How to increment date using "for loop" in format MMDDYY inside the shell script?

Shell Programming and Scripting
1 
Need to increment the date from "currentdate + 90days" inside the for loop (i=1 to i=50)
2

What have you tried so far?

3 
for i in {1..10}
do
   date +"%d/%m/%y" --date="-$i days ago"
done

but getting the error

date: 0551-402 Invalid character in date/time specification.
Usage: date [-u] [+"Field Descriptors"]
4

Verify that you have GNU date :

date --version
date (GNU coreutils) 5.97

If yes, then try:

for i in {1..10}
do
   date  --date="-${i} days ago" +"%d/%m/%y"
done
5

We are using AIX version not GNU. Provide the solution for AIX for date increment where --date is not supported.

6

If you have AIX you don't have a lot of options for date math. This snippet continues to come in handy:

for ((I=0; I<=50; I++))
do
        DATE=$(perl -e 'use POSIX qw(strftime);  print strftime "%Y/%m/%d\n", localtime(time()+($ARGV[0]*60*60*24));' -- -${I})
        echo "got date $DATE"
done