title: Weekends color css rule doesn't work in timeline view
body: <p>I wonder if css rule for weekends <code>.fc-sat, .fc-sun {background-color: red !important;}</code> works in timeline v.5. I tried to insert it in main.css but had no result.
  Thank you.</p>
  <p>I actually found the answer myself. In version 5, weekend css rule looks like that:</p>
  <pre><code>.fc-day-sun {
      background-color: red;
  }
  </code></pre>
  <p>However, I've found a bug there. Using the following css rule</p>
  <pre><code>.fc-day-sat {
      background-color: red;
  }
  </code></pre>
  <p>changes not only day slot background but also background of timeline slot frame for August, November and May. <a href="https://i.stack.imgur.com/dxUl8.png" rel="nofollow noreferrer">background-color</a></p>