code: public static MinguoDate of(int prolepticYear, int month, int dayOfMonth) {
          return MinguoChronology.INSTANCE.date(prolepticYear, month, dayOfMonth);
      }
docs: Obtains a {@code MinguoDate} representing a date in the Minguo calendar
  system from the proleptic-year, month-of-year and day-of-month fields.
  <p>
  This returns a {@code MinguoDate} with the specified fields.
  The day must be valid for the year and month, otherwise an exception will be thrown.
  
  @param prolepticYear  the Minguo proleptic-year
  @param month  the Minguo month-of-year, from 1 to 12
  @param dayOfMonth  the Minguo day-of-month, from 1 to 31
  @return the date in Minguo calendar system, not null
  @throws DateTimeException if the value of any field is out of range,
  or if the day-of-month is invalid for the month-year