The Calgary Herald reports that "a change in how the U.S. Postal Service routes packages into Western Canada means it's probably a good time for Calgary Christmas shoppers to buy Canadian." The story says that "Calgary is in for its first holiday season without a postal clearing house that handles American parcels". It quotes a spokesman for the Canada Border Services Agency as saying that the USPS opted not to ship parcels to Calgary or Winnipeg, so incoming mail centers there have been closed.
Calgary Herald (subsciption site)