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TaiwanCalendar.IsLeapDay Method (Int32, Int32, Int32, Int32)

Determines whether the specified date in the specified era is a leap day.

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

public override bool IsLeapDay(
	int year,
	int month,
	int day,
	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.

day
Type: System.Int32

An integer from 1 to 31 that represents the day.

era
Type: System.Int32

An integer that represents the era.

Return Value

Type: System.Boolean
true if the specified day is a leap day; otherwise, false.

ExceptionCondition
ArgumentOutOfRangeException

year is outside the range supported by the calendar.

-or-

month is outside the range supported by the calendar.

-or-

day is outside the range supported by the calendar.

-or-

era is outside the range supported by the calendar.

Leap years in the Taiwan 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 day is a day that occurs only in a leap year. For example, the 29th day of February is the only leap day.

The following example calls IsLeapDay for the last day of the second month (February) for five years in each of the eras.

using System;
using System.Globalization;


public class SamplesTaiwanCalendar  {

   public static void Main()  {

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

      // Creates a holder for the last day of the second month (February). 
      int iLastDay;

      // Displays the header.
      Console.Write( "YEAR\t" );
      for ( int y = 90; y <= 94; y++ )
         Console.Write( "\t{0}", y );
      Console.WriteLine();

      // Checks five years in the current era.
      Console.Write( "CurrentEra:" );
      for ( int y = 90; y <= 94; y++ )  {
         iLastDay = myCal.GetDaysInMonth( y, 2, TaiwanCalendar.CurrentEra );
         Console.Write( "\t{0}", myCal.IsLeapDay( y, 2, iLastDay, TaiwanCalendar.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 = 90; y <= 94; y++ )  {
            iLastDay = myCal.GetDaysInMonth( y, 2, myCal.Eras[i] );
            Console.Write( "\t{0}", myCal.IsLeapDay( y, 2, iLastDay, myCal.Eras[i] ) );
         }
         Console.WriteLine();
      }

   }

}

/*
This code produces the following output.

YEAR            90      91      92      93      94
CurrentEra:     False   False   False   True    False
Era 1:          False   False   False   True    False

*/

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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