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HijriCalendar.IsLeapMonth Method (Int32, Int32, Int32)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

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

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

Syntax

'Declaration
Public Overrides Function IsLeapMonth ( _
    year As Integer, _
    month As Integer, _
    era As Integer _
) As Boolean
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.

Exceptions

Exception Condition
ArgumentOutOfRangeException

era is outside the range supported by this calendar.

-or-

year is outside the range supported by this calendar.

-or-

month is outside the range supported by this calendar.

Remarks

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.

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

Examples

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

Imports System.Globalization

Public Class Example
   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      ' Creates and initializes a HijriCalendar.
      Dim myCal As New HijriCalendar()

      ' Checks all the months in five years in the current era.
      Dim iMonthsInYear As Integer
      Dim y As Integer
      For y = 1421 To 1425
         outputBlock.Text += String.Format("{0}:" + ControlChars.Tab, y)
         iMonthsInYear = myCal.GetMonthsInYear(y, HijriCalendar.CurrentEra)
         Dim m As Integer
         For m = 1 To iMonthsInYear
            outputBlock.Text += String.Format(ControlChars.Tab + "{0}", myCal.IsLeapMonth(y, m, HijriCalendar.CurrentEra))
         Next m
         outputBlock.Text &= vbCrLf
      Next y
   End Sub 
End Class 
'This code produces the following output.
'    1421:           False   False   False   False   False   False   False   False   False   False   False   False
'    1422:           False   False   False   False   False   False   False   False   False   False   False   False
'    1423:           False   False   False   False   False   False   False   False   False   False   False   False
'    1424:           False   False   False   False   False   False   False   False   False   False   False   False
'    1425:           False   False   False   False   False   False   False   False   False   False   False   False
using System;
using System.Globalization;


public class Example
{

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

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

      // Checks all the months in five years in the current era.
      int iMonthsInYear;
      for (int y = 1421; y <= 1425; y++)
      {
         outputBlock.Text += String.Format("{0}:\t", y);
         iMonthsInYear = myCal.GetMonthsInYear(y, HijriCalendar.CurrentEra);
         for (int m = 1; m <= iMonthsInYear; m++)
            outputBlock.Text += String.Format("\t{0}", myCal.IsLeapMonth(y, m, HijriCalendar.CurrentEra));
         outputBlock.Text += "\n";
      }

   }

}

/*
This code produces the following output.

1421:           False   False   False   False   False   False   False   False   False   False   False   False
1422:           False   False   False   False   False   False   False   False   False   False   False   False
1423:           False   False   False   False   False   False   False   False   False   False   False   False
1424:           False   False   False   False   False   False   False   False   False   False   False   False
1425:           False   False   False   False   False   False   False   False   False   False   False   False

*/

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.