int GetDayOfOmer(JewishMonth jewishMonth, int dayOfMonth)
{
int omer = -1; // not a day of the Omer
// if Nissan and second day of Pesach and on
if (jewishMonth == JewishMonth.NISSAN && dayOfMonth >= 16)
{
omer = dayOfMonth - 15;
// if Iyar
}
else if (jewishMonth == JewishMonth.IYAR)
{
omer = dayOfMonth + 15;
// if Sivan and before Shavuos
}
else if (jewishMonth == JewishMonth.SIVAN && dayOfMonth < 6)
{
omer = dayOfMonth + 44;
}
return(omer);
}
JewishHoliday GetJewishHoliday(int dayOfMonth, int dayOfWeek, int year,
bool inIsrael, bool useModernHolidays, JewishMonth hebrewMonth,
bool isAdar29Days)
{
switch (hebrewMonth)
{
case JewishMonth.NISSAN:
if (dayOfMonth == 14)
{
return(JewishHoliday.EREV_PESACH);
}
else if (dayOfMonth == 15 || dayOfMonth == 21 ||
(!inIsrael && (dayOfMonth == 16 || dayOfMonth == 22)))
{
return(JewishHoliday.PESACH);
}
else if (dayOfMonth >= 17 && dayOfMonth <= 20 ||
(dayOfMonth == 16 && inIsrael))
{
return(JewishHoliday.CHOL_HAMOED_PESACH);
}
if (useModernHolidays &&
((dayOfMonth == 26 && dayOfWeek == 5) ||
(dayOfMonth == 28 && dayOfWeek == 2) ||
(dayOfMonth == 27 && dayOfWeek != 1 && dayOfWeek != 6)))
{
return(JewishHoliday.YOM_HASHOAH);
}
break;
case JewishMonth.IYAR:
if (useModernHolidays &&
((dayOfMonth == 4 && dayOfWeek == 3) ||
((dayOfMonth == 3 || dayOfMonth == 2) && dayOfWeek == 4) || (dayOfMonth == 5 && dayOfWeek == 2)))
{
return(JewishHoliday.YOM_HAZIKARON);
}
// if 5 Iyar falls on Wed Yom Haatzmaut is that day. If it fal1s on Friday or Shabbos it is moved back to
// Thursday. If it falls on Monday it is moved to Tuesday
if (useModernHolidays &&
((dayOfMonth == 5 && dayOfWeek == 4) ||
((dayOfMonth == 4 || dayOfMonth == 3) && dayOfWeek == 5) || (dayOfMonth == 6 && dayOfWeek == 3)))
{
return(JewishHoliday.YOM_HAATZMAUT);
}
if (dayOfMonth == 14)
{
return(JewishHoliday.PESACH_SHENI);
}
if (useModernHolidays && dayOfMonth == 28)
{
return(JewishHoliday.YOM_YERUSHALAYIM);
}
break;
case JewishMonth.SIVAN:
if (dayOfMonth == 5)
{
return(JewishHoliday.EREV_SHAVUOS);
}
else if (dayOfMonth == 6 || (dayOfMonth == 7 && !inIsrael))
{
return(JewishHoliday.SHAVUOS);
}
break;
case JewishMonth.TAMMUZ:
// push off the fast day if it falls on Shabbos
if ((dayOfMonth == 17 && dayOfWeek != 7) ||
(dayOfMonth == 18 && dayOfWeek == 1))
{
return(JewishHoliday.SEVENTEEN_OF_TAMMUZ);
}
break;
case JewishMonth.AV:
// if Tisha B'av falls on Shabbos, push off until Sunday
if ((dayOfWeek == 1 && dayOfMonth == 10) ||
(dayOfWeek != 7 && dayOfMonth == 9))
{
return(JewishHoliday.TISHA_BEAV);
}
else if (dayOfMonth == 15)
{
return(JewishHoliday.TU_BEAV);
}
break;
case JewishMonth.ELUL:
if (dayOfMonth == 29)
{
return(JewishHoliday.EREV_ROSH_HASHANA);
}
break;
case JewishMonth.TISHREI:
if (dayOfMonth == 1 || dayOfMonth == 2)
{
return(JewishHoliday.ROSH_HASHANA);
}
else if ((dayOfMonth == 3 && dayOfWeek != 7) ||
(dayOfMonth == 4 && dayOfWeek == 1))
{
// push off Tzom Gedalia if it falls on Shabbos
return(JewishHoliday.FAST_OF_GEDALYAH);
}
else if (dayOfMonth == 9)
{
return(JewishHoliday.EREV_YOM_KIPPUR);
}
else if (dayOfMonth == 10)
{
return(JewishHoliday.YOM_KIPPUR);
}
else if (dayOfMonth == 14)
{
return(JewishHoliday.EREV_SUCCOS);
}
if (dayOfMonth == 15 || (dayOfMonth == 16 && !inIsrael))
{
return(JewishHoliday.SUCCOS);
}
if (dayOfMonth >= 17 && dayOfMonth <= 20 || (dayOfMonth == 16 && inIsrael))
{
return(JewishHoliday.CHOL_HAMOED_SUCCOS);
}
if (dayOfMonth == 21)
{
return(JewishHoliday.HOSHANA_RABBA);
}
if (dayOfMonth == 22)
{
//theoretically this could be simchat torah if in Israel, but shemini atzeret is really the yom tov
return(JewishHoliday.SHEMINI_ATZERES);
}
if (dayOfMonth == 23 && !inIsrael)
{
return(JewishHoliday.SIMCHAS_TORAH);
}
break;
case JewishMonth.KISLEV: // no yomtov in CHESHVAN
// if (dayOfMonth == 24) {
// return EREV_CHANUKAH;
// } else
if (dayOfMonth >= 25)
{
return(JewishHoliday.CHANUKAH);
}
break;
case JewishMonth.TEVES:
if (dayOfMonth == 1 || dayOfMonth == 2 ||
(dayOfMonth == 3 && isAdar29Days))
{
return(JewishHoliday.CHANUKAH);
}
else if (dayOfMonth == 10)
{
return(JewishHoliday.TENTH_OF_TEVES);
}
break;
case JewishMonth.SHEVAT:
if (dayOfMonth == 15)
{
return(JewishHoliday.TU_BESHVAT);
}
break;
case JewishMonth.ADAR:
if (!IsLeapYear(year))
{
// if 13th Adar falls on Friday or Shabbos, push back to Thursday
if (((dayOfMonth == 11 || dayOfMonth == 12) && dayOfWeek == 5) ||
(dayOfMonth == 13 && !(dayOfWeek == 6 || dayOfWeek == 7)))
{
return(JewishHoliday.FAST_OF_ESTHER);
}
if (dayOfMonth == 14)
{
return(JewishHoliday.PURIM);
}
else if (dayOfMonth == 15 && inIsrael)
{
return(JewishHoliday.SHUSHAN_PURIM);
}
}
else
{
// else if a leap year
if (dayOfMonth == 14)
{
return(JewishHoliday.PURIM_KATAN);
}
}
break;
case JewishMonth.ADAR_II:
// if 13th Adar falls on Friday or Shabbos, push back to Thursday
if (((dayOfMonth == 11 || dayOfMonth == 12) && dayOfWeek == 5) ||
(dayOfMonth == 13 && !(dayOfWeek == 6 || dayOfWeek == 7)))
{
return(JewishHoliday.FAST_OF_ESTHER);
}
if (dayOfMonth == 14)
{
return(JewishHoliday.PURIM);
}
else if (dayOfMonth == 15 && inIsrael)
{
return(JewishHoliday.SHUSHAN_PURIM);
}
break;
}
// if we get to this stage, then there are no holidays for the given date return -1
return(JewishHoliday.NONE);
}
/// <summary>
/// Jewishs the month to native month.
/// see https://msdn.microsoft.com/en-us/library/system.globalization.hebrewcalendar(v=vs.110).aspx
/// </summary>
/// <returns>The month to native month.</returns>
/// <param name="jewishMonth">Jewish month.</param>
/// <param name="leapYear">If set to <c>true</c> leap year.</param>
public int JewishMonthToNativeMonth(JewishMonth jewishMonth, bool leapYear)
{
switch (jewishMonth)
{
case JewishMonth.TISHREI:
return(1);
case JewishMonth.CHESHVAN:
return(2);
case JewishMonth.KISLEV:
return(3);
case JewishMonth.TEVES:
return(4);
case JewishMonth.SHEVAT:
return(5);
}
if (leapYear)
{
switch (jewishMonth)
{
case JewishMonth.ADAR:
return(6);
case JewishMonth.ADAR_II:
return(7);
case JewishMonth.NISSAN:
return(8);
case JewishMonth.IYAR:
return(9);
case JewishMonth.SIVAN:
return(10);
case JewishMonth.TAMMUZ:
return(11);
case JewishMonth.AV:
return(12);
case JewishMonth.ELUL:
return(13);
}
}
else
{
switch (jewishMonth)
{
case JewishMonth.ADAR:
return(6);
case JewishMonth.NISSAN:
return(7);
case JewishMonth.IYAR:
return(8);
case JewishMonth.SIVAN:
return(9);
case JewishMonth.TAMMUZ:
return(10);
case JewishMonth.AV:
return(11);
case JewishMonth.ELUL:
return(12);
}
}
return(-1);
}
/// <summary>
/// Gets the jewish days in month.
/// </summary>
/// <returns>The jewish days in month.</returns>
/// <param name="year">Year.</param>
/// <param name="month">Month.</param>
public int GetJewishDaysInMonth(int year, JewishMonth month)
{
int nativeMonth = JewishMonthToNativeMonth(month, IsLeapYear(year));
return(GetDaysInMonth(year, nativeMonth));
}
/// <summary>
/// Gets the jewish days in month.
/// </summary>
/// <returns>The jewish days in month.</returns>
/// <param name="dt">Dt.</param>
/// <param name="month">Month.</param>
public int GetJewishDaysInMonth(DateTime dt, JewishMonth month)
{
return(GetJewishDaysInMonth(GetYear(dt), month));
}
/// <summary>
/// Months the is 29 days / short
/// </summary>
/// <returns><c>true</c>, if is29 days was monthed, <c>false</c> otherwise.</returns>
/// <param name="dt">Dt.</param>
/// <param name="month">Month.</param>
public bool MonthIs29Days(DateTime dt, JewishMonth month)
{
return(GetJewishDaysInMonth(dt, month) == 29 ? true : false);
}
/// <summary>
/// Gets the jewish date time.
/// </summary>
/// <returns>The jewish date time.</returns>
/// <param name="year">Year.</param>
/// <param name="month">Month.</param>
/// <param name="day">Day.</param>
public DateTime GetJewishDateTime(int year, JewishMonth month, int day)
{
return(new DateTime(year, JewishMonthToNativeMonth(month, IsLeapYear(year)), day, this));
}