If 30 days will have passed on Dec. 24 for a gift I purchased for Christmas, can I still return it for a full refund after the 30 day period?

Beat Buy extends their normal return policy during the holidays for just that reason. From their website: Customers can buy gifts and other items this holiday with the peace of mind of easy returns. Almost every purchase made throughout November and December can be returned through January 14, 2018. Purchases made October 29 through December 30, 2017 have an extended return period through January 14, 2018, excluding cell phones, devices that can be activated, AppleCare monthly plans, and Vivint products. All other terms and conditions of our Return & Exchange Promise apply.

No