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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
)
public boolean IsLeapDay (
	int year, 
	int month, 
	int day, 
	int era
)
public override function IsLeapDay (
	year : int, 
	month : int, 
	day : int, 
	era : int
) : boolean
Not applicable.

Parameters

year

An integer from 1 through 9378 that represents the year.

month

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

An integer from 1 through 31 that represents the day.

era

An integer from 0 through 1 that represents the era.

Return Value

true if the specified day is a leap day; otherwise, false.

Exception typeCondition

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 field, property, and method members of the PersianCalendar class.

// This example demonstrates the members of the PersianCalendar class.

using System;
using System.Globalization;

class Sample 
{
 public static void Main() 
 {
		//--------------------------------------------------------------------------------
		// Get today's date.
		//--------------------------------------------------------------------------------
 Console.WriteLine("\n................. Today ...........................\n");
 PersianCalendar jc = new PersianCalendar();
 DateTime thisDate = DateTime.Now;

		// Use thisDate twice to display the name of the day and the current date.
 Console.WriteLine("Today is {0:dddd}, {0}", thisDate);
		//--------------------------------------------------------------------------------
		// Fields
		//--------------------------------------------------------------------------------
 Console.WriteLine("\n............... Fields .............................\n");
 Console.WriteLine("PersianEra = {0}", PersianCalendar.PersianEra);
		//--------------------------------------------------------------------------------
		// Properties
		//--------------------------------------------------------------------------------
 Console.WriteLine("\n............... Properties .........................\n");
 Console.Write("Eras:");
 foreach (int era in jc.Eras)
 {
 Console.WriteLine(" era = {0}", era);
 }
		//--------------------------------------------------------------------------------
 Console.WriteLine("MaxSupportedDateTime = {0:G}", jc.MaxSupportedDateTime);
		//--------------------------------------------------------------------------------
 Console.WriteLine("MinSupportedDateTime = {0:G}", jc.MinSupportedDateTime);
		//--------------------------------------------------------------------------------
 Console.WriteLine("TwoDigitYearMax = {0}", jc.TwoDigitYearMax);
		//--------------------------------------------------------------------------------
		// Methods
		//--------------------------------------------------------------------------------
 Console.WriteLine("\n................ Methods ...........................\n");

		// Create a date six months in the future and another date six months in the past.

 Console.WriteLine("AddMonths: thisDate + 6 months = {0}\n" + 
 " thisDate - 6 months = {1}",
 jc.AddMonths(thisDate, 6), jc.AddMonths(thisDate, -6));
		//--------------------------------------------------------------------------------

		// Create a date five years in the future and another date three years in the past.

 Console.WriteLine("AddYears: thisDate + 5 years = {0}\n" + 
 " thisDate - 3 years = {1}",
 jc.AddYears(thisDate, 5), jc.AddYears(thisDate, -3));
		//--------------------------------------------------------------------------------
 Console.WriteLine("GetDayOfMonth: month = {0}", jc.GetDayOfMonth(thisDate));
		//--------------------------------------------------------------------------------
 Console.WriteLine("GetDayOfWeek: day = {0}", jc.GetDayOfWeek(thisDate));
		//--------------------------------------------------------------------------------
 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("GetEra: era = {0}", jc.GetEra(thisDate));
		//--------------------------------------------------------------------------------
 Console.WriteLine("GetLeapMonth: leap month (if any) = {0}", 
 jc.GetLeapMonth(thisDate.Year, PersianCalendar.PersianEra));
		//--------------------------------------------------------------------------------
 Console.WriteLine("GetMonth: month = {0}", jc.GetMonth(thisDate));
		//-------------------------------------------------------------
 Console.WriteLine("GetMonthsInYear: months in a year = {0}", 
 jc.GetMonthsInYear(thisDate.Year, PersianCalendar.PersianEra));
		//--------------------------------------------------------------------------------
 Console.WriteLine("GetYear: year = {0}", jc.GetYear(thisDate));
		//--------------------------------------------------------------------------------
 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));
		//--------------------------------------------------------------------------------
 DateTime dt1 = jc.ToDateTime(1385, 3, 20, 20, 30, 15, 500, 
 PersianCalendar.PersianEra);
 Console.WriteLine("ToDateTime:");
 Console.WriteLine(" Gregorian calendar: {0}\n" +
 " Persian calendar: {1}", dt1, "3/20/1385 8:30:25 PM");
		//--------------------------------------------------------------------------------

		// 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));
 }
}
/*
This code example produces the following results:

................. Today ...........................

Today is Wednesday, 6/14/2006 11:31:13 AM

............... Fields .............................

PersianEra = 1

............... Properties .........................

Eras: era = 1
MaxSupportedDateTime = 12/31/9999 11:59:59 PM
MinSupportedDateTime = 3/21/0622 12:00:00 AM
TwoDigitYearMax = 1410

................ Methods ...........................

AddMonths: thisDate + 6 months = 12/15/2006 11:31:13 AM
 thisDate - 6 months = 12/15/2005 11:31:13 AM
AddYears: thisDate + 5 years = 6/14/2011 11:31:13 AM
 thisDate - 3 years = 6/14/2003 11:31:13 AM
GetDayOfMonth: month = 24
GetDayOfWeek: day = Wednesday
GetDayOfYear: day = 86
GetDaysInMonth: days = 31
GetDaysInYear: days = 366
GetEra: era = 1
GetLeapMonth: leap month (if any) = 0
GetMonth: month = 3
GetMonthsInYear: months in a year = 12
GetYear: year = 1385
IsLeapDay: This is a leap day = False
IsLeapMonth: This is a leap month = False
IsLeapYear: 1370 is a leap year = True
ToDateTime:
 Gregorian calendar: 6/10/2006 8:30:15 PM
 Persian calendar: 3/20/1385 8:30:15 PM
ToFourDigitYear:
 If TwoDigitYearMax = 1410, ToFourDigitYear(99) = 1399
 If TwoDigitYearMax = 2006, ToFourDigitYear(99) = 1999

*/

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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