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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)

static member IsLeapYear : 
        year:int -> bool

Parameters

year
Type: System.Int32

A 4-digit year.

Return Value

Type: System.Boolean
true if year is a leap year; otherwise, false.

ExceptionCondition
ArgumentOutOfRangeException

year is less than 1 or greater than 9999.

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

year is always interpreted as a year in the Gregorian calendar. To determine whether a particular year was a leap year in some other calendar, call that calendar object's IsLeapYear method.

The following example uses the IsLeapYear method to determine which years between 1994 and 2014 are leap years. The example also illustrates the result when the AddYears method is used to add a year to a leap day.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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