Change/modify the order date

I am creating many of my orders through the admin panel. Sometimes I create an order later than it was placed or delivered. Is there a way to specify the order's date manually, instead of automatically, when adding the order?? Is it possible to modify an order's date ('Date added'), after (a few days) it is created. Is there any way to do this?
thank you,

One place to start: https://www.opencart.com/index.php?rout ... n_id=35449 .