if ( n1.honap <  n2.honap )
                return -1;
         if ( n1.honap > n2.honap )
                return 1;
         if ( n1.nap <  n2.nap )
                return -1;
         if ( n1.nap == n2.nap )
                return 0;
         if ( n1.nap > n2.nap )
                return 1;