IsLeapMonth Method (Int32, Int32, Int32)
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JapaneseCalendar.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)

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

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

year is outside the range supported by the calendar.

-or-

month is outside the range supported by the calendar.

-or-

era is outside the range supported by the calendar.

Leap years in the Japanese calendar correspond to the same leap years in the Gregorian calendar. A leap year in the Gregorian calendar is defined as a Gregorian year that is evenly divisible by four, except if it is divisible by 100. However, Gregorian years that are divisible by 400 are leap years. 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 Japanese calendar does not have any leap months.

The following code example calls the IsLeapMonth method 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 JapaneseCalendar.
      Dim myCal As New JapaneseCalendar()

      ' Checks all the months in five years in the current era.
      Dim iMonthsInYear As Integer
      Dim y As Integer
      For y = 1 To 5
         outputBlock.Text += String.Format("{0}:" + ControlChars.Tab, y)
         iMonthsInYear = myCal.GetMonthsInYear(y, JapaneseCalendar.CurrentEra)
         Dim m As Integer
         For m = 1 To iMonthsInYear
            outputBlock.Text += String.Format(ControlChars.Tab + "{0}", myCal.IsLeapMonth(y, m, JapaneseCalendar.CurrentEra))
         Next m
         outputBlock.Text &= vbCrLf
      Next 
   End Sub
End Class 
' This example produces the following output.
'    1:              False   False   False   False   False   False   False   False   False   False   False   False
'    2:              False   False   False   False   False   False   False   False   False   False   False   False
'    3:              False   False   False   False   False   False   False   False   False   False   False   False
'    4:              False   False   False   False   False   False   False   False   False   False   False   False
'    5:              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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