private function toTimezone($zone) {
		return isset($this->windowsTimezones[$zone]) ? $this->windowsTimezones[$zone] : $zone;
	}
private function toTimezone($zone) {
		return isset($this->windowsTimezones[$zone]) ? $this->windowsTimezones[$zone] : $zone;
	}
private function toTimezone ( $ zone ) { return isset ( $ this -> windowsTimezones [ $ zone ] ) ? $ this -> windowsTimezones [ $ zone ] : $ zone ; }
Process timezone and return correct one...

@param string $zone
@return mixed|null
Process timezone and return correct one ...