[JesseK]

UPS definitely doesn't deliver on the weekends to my house. Yet I've received things via LaserShip, DHL (years ago) and USPS on Saturday or Sunday that had UPS labels on them. There's probably some inter-company contracting that may go through Amazon/etc if it ships from Amazon/etc via UPS but arrives at your doorstep on the weekend. Newegg also has such an arrangement.