title: NameError: name 'UTC' is not defined
body: <p>The output of <code>datetime.datetime.now()</code> outputs in my native timezone of UTC-8. I'd like to convert that to an appropriate timestamp with a tzinfo of UTC.</p>
  
  <pre><code>from datetime import datetime, tzinfo
  x = datetime.now()
  x = x.replace(tzinfo=UTC)
  </code></pre>
  
  <p>^ outputs NameError: name 'UTC' is not defined</p>
  
  <p><code>x.replace(tzinfo=&lt;UTC&gt;)</code> outputs SyntaxError: invalid syntax</p>
  
  <p><code>x.replace(tzinfo='UTC')</code> outputs TypeError: tzinfo argument must be None or of a tzinfo subclass, not type 'str'</p>
  
  <p>What is the correct syntax to use to accomplish my example?</p>