/**
* Sets the system default time zone to the time zone in $id
*
* Sets the system default time zone to the time zone in $id
*
* @access public
* @param string $id
* the time zone id to use
*/
static function setDefault($id)
{
if (TimeZone::isValidID($id)) {
$GLOBALS['_DATE_TIMEZONE_DEFAULT'] = $id;
}
}
