FREE Redbox Movie Rental Code October 9, 2012 by Mitchell Wischmann This post may contain a link to an affiliate. See my disclosure policy for more information. Yay! Today, October 10th only, you can get a FREE Redbox movie rental. Just head to a Redbox location and use promo code BIRTHDAY to get your free rental. It’s only free for one night, so don’t forget to return it!