title: How to get hours difference between two dates
body: <p>I'm working for first time on Go, in this case i have a string on UTC format, I would like to know, how can I get the difference in hours between my date and the time now.
  This is my current string</p>
  
  <pre><code>v := "2014-05-03 20:57 UTC"
  </code></pre>