code: HistoricDate newYear(
          HistoricEra era,
          int yearOfDisplay
      ) {
  
          return rule(era, yearOfDisplay).newYear(era, yearOfDisplay);
  
      }
docs: <p>Determines the date of New Year. </p>
  
  @param   era             historic era
  @param   yearOfDisplay   historic year of era as displayed (deviating from standard calendar year)
  @return  historic date of New Year
  @since   3.14/4.11