mkdir for calender format dir name

mkemptydir.sh

#!/bin/sh                                
                                         
for i in 14 15 16 17 18                  
    do                                   
    for j in `seq -w 1 12`           
        do                               
        for k in `seq -w 1 31`       
            do                           
                mkdir -p "$i""$j""$k""A";
        done                             
    done                                 
done