function Persia_to_Ger_date(aa: ShortString; ResultKind: Byte = 0): ShortString;
  function TrueTo1(co: Boolean): Integer;
  begin
  if co then TrueTo1 := 1
  else
  TrueTo1 := 0;
  end;
  const
  Conm_mons: array[0..11] of Byte = (31,28,31,30,31,30,31,31,30,31,30,31);
  LeapYearSh: array[0..4] of Integer = (1375,1379,1383,1387,1391);
  LeapYearMi: array[0..4] of Integer = (1996,2000,2004,2008,2012);
  monthes: array[0..11] of ShortString = ('Jan', 'Feb', 'Mar', 'Apr',
  'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec');
 type
  date = record
  da_day, da_mon, da_year: Integer;
  end;
 var
  m_mons: array[0..11] of BYTE;
  LastDayCountSh, LastDayCountMi: integer;
  a, b: date;
  sYY, sMM, sDD: ShortString;
  I: Integer;
 begin
  for I := Low(Conm_mons) to High(Conm_mons) do
  m_mons[I] := Conm_mons[I];
  a.da_day := StrToNum(Copy(aa, DayPosInDate, DayLen));
  a.da_mon := StrToNum(Copy(aa, MonthPosInDate, MonthLen));
  a.da_year := StrToNum(Copy(aa, YearPosInDate, YearLen));
  b.da_year := a.da_year + 621;
  Inc(b.da_year, TrueTo1(((a.da_mon > 10) or ((a.da_mon = 10) and (a.da_day >= 12)))
  or ((LeapYearSh[(a.da_year - 1374) div 4] <> a.da_year) and
  ((a.da_mon = 10) and (a.da_day = 11)))));
  Inc(m_mons[1], TrueTo1(LeapYearMi[(b.da_year - 1996) div 4] = b.da_year));
  if (a.da_mon <= 7) then LastDayCountSh := ((a.da_mon - 1) * 31 + a.da_day)
  else
  LastDayCountSh := (186 + (a.da_mon - 7) * 30 + a.da_day);
  if (b.da_year = (a.da_year + 622)) then LastDayCountMi :=
  LastDayCountSh - 286 - TrueTo1(LeapYearSh[(a.da_year - 1375) div 4] = a.da_year)
  else
  LastDayCountMi := (LastDayCountSh + 79);
  b.da_day := LastDayCountMi;
  b.da_mon := 0;
  while (LastDayCountMi > m_mons[b.da_mon]) do
  begin
  Dec(LastDayCountMi, m_mons[b.da_mon]);
  Inc(b.da_mon);
  b.da_day := LastDayCountMi;
  end;
  Inc(b.da_mon);
  if b.da_year < 1000 then sYY := sYY + '0';
  if b.da_year < 100 then sYY := sYY + '0';
  if b.da_year < 10 then sYY := sYY + '0';
  sYY := sYY + IntToStr(b.da_year);
  if b.da_mon < 10 then sMM := sMM + '0';
  sMM := sMM + IntToStr(b.da_mon);
  if b.da_day < 10 then sDD := sDD + '0';
  sDD := sDD + IntToStr(b.da_day);
  case ResultKind of
  0: Persia_to_Ger_date := sYY + '/' + sMM + '/' + sDD;
  1: Persia_to_Ger_date := sYY + ' ' + monthes[b.da_mon - 1] + ' ' + sDD;
  end;
 end;