HijriCalendar
Class
Definition
Represents the Hijri calendar.
[System.Runtime.InteropServices.ComVisible(true)]
public class HijriCalendar : System.Globalization.Calendar
- Inheritance
- Attributes
Inherited Members
System.Globalization.Calendar
System.Object
Remarks
The Hijri calendar recognizes one era: A.H. (Latin "Anno Hegirae", which means "the year of the migration," in reference to the migration of Muhammad (PBUH) from Mecca).
Note
For information about using the HijriCalendar class and the other calendar classes in the .NET Framework, see Working with Calendars.
In every 30-year cycle that ends with a year that is evenly divisible by 30, the 2nd, 5th, 7th, 10th, 13th, 16th, 18th, 21st, 24th, 26th, and 29th years are leap years. A common year has 354 days and a leap year has 355 days.
The Hijri calendar has 12 months with 29 to 30 days each:
| GetMonth value | Month | Days in common years | Days in leap years |
|---|---|---|---|
| 1 | محرم (Muharram) | 30 | 30 |
| 2 | صفر (Safar) | 29 | 29 |
| 3 | ربيع الاول (Rabi I) | 30 | 30 |
| 4 | ربيع الثاني (Rabi II) | 29 | 29 |
| 5 | جمادى الاولى (Jumada I) | 30 | 30 |
| 6 | جمادى الثانية (Jumada II) | 29 | 29 |
| 7 | رجب (Rajab) | 30 | 30 |
| 8 | شعبان (Shaban) | 29 | 29 |
| 9 | رمضان (Ramadan) | 30 | 30 |
| 10 | شوال (Shawwal) | 29 | 29 |
| 11 | ذو القعدة (Zulkadah) | 30 | 30 |
| 12 | ذو الحجة (Zulhijjah) | 29 | 30 |
Ramadan, the month of fasting in the Muslim world, officially starts and ends according to a decree that is based on the observation of the new moon. Therefore, the number of days in Shaban and the number of days in Ramadan vary.
The date January 1, 2001 A.D. in the Gregorian calendar is roughly equivalent to the sixth day of Shawwal in the year 1421 A.H. in the Hijri calendar.
This implementation of the HijriCalendar class adjusts the calendar date by adding or subtracting a value from zero to two days to accommodate the variances in the start and the end of Ramadan and to accommodate the date difference between countries/regions. That value is stored in the HijriAdjustment property. If HijriAdjustment is not set explicitly, it derives its value from the settings in the regional and language options portion of Control Panel and is stored in the registry value HKEY_CURRENT_USER\Control Panel\International\AddHijriDate. However, that information can change during the life of the AppDomain. The HijriCalendar class does not detect changes in the system settings automatically.
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
| HijriCalendar() |
Initializes a new instance of the HijriCalendar class. |
Fields
| HijriEra |
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. |
| DaysInYearBeforeMinSupportedYear |
Gets the number of days in the year that precedes the year that is specified by the MinSupportedDateTime property. |
| Eras |
Gets the list of eras in the HijriCalendar. |
| HijriAdjustment |
Gets or sets the number of days to add or subtract from the calendar to accommodate the variances in the start and the end of Ramadan and to accommodate the date difference between countries/regions. |
| MaxSupportedDateTime |
Gets the latest date and time supported by this calendar. |
| MinSupportedDateTime |
Gets the earliest date and time supported by this calendar. |
| 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 of the specified year and era. |
| GetDaysInYear(Int32, Int32) |
Returns the number of days in the specified year and 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 and era. |
| GetYear(DateTime) |
Returns the year in the specified DateTime. |
| IsLeapDay(Int32, Int32, Int32, Int32) |
Determines whether the specified date is a leap day. |
| IsLeapMonth(Int32, Int32, Int32) |
Determines whether the specified month in the specified year and 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, time, and era. |
| ToFourDigitYear(Int32) |
Converts the specified year to a four-digit year by using the TwoDigitYearMax property to determine the appropriate century. |