code: public static DateFormat getDateFormat() {
          if (DATE_FORMATS.get() == null) {
              DATE_FORMATS.set((DateFormat) BASE_DATE_FORMAT.clone());
          }
          return DATE_FORMATS.get();
      }
docs: Returns a {@link DateFormat} instance using the
  {@link #LIGHTBLUE_DATE_FORMAT_STR}. Uses {@link ThreadLocal} under the
  hood, because {@link SimpleDateFormat} is not thread safe