شمسی کردن کامپوننت های date editor و scheduler در devexpress

با سلام خدمت دوستان
من تا حدی تونستم با مِتد زیر انجام بدم، تقویم devexpress رو شمسی کنم و یه مشکلی هم دارم:

public void ToPersian(DevExpress.XtraEditors.DateEdit DateTimePicker){

    System.Globalization.PersianCalendar Shamsi = new System.Globalization.PersianCalendar();

    DateTime PersianToday = Shamsi.GetYear(DateTime.Now) + "/" + Shamsi.GetMonth(DateTime.Now) + "/" + Shamsi.GetDayOfMonth(DateTime.Now);

    System.Threading.Thread.CurrentThread.CurrentCultu  re = new System.Globalization.CultureInfo("fa-IR");

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.MonthNames = new string[] { "فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور", "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.MonthGenitiveNames = new string[] { "فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور", "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.AbbreviatedMonthNames = new string[] { "فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور", "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.AbbreviatedMonthGenitiveNames = new string[] { "فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور", "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.AbbreviatedDayNames = new string[] { "ی", "د", "س", "چ", "پ", "ج", "ش" };

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.ShortestDayNames = new string[] { "ی", "د", "س", "چ", "پ", "ج", "ش" };

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.DayNames = new string[] { "یکشنبه", "دوشنبه", "ﺳﻪشنبه", "چهارشنبه", "پنجشنبه", "جمعه", "شنبه" };

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.AMDesignator = "ق.ظ";

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.PMDesignator = "ب.ظ";

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.ShortTimePattern = "HH:mm";

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.DateSeparator = "/";

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.FullDateTimePattern = "dd/MM/yyyy HH:mm";

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.FirstDayOfWeek = DayOfWeek.Saturday;

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.ShortDatePattern = "dd/MM/yyyy";

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.LongDatePattern = "dd/MM/yyyy HH:mm";

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.SetAllDateTimePatterns(new string[] { "dd/MM/yyyy" }, 'd');

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.SetAllDateTimePatterns(new string[] { "dddd, dd MMMM yyyy" }, 'D');

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.SetAllDateTimePatterns(new string[] { "yyyy MMMM" }, 'y');

    System.Threading.Thread.CurrentThread.CurrentCultu  re.DateTimeFormat.SetAllDateTimePatterns(new string[] { "yyyy MMMM" }, 'Y');

 

    DateTimePicker.EditValue = PersianToday;

    DateTimePicker.Properties.TodayDate = PersianToday;

    DateTimePicker.Properties.EditFormat.FormatType = DevExpress.Utils.FormatType.DateTime;

    DateTimePicker.Properties.DisplayFormat.FormatType = DevExpress.Utils.FormatType.DateTime;

    DateTimePicker.Properties.FirstDayOfWeek = DayOfWeek.Saturday;

    DateTimePicker.Properties.EditMask = "yyyy/MM/dd";

    DateTimePicker.Properties.Mask.UseMaskAsDisplayFor  mat = true;

    DateTimePicker.RightToLeft = RightToLeft.Yes;

}

نتیجه کار به شکل زیر شده:

ضمیمه 148928

فقط اینجا یه مشکلی هست روزهای هفته درست قرار نمیگیره و شش ماه دوم 31 روز هم داره. مثلا ماه اسفند!! که اگر اساتید راهنمایی کنن این مورد هم حل میشه....