HebrewCalendar Class

Definition

Represents the Hebrew calendar.

[System.Runtime.InteropServices.ComVisible(true)]
public class HebrewCalendar : System.Globalization.Calendar
Inheritance
HebrewCalendar
Attributes

Inherited Members

System.Globalization.Calendar

System.Object

Examples

The following example creates a file that contains the date ranges supported by the HebrewCalendar class, and displays the number of days in each month of the year 5772.

using System;
using System.Globalization;
using System.IO;
using System.Threading;

public class Example
{
   public static void Main()
   {
      StreamWriter output = new StreamWriter("HebrewCalendarInfo.txt");
      
      // Make the Hebrew Calendar the current calendar and
      // Hebrew (Israel) the current thread culture.
      HebrewCalendar hc = new HebrewCalendar();
      CultureInfo culture = CultureInfo.CreateSpecificCulture("he-IL");
      culture.DateTimeFormat.Calendar = hc;
      Thread.CurrentThread.CurrentCulture = culture;
      
      output.WriteLine("{0} Information:\n", 
                       GetCalendarName(culture.DateTimeFormat.Calendar));
      
      // Get the calendar range expressed in both Hebrew calendar and
      // Gregorian calendar dates.
      output.WriteLine("Start Date: {0} ", hc.MinSupportedDateTime);  
      culture.DateTimeFormat.Calendar = culture.Calendar;
      output.WriteLine("            ({0} Gregorian)\n", 
                       hc.MinSupportedDateTime);
      
      culture.DateTimeFormat.Calendar = hc;
      output.WriteLine("End Date: {0} ", hc.MaxSupportedDateTime);
      culture.DateTimeFormat.Calendar = culture.Calendar;
      output.WriteLine("          ({0} Gregorian)\n", 
                       hc.MaxSupportedDateTime);  
      
      culture.DateTimeFormat.Calendar = hc;
      
      // Get the year in the Hebrew calendar that corresponds to 1/1/2012
      // and display information about it.
      DateTime startOfYear = new DateTime(2012, 1, 1);
      output.WriteLine("Days in the Year {0}: {1}\n", 
                       hc.GetYear(startOfYear), 
                       hc.GetDaysInYear(hc.GetYear(startOfYear)));
      
      output.WriteLine("Days in Each Month of {0}:\n", hc.GetYear(startOfYear));
      output.WriteLine("Month       Days       Month Name");
      // Change start of year to first day of first month 
      startOfYear = hc.ToDateTime(hc.GetYear(startOfYear), 1, 1, 0, 0, 0, 0);
      DateTime startOfMonth = startOfYear;
      for (int ctr = 1; ctr <= hc.GetMonthsInYear(hc.GetYear(startOfYear)); ctr++) { 
         output.Write(" {0,2}", ctr);
         output.WriteLine("{0,12}{1,15:MMM}", 
                          hc.GetDaysInMonth(hc.GetYear(startOfMonth), hc.GetMonth(startOfMonth)),
                          startOfMonth);  
         startOfMonth = hc.AddMonths(startOfMonth, 1);                 
      } 
                                     
      output.Close();          
   }

   private static string GetCalendarName(Calendar cal) 
   {
      return cal.ToString().Replace("System.Globalization.", "").Replace("Cal", " Cal");
   }
}
// The example displays the following output:
//       Hebrew Calendar Information:
//       
//       Start Date: ז// טבת שמ"ג 00:00:00 
//                   (01/01/1583 00:00:00 Gregorian)
//       
//       End Date: כ"ט אלול תתקצ"ט 23:59:59 
//                 (29/09/2239 23:59:59 Gregorian)
//       
//       Days in the Year 5772: 354
//       
//       Days in Each Month of 5772:
//       
//       Month       Days       Month Name
//         1          30           תשרי
//         2          29           חשון
//         3          30           כסלו
//         4          29            טבת
//         5          30            שבט
//         6          29            אדר
//         7          30           ניסן
//         8          29           אייר
//         9          30           סיון
//        10          29           תמוז
//        11          30             אב
//        12          29           אלול
Imports System.Globalization
Imports System.IO
Imports System.Threading

Module Example
   Public Sub Main()
      Dim output As New StreamWriter("HebrewCalendarInfo.txt")
      
      ' Make the Hebrew Calendar the current calendar and
      ' Hebrew (Israel) the current thread culture.
      Dim hc As New HebrewCalendar()
      Dim culture As CultureInfo = CultureInfo.CreateSpecificCulture("he-IL")
      culture.DateTimeFormat.Calendar = hc
      Thread.CurrentThread.CurrentCulture = culture
      
      output.WriteLine("{0} Information:", 
                       GetCalendarName(culture.DateTimeFormat.Calendar))
      output.WriteLine()
      
      ' Get the calendar range expressed in both Hebrew calendar and
      ' Gregorian calendar dates.
      output.WriteLine("Start Date: {0} ", 
                       hc.MinSupportedDateTime)  
      culture.DateTimeFormat.Calendar = culture.Calendar
      output.WriteLine("            ({0} Gregorian)", 
                       hc.MinSupportedDateTime)
      output.WriteLine()
      
      culture.DateTimeFormat.Calendar = hc
      output.WriteLine("End Date: {0} ", 
                   hc.MaxSupportedDateTime)
      culture.DateTimeFormat.Calendar = culture.Calendar
      output.WriteLine("          ({0} Gregorian)", 
                       hc.MaxSupportedDateTime)  
      output.WriteLine()
      
      culture.DateTimeFormat.Calendar = hc
      
      ' Get the year in the Hebrew calendar that corresponds to 1/1/2012
      ' and display information about it.
      Dim startOfYear As Date = #1/1/2012#
      output.WriteLine("Days in the Year {0}: {1}", 
                       hc.GetYear(startOfYear), 
                       hc.GetDaysInYear(hc.GetYear(startOfYear)))
      output.WriteLine()
      
      output.WriteLine("Days in Each Month of {0}:", hc.GetYear(startOfYear))
      output.WriteLine()
      output.WriteLine("Month       Days       Month Name")
      ' Change start of year to first day of first month 
      startOfYear = hc.ToDateTime(hc.GetYear(startOfYear), 1, 1, 0, 0, 0, 0)
      Dim startOfMonth As Date = startOfYear
      For ctr As Integer = 1 To hc.GetMonthsInYear(hc.GetYear(startOfYear)) 
         output.Write(" {0,2}", ctr)
         output.WriteLine("{0,12}{1,15:MMM}", 
                          hc.GetDaysInMonth(hc.GetYear(startOfMonth), hc.GetMonth(startOfMonth)),
                          startOfMonth)  
         startOfMonth = hc.AddMonths(startOfMonth, 1)                 
      Next 
                                     
      output.Close()          
   End Sub
   
   Private Function GetCalendarName(cal As Calendar) As String
      Return cal.ToString().Replace("System.Globalization.", "").Replace("Cal", " Cal")
   End Function
End Module
' The example displays the following output:
'       Hebrew Calendar Information:
'       
'       Start Date: ז' טבת שמ"ג 00:00:00 
'                   (01/01/1583 00:00:00 Gregorian)
'       
'       End Date: כ"ט אלול תתקצ"ט 23:59:59 
'                 (29/09/2239 23:59:59 Gregorian)
'       
'       Days in the Year 5772: 354
'       
'       Days in Each Month of 5772:
'       
'       Month       Days       Month Name
'         1          30           תשרי
'         2          29           חשון
'         3          30           כסלו
'         4          29            טבת
'         5          30            שבט
'         6          29            אדר
'         7          30           ניסן
'         8          29           אייר
'         9          30           סיון
'        10          29           תמוז
'        11          30             אב
'        12          29           אלול

The example instantiates a HebrewCalendar object and makes it the current calendar of a Hebrew (Israel) CultureInfo object. It then makes Hebrew (Israel) the current thread culture. This causes the common language runtime to interpret all dates and times in relation to the Hebrew calendar.

Remarks

The Hebrew calendar recognizes two eras: B.C.E. (before the common era) and A.M. (Latin "Anno Mundi", which means "the year of the world"). This implementation of the HebrewCalendar class recognizes only the current era (A.M.) and the Hebrew years 5343 to 5999 (1583 to 2239 in the Gregorian calendar).

Note

For information about using the HebrewCalendar class and the other calendar classes in the .NET Framework, see Working with Calendars.

In every 19-year cycle that ends with a year that is evenly divisible by 19, the 3rd, 6th, 8th, 11th, 14th, 17th, and 19th years are leap years. A common year can have from 353 to 355 days, depending on the placement of Jewish holidays. A leap year can have from 383 to 385 days.

The Hebrew calendar has 12 months during common years and 13 months during leap years:

GetMonth value (common year) GetMonth value (leap year) Month Days in common years Days in leap years
1 1 תשרי (Tishrei) 30 30
2 2 חשון (Cheshvan) 29/30 29/30
3 3 כסלו (Kislev) 29/30 29/30
4 4 טבת (Tevet) 29 29
5 5 שבט (Shevat) 30 30
6 - אדר (Adar) 29 -
- 6 אדר א (Adar Alef) - 30
- 7 אדר ב (Adar Beit) - 29
7 8 ניסן (Nissan) 30 30
8 9 אייר (Iyar) 29 29
9 10 סיון (Sivan) 30 30
10 11 תמוז (Tamuz) 29 29
11 12 אב (Av) 30 30
12 13 אלול (Elul) 29 29

The days in Cheshvan and Kislev vary depending on the placement of Jewish holidays. During leap years, Adar is replaced by Adar Alef with 30 days and Adar Beit with 29 days. Adar Alef is considered the leap month. The last day of Adar Alef and all the days in Adar Beit are considered leap days; that is, the IsLeapDay method returns true for these days.

The date January 1, 2001 A.D. in the Gregorian calendar is equivalent to the sixth day of Tevet in the year 5761 A.M. in the Hebrew calendar.

Each CultureInfo supports a set of calendars. The Calendar property returns the default calendar for the culture, and the OptionalCalendars property returns an array containing all the calendars supported by the culture. To change the calendar used by a CultureInfo, the application should set the Calendar property of CultureInfo.DateTimeFormat to a new Calendar.

Constructors

HebrewCalendar()

Initializes a new instance of the HebrewCalendar class.

Fields

HebrewEra

Represents the current era. This field is constant.

Properties

AlgorithmType

Gets a value that indicates whether the current calendar is solar-based, lunar-based, or a combination of both.

Eras

Gets the list of eras in the HebrewCalendar.

MaxSupportedDateTime

Gets the latest date and time supported by the HebrewCalendar type.

MinSupportedDateTime

Gets the earliest date and time supported by the HebrewCalendar type.

TwoDigitYearMax

Gets or sets the last year of a 100-year range that can be represented by a 2-digit year.

Methods

AddMonths(DateTime, Int32)

Returns a DateTime that is the specified number of months away from the specified DateTime.

AddYears(DateTime, Int32)

Returns a DateTime that is the specified number of years away from the specified DateTime.

GetDayOfMonth(DateTime)

Returns the day of the month in the specified DateTime.

GetDayOfWeek(DateTime)

Returns the day of the week in the specified DateTime.

GetDayOfYear(DateTime)

Returns the day of the year in the specified DateTime.

GetDaysInMonth(Int32, Int32, Int32)

Returns the number of days in the specified month in the specified year in the specified era.

GetDaysInYear(Int32, Int32)

Returns the number of days in the specified year in the specified era.

GetEra(DateTime)

Returns the era in the specified DateTime.

GetLeapMonth(Int32, Int32)

Calculates the leap month for a specified year and era.

GetMonth(DateTime)

Returns the month in the specified DateTime.

GetMonthsInYear(Int32, Int32)

Returns the number of months in the specified year in the specified era.

GetYear(DateTime)

Returns the year in the specified DateTime value.

IsLeapDay(Int32, Int32, Int32, Int32)

Determines whether the specified date in the specified era is a leap day.

IsLeapMonth(Int32, Int32, Int32)

Determines whether the specified month in the specified year in the specified era is a leap month.

IsLeapYear(Int32, Int32)

Determines whether the specified year in the specified era is a leap year.

ToDateTime(Int32, Int32, Int32, Int32, Int32, Int32, Int32, Int32)

Returns a DateTime that is set to the specified date and time in the specified era.

ToFourDigitYear(Int32)

Converts the specified year to a 4-digit year by using the TwoDigitYearMax property to determine the appropriate century.