isInvalidTimeAndDate(GregorianCalendar) method
   
   
   Returns whether the given date matches Agentry's "invalid date" value. 
      Syntax
         
         
            public static 
            boolean  
            isInvalidTimeAndDate
            (
            GregorianCalendar 
            testDate
            )
         
      
      Parameters
         
         
            - 
               testDate – 
               the date to check
            
 
         
       
      Returns
         
         true if the date is invalid, or false if not.