code: public CalendarFormatter getCalendarFormatter(CLDR.Locale locale) {
      locale = bundleMatch(locale);
      CalendarFormatter formatter = CALENDAR_FORMATTERS.get(locale);
      return formatter == null ? CALENDAR_FORMATTERS.get(CLDR.Locale.en_US) : formatter;
    }
docs: Returns a calendar formatter for the given locale, translating it before lookup.