title: Converting time stamps in excel to dates
body: <p>I have a very large excel spread sheet that has a column of time stamps. Does anyone know convert that over to a date? Is there a function I can use? I tried format cell date but that doesn't work. My file is 91,568 KB. If there is a simpler way to this that would be great. I'm open to ideas.</p>
  
  <p>Thank you in advance :)</p>
  
  <p>P.S.
  I don't know any programming languages</p>