JulianCalendar::IsLeapMonth Method (Int32, Int32, Int32)
Determines whether the specified month in the specified year in the specified era is a leap month.
Assembly: mscorlib (in mscorlib.dll)
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.
- era
-
Type:
System::Int32
An integer that represents the era.
Return Value
Type: System::BooleanThis method always returns false, unless overridden by a derived class.
| Exception | Condition |
|---|---|
| ArgumentOutOfRangeException | year is outside the range supported by the calendar. -or- month is outside the range supported by the calendar. -or- era is outside the range supported by the calendar. |
Unlike the Gregorian calendar, the Julian calendar defines a leap year as a year that is evenly divisible by four with no exceptions. Therefore, the calendar is inaccurate by one day every 128 years. For example, the year 1999 was not a leap year, but the year 2000 was. A common year has 365 days and a leap year has 366 days.
A leap month is an entire month that occurs only in a leap year. The Julian calendar does not have any leap months.
The following example calls IsLeapMonth for all the months in five years in the current era.
using namespace System; using namespace System::Globalization; int main() { // Creates and initializes a JulianCalendar. JulianCalendar^ myCal = gcnew JulianCalendar; // Checks all the months in five years in the current era. int iMonthsInYear; for ( int y = 2001; y <= 2005; y++ ) { Console::Write( " {0}:\t", y ); iMonthsInYear = myCal->GetMonthsInYear( y, JulianCalendar::CurrentEra ); for ( int m = 1; m <= iMonthsInYear; m++ ) Console::Write( "\t {0}", myCal->IsLeapMonth( y, m, JulianCalendar::CurrentEra ) ); Console::WriteLine(); } } /* This code produces the following output. 2001: False False False False False False False False False False False False 2002: False False False False False False False False False False False False 2003: False False False False False False False False False False False False 2004: False False False False False False False False False False False False 2005: False False False False False False False False False False False False */
Available since 10
.NET Framework
Available since 1.1