Calendar.IsLeapDay Method (Int32, Int32, Int32, Int32)
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When overridden in a derived class, determines whether the specified date in the specified era is a leap day.
Namespace: System.Globalization
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public MustOverride Function IsLeapDay ( _
year As Integer, _
month As Integer, _
day As Integer, _
era As Integer _
) As Boolean
public abstract 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
A positive integer that represents the month.
- day
Type: System.Int32
A positive integer 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.
Exceptions
| 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. |
Remarks
To make up for the difference between the calendar year and the actual time that the earth rotates around the sun or the actual time that the moon rotates around the earth, a leap year has a different number of days from a standard calendar year. Each Calendar implementation defines leap years differently.
A leap day is a day that occurs only in a leap year. For example, in the Gregorian calendar, the 29th day of February is the only leap day.
Notes to Inheritors
The derived class must support CurrentEra when it is passed as the era parameter. One way to support CurrentEra is by replacing it with the value stored in Eras[0], which is the value for the current era of the calendar.
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Xbox 360, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.