Add renewal date and send email reminders for web hosting accounts in WHM

Have a section to add a renewal date for a web hosting account in WHM and show that data on the account in cPanel.

I know you can add this in WHMCS, however not everyone has this and it may be too complicated to add it just for a renewal date. Also, once a renewal date is added, WHM should send email reminders (notification) to a specified admin when the renewal date is due in the following intervals, 1 month reminder, 7 days reminder and then a reminder on the due date.

Surely this is not hard to do and would be an excellent feature to have. I'm personally using WHMCS, however I want simplicity and this is the right way to achieve it. I'm surprised this has yet to be implemented and is extremely important for a reseller of web hosting accounts.

Please vote for this feature as it would be an excellent feature to add.