 The trial was initially limited to San Francisco and the only retailer to participate in the first few weeks was 1-800-FLOWERS.In March 2013, the USPS faced new same-day competition for e-commerce deliveries from Google Shopping Express.In November 2013, the Postal Service began regular package delivery on Sundays for Amazon customers in New York and Los Angeles, which it expanded to 15 cities in May 2014.