The company also said it was setting up a subsidiary that would focus on expanding its drone-delivery options by filing for certification from the Federal Aviation Administration.
The U.S. Postal Service (USPS) already delivers packages on Sunday, particularly through its Priority Mail Express service, the agency confirmed to FOX Business. The USPS will also help UPS to meet its 7-day delivery promise.
These services are moving to 7-day delivery at a time when e-commerce sales have skyrocketed over the last 10 years and Americans are putting down billions of dollars for items purchased online.
Over the last 10 years, Americans have increased their spending on e-commerce by more than $100 billion, according to data from the U.S. Census Bureau.
Back in the first quarter of 2009, Americans spent $34 billion on online retail sales. Meanwhile, in the first quarter of 2019, Americans spent $137.7 billion -- which accounted for 10.2 percent of total sales made during that time, according to the U.S. Census.
Americans are also increasingly using online shopping services like Amazon on a regular basis.
The poll also found that 2 percent of Americans said they shop online every day, while 16 percent said they shop online at least once a week and 25 percent said they shop online at least once a month.
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Among those who do shop online, 92 percent said they bought items through Amazon, the poll found.
In its Tuesday announcement, UPS also said it would add 12,000 new package pickup locations inside CVS, Michaels Co. and Advance Auto Parts stores. The extra locations would bring the number of pickup points UPS has in the U.S. to 21,000 and 40,000 globally.
FOX Business’ Kathleen Joyce contributed to this report.