title: Excel 2016 Add-in how do i change column format
body: <p>I have an Excel 2016 Add-in and I would like to set the format on a couple of columns to Date (mm-dd-yyyy format) and center a couple of columns.  How can I do this in Excel 2016 JavaScript model?</p>
  
  <p>Also, I understand that the office model for 2016 does not allow you to change column width.  Does anybody have a work around for this?</p>
  
  <p>Thanks,
  George</p>