public function setTimeZone($timezone)
	{
		$this->timezone = ($timezone instanceof \DateTimeZone)
			? $timezone
			: new \DateTimeZone($timezone);

		return $this;
	}
public function setTimeZone($timezone)
	{
		$this->timezone = ($timezone instanceof \DateTimeZone)
			? $timezone
			: new \DateTimeZone($timezone);

		return $this;
	}
public function setTimeZone ( $ timezone ) { $ this -> timezone = ( $ timezone instanceof \ DateTimeZone ) ? $ timezone : new \ DateTimeZone ( $ timezone ) ; return $ this ; }
Set global time zone

@param string|\DateTimeZone $timezone

@return DateExtension class instance to allow chaining

@since 1.1
@throws \Exception Unknown or bad
Set global time zone