The Zip code report uses transaction date to pull in the information. This means that any online sales will still pull into your report for days that were closed.  You can view transactions on the Zip code report by Sales method to verify that this is where the information is coming from.
  1. Click on Sales
  2. Under Reports, Click ZIP code
  3. Adjust the date filter to show the date in question
  4. Adjust the Sales Method to reflect Online Sales
    User-added image
  5. Click View Report
  6. See that the Zip codes populating are from Online Sales