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DateTime.IsLeapYear Method

Returns an indication whether the specified year is a leap year.

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

public static bool IsLeapYear (
	int year
public static boolean IsLeapYear (
	int year
public static function IsLeapYear (
	year : int
) : boolean



A 4-digit year.

Return Value

true if year is a leap year; otherwise, false.

Exception typeCondition


year is less than 1 or greater than 9999.

year is specified as a 4-digit base 10 number; for example, 1996.

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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