(PHP 3 >= 3.0.13, PHP 4, PECL)
mcal_date_valid -- 
     Returns 
TRUE if the given year, month, day is a valid date
    
Description
bool 
mcal_date_valid ( int year, int month, int day )
  
     mcal_date_valid() Returns TRUE if the given
     year, month and day is a valid date, FALSE if not.