title: Convert formatted time to UTC milliseconds
body: <p>How to convert time in format</p>
  
  <pre><code>2009-01-01T01:02:01.111+02:00
  </code></pre>
  
  <p>to UTC in milliseconds?</p>
  
  <p>Is there already package for this conversion? I looked at the <a href="https://golang.org/src/time/format.go" rel="nofollow">https://golang.org/src/time/format.go</a> but couldn't find same format to convert. </p>