JulianCalendar.IsLeapYear(Int32, Int32) Method
Definition
Important
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Determines whether the specified year in the specified era is a leap year.
public:
override bool IsLeapYear(int year, int era);public override bool IsLeapYear (int year, int era);override this.IsLeapYear : int * int -> boolPublic Overrides Function IsLeapYear (year As Integer, era As Integer) As BooleanParameters
- year
- Int32
An integer that represents the year.
- era
- Int32
An integer that represents the era.
Returns
true if the specified year is a leap year; otherwise, false.
Exceptions
year is outside the range supported by the calendar.
-or-
era is outside the range supported by the calendar.
Examples
The following example calls IsLeapYear for five years in each of the eras.
using namespace System;
using namespace System::Globalization;
int main()
{
// Creates and initializes a JulianCalendar.
JulianCalendar^ myCal = gcnew JulianCalendar;
// Displays the header.
Console::Write( "YEAR\t" );
for ( int y = 2001; y <= 2005; y++ )
Console::Write( "\t {0}", y );
Console::WriteLine();
// Checks five years in the current era.
Console::Write( "CurrentEra:" );
for ( int y = 2001; y <= 2005; y++ )
Console::Write( "\t {0}", myCal->IsLeapYear( y, JulianCalendar::CurrentEra ) );
Console::WriteLine();
// Checks five years in each of the eras.
for ( int i = 0; i < myCal->Eras->Length; i++ )
{
Console::Write( "Era {0}:\t", myCal->Eras[ i ] );
for ( int y = 2001; y <= 2005; y++ )
Console::Write( "\t {0}", myCal->IsLeapYear( y, myCal->Eras[ i ] ) );
Console::WriteLine();
}
}
/*
This code produces the following output.
YEAR 2001 2002 2003 2004 2005
CurrentEra: False False False True False
Era 1: False False False True False
*/
using System;
using System.Globalization;
public class SamplesJulianCalendar {
public static void Main() {
// Creates and initializes a JulianCalendar.
JulianCalendar myCal = new JulianCalendar();
// Displays the header.
Console.Write( "YEAR\t" );
for ( int y = 2001; y <= 2005; y++ )
Console.Write( "\t{0}", y );
Console.WriteLine();
// Checks five years in the current era.
Console.Write( "CurrentEra:" );
for ( int y = 2001; y <= 2005; y++ )
Console.Write( "\t{0}", myCal.IsLeapYear( y, JulianCalendar.CurrentEra ) );
Console.WriteLine();
// Checks five years in each of the eras.
for ( int i = 0; i < myCal.Eras.Length; i++ ) {
Console.Write( "Era {0}:\t", myCal.Eras[i] );
for ( int y = 2001; y <= 2005; y++ )
Console.Write( "\t{0}", myCal.IsLeapYear( y, myCal.Eras[i] ) );
Console.WriteLine();
}
}
}
/*
This code produces the following output.
YEAR 2001 2002 2003 2004 2005
CurrentEra: False False False True False
Era 1: False False False True False
*/
Imports System.Globalization
Public Class SamplesJulianCalendar
Public Shared Sub Main()
' Creates and initializes a JulianCalendar.
Dim myCal As New JulianCalendar()
' Displays the header.
Console.Write("YEAR" + ControlChars.Tab)
Dim y As Integer
For y = 2001 To 2005
Console.Write(ControlChars.Tab + "{0}", y)
Next y
Console.WriteLine()
' Checks five years in the current era.
Console.Write("CurrentEra:")
For y = 2001 To 2005
Console.Write(ControlChars.Tab + "{0}", myCal.IsLeapYear(y, JulianCalendar.CurrentEra))
Next y
Console.WriteLine()
' Checks five years in each of the eras.
Dim i As Integer
For i = 0 To myCal.Eras.Length - 1
Console.Write("Era {0}:" + ControlChars.Tab, myCal.Eras(i))
For y = 2001 To 2005
Console.Write(ControlChars.Tab + "{0}", myCal.IsLeapYear(y, myCal.Eras(i)))
Next y
Console.WriteLine()
Next i
End Sub
End Class
'This code produces the following output.
'
'YEAR 2001 2002 2003 2004 2005
'CurrentEra: False False False True False
'Era 1: False False False True False
Remarks
Unlike the Gregorian calendar, the Julian calendar defines a leap year as a year that is evenly divisible by four with no exceptions. Therefore, the calendar is inaccurate by one day every 128 years. For example, the year 1999 was not a leap year, but the year 2000 was. A common year has 365 days and a leap year has 366 days.
