private static void AddTevesSpecialDays(ArrayList list, int jYear, int jDay)
{
if (JewishDateCalculations.IsShortKislev(jYear))
{
if (jDay == 1)
{
list.Add(new SpecialDay("Chanuka - Six Candles", "'חנוכה - נר ו", SpecialDayTypes.MinorYomtov));
}
else if (jDay == 2)
{
list.Add(new SpecialDay("Chanuka - Seven Candles", "'חנוכה - נר ז", SpecialDayTypes.MinorYomtov));
}
else if (jDay == 3)
{
list.Add(new SpecialDay("Chanuka - Eight Candles", "'חנוכה - נר ח", SpecialDayTypes.MinorYomtov));
}
}
else
{
if (jDay == 1)
{
list.Add(new SpecialDay("Chanuka - Seven Candles", "'חנוכה - נר ז", SpecialDayTypes.MinorYomtov));
}
else if (jDay == 2)
{
list.Add(new SpecialDay("Chanuka - Eight Candles", "'חנוכה - נר ח", SpecialDayTypes.MinorYomtov));
}
}
if (jDay == 10)
{
list.Add(new SpecialDay("Fast - 10th of Teves", "צום עשרה בטבת", SpecialDayTypes.FastDay));
}
}
/// <summary>
/// Sets the current Jewish date to the date represented by the given "Absolute Date" -
/// which is the number of days after/before December 31st, 1 BCE.
/// The logic here was translated from the C code - which in turn were translated
/// from the Lisp code in ''Calendrical Calculations'' by Nachum Dershowitz and Edward M. Reingold in
/// Software---Practice & Experience, vol. 20, no. 9 (September, 1990), pp. 899--928.
/// </summary>
/// <param name="absoluteDate"></param>
private void SetFromAbsoluteDate(int absoluteDate)
{
this._absoluteDate = absoluteDate;
//To save on calculations, start with an estimation of a few years before date
this._year = 3761 + (absoluteDate / (absoluteDate > 0 ? 366 : 300));
//The following is from the original code; it starts the calculations way back when and takes almost as long to calculate all of them...
//this._year = ((absoluteDate + JewishDateCalculations.HEBREW_EPOCH) / 366); // Approximation from below.
// Search forward for year from the approximation.
while (absoluteDate >= JewishDateCalculations.GetAbsoluteFromJewishDate((this._year + 1), 7, 1))
{
this._year++;
}
// Search forward for month from either Tishrei or Nissan.
if (absoluteDate < JewishDateCalculations.GetAbsoluteFromJewishDate(this._year, 1, 1))
{
this._month = 7; // Start at Tishrei
}
else
{
this._month = 1; // Start at Nissan
}
while (absoluteDate > JewishDateCalculations.GetAbsoluteFromJewishDate(
this._year,
this._month,
(JewishDateCalculations.DaysInJewishMonth(this._year, this._month))))
{
this._month++;
}
// Calculate the day by subtraction.
this._day = (absoluteDate - JewishDateCalculations.GetAbsoluteFromJewishDate(this._year, this._month, 1) + 1);
}
/// <summary>
/// Creates a new JewishDate with the specified Hebrew year, month, day and absolute day.
/// Caution: If the absolute day doesn't correctly match the given year/month/day, weird things will happen.
/// </summary>
/// <param name="year">The year - counted from the creation of the world</param>
/// <param name="month">The Jewish month. As it is in the Torah, Nissan is 1.</param>
/// <param name="day">The day of the month</param>
/// <param name="absoluteDay">The "absolute day"</param>
public JewishDate(int year, int month, int day, int absoluteDay)
{
this._year = year;
this._month = month;
this._day = day;
this._absoluteDate = absoluteDay;
this._gregorianDate = JewishDateCalculations.GetGregorianDateFromJewishDate(this);
}
/// <summary>
/// Gets the "proper" name in Hebrew for the given Jewish Month.
/// This means for a leap year, labeling each of the the 2 Adars.
/// </summary>
/// <param name="jYear"></param>
/// <param name="jMonth"></param>
/// <returns></returns>
public static string GetProperMonthNameHeb(int jYear, int jMonth)
{
if (jMonth == 12 && JewishDateCalculations.IsJewishLeapYear(jYear))
{
return("אדר ראשון");
}
else
{
return(JewishMonthNamesHebrew[jMonth]);
}
}
/// <summary>
/// Gets the "proper" name for the given Jewish Month.
/// This means for a leap year, labeling each of the the 2 Adars.
/// </summary>
/// <param name="jYear"></param>
/// <param name="jMonth"></param>
/// <returns></returns>
public static string GetProperMonthName(int jYear, int jMonth)
{
if (jMonth == 12 && JewishDateCalculations.IsJewishLeapYear(jYear))
{
return("Adar Rishon");
}
else
{
return(JewishMonthNamesEnglish[jMonth]);
}
}
/// <summary>
/// Creates a Jewish date that corresponds to the given Gregorian date in the given location. Cut-off time is sunset.
/// </summary>
/// <param name="date">The Gregorian date from which to create the Jewish Date</param>
/// <param name="location">The location. This will be used to determine the time of sunset.</param>
public JewishDate(DateTime date, Location location)
{
int abs = JewishDateCalculations.GetAbsoluteFromGregorianDate(date);
var zman = new Zmanim(date, location);
if (zman.GetShkia() <= date.TimeOfDay)
{
abs++;
}
this.SetFromAbsoluteDate(abs);
this._gregorianDate = date;
this.TimeOfDay = date.TimeOfDay;
}
/// <summary>
/// Adds the given number of years to the current date and returns the new Jewish Date
/// </summary>
/// <param name="years"></param>
/// <returns></returns>
/// <remarks>If the current month is Adar Sheini and the new year is not a leap year, the month is set to Adar.
/// If the current Day is the 30th of Cheshvan or Kislev and in the new year that month only has 29 days,
/// the day is set to the 1st of the following month.
/// </remarks>
public JewishDate AddYears(int years)
{
int year = this._year + years,
month = this._month,
day = this._day;
if (month == 13 && !JewishDateCalculations.IsJewishLeapYear(year))
{
month = 12;
}
else if (month == 8 && day == 30 && !JewishDateCalculations.IsLongCheshvan(year))
{
month = 9;
day = 1;
}
else if (month == 9 && day == 30 && JewishDateCalculations.IsShortKislev(year))
{
month = 10;
day = 1;
}
return(new JewishDate(year, month, day));
}
/// <summary>
/// Adds the given number of months to the current date and returns the new Jewish Date
/// </summary>
/// <param name="months"></param>
/// <returns></returns>
public JewishDate AddMonths(int months)
{
int year = this._year,
month = this._month,
day = this._day,
miy = JewishDateCalculations.MonthsInJewishYear(year);
for (var i = 0; i < Math.Abs(months); i++)
{
if (months > 0)
{
month += 1;
if (month > miy)
{
month = 1;
}
if (month == 7)
{
year += 1;
miy = JewishDateCalculations.MonthsInJewishYear(year);
}
}
else if (months < 0)
{
month -= 1;
if (month == 0)
{
month = miy;
}
if (month == 6)
{
year -= 1;
miy = JewishDateCalculations.MonthsInJewishYear(year);
}
}
}
return(new JewishDate(year, month, day));
}
/// <summary>
/// Gets the difference in months between two JewishDates.
/// If the second date is before this one, the number will be negative.
/// </summary>
/// <param name="jd"></param>
/// <returns></returns>
/// <remarks>Ignores Day part. For example, from 29 Kislev to 1 Teves will
/// return 1 even though they are only a day or two apart</remarks>
public int DateDiffMonth(JewishDate jd)
{
int month = jd._month,
year = jd._year,
months = 0;
while (!(year == this._year && month == this._month))
{
if (this.AbsoluteDate > jd.AbsoluteDate)
{
months--;
month++;
if (month > JewishDateCalculations.MonthsInJewishYear(year))
{
month = 1;
}
else if (month == 7)
{
year++;
}
}
else
{
months++;
month--;
if (month < 1)
{
month = JewishDateCalculations.MonthsInJewishYear(year);
}
else if (month == 6)
{
year--;
}
}
}
return(months);
}
private Sedra(int year, bool inIsrael)
{
//If the last call is within the same year as this one, we reuse the data.
//If memory is an issue, remove these next few lines
if (_lastSedraCalculated != null && _lastSedraCalculated._year == year && _lastSedraCalculated._inIsrael == inIsrael)
{
this._firstSatInYear = _lastSedraCalculated._firstSatInYear;
this._sedraArray = _lastSedraCalculated._sedraArray;
return;
}
//Save the data in case the next call is for the same year
_lastSedraCalculated = this;
bool longCheshvon = JewishDateCalculations.IsLongCheshvan(year);
bool shortKislev = JewishDateCalculations.IsShortKislev(year);
int roshHashana = JewishDateCalculations.GetAbsoluteFromJewishDate(year, 7, 1);
DayOfWeek roshHashanaDOW = (DayOfWeek)Math.Abs(roshHashana % 7);
YearType yearType;
if (longCheshvon && !shortKislev)
{
yearType = YearType.Complete;
}
else if (!longCheshvon && shortKislev)
{
yearType = YearType.Incomplete;
}
else
{
yearType = YearType.Regular;
}
this._year = year;
this._inIsrael = inIsrael;
/* find and save the first shabbos on or after Rosh Hashana */
this._firstSatInYear = GetDayOnOrBefore(6, roshHashana + 6);
if (!JewishDateCalculations.IsJewishLeapYear(year))
{
switch (roshHashanaDOW)
{
case DayOfWeek.Saturday:
if (yearType == YearType.Incomplete)
{
this._sedraArray = shabbos_short;
}
else if (yearType == YearType.Complete)
{
this._sedraArray = shabbos_long;
}
break;
case DayOfWeek.Monday:
if (yearType == YearType.Incomplete)
{
this._sedraArray = mon_short;
}
else if (yearType == YearType.Complete)
{
this._sedraArray = this._inIsrael ? mon_short : mon_long;
}
break;
case DayOfWeek.Tuesday:
if (yearType == YearType.Regular)
{
this._sedraArray = this._inIsrael ? mon_short : mon_long;
}
break;
case DayOfWeek.Thursday:
if (yearType == YearType.Regular)
{
this._sedraArray = this._inIsrael ? thu_normal_Israel : thu_normal;
}
else if (yearType == YearType.Complete)
{
this._sedraArray = thu_long;
}
break;
default:
throw new Exception("improper sedra year type calculated.");
}
}
else /* leap year */
{
switch (roshHashanaDOW)
{
case DayOfWeek.Saturday:
if (yearType == YearType.Incomplete)
{
this._sedraArray = shabbos_short_leap;
}
else if (yearType == YearType.Complete)
{
this._sedraArray = this._inIsrael ? shabbos_short_leap : shabbos_long_leap;
}
break;
case DayOfWeek.Monday:
if (yearType == YearType.Incomplete)
{
this._sedraArray = this._inIsrael ? mon_short_leap_Israel : mon_short_leap;
}
else if (yearType == YearType.Complete)
{
this._sedraArray = this._inIsrael ? mon_long_leap_Israel : mon_long_leap;
}
break;
case DayOfWeek.Tuesday:
if (yearType == YearType.Regular)
{
this._sedraArray = this._inIsrael ? mon_long_leap_Israel : mon_long_leap;
}
break;
case DayOfWeek.Thursday:
if (yearType == YearType.Incomplete)
{
this._sedraArray = thu_short_leap;
}
else if (yearType == YearType.Complete)
{
this._sedraArray = thu_long_leap;
}
break;
default:
throw new Exception("improper sedra year type calculated.");
}
}
}
/// <summary>
/// Creates a Hebrew date from the "absolute date".
/// In other words, the Hebrew date on the day that is the given number of days after/before December 31st, 1 BCE
/// </summary>
/// <param name="absoluteDate">The number of days elapsed since the theoretical Gregorian date Sunday, December 31, 1 BCE.
/// Since there is no year 0 in the calendar, the year following 1 BCE is 1 CE.
/// So, the Gregorian date January 1, 1 CE is absolute date number 1.</param>
public JewishDate(int absoluteDate)
{
this.SetFromAbsoluteDate(absoluteDate);
this._gregorianDate = JewishDateCalculations.GetGregorianDateFromJewishDate(this);
}
/// <summary>
/// Creates a Jewish date that corresponds to the given Gregorian date
/// </summary>
/// <param name="date">The Gregorian date from which to create the Jewish Date</param>
public JewishDate(DateTime date)
{
this.SetFromAbsoluteDate(JewishDateCalculations.GetAbsoluteFromGregorianDate(date));
this._gregorianDate = date;
this.TimeOfDay = date.TimeOfDay;
}
/// <summary>
/// Creates a new JewishDate with the specified Hebrew year, month and day
/// </summary>
/// <param name="year">The year - counted from the creation of the world</param>
/// <param name="month">The Jewish month. As it is in the Torah, Nissan is 1.</param>
/// <param name="day">The day of the month</param>
public JewishDate(int year, int month, int day) :
this(year, month, day, JewishDateCalculations.GetAbsoluteFromJewishDate(year, month, day))
{
}
/// <summary>
/// Returns true if the given day is a special day or a fast day,
/// but not Shabbos or a major Yom Tov in the given location.
/// </summary>
/// <param name="jd"></param>
/// <param name="location"></param>
/// <returns></returns>
public static bool IsMinorYomTovOrFast(JewishDate jd, Location location)
{
DayOfWeek dow = jd.DayOfWeek;
int day = jd.Day,
month = jd.Month,
year = jd.Year;
if (dow == DayOfWeek.Saturday || IsMajorYomTov(jd, location))
{
return(false);
}
if (day.In(30, 1))
{
return(true);
}
switch (month)
{
case 1:
return(day == 14);
case 2:
return(day.In(14, 18));
case 4:
return((day == 17 && dow != DayOfWeek.Saturday) ||
(day == 18 && dow == DayOfWeek.Sunday));
case 5:
return((day == 9 && dow != DayOfWeek.Saturday) ||
(day == 10 && dow == DayOfWeek.Sunday) ||
day == 15);
case 6:
return(day == 29);
case 7:
return(((day == 3 && dow != DayOfWeek.Saturday) ||
(day == 4 && dow == DayOfWeek.Sunday)) ||
day == 9);
case 9:
return(day > 24);
case 10:
if (day < 4)
{
return(JewishDateCalculations.IsShortKislev(year) || (day < 3));
}
else
{
return(day == 10);
}
case 11:
return(day == 15);
case 12:
case 13:
if (month == 12 && JewishDateCalculations.IsJewishLeapYear(year))
{
return(day.In(14, 15));
}
else
{
return
((day == 11 && dow == DayOfWeek.Thursday) ||
(day == 13 && dow != DayOfWeek.Saturday) ||
(day.In(14, 15)));
}
default:
return(false);
}
}
/// <summary>
/// Gets a list of special days and information about the given Jewish Date
/// </summary>
/// <param name="jDate"></param>
/// <param name="inIsrael"></param>
/// <returns></returns>
/// <remarks>We use an ArrayList rather than a generic List to accommodate
/// the .NET Micro framework which does not support generic lists.
/// For regular projects just use as follows: GetHolidays(jDate, inIsrael).Cast<JewishCalendar.SpecialDay>()
/// </remarks>
public static ArrayList GetHolidays(JewishDate jDate, bool inIsrael)
{
var list = new ArrayList();
int jYear = jDate.Year;
int jMonth = jDate.Month;
int jDay = jDate.Day;
DayOfWeek dayOfWeek = jDate.DayOfWeek;
bool isLeapYear = JewishDateCalculations.IsJewishLeapYear(jYear);
DateTime secDate = jDate.GregorianDate;
if (dayOfWeek == DayOfWeek.Friday)
{
list.Add(new SpecialDay("Erev Shabbos", "ערב שבת",
SpecialDayTypes.Information | SpecialDayTypes.HasCandleLighting));
}
else if (dayOfWeek == DayOfWeek.Saturday)
{
AddShabbosSpecialDays(jDate, inIsrael, list, isLeapYear);
}
AddRoshChodeshSpecialDays(list, jYear, jMonth, jDay, isLeapYear);
//V'sain Tal U'Matar in Chutz La'aretz is according to the secular date
if (secDate.Month == 12 && secDate.Day.In(5, 6) && !inIsrael)
{
bool nextYearIsLeap = JewishDateCalculations.IsJewishLeapYear(jYear + 1);
if (((secDate.Day == 5 && !nextYearIsLeap)) || (secDate.Day == 6 && nextYearIsLeap))
{
list.Add(new SpecialDay("V'sain Tal U'Matar", "ותן טל ומטר"));
}
}
switch (jMonth)
{
case 1: //Nissan
AddNissanSpecialDays(inIsrael, list, jDay, dayOfWeek);
break;
case 2: //Iyar
AddIyarSpecialDays(list, jDay, dayOfWeek);
break;
case 3: //Sivan
AddSivanSpecialDays(inIsrael, list, jDay, dayOfWeek);
break;
case 4: //Tamuz
AddTamuzSpecialDays(list, jDay, dayOfWeek);
break;
case 5: //Av
AddAvSpecialDays(list, jDay, dayOfWeek);
break;
case 6: //Ellul
AddEllulSpecialDays(list, jDay, dayOfWeek);
break;
case 7: //Tishrei
AddTishreiSpecialDays(inIsrael, list, jDay, dayOfWeek);
break;
case 8: //Cheshvan
AddCheshvanSpecialDays(inIsrael, list, jDay, dayOfWeek);
break;
case 9: //Kislev
AddKislevSpecialDays(list, jDay);
break;
case 10: //Teves
AddTevesSpecialDays(list, jYear, jDay);
break;
case 11: //Shvat
AddShvatSpecialDays(list, jDay);
break;
case 12: //Adars
case 13:
AddAdarSpecialDays(list, jMonth, jDay, dayOfWeek, isLeapYear);
break;
}
if ((jMonth == 1 && jDay > 15) || jMonth == 2 || (jMonth == 3 && jDay < 6))
{
int dayOfSefirah = jDate.GetDayOfOmer();
if (dayOfSefirah > 0)
{
list.Add(new SpecialDay("Sefiras Ha'omer - Day " + dayOfSefirah.ToString(), "ספירת העומר - יום " + dayOfSefirah.ToString()));
}
}
//Remove any candle lighting added by a YomTov from Shabbos....
if (dayOfWeek == DayOfWeek.Saturday)
{
foreach (SpecialDay sd in list)
{
if (sd.DayType.IsSpecialDayType(SpecialDayTypes.HasCandleLighting))
{
sd.DayType = (SpecialDayTypes)(sd.DayType - SpecialDayTypes.HasCandleLighting);
}
}
}
return(list);
}
