code: @Override
      public BritishCutoverDate date(int prolepticYear, int month, int dayOfMonth) {
          return BritishCutoverDate.of(prolepticYear, month, dayOfMonth);
      }
docs: Obtains a local date in British Cutover calendar system from the
  proleptic-year, month-of-year and day-of-month fields.
  <p>
  Dates in the middle of the cutover gap, such as the 10th September 1752,
  will not throw an exception. Instead, the date will be treated as a Julian date
  and converted to an ISO date, with the day of month shifted by 11 days.
  
  @param prolepticYear  the proleptic-year
  @param month  the month-of-year
  @param dayOfMonth  the day-of-month
  @return the British Cutover local date, not null
  @throws DateTimeException if unable to create the date