title: Day name with I18n
body: <p>Without translation, this would get me today's day name:</p>
  
  <pre><code>Date.today.strftime("%A")
  </code></pre>
  
  <p>How would I localize it? </p>
  
  <p>I.e. "Mardi" if <code>I18n.locale</code> is set to <code>fr</code>.</p>