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GregorianCalendar.IsLeapMonth Method (Int32, Int32, Int32)

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

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

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

public override bool IsLeapMonth(
	int year,
	int month,
	int era
)

Parameters

year
Type: System.Int32
An integer that represents the year.
month
Type: System.Int32
An integer from 1 to 12 that represents the month.
era
Type: System.Int32
An integer that represents the era.

Return Value

Type: System.Boolean
This method always returns false, unless overridden by a derived class.

ExceptionCondition
ArgumentOutOfRangeException

era is outside the range supported by the calendar.

-or-

year is outside the range supported by the calendar.

-or-

month is outside the range supported by the calendar.

A leap year in the Gregorian calendar is defined as a year that is evenly divisible by four, except if it is divisible by 100. However, years that are divisible by 400 are leap years. For example, the year 1900 was not a leap year, but the year 2000 was. A common year has 365 days and a leap year has 366 days.

A leap month is an entire month that occurs only in a leap year. The Gregorian calendar does not have any leap months.

The following code example calls IsLeapMonth for all the months in five years in the current era.


using System;
using System.Globalization;


public class Example
{

   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {

      // Creates and initializes a GregorianCalendar.
      GregorianCalendar myCal = new GregorianCalendar();

      // Checks all the months in five years in the current era.
      int iMonthsInYear;
      for (int y = 2001; y <= 2005; y++)
      {
         outputBlock.Text += String.Format("{0}:\t", y);
         iMonthsInYear = myCal.GetMonthsInYear(y, GregorianCalendar.CurrentEra);
         for (int m = 1; m <= iMonthsInYear; m++)
            outputBlock.Text += String.Format("\t{0}", myCal.IsLeapMonth(y, m, GregorianCalendar.CurrentEra));
         outputBlock.Text += "\n";
      }

   }

}

/*
This code produces the following output.

2001:           False   False   False   False   False   False   False   False   False   False   False   False
2002:           False   False   False   False   False   False   False   False   False   False   False   False
2003:           False   False   False   False   False   False   False   False   False   False   False   False
2004:           False   False   False   False   False   False   False   False   False   False   False   False
2005:           False   False   False   False   False   False   False   False   False   False   False   False

*/


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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