title: How can I get month name from month number
body: <p>I can get the next month's month number and year with:</p>
  
  <pre><code>(Time.now + 1.month).month
  # =&gt; 10
  (Time.now + 1.month).year
  # =&gt; 2015
  </code></pre>
  
  <p>How can I get <code>"October"</code> from <code>10</code>?</p>