IsCalendarLeapYear function

Deprecated. Identifies whether the specified year is a leap year within the given era for the specific calendar.


BOOL IsCalendarLeapYear(
  _In_ CALID calId,
  _In_ UINT  year,
  _In_ UINT  era


calId [in]

The calendar identifier to use for checking leap year.

year [in]

The year to check.

era [in]

The era to check.

Return value

Returns TRUE if the specified year is a leap year, or FALSE otherwise. To get extended error information, the application can call GetLastError, which can return one of the following error codes:

  • ERROR_INVALID_PARAMETER. Any of the parameter values was invalid.


This function does not have an associated header file or library file. The application can call LoadLibrary with the DLL name (Kernel32.dll) to obtain a module handle. It can then call GetProcAddress with that module handle and the name of this function to get the function address.


Minimum supported client

Windows Vista [desktop apps only]

Minimum supported server

Windows Server 2008 [desktop apps only]



See also

National Language Support
National Language Support Functions