Holiday Stress: Amazon, Others Under Gun for 1-Day Delivery

Packages riding on a belt are scanned to be loaded onto delivery trucks at the Amazon Fulfillment center in Robbinsville Township, N.J. on Aug. 1, 2017. Julio Cortez/AP/File

NEW YORK —This year, holiday stress may take on a whole new meaning for online retailers.

Amazon, Walmart and others have promised to deliver more of their orders within 24 hours of customers clicking on “Buy.”