Latte\Runtime\Filters::date PHP Method

    public static function date($time, $format = NULL)
    {
        if ($time == NULL) {
            // intentionally ==
            return NULL;
        }
        if (!isset($format)) {
            $format = self::$dateFormat;
        }
        if ($time instanceof \DateInterval) {
            return $time->format($format);
        } elseif (is_numeric($time)) {
            $time = new \DateTime('@' . $time);
            $time->setTimeZone(new \DateTimeZone(date_default_timezone_get()));
        } elseif (!$time instanceof \DateTime && !$time instanceof \DateTimeInterface) {
            $time = new \DateTime($time);
        }
        return strpos($format, '%') === FALSE ? $time->format($format) : strftime($format, $time->format('U'));
        // formats according to locales
    }