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PersianCalendar.IsLeapDay Method (Int32, Int32, Int32, Int32)

Determines whether the specified date is a leap day.

Namespace:  System.Globalization
Assembly:  mscorlib (in mscorlib.dll)

public override bool IsLeapDay(
	int year,
	int month,
	int day,
	int era
)

Parameters

year
Type: System.Int32

An integer from 1 through 9378 that represents the year.

month
Type: System.Int32

An integer that represents the month and ranges from 1 through 12 if year is not 9378, or 1 through 10 if year is 9378.

day
Type: System.Int32

An integer from 1 through 31 that represents the day.

era
Type: System.Int32

An integer from 0 through 1 that represents the era.

Return Value

Type: System.Boolean
true if the specified day is a leap day; otherwise, false.

ExceptionCondition
ArgumentOutOfRangeException

year, month, day, or era is outside the range supported by this calendar.

A leap day is a day that occurs only in a leap year.

The following code example demonstrates the use of the IsLeapDay method.

using System;
using System.Globalization;

class Sample 
{
    public static void Main() 
    {
      PersianCalendar jc = new PersianCalendar();
      DateTime thisDate = DateTime.Now;

		//-------------------------------------------------------------------------------- 
		// Properties 
		//--------------------------------------------------------------------------------
      Console.WriteLine("\n........... Selected Properties .....................\n");
      Console.Write("Eras:");
      foreach (int era in jc.Eras)
      {
         Console.WriteLine(" era = {0}", era);
      }
		//--------------------------------------------------------------------------------
      Console.WriteLine("\nTwoDigitYearMax = {0}", jc.TwoDigitYearMax);
		//-------------------------------------------------------------------------------- 
		// Methods 
		//--------------------------------------------------------------------------------
      Console.WriteLine("\n............ Selected Methods .......................\n");

		//--------------------------------------------------------------------------------
      Console.WriteLine("GetDayOfYear: day = {0}", jc.GetDayOfYear(thisDate));
		//--------------------------------------------------------------------------------
      Console.WriteLine("GetDaysInMonth: days = {0}", 
                        jc.GetDaysInMonth( thisDate.Year, thisDate.Month, 
                        PersianCalendar.PersianEra));
		//--------------------------------------------------------------------------------
      Console.WriteLine("GetDaysInYear: days = {0}", 
                        jc.GetDaysInYear(thisDate.Year, PersianCalendar.PersianEra));
		//--------------------------------------------------------------------------------
      Console.WriteLine("GetLeapMonth: leap month (if any) = {0}", 
                        jc.GetLeapMonth(thisDate.Year, PersianCalendar.PersianEra));
		//-------------------------------------------------------------
      Console.WriteLine("GetMonthsInYear: months in a year = {0}", 
                        jc.GetMonthsInYear(thisDate.Year, PersianCalendar.PersianEra));
		//--------------------------------------------------------------------------------
      Console.WriteLine("IsLeapDay: This is a leap day = {0}", 
                        jc.IsLeapDay(thisDate.Year, thisDate.Month, thisDate.Day, 
                        PersianCalendar.PersianEra));
		//--------------------------------------------------------------------------------
      Console.WriteLine("IsLeapMonth: This is a leap month = {0}", 
                        jc.IsLeapMonth(thisDate.Year, thisDate.Month, 
                        PersianCalendar.PersianEra));
		//--------------------------------------------------------------------------------
      Console.WriteLine("IsLeapYear: 1370 is a leap year = {0}", 
                        jc.IsLeapYear(1370, PersianCalendar.PersianEra));
		//-------------------------------------------------------------------------------- 

		// Get the 4-digit year for a year whose last two digits are 99. The 4-digit year  
		// depends on the current value of the TwoDigitYearMax property.

      Console.WriteLine("ToFourDigitYear:");
      Console.WriteLine("  If TwoDigitYearMax = {0}, ToFourDigitYear(99) = {1}", 
                         jc.TwoDigitYearMax, jc.ToFourDigitYear(99));
      jc.TwoDigitYearMax = thisDate.Year;
      Console.WriteLine("  If TwoDigitYearMax = {0}, ToFourDigitYear(99) = {1}", 
                        jc.TwoDigitYearMax, jc.ToFourDigitYear(99));
    }
}
// The example displays the following output: 
//       ........... Selected Properties ..................... 
//        
//       Eras: era = 1 
//        
//       TwoDigitYearMax = 99 
//        
//       ............ Selected Methods ....................... 
//        
//       GetDayOfYear: day = 1 
//       GetDaysInMonth: days = 31 
//       GetDaysInYear: days = 365 
//       GetLeapMonth: leap month (if any) = 0 
//       GetMonthsInYear: months in a year = 12 
//       IsLeapDay: This is a leap day = False 
//       IsLeapMonth: This is a leap month = False 
//       IsLeapYear: 1370 is a leap year = True 
//       ToFourDigitYear: 
//         If TwoDigitYearMax = 99, ToFourDigitYear(99) = 99 
//         If TwoDigitYearMax = 2012, ToFourDigitYear(99) = 1999

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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