public final CalendarDate getReferenceTime() {
    int sec = (second < 0 || second > 59) ? 0 : second;
    return CalendarDate.of(null, year, month, day, hour, minute, sec);
  }
public final CalendarDate getReferenceTime() {
    int sec = (second < 0 || second > 59) ? 0 : second;
    return CalendarDate.of(null, year, month, day, hour, minute, sec);
  }
public final CalendarDate getReferenceTime ( ) { int sec = ( second < 0 || second > 59 ) ? 0 : second ; return CalendarDate . of ( null , year , month , day , hour , minute , sec ) ; }
return record header time as a CalendarDate

@return referenceTime
return record header time as a CalendarDate