news December 21st is the last Priority USPS day Dec 12, 2016 Christine Kocourek December 21st is the last shipping day that USPS guarantees that their priority mail will arrive by Christmas. Please get your orders in early so we can get them out in time for you to have them for your holiday parties. Thank you! Share this post Share 0 Tweet +1 Leave a Comment Name Email Message Please note, comments must be approved before they are published