UPS expects to deliver more than 34 million packages on the busiest day of the holiday season, double the amount on a normal day.
The Atlanta company expects the peak day to be Monday, Dec. 22.
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UPS forecast Wednesday that it will handle 585 million packages in December, 11 percent more than the same month last year.
Rival FedEx expects a busy holiday season too, with December shipments up 8.8 percent from last year.