title: Show day, month and year with std::chrono?
body: <p>I read that I can show the current day, month and year with <a href="http://en.cppreference.com/w/cpp/chrono" rel="nofollow noreferrer"><code>std::chrono</code></a> but how I can do that?</p>
  
  <pre><code>// Example program
  #include &lt;iostream&gt;
  #include &lt;string&gt;
  #include &lt;chrono&gt;
  
  int main()
  {
    using namespace std::chrono;
    cout &lt;&lt; std::chrono::day;
  }
  </code></pre>
  
  <p>I do this code but it doesn't work, I always receive this </p>
  
  <pre><code> error: 'day' is not a member of 'std::chrono
  </code></pre>
  
  <p>What I'm doing wrong?</p>