ATLANTA – As the holiday shopping season winds down, FedEx, UPS and online retailers are using the last few days to try to avoid the problems that occurred last year when severe winter weather and a surge in late orders from shoppers caused delivery delays. UPS spent $500 million this year upgrading its systems and processes and increased the number of seasonal workers it hired 11 percent to 90,000 to 95,000. The company expected to deliver more than 34 million packages on Monday, its busiest day ever. By midday Monday, UPS spokesman Andy McGowan said he expected packages to be delivered as planned. "All UPS air and ground operations are operating smoothly," he said. FedEx predicted its busiest day would be a week earlier, on Dec. 15, when it expected to move 22.6 million packages.