With Christmas is this week away and the Nashville Post Office wants to remind customers about remaining holiday deadlines.  Nashville Postmaster Barri Betz says Saturday was the deadline for customers to use First-Class and Priority Mail postage for cards and letters packages to ensure delivery in time for Christmas.  For last-minute shoppers, tomorrow is the deadline for sending packages using Priority Mail Express.  Customers can request free package pickup online and the Postal Service will pick up packages as part of regular mail delivery the next business day.  Unlike other shipping companies, there is no fee for this service.