title: Find the closest hour
body: <p>I have a list with these items:</p>
  
  <pre><code>hours = ['19:30', '20:10', '20:30', '21:00', '22:00']
  </code></pre>
  
  <p>Assuming that now it's 20:18, how can I get the '20:10' item from list? I want to use this to find the current running show in a TV Guide.</p>