GregorianCalendar.IsLeapMonth(Int32, Int32, Int32) Method
Important
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Determines whether the specified month in the specified year in the specified era is a leap month.
public:
override bool IsLeapMonth(int year, int month, int era);
public override bool IsLeapMonth (int year, int month, int era);
override this.IsLeapMonth : int * int * int -> bool
Public Overrides Function IsLeapMonth (year As Integer, month As Integer, era As Integer) As Boolean
- year
- Int32
An integer that represents the year.
- month
- Int32
An integer from 1 to 12 that represents the month.
- era
- Int32
An integer that represents the era.
This method always returns false
, unless overridden by a derived class.
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.
The following code example calls IsLeapMonth for all the months in five years in the current era.
using namespace System;
using namespace System::Globalization;
int main()
{
// Creates and initializes a GregorianCalendar.
GregorianCalendar^ myCal = gcnew GregorianCalendar;
// Checks all the months in five years in the current era.
int iMonthsInYear;
for ( int y = 2001; y <= 2005; y++ )
{
Console::Write( " {0}:\t", y );
iMonthsInYear = myCal->GetMonthsInYear( y, GregorianCalendar::CurrentEra );
for ( int m = 1; m <= iMonthsInYear; m++ )
Console::Write( "\t {0}", myCal->IsLeapMonth( y, m, GregorianCalendar::CurrentEra ) );
Console::WriteLine();
}
}
/*
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
*/
using System;
using System.Globalization;
public class SamplesGregorianCalendar {
public static void Main() {
// 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++ ) {
Console.Write( "{0}:\t", y );
iMonthsInYear = myCal.GetMonthsInYear( y, GregorianCalendar.CurrentEra );
for ( int m = 1; m <= iMonthsInYear; m++ )
Console.Write( "\t{0}", myCal.IsLeapMonth( y, m, GregorianCalendar.CurrentEra ) );
Console.WriteLine();
}
}
}
/*
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
*/
Imports System.Globalization
Public Class SamplesGregorianCalendar
Public Shared Sub Main()
' Creates and initializes a GregorianCalendar.
Dim myCal As New GregorianCalendar()
' Checks all the months in five years in the current era.
Dim iMonthsInYear As Integer
Dim y As Integer
For y = 2001 To 2005
Console.Write("{0}:" + ControlChars.Tab, y)
iMonthsInYear = myCal.GetMonthsInYear(y, GregorianCalendar.CurrentEra)
Dim m As Integer
For m = 1 To iMonthsInYear
Console.Write(ControlChars.Tab + "{0}", myCal.IsLeapMonth(y, m, GregorianCalendar.CurrentEra))
Next m
Console.WriteLine()
Next y
End Sub
End Class
'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
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.
Product | Versions |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.3, 1.4, 1.6, 2.0, 2.1 |
UWP | 10.0 |
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