";

// validate the timezone specified by the user
$script_tz = date_default_timezone_get();
if ( !date_default_timezone_set($timeZone) )
{
	date_default_timezone_set($script_tz);
	trigger_error("Timezone is invalid.", E_USER_ERROR);
}
date_default_timezone_set($script_tz);

Expected result:
----------------
I would like this function to accept a UTC for the timezone_identifier parameter.