The following article located at Retail Online Integration mentions that the USPS is adding package delivery on Sundays during the holidays to meet expected growing demand. This is definitely good news considering that industry followers are already dreading a repeat of last year’s missed shipping guarantees.

Remember that one size does not fit all. Talk to your fulfillment partner about your order composition, your holiday guarantees, and your project volume. There may be a different solution that can improve your bottom line or your customer satisfaction – or both.
Vision Consumer Products Fulfillment has decades of experience and industry expertise in consumer products fulfillment services. No matter who your customer is, we treat your customer as our own. We know what makes a raving fan out of an individual customer, as well as what makes a business partner trust you with their business. Call or email us to learn how. We’re certain we’ll be the best fulfillment warehouse partner you have ever had!
http://visioncpf.com
CPFSales@VisionMediamgmt.com