12/14 - Last Order Day for FedEx Ground / Home Delivery, 12/16 - Last Order Day for USPS First Class, 12/17 - Last Order Day for USPS Priority Mail, 12/20 - Last Order Day for FedEx Express Saver, 12/21 - Last Order Day for FedEx 2 Day, 12/22 - First Order Day Not "guaranteed" Before Christmas