Login to cPanel.
Locate and click on the "Cron Jobs" icon under the "Advanced" category.
Fill in the required information.
Common Settings - You can use this dropdown list to populate all but the last fields.
Minute - The minute setting for the cron job.
Hour - The hour setting for the cron job.
Day - The day setting for the cron job.
Month - The month setting for the cron job.
Weekday - The weekday setting for the cron job.
Command - The cron job command to execute. If you wanted to execute a script, the command would look similar to this:
php -q /home/ACCOUNTNAME/public_html/script_in_my_root_directory.php