JapaneseCalendar.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.

Exception Condition
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 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 day is a day that occurs only in a leap year. For example, the 29th day of Nigatsu (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 SamplesJapaneseCalendar  {

   public static void Main()  {

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

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

      // Displays the header.
      Console.Write( "YEAR\t" );
      for ( int y = 1; y <= 5; y++ )
         Console.Write( "\t{0}", y );
      Console.WriteLine();

      // Checks five years in the current era.
      Console.Write( "CurrentEra:" );
      for ( int y = 1; y <= 5; y++ )  {
         iLastDay = myCal.GetDaysInMonth( y, 2, JapaneseCalendar.CurrentEra );
         Console.Write( "\t{0}", myCal.IsLeapDay( y, 2, iLastDay, JapaneseCalendar.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 = 1; y <= 5; 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            1       2       3       4       5
CurrentEra:     False   False   False   True    False
Era 4:          False   False   False   True    False
Era 3:          False   False   True    False   False
Era 2:          True    False   False   False   True
Era 1:          True    False   False   False   True

*/

Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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