The software utility Cron is a time-based job scheduler in Unix-like computer operating systems. People who set up and maintain software environments use cron to schedule jobs (commands or shell scripts) to run periodically at fixed times, dates, or intervals.
It would ask which editor is suitable for you .Here I selected nano 2 Option
Here I have add 27 7 * * * ie 7:27 pm (We need to check the date in ubuntu) * means any time any day any week.
Now check in the /home/ami you can see the newfolder moon is created.