code: public static DescriptionStrategy daysOfWeekInstance(final ResourceBundle bundle, final FieldExpression expression, final FieldDefinition definition) {
  
          final Function<Integer, String> nominal = integer -> {
              final int diff = definition instanceof DayOfWeekFieldDefinition
                      ? DayOfWeek.MONDAY.getValue() - ((DayOfWeekFieldDefinition) definition).getMondayDoWValue().getMondayDoWValue()
                      : 0;
              return DayOfWeek.of(integer + diff < 1 ? 7 : integer + diff).getDisplayName(TextStyle.FULL, bundle.getLocale());
          };
  
          final NominalDescriptionStrategy dow = new NominalDescriptionStrategy(bundle, nominal, expression);
  
          dow.addDescription(fieldExpression -> {
              if (fieldExpression instanceof On) {
                  final On on = (On) fieldExpression;
                  switch (on.getSpecialChar().getValue()) {
                      case HASH:
                          return String.format("%s %s %s ", nominal.apply(on.getTime().getValue()), on.getNth(), bundle.getString("of_every_month"));
                      case L:
                          return String.format("%s %s %s ", bundle.getString("last"), nominal.apply(on.getTime().getValue()), bundle.getString("of_every_month"));
                      default:
                          return "";
                  }
              }
              return "";
          });
          return dow;
      }
docs: Creates description strategy for days of week.
  
  @param bundle     - locale
  @param expression - CronFieldExpression
  @return - DescriptionStrategy instance, never null