code: public static EthiopianCalendar of(
          EthiopianEra era,
          int yearOfEra,
          EthiopianMonth month,
          int dayOfMonth
      ) {
  
          return EthiopianCalendar.of(era, yearOfEra, month.getValue(), dayOfMonth);
  
      }
docs: /*[deutsch]
  <p>Erzeugt ein neues &auml;thiopisches Kalenderdatum. </p>
  
  @param   era         Ethiopian era
  @param   yearOfEra   Ethiopian year of era in the range 1-9999 (1-15499 if amete alem)
  @param   month       Ethiopian month
  @param   dayOfMonth  Ethiopian day of month in the range 1-30
  @return  new instance of {@code EthiopianCalendar}
  @throws  IllegalArgumentException in case of any inconsistencies
  @since   3.11/4.8