title: Rails timezone does not work as expected
body: <p>This does not return time in the pacific timezone:</p>
  
  <pre><code>Time.use_zone "Pacific Time (US &amp; Canada)" do
    Time.now
  end
  </code></pre>
  
  <p>This works and returns time in pacific timezone:</p>
  
  <pre><code>Time.now.in_time_zone "Pacific Time (US &amp; Canada)"
  </code></pre>
  
  <p>I am using gem Rails v4.1.0.rc1</p>