title: Longest Gap between bunch of dates in excel
body: <p>I have a column of dates, and I want to find the maximum gap between 2 dates. How would we do it in excel?</p>
  
  <p>May 6, 2015
  May 9, 2015
  May 14, 2015
  May 17, 2015
  May 21, 2015</p>
  
  <p>For example, this should give the answer, May 14 - May 9 = 5 days is the longest gap</p>
  
  <p>Thanks in advance!</p>