How to Schedule Cron Jobs for taking data backup in debian.

Open root terminal
write command
crontab -e
# m h dom mon dow command
m stands for minutes
h stands for hours
dom stands for day of month
mon stands for month
dow stands for day of week

# m h dom mon dow command
15 13 13 5 5 cp -R  /home/user  /destination folder

This will copy you user data in destination folder on 1.59 Pm at 13th May.